FW: HSRP question [7:62941]
true enoughi can just image in the event of a storm (mcast, bcast or spt loop) what would happen on that segment, specially running ip phones ;-) then again what you guys are doing could be (a) politically driven (b) transition phase. what about using auxvlan if indeed you guys are using ip phones. if my memory serves me correct aren't packets process switched between primary and secondaries ? thinking out loud :) regards, /vicky -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 10:38 PM To: [EMAIL PROTECTED] Subject: Re: HSRP question [7:62941] Issues I have with secondary ip address's : In the sh ip int br command, the 10.x.x.x secondary on the below interface does not show up The dhcp request for that interface will advertise out the primary interface not the secondary address, so it is extremely difficult to get the secondary ip address's a dhcp address It adds a lot of overhead to the interface connection tables and hsrp can act strange on certain routers, especially older routers with resource limits... interface FastEthernet1/0 description 590 Brennan St. ip address 10.17.212.2 255.255.255.0 secondary ip address 171.70.34.3 255.255.255.0 no ip redirects arp timeout 1740 standby priority 105 preempt standby ip 171.70.34.1 standby track Se6/0/0 standby 2 priority 105 preempt standby 2 ip 10.17.212.1 standby 2 track Se6/0/0 hold-queue 150 in sjbrn-gw1#sh ip int br Ethernet0/0192.168.54.131 YES NVRAM up up FastEthernet1/0171.70.34.3 YES NVRAM up up Serial6/0/0171.68.2.22 YES NVRAM up up Larry Letterman Network Engineer Cisco Systems - Original Message - From: Kelly Cobean To: Larry Letterman ; Cisco groupstudy Sent: Wednesday, February 12, 2003 7:01 PM Subject: RE: HSRP question Larry, Care to elaborate a little on the downside to doing this? We're doing it in our network but I'd love to present some reasons why we shouldn't and start looking at some proper VLAN config's. Right now we have something like 6 class-c networks configured on a single interface of each of our routers. I know it creates a really overpopulated broadcast domain...What else should I be considering? Thanks. Kelly Cobean -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 7:31 PM To: MADMAN; CCIE FUN Cc: [EMAIL PROTECTED] Subject: Re: HSRP question I have run hsrp on primary and secondary address's and it works.. However , I support Dave's thoughts that I dont like to do it for prduction networks or for long periods of time... Larry Letterman Network Engineer Cisco Systems - Original Message - From: MADMAN To: CCIE FUN Cc: Sent: Wednesday, February 12, 2003 3:29 PM Subject: Re: HSRP question Yes you can do this but I wouldn't design a network with secondaries. Just because you can doesn't mean you should. Secondaries should be used only for temporary situations, converting ip addresses for example. have fun Dave CCIE FUN wrote: Hi all I have two routers running HSRP for a network subnet lets say for e.g 1.1.1.0/24 on E0 of both the routers. now can i add secondary address to these routers on Interface E0 and also run HSRP for these secondary address. I want to add about 10 secondary address. how will the HSRP config be. Can i run HSRP for multiple secondary addresses on these routers. thanks __ Do you Yahoo!? Yahoo! Shopping - Send Flowers for Valentine's Day http://shopping.yahoo.com . -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 You don't make the poor richer by making the rich poorer. --Winston Churchill . . Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=62969t=62941 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: FW: HSRP question [7:62941]
Vicky Mair wrote: true enoughi can just image in the event of a storm (mcast, bcast or spt loop) what would happen on that segment, specially running ip phones ;-) then again what you guys are doing could be (a) politically driven (b) transition phase. what about using auxvlan if indeed you guys are using ip phones. if my memory serves me correct aren't packets process switched between primary and secondaries ? Yes by default packets are process switched between secondaries. got that call a few times, CPU is really busy, only to see all these secondaries. ip route-cache same-interface helps a lot. Yes secondaries are often driven by layer 8 issues, networks that grew out of control, cheezy ways to implement VLANS etc... Auxvlans are switch specific, at least I'm pretty sure. Dave thinking out loud :) regards, /vicky -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 10:38 PM To: [EMAIL PROTECTED] Subject: Re: HSRP question [7:62941] Issues I have with secondary ip address's : In the sh ip int br command, the 10.x.x.x secondary on the below interface does not show up The dhcp request for that interface will advertise out the primary interface not the secondary address, so it is extremely difficult to get the secondary ip address's a dhcp address It adds a lot of overhead to the interface connection tables and hsrp can act strange on certain routers, especially older routers with resource limits... interface FastEthernet1/0 description 590 Brennan St. ip address 10.17.212.2 255.255.255.0 secondary ip address 171.70.34.3 255.255.255.0 no ip redirects arp timeout 1740 standby priority 105 preempt standby ip 171.70.34.1 standby track Se6/0/0 standby 2 priority 105 preempt standby 2 ip 10.17.212.1 standby 2 track Se6/0/0 hold-queue 150 in sjbrn-gw1#sh ip int br Ethernet0/0192.168.54.131 YES NVRAM up up FastEthernet1/0171.70.34.3 YES NVRAM up up Serial6/0/0171.68.2.22 YES NVRAM up up Larry Letterman Network Engineer Cisco Systems - Original Message - From: Kelly Cobean To: Larry Letterman ; Cisco groupstudy Sent: Wednesday, February 12, 2003 7:01 PM Subject: RE: HSRP question Larry, Care to elaborate a little on the downside to doing this? We're doing it in our network but I'd love to present some reasons why we shouldn't and start looking at some proper VLAN config's. Right now we have something like 6 class-c networks configured on a single interface of each of our routers. I know it creates a really overpopulated broadcast domain...What else should I be considering? Thanks. Kelly Cobean -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 7:31 PM To: MADMAN; CCIE FUN Cc: [EMAIL PROTECTED] Subject: Re: HSRP question I have run hsrp on primary and secondary address's and it works.. However , I support Dave's thoughts that I dont like to do it for prduction networks or for long periods of time... Larry Letterman Network Engineer Cisco Systems - Original Message - From: MADMAN To: CCIE FUN Cc: Sent: Wednesday, February 12, 2003 3:29 PM Subject: Re: HSRP question Yes you can do this but I wouldn't design a network with secondaries. Just because you can doesn't mean you should. Secondaries should be used only for temporary situations, converting ip addresses for example. have fun Dave CCIE FUN wrote: Hi all I have two routers running HSRP for a network subnet lets say for e.g 1.1.1.0/24 on E0 of both the routers. now can i add secondary address to these routers on Interface E0 and also run HSRP for these secondary address. I want to add about 10 secondary address. how will the HSRP config be. Can i run HSRP for multiple secondary addresses on these routers. thanks __ Do you Yahoo!? Yahoo! Shopping - Send Flowers for Valentine's Day http://shopping.yahoo.com . -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 You don't make the poor richer by making the rich poorer. --Winston Churchill . . -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 You don't make the poor richer by making the rich poorer. --Winston Churchill Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=62976t=62941 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: FW: HSRP question [7:62941]
in the example I gave, from a 7500 router, I believe at the time isl was the only vlan sub-interface mode supported. That was why we did secondary ip's on the interfaces for the ip phoneselsewhere on the campus we use aux vlans and vlan interface with trunks... Larry Letterman Network Engineer Cisco Systems - Original Message - From: MADMAN To: Sent: Thursday, February 13, 2003 9:36 AM Subject: Re: FW: HSRP question [7:62941] Vicky Mair wrote: true enoughi can just image in the event of a storm (mcast, bcast or spt loop) what would happen on that segment, specially running ip phones ;-) then again what you guys are doing could be (a) politically driven (b) transition phase. what about using auxvlan if indeed you guys are using ip phones. if my memory serves me correct aren't packets process switched between primary and secondaries ? Yes by default packets are process switched between secondaries. got that call a few times, CPU is really busy, only to see all these secondaries. ip route-cache same-interface helps a lot. Yes secondaries are often driven by layer 8 issues, networks that grew out of control, cheezy ways to implement VLANS etc... Auxvlans are switch specific, at least I'm pretty sure. Dave thinking out loud :) regards, /vicky -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 10:38 PM To: [EMAIL PROTECTED] Subject: Re: HSRP question [7:62941] Issues I have with secondary ip address's : In the sh ip int br command, the 10.x.x.x secondary on the below interface does not show up The dhcp request for that interface will advertise out the primary interface not the secondary address, so it is extremely difficult to get the secondary ip address's a dhcp address It adds a lot of overhead to the interface connection tables and hsrp can act strange on certain routers, especially older routers with resource limits... interface FastEthernet1/0 description 590 Brennan St. ip address 10.17.212.2 255.255.255.0 secondary ip address 171.70.34.3 255.255.255.0 no ip redirects arp timeout 1740 standby priority 105 preempt standby ip 171.70.34.1 standby track Se6/0/0 standby 2 priority 105 preempt standby 2 ip 10.17.212.1 standby 2 track Se6/0/0 hold-queue 150 in sjbrn-gw1#sh ip int br Ethernet0/0192.168.54.131 YES NVRAM up up FastEthernet1/0171.70.34.3 YES NVRAM up up Serial6/0/0171.68.2.22 YES NVRAM up up Larry Letterman Network Engineer Cisco Systems - Original Message - From: Kelly Cobean To: Larry Letterman ; Cisco groupstudy Sent: Wednesday, February 12, 2003 7:01 PM Subject: RE: HSRP question Larry, Care to elaborate a little on the downside to doing this? We're doing it in our network but I'd love to present some reasons why we shouldn't and start looking at some proper VLAN config's. Right now we have something like 6 class-c networks configured on a single interface of each of our routers. I know it creates a really overpopulated broadcast domain...What else should I be considering? Thanks. Kelly Cobean -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 7:31 PM To: MADMAN; CCIE FUN Cc: [EMAIL PROTECTED] Subject: Re: HSRP question I have run hsrp on primary and secondary address's and it works.. However , I support Dave's thoughts that I dont like to do it for prduction networks or for long periods of time... Larry Letterman Network Engineer Cisco Systems - Original Message - From: MADMAN To: CCIE FUN Cc: Sent: Wednesday, February 12, 2003 3:29 PM Subject: Re: HSRP question Yes you can do this but I wouldn't design a network with secondaries. Just because you can doesn't mean you should. Secondaries should be used only for temporary situations, converting ip addresses for example. have fun Dave CCIE FUN wrote: Hi all I have two routers running HSRP for a network subnet lets say for e.g 1.1.1.0/24 on E0 of both the routers. now can i add secondary address to these routers on Interface E0 and also run HSRP for these secondary address. I want to add about 10 secondary address. how will the HSRP config be. Can i run HSRP for multiple secondary addresses on these routers. thanks __ Do you Yahoo!? Yahoo! Shopping - Send Flowers for Valentine's Day http://shopping.yahoo.com . -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 You don't make the poor richer by making the rich poorer. --Winston Churchill
RE: FW: HSRP question [7:62941]
comments in-line: -Original Message- From: MADMAN [mailto:[EMAIL PROTECTED]] Sent: Thursday, February 13, 2003 9:36 AM To: Vicky Mair Cc: [EMAIL PROTECTED] Subject: Re: FW: HSRP question [7:62941] Vicky Mair wrote: true enoughi can just image in the event of a storm (mcast, bcast or spt loop) what would happen on that segment, specially running ip phones ;-) then again what you guys are doing could be (a) politically driven (b) transition phase. what about using auxvlan if indeed you guys are using ip phones. if my memory serves me correct aren't packets process switched between primary and secondaries ? Yes by default packets are process switched between secondaries. got that call a few times, CPU is really busy, only to see all these secondaries. ip route-cache same-interface helps a lot. -- yikes! Yes secondaries are often driven by layer 8 issues, networks that grew out of control, cheezy ways to implement VLANS etc... - amen to that Auxvlans are switch specific, at least I'm pretty sure. -- my auxvlan comment was directed more towards c6k/catos...native ios does not supports voice (t1/fxs...etc) at least the last time we looked at itin our case we run hybrid on dist and non-l2 on core. we keep it simple. /vicky Dave thinking out loud :) regards, /vicky -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 10:38 PM To: [EMAIL PROTECTED] Subject: Re: HSRP question [7:62941] Issues I have with secondary ip address's : In the sh ip int br command, the 10.x.x.x secondary on the below interface does not show up The dhcp request for that interface will advertise out the primary interface not the secondary address, so it is extremely difficult to get the secondary ip address's a dhcp address It adds a lot of overhead to the interface connection tables and hsrp can act strange on certain routers, especially older routers with resource limits... interface FastEthernet1/0 description 590 Brennan St. ip address 10.17.212.2 255.255.255.0 secondary ip address 171.70.34.3 255.255.255.0 no ip redirects arp timeout 1740 standby priority 105 preempt standby ip 171.70.34.1 standby track Se6/0/0 standby 2 priority 105 preempt standby 2 ip 10.17.212.1 standby 2 track Se6/0/0 hold-queue 150 in sjbrn-gw1#sh ip int br Ethernet0/0192.168.54.131 YES NVRAM up up FastEthernet1/0171.70.34.3 YES NVRAM up up Serial6/0/0171.68.2.22 YES NVRAM up up Larry Letterman Network Engineer Cisco Systems - Original Message - From: Kelly Cobean To: Larry Letterman ; Cisco groupstudy Sent: Wednesday, February 12, 2003 7:01 PM Subject: RE: HSRP question Larry, Care to elaborate a little on the downside to doing this? We're doing it in our network but I'd love to present some reasons why we shouldn't and start looking at some proper VLAN config's. Right now we have something like 6 class-c networks configured on a single interface of each of our routers. I know it creates a really overpopulated broadcast domain...What else should I be considering? Thanks. Kelly Cobean -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 7:31 PM To: MADMAN; CCIE FUN Cc: [EMAIL PROTECTED] Subject: Re: HSRP question I have run hsrp on primary and secondary address's and it works.. However , I support Dave's thoughts that I dont like to do it for prduction networks or for long periods of time... Larry Letterman Network Engineer Cisco Systems - Original Message - From: MADMAN To: CCIE FUN Cc: Sent: Wednesday, February 12, 2003 3:29 PM Subject: Re: HSRP question Yes you can do this but I wouldn't design a network with secondaries. Just because you can doesn't mean you should. Secondaries should be used only for temporary situations, converting ip addresses for example. have fun Dave CCIE FUN wrote: Hi all I have two routers running HSRP for a network subnet lets say for e.g 1.1.1.0/24 on E0 of both the routers. now can i add secondary address to these routers on Interface E0 and also run HSRP for these secondary address. I want to add about 10 secondary address. how will the HSRP config be. Can i run HSRP for multiple secondary addresses on these routers. thanks __ Do you Yahoo!? Yahoo! Shopping - Send Flowers for Valentine's Day http://shopping.yahoo.com . -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 You don't make the poor richer by making the rich poorer. --Winston Churchill . . -- David Madland CCIE# 2016 Sr. Network
FW: FW: HSRP question [7:62941]
i was about to suggest using sub-interface but anyway you guys had reasons in doing so as you said. regards, /vicky -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Thursday, February 13, 2003 10:26 AM To: [EMAIL PROTECTED] Subject: Re: FW: HSRP question [7:62941] in the example I gave, from a 7500 router, I believe at the time isl was the only vlan sub-interface mode supported. That was why we did secondary ip's on the interfaces for the ip phoneselsewhere on the campus we use aux vlans and vlan interface with trunks... Larry Letterman Network Engineer Cisco Systems - Original Message - From: MADMAN To: Sent: Thursday, February 13, 2003 9:36 AM Subject: Re: FW: HSRP question [7:62941] Vicky Mair wrote: true enoughi can just image in the event of a storm (mcast, bcast or spt loop) what would happen on that segment, specially running ip phones ;-) then again what you guys are doing could be (a) politically driven (b) transition phase. what about using auxvlan if indeed you guys are using ip phones. if my memory serves me correct aren't packets process switched between primary and secondaries ? Yes by default packets are process switched between secondaries. got that call a few times, CPU is really busy, only to see all these secondaries. ip route-cache same-interface helps a lot. Yes secondaries are often driven by layer 8 issues, networks that grew out of control, cheezy ways to implement VLANS etc... Auxvlans are switch specific, at least I'm pretty sure. Dave thinking out loud :) regards, /vicky -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 10:38 PM To: [EMAIL PROTECTED] Subject: Re: HSRP question [7:62941] Issues I have with secondary ip address's : In the sh ip int br command, the 10.x.x.x secondary on the below interface does not show up The dhcp request for that interface will advertise out the primary interface not the secondary address, so it is extremely difficult to get the secondary ip address's a dhcp address It adds a lot of overhead to the interface connection tables and hsrp can act strange on certain routers, especially older routers with resource limits... interface FastEthernet1/0 description 590 Brennan St. ip address 10.17.212.2 255.255.255.0 secondary ip address 171.70.34.3 255.255.255.0 no ip redirects arp timeout 1740 standby priority 105 preempt standby ip 171.70.34.1 standby track Se6/0/0 standby 2 priority 105 preempt standby 2 ip 10.17.212.1 standby 2 track Se6/0/0 hold-queue 150 in sjbrn-gw1#sh ip int br Ethernet0/0192.168.54.131 YES NVRAM up up FastEthernet1/0171.70.34.3 YES NVRAM up up Serial6/0/0171.68.2.22 YES NVRAM up up Larry Letterman Network Engineer Cisco Systems - Original Message - From: Kelly Cobean To: Larry Letterman ; Cisco groupstudy Sent: Wednesday, February 12, 2003 7:01 PM Subject: RE: HSRP question Larry, Care to elaborate a little on the downside to doing this? We're doing it in our network but I'd love to present some reasons why we shouldn't and start looking at some proper VLAN config's. Right now we have something like 6 class-c networks configured on a single interface of each of our routers. I know it creates a really overpopulated broadcast domain...What else should I be considering? Thanks. Kelly Cobean -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 7:31 PM To: MADMAN; CCIE FUN Cc: [EMAIL PROTECTED] Subject: Re: HSRP question I have run hsrp on primary and secondary address's and it works.. However , I support Dave's thoughts that I dont like to do it for prduction networks or for long periods of time... Larry Letterman Network Engineer Cisco Systems - Original Message - From: MADMAN To: CCIE FUN Cc: Sent: Wednesday, February 12, 2003 3:29 PM Subject: Re: HSRP question Yes you can do this but I wouldn't design a network with secondaries. Just because you can doesn't mean you should. Secondaries should be used only for temporary situations, converting ip addresses for example. have fun Dave CCIE FUN wrote: Hi all I have two routers running HSRP for a network subnet lets say for e.g 1.1.1.0/24 on E0 of both the routers. now can i add secondary address to these routers on Interface E0 and also run HSRP for these secondary address. I want to add about 10 secondary address. how will the HSRP config be. Can i run HSRP for multiple secondary addresses on these routers. thanks
RE: HSRP question [7:62931]
Larry, Care to elaborate a little on the downside to doing this? We're doing it in our network but I'd love to present some reasons why we shouldn't and start looking at some proper VLAN config's. Right now we have something like 6 class-c networks configured on a single interface of each of our routers. I know it creates a really overpopulated broadcast domain...What else should I be considering? Thanks. Kelly Cobean -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 7:31 PM To: MADMAN; CCIE FUN Cc: [EMAIL PROTECTED] Subject: Re: HSRP question I have run hsrp on primary and secondary address's and it works.. However , I support Dave's thoughts that I dont like to do it for prduction networks or for long periods of time... Larry Letterman Network Engineer Cisco Systems - Original Message - From: MADMAN To: CCIE FUN Cc: Sent: Wednesday, February 12, 2003 3:29 PM Subject: Re: HSRP question Yes you can do this but I wouldn't design a network with secondaries. Just because you can doesn't mean you should. Secondaries should be used only for temporary situations, converting ip addresses for example. have fun Dave CCIE FUN wrote: Hi all I have two routers running HSRP for a network subnet lets say for e.g 1.1.1.0/24 on E0 of both the routers. now can i add secondary address to these routers on Interface E0 and also run HSRP for these secondary address. I want to add about 10 secondary address. how will the HSRP config be. Can i run HSRP for multiple secondary addresses on these routers. thanks __ Do you Yahoo!? Yahoo! Shopping - Send Flowers for Valentine's Day http://shopping.yahoo.com . -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 You don't make the poor richer by making the rich poorer. --Winston Churchill . FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP question [7:62941]
Issues I have with secondary ip address's : In the sh ip int br command, the 10.x.x.x secondary on the below interface does not show up The dhcp request for that interface will advertise out the primary interface not the secondary address, so it is extremely difficult to get the secondary ip address's a dhcp address It adds a lot of overhead to the interface connection tables and hsrp can act strange on certain routers, especially older routers with resource limits... interface FastEthernet1/0 description 590 Brennan St. ip address 10.17.212.2 255.255.255.0 secondary ip address 171.70.34.3 255.255.255.0 no ip redirects arp timeout 1740 standby priority 105 preempt standby ip 171.70.34.1 standby track Se6/0/0 standby 2 priority 105 preempt standby 2 ip 10.17.212.1 standby 2 track Se6/0/0 hold-queue 150 in sjbrn-gw1#sh ip int br Ethernet0/0192.168.54.131 YES NVRAM up up FastEthernet1/0171.70.34.3 YES NVRAM up up Serial6/0/0171.68.2.22 YES NVRAM up up Larry Letterman Network Engineer Cisco Systems - Original Message - From: Kelly Cobean To: Larry Letterman ; Cisco groupstudy Sent: Wednesday, February 12, 2003 7:01 PM Subject: RE: HSRP question Larry, Care to elaborate a little on the downside to doing this? We're doing it in our network but I'd love to present some reasons why we shouldn't and start looking at some proper VLAN config's. Right now we have something like 6 class-c networks configured on a single interface of each of our routers. I know it creates a really overpopulated broadcast domain...What else should I be considering? Thanks. Kelly Cobean -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Larry Letterman Sent: Wednesday, February 12, 2003 7:31 PM To: MADMAN; CCIE FUN Cc: [EMAIL PROTECTED] Subject: Re: HSRP question I have run hsrp on primary and secondary address's and it works.. However , I support Dave's thoughts that I dont like to do it for prduction networks or for long periods of time... Larry Letterman Network Engineer Cisco Systems - Original Message - From: MADMAN To: CCIE FUN Cc: Sent: Wednesday, February 12, 2003 3:29 PM Subject: Re: HSRP question Yes you can do this but I wouldn't design a network with secondaries. Just because you can doesn't mean you should. Secondaries should be used only for temporary situations, converting ip addresses for example. have fun Dave CCIE FUN wrote: Hi all I have two routers running HSRP for a network subnet lets say for e.g 1.1.1.0/24 on E0 of both the routers. now can i add secondary address to these routers on Interface E0 and also run HSRP for these secondary address. I want to add about 10 secondary address. how will the HSRP config be. Can i run HSRP for multiple secondary addresses on these routers. thanks __ Do you Yahoo!? Yahoo! Shopping - Send Flowers for Valentine's Day http://shopping.yahoo.com . -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 You don't make the poor richer by making the rich poorer. --Winston Churchill . . Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=62941t=62941 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Token Ring/HSRP Question [7:61359]
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Seems that after 11.3(9) they fixed a few bugs regarding HSRP. You can try it. http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/rn113m/rn113mnt.htm#xtocid25 .2eu c MArtijn - -Oorspronkelijk bericht- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Namens Simon Watson Verzonden: maandag 20 januari 2003 11:08 Aan: [EMAIL PROTECTED] Onderwerp: Token Ring/HSRP Question [7:61359] Hi Guys I'm going to a client's site that has a 2513 router with 11.3(11a) IOS (image is c2500-ds-l_113-11a.bin). 2 things: I'm looking to set up HSRP on the router, should I have any issues with that level of software ?Also are there an issues I should be aware of when configuring HSRP on token ring routers ?? Thanks in advance Simon. - Help STOP SPAM: Try the new MSN 8 and get 2 months FREE* Version: PGP 8.0 iQA/AwUBPi3HR3dq56XWk+VyEQJSSwCgoyJ1D/+pXgdipbJ+6xW4DiiwIj0AoO8m n9jRny4WKcn+HQ+oy4vM5jyy =3WHB -END PGP SIGNATURE- Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61517t=61359 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Token Ring/HSRP Question [7:61359]
Hi Guys I'm going to a client's site that has a 2513 router with 11.3(11a) IOS (image is c2500-ds-l_113-11a.bin). 2 things: I'm looking to set up HSRP on the router, should I have any issues with that level of software ?Also are there an issues I should be aware of when configuring HSRP on token ring routers ?? Thanks in advance Simon. Help STOP SPAM: Try the new MSN 8 and get 2 months FREE* Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61359t=61359 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Token Ring/HSRP Question [7:61359]
HSRP has been supported for a long time, even on Token Ring. It was supported in 11.3, I think in all varieties, but you would have to check for sure in the Release Notes to see if your particular image supports it, but I bet it does. You can find documentation for Cisco's older versions of IOS rather readily (at least on the old site). Start here: http://www.cisco.com/univercd/home/home.htm Use the pull-down menu to the right under Product Documentation to get the docs for 11.3. The Master Index will help, as will the Release Notes. To learn about configuring HSRP on that vintage router, go to Configuration Guides and Command References. Go to: P1C: Network Protocols Configuration Guide, Part 1 Then go to: Configuring IP Services That document contains a section called Configure the Hot Standby Router Protocol. Don't search on HSRP because the document doesn't use the acronym! Hey, they couldn't make it easy, could they? HTH ___ Priscilla Oppenheimer www.troubleshootingnetworks.com www.priscilla.com Simon Watson wrote: Hi Guys I'm going to a client's site that has a 2513 router with 11.3(11a) IOS (image is c2500-ds-l_113-11a.bin). 2 things: I'm looking to set up HSRP on the router, should I have any issues with that level of software ?Also are there an issues I should be aware of when configuring HSRP on token ring routers ?? Thanks in advance Simon. Help STOP SPAM: Try the new MSN 8 and get 2 months FREE* Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61400t=61359 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Token Ring/HSRP Question [7:61359]
On Monday 20 January 2003 03:12 pm, Priscilla Oppenheimer wrote: HSRP has been supported for a long time, even on Token Ring. It was supported in 11.3, I think in all varieties, but you would have to check for sure in the Release Notes to see if your particular image supports it, but I bet it does. You can find documentation for Cisco's older versions of IOS rather readily (at least on the old site). Start here: http://www.cisco.com/univercd/home/home.htm Use the pull-down menu to the right under Product Documentation to get the docs for 11.3. The Master Index will help, as will the Release Notes. To learn about configuring HSRP on that vintage router, go to Configuration Guides and Command References. Go to: P1C: Network Protocols Configuration Guide, Part 1 Then go to: Configuring IP Services That document contains a section called Configure the Hot Standby Router Protocol. Don't search on HSRP because the document doesn't use the acronym! Hey, they couldn't make it easy, could they? HTH ___ Priscilla Oppenheimer www.troubleshootingnetworks.com www.priscilla.com Simon Watson wrote: Hi Guys I'm going to a client's site that has a 2513 router with 11.3(11a) IOS (image is c2500-ds-l_113-11a.bin). 2 things: I'm looking to set up HSRP on the router, should I have any issues with that level of software ?Also are there an issues I should be aware of when configuring HSRP on token ring routers ?? Thanks in advance Simon. --- - Help STOP SPAM: Try the new MSN 8 and get 2 months FREE* Nondisclosure violations to [EMAIL PROTECTED] http://www.cisco.com/warp/public/619/hsrpguide2.html Pay particular attention to the number of groups that are available when configuring HSRP on Token Ring networks. HTH -- Michael W. Oliver, CCNP | IPv6 FreeBSD mizark | The tree of liberty must be refreshed [EMAIL PROTECTED] | from time to time with the blood of http://michael.gargantuan.com/ | patriots and tyrants. (via IPv4 and IPv6) | - President Thomas Jefferson IPv6 ASPathTree, Looking Glass | Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61402t=61359 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Token Ring/HSRP Question [7:61344]
Hi Guys I'm going to a client's site that has a 2513 router with 11.3(11a) IOS (image is c2500-ds-l_113-11a.bin). 2 things: I'm looking to set up HSRP on the router, should I have any issues with that level of software ?Also is there an issues I should be aware of when configuring HSRP on token ring routers ?? Thanks in advance Simon. Protect your PC - Click here for McAfee.com VirusScan Online Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61344t=61344 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
HSRP Question - RSM's on 6500's
I have two Catalyst 6500's, each with an RSM in module 15 and module 16. The RSM in module 15 is configured, but the module in 16 is not. The two Catalyst 6500's have a couple VLAN's which are trunked together with ISL, and we are doing HSRP between the RSM's in module 15. If one of the Catalyst's died or if there was a problem with one of the RSM's, the traffic would route through the other Catalyst that is still up. Here is my question...We want to utilize the RSM's sitting in module 16 on each of the switches, and add even more redundancy to the site. Is there a way to configure the RSM's so if one module died, the other one would pick up in its place, while also keeping the HSRP running between to two seperate switches as well? Any ideas would be a great help, or if you have a link on Cisco's site that handles this situation. Thanks- Glenn Allison, CCNP, CCDA, MCSE _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP Question - RSM's on 6500's
Hi Glenn- We have our core configured exactly as you want to do. The following link details how to do it: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sft_6_1/configgd /redund.htm Basically, the redundant supervisors fail over automatically. You need to enable a "four-way" HSRP configuration with the four MSFCs. In our case, we have the odd vlans using switch "B" as the active HSRP peer and the even vlans using switch "A" as the active peer. You adjust the standby priorities to accomplish this: VLAN "Even" Switch "A", MSFC 1 (Mod 15) == Priority 110 Switch "A", MSFC 2 (Mod 16) == Priority 109 Switch "B", MSFC 1 (Mod 15) == Priority 108 Switch "B", MSFC 2 (Mod 16) == Priority 107 VLAN "Odd" Switch "A", MSFC 1 (Mod 15) == Priority 108 Switch "A", MSFC 2 (Mod 16) == Priority 107 Switch "B", MSFC 1 (Mod 15) == Priority 110 Switch "B", MSFC 2 (Mod 16) == Priority 109 Hope this helps, Scott ""Glenn Allison"" [EMAIL PROTECTED] wrote in message 96cnp0$iq6$[EMAIL PROTECTED]">news:96cnp0$iq6$[EMAIL PROTECTED]... I have two Catalyst 6500's, each with an RSM in module 15 and module 16. The RSM in module 15 is configured, but the module in 16 is not. The two Catalyst 6500's have a couple VLAN's which are trunked together with ISL, and we are doing HSRP between the RSM's in module 15. If one of the Catalyst's died or if there was a problem with one of the RSM's, the traffic would route through the other Catalyst that is still up. Here is my question...We want to utilize the RSM's sitting in module 16 on each of the switches, and add even more redundancy to the site. Is there a way to configure the RSM's so if one module died, the other one would pick up in its place, while also keeping the HSRP running between to two seperate switches as well? Any ideas would be a great help, or if you have a link on Cisco's site that handles this situation. Thanks- Glenn Allison, CCNP, CCDA, MCSE _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP Question - RSM's on 6500's
Thanks Scott- This is just what I was looking for. -Glenn ""Scott Froese"" [EMAIL PROTECTED] wrote in message 96csho$un0$[EMAIL PROTECTED]">news:96csho$un0$[EMAIL PROTECTED]... Hi Glenn- We have our core configured exactly as you want to do. The following link details how to do it: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/sft_6_1/configgd /redund.htm Basically, the redundant supervisors fail over automatically. You need to enable a "four-way" HSRP configuration with the four MSFCs. In our case, we have the odd vlans using switch "B" as the active HSRP peer and the even vlans using switch "A" as the active peer. You adjust the standby priorities to accomplish this: VLAN "Even" Switch "A", MSFC 1 (Mod 15) == Priority 110 Switch "A", MSFC 2 (Mod 16) == Priority 109 Switch "B", MSFC 1 (Mod 15) == Priority 108 Switch "B", MSFC 2 (Mod 16) == Priority 107 VLAN "Odd" Switch "A", MSFC 1 (Mod 15) == Priority 108 Switch "A", MSFC 2 (Mod 16) == Priority 107 Switch "B", MSFC 1 (Mod 15) == Priority 110 Switch "B", MSFC 2 (Mod 16) == Priority 109 Hope this helps, Scott ""Glenn Allison"" [EMAIL PROTECTED] wrote in message 96cnp0$iq6$[EMAIL PROTECTED]">news:96cnp0$iq6$[EMAIL PROTECTED]... I have two Catalyst 6500's, each with an RSM in module 15 and module 16. The RSM in module 15 is configured, but the module in 16 is not. The two Catalyst 6500's have a couple VLAN's which are trunked together with ISL, and we are doing HSRP between the RSM's in module 15. If one of the Catalyst's died or if there was a problem with one of the RSM's, the traffic would route through the other Catalyst that is still up. Here is my question...We want to utilize the RSM's sitting in module 16 on each of the switches, and add even more redundancy to the site. Is there a way to configure the RSM's so if one module died, the other one would pick up in its place, while also keeping the HSRP running between to two seperate switches as well? Any ideas would be a great help, or if you have a link on Cisco's site that handles this situation. Thanks- Glenn Allison, CCNP, CCDA, MCSE _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP Question - RSM's on 6500's
Glen, What about this? Set up 2 HSRP groups. Group 1 would consist of MSM in slot 15 on CAT 1, and MSM in slot 15 on CAT 2. Group 2 would consist of MSM in slot 16 on CAT 1, and MSM in slot 16 on CAT 2. You said you have 2 VLANs. What about setting 2 default gateways for VLAN 1 going to the virtual interfaces for the 2 HSRP groups. Set the lower cost on the virtual interface of HSRP group 1 Then for VLAN 2 also set 2 default gateways for the 2 HSRP virtual interfaces. Set the lower cost on this one to the virtual interface on HSRP group 2. That way you would have each VLAN set to fail over to the other HSRP group with the 2 default gateways and each HSRP group would obviously have failover. You would have super failover. Crazy idea? I'm interested to see the other responses. I am studying HSRP and VRRP alot right now. Brian From: "Glenn Allison" [EMAIL PROTECTED] Reply-To: "Glenn Allison" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: HSRP Question - RSM's on 6500's Date: Tue, 13 Feb 2001 18:35:53 -0600 I have two Catalyst 6500's, each with an RSM in module 15 and module 16. The RSM in module 15 is configured, but the module in 16 is not. The two Catalyst 6500's have a couple VLAN's which are trunked together with ISL, and we are doing HSRP between the RSM's in module 15. If one of the Catalyst's died or if there was a problem with one of the RSM's, the traffic would route through the other Catalyst that is still up. Here is my question...We want to utilize the RSM's sitting in module 16 on each of the switches, and add even more redundancy to the site. Is there a way to configure the RSM's so if one module died, the other one would pick up in its place, while also keeping the HSRP running between to two seperate switches as well? Any ideas would be a great help, or if you have a link on Cisco's site that handles this situation. Thanks- Glenn Allison, CCNP, CCDA, MCSE _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ Get your FREE download of MSN Explorer at http://explorer.msn.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
hsrp question..a tough one for me
A question was recently posed: Two routers-subnet for 12 hosts. Do hsrp. naturally you assume a subnet for 14 hosts, one address each for router a and b. then don't you need an address for the virtual ip for hsrp. This only leaves 11 host addresses available. My question was, "can you use one of the addresses from one of the routers for the virtual ip address for hsrp". This would put you back up to 12 host addresses. Is this the right answer? thanks, bk _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: hsrp question..a tough one for me
Nope. Each router need one ip and the virtual ip will be all computer's gateway. That means you need to use 3 ip addresses. You only have 11 to use. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of ipguru Sent: Thursday, January 11, 2001 12:09 PM To: [EMAIL PROTECTED] Subject: hsrp question..a tough one for me A question was recently posed: Two routers-subnet for 12 hosts. Do hsrp. naturally you assume a subnet for 14 hosts, one address each for router a and b. then don't you need an address for the virtual ip for hsrp. This only leaves 11 host addresses available. My question was, "can you use one of the addresses from one of the routers for the virtual ip address for hsrp". This would put you back up to 12 host addresses. Is this the right answer? thanks, bk _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: hsrp question..a tough one for me
no. You need 1 ip per router; besides the ip for the virtual. You cannot use an ip that belongs to either physical interface nor ip's of any of the devices that make up the network. The ip you chose for the virtual hsrp will have its own virtual hardware address given by the router- this would also be a good reason why 1 ip cannot be shared. good luck. Raul. From: ipguru [EMAIL PROTECTED] Reply-To: ipguru [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: hsrp question..a tough one for me Date: Thu, 11 Jan 2001 11:09:05 -0600 A question was recently posed: Two routers-subnet for 12 hosts. Do hsrp. naturally you assume a subnet for 14 hosts, one address each for router a and b. then don't you need an address for the virtual ip for hsrp. This only leaves 11 host addresses available. My question was, "can you use one of the addresses from one of the routers for the virtual ip address for hsrp". This would put you back up to 12 host addresses. Is this the right answer? thanks, bk _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ Get your FREE download of MSN Explorer at http://explorer.msn.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: hsrp question..a tough one for me
You CAN'T use one of your physical router IP addresses for the virtual. There will be problems with the MAC addresses learned and cached by your clients. The MAC address for the virtual router is virtual, the MAC address for the router is physical. The correct answer would be to 1)re-address your network (using a subnet mask other than 240), allowing more IP addresses, 2)use DHCP with a short lease period and lease IP addresses as needed, or 3)use ip unnumbered on the routers freeing two IP addresses and then using one of the freed addresses for your virtual. I have tried "3" in lab, and it worked fine. There are probably more solutions, but these were from the top of my head. HTH, Evan -Original Message- From: ipguru [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 11, 2001 11:09 AM To: [EMAIL PROTECTED] Subject: hsrp question..a tough one for me A question was recently posed: Two routers-subnet for 12 hosts. Do hsrp. naturally you assume a subnet for 14 hosts, one address each for router a and b. then don't you need an address for the virtual ip for hsrp. This only leaves 11 host addresses available. My question was, "can you use one of the addresses from one of the routers for the virtual ip address for hsrp". This would put you back up to 12 host addresses. Is this the right answer? thanks, bk _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: hsrp question..a tough one for me
Thanks! That is the answer i was looking for! Evan Francen wrote: You CAN'T use one of your physical router IP addresses for the virtual. There will be problems with the MAC addresses learned and cached by your clients. The MAC address for the virtual router is virtual, the MAC address for the router is physical. The correct answer would be to 1)re-address your network (using a subnet mask other than 240), allowing more IP addresses, 2)use DHCP with a short lease period and lease IP addresses as needed, or 3)use ip unnumbered on the routers freeing two IP addresses and then using one of the freed addresses for your virtual. I have tried "3" in lab, and it worked fine. There are probably more solutions, but these were from the top of my head. HTH, Evan -Original Message- From: ipguru [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 11, 2001 11:09 AM To: [EMAIL PROTECTED] Subject: hsrp question..a tough one for me A question was recently posed: Two routers-subnet for 12 hosts. Do hsrp. naturally you assume a subnet for 14 hosts, one address each for router a and b. then don't you need an address for the virtual ip for hsrp. This only leaves 11 host addresses available. My question was, "can you use one of the addresses from one of the routers for the virtual ip address for hsrp". This would put you back up to 12 host addresses. Is this the right answer? thanks, bk _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
HSRP Question
Hello group I have a general question. Is there any potential pitfalls to watch for when implementing HSRP for redundancy. Thanks for all imput _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP question
Here is the official answer: The standby router automatically assumes the role when the active router fails or is removed from service. This new active router remains the forwarding router even when the former active router with the higher priority regains the service in the network. The former active router can be configured to resume the forwarding router role from a router with a lower priority. To make the router resume the forwarding role, you must enter the PREEMPT COMMAND this will make the former router assume its previous role. I hope this make sense. _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
HSRP question
When using HSRP, what happens when the primary gateway goes down, then back up? Does it become the primary again? Thanks. _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP question
yes -Original Message- From: Doug Laing [mailto:[EMAIL PROTECTED]] Sent: 21 November 2000 12:36 To: [EMAIL PROTECTED] Subject: HSRP question When using HSRP, what happens when the primary gateway goes down, then back up? Does it become the primary again? Thanks. _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP question
but not a simple yes the "depends" paradyne pops up and declares that: if "preempt" is configured it will re-assume primary and you might want to configure delay if a router coming online has a large routing table to build - you want it to do that first before taking back priority. preempt (Optional) The router is configured to preempt, which means that when the local router has a Hot Standby priority higher than the current active router, the local router should attempt to assume control as the active router. If preempt is not configured, the local router assumes control as the active router only if it receives information indicating that there is no router currently in the active state (acting as the designated router). http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/np1_r /1rprt2/1rip.htm#39359 has further explanation under "standby priority, standby preempt". Kevin Wigle - Original Message - From: "McCallum, Robert" [EMAIL PROTECTED] To: "'Doug Laing'" [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Tuesday, November 21, 2000 7:58 AM Subject: RE: HSRP question yes -Original Message- From: Doug Laing [mailto:[EMAIL PROTECTED]] Sent: 21 November 2000 12:36 To: [EMAIL PROTECTED] Subject: HSRP question When using HSRP, what happens when the primary gateway goes down, then back up? Does it become the primary again? Thanks. _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP question
This depends on your configuration. If you configure "Standby group preempt" on the interface, the interface with the highest priority will allways become active. If you don't configure this feature, the secondary interface will stay active. Taco Hettema CCNP CCDP -Original Message- From: Doug Laing [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 21, 2000 1:36 PM To: [EMAIL PROTECTED] Subject: HSRP question When using HSRP, what happens when the primary gateway goes down, then back up? Does it become the primary again? Thanks. _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP question
If you have the preempt command on the primary device -Original Message- From: McCallum, Robert [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 21, 2000 6:58 AM To: 'Doug Laing'; [EMAIL PROTECTED] Subject: RE: HSRP question yes -Original Message- From: Doug Laing [mailto:[EMAIL PROTECTED]] Sent: 21 November 2000 12:36 To: [EMAIL PROTECTED] Subject: HSRP question When using HSRP, what happens when the primary gateway goes down, then back up? Does it become the primary again? Thanks. _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP question --help
It is entirely up to you as to what group number you choose. Logic tends to say you should use the same numbers so that fault finding and general logic is easy to follow. But at the end of the day you could have group number 1 within vlan 12 if you wished. Hope this helps. -Original Message- From: Zhang Jin [mailto:[EMAIL PROTECTED]] Sent: 11 October 2000 06:16 To: [EMAIL PROTECTED] Subject: HSRP question --help Dear group, tomorrow I will take the BCSMN exam.Only 1 question confused me,that is: in RSM module,when I configure HSRP as follows: interface vlan vlannumber ip address ipaddress subnet_mask standby groupid preempt standby ip ipaddress question is whether should I make the vannumber=groupid? Please reply me ASAP. thank you! dean **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP question --help
Dean, Whether or not you use the VLAN id as the group ID is up to you. On my network I have one VLAN running over one HSRP group and three others running over another just to balance out the load on 2 T1s. -Original Message- From: [EMAIL PROTECTED] Sent: Tuesday, October 10, 2000 10:29 PM To: [EMAIL PROTECTED] Cc: Subject: HSRP question --help Dear group, tomorrow I will take the BCSMN exam.Only 1 question confused me,that is: in RSM module,when I configure HSRP as follows: interface vlan vlannumber ip address ipaddress subnet_mask standby groupid preempt standby ip ipaddress question is whether should I make the vannumber=groupid? Please reply me ASAP. thank you! dean **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
HSRP question --help
Dear group, tomorrow I will take the BCSMN exam.Only 1 question confused me,that is: in RSM module,when I configure HSRP as follows: interface vlan vlannumber ip address ipaddress subnet_mask standby groupid preempt standby ip ipaddress question is whether should I make the vannumber=groupid? Please reply me ASAP. thank you! dean **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP Question
SO are we saying that if we have two routers setup the same way defaulting to standby "0", Then when one drops the other will take over? I guess another way of saying it is, the two routers are defaulting to "0" and they will automatically become the backup for each otherI think this is incorrect but let me know. Thanks, Mark Brian Sickles [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... I respectfully disagree... I believe the default HSRP group of 0 (zero) will be invoked. It would only not work if the other HSRP participants were configured to use group 1. This is a common config mistake, where specific groups are created (say, to permit identification of unique HSRP participants via the HSRP MAC address that would be created), and you omit the group number on one or more of the commands. But in the provided example, standby group 0 is created, with HSRP MAC address of 00-00-0c-07- ac-00 being mapped to IP address 1.0.0.4 by the active router. Brian W. Sickles, CCIE #2534 Senior Network Architect TimeBridge Technologies 700 East Gate Drive, Suite 240 Mount Laurel, NJ 08054 (856) 778-8000 x-13 (856) 642-2988 FAX It will not work :-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mark Sent: Tuesday, June 06, 2000 12:19 PM To: [EMAIL PROTECTED] Subject: HSRP Question When configuring HSRP, Cisco gives the example of: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby 1 ip 1.0.0.4 standby 1 preempt standby 1 priority 110 standby authentication microdot The question is: If the group number ie; standby "1", is not included such as the following, what happens? Example: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby ip 1.0.0.4 standby preempt standby priority 110 standby authentication microdot Thanks, Mark ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] --- ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
HSRP Question
When configuring HSRP, Cisco gives the example of: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby 1 ip 1.0.0.4 standby 1 preempt standby 1 priority 110 standby authentication microdot The question is: If the group number ie; standby "1", is not included such as the following, what happens? Example: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby ip 1.0.0.4 standby preempt standby priority 110 standby authentication microdot Thanks, Mark ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP Question
It will not work :-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mark Sent: Tuesday, June 06, 2000 12:19 PM To: [EMAIL PROTECTED] Subject: HSRP Question When configuring HSRP, Cisco gives the example of: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby 1 ip 1.0.0.4 standby 1 preempt standby 1 priority 110 standby authentication microdot The question is: If the group number ie; standby "1", is not included such as the following, what happens? Example: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby ip 1.0.0.4 standby preempt standby priority 110 standby authentication microdot Thanks, Mark ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP Question
Mark, This WILL work, but only if you have ONE interface configured for HSRP on each router. If you are going to have Multiple interfaces configured for HSRP on one router then you have to have the Standby group number. EF -Original Message- From: Tom Thomas [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 06, 2000 12:44 PM To: Mark; [EMAIL PROTECTED] Subject: RE: HSRP Question It will not work :-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mark Sent: Tuesday, June 06, 2000 12:19 PM To: [EMAIL PROTECTED] Subject: HSRP Question When configuring HSRP, Cisco gives the example of: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby 1 ip 1.0.0.4 standby 1 preempt standby 1 priority 110 standby authentication microdot The question is: If the group number ie; standby "1", is not included such as the following, what happens? Example: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby ip 1.0.0.4 standby preempt standby priority 110 standby authentication microdot Thanks, Mark ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP Question
My interpretation of the examples that are presented are that the first configuration will work, but will the second. Now, I am by no means an expert, but I found in my handy dandy "Internetwork Troubleshooting Handbook" where their example does not include the standby group number. I also read that by not using a group number (ie 1, in this case) the standby group would default to "0", and it would work. Could somebody please verify this for me, because I would hate to propogate incorrect information. Thanks. Eric L. McMasters, CCNP/CCDA OSSN - Sr. Network Engineer Phone:913.859.1986 PCS:913.485.9734 Fax: 913.859.1234 -Original Message- From: Tom Thomas [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 06, 2000 11:44 AM To: Mark; [EMAIL PROTECTED] Subject: RE: HSRP Question It will not work :-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mark Sent: Tuesday, June 06, 2000 12:19 PM To: [EMAIL PROTECTED] Subject: HSRP Question When configuring HSRP, Cisco gives the example of: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby 1 ip 1.0.0.4 standby 1 preempt standby 1 priority 110 standby authentication microdot The question is: If the group number ie; standby "1", is not included such as the following, what happens? Example: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby ip 1.0.0.4 standby preempt standby priority 110 standby authentication microdot Thanks, Mark ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP Question
SO are we saying that if we have two routers setup the same way defaulting to standby "0", Then when one drops the other will take over? I guess another way of saying it is, the two routers are defaulting to "0" and they will automatically become the backup for each otherI think this is incorrect but let me know. Thanks, Mark Brian Sickles [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... I respectfully disagree... I believe the default HSRP group of 0 (zero) will be invoked. It would only not work if the other HSRP participants were configured to use group 1. This is a common config mistake, where specific groups are created (say, to permit identification of unique HSRP participants via the HSRP MAC address that would be created), and you omit the group number on one or more of the commands. But in the provided example, standby group 0 is created, with HSRP MAC address of 00-00-0c-07- ac-00 being mapped to IP address 1.0.0.4 by the active router. Brian W. Sickles, CCIE #2534 Senior Network Architect TimeBridge Technologies 700 East Gate Drive, Suite 240 Mount Laurel, NJ 08054 (856) 778-8000 x-13 (856) 642-2988 FAX It will not work :-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mark Sent: Tuesday, June 06, 2000 12:19 PM To: [EMAIL PROTECTED] Subject: HSRP Question When configuring HSRP, Cisco gives the example of: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby 1 ip 1.0.0.4 standby 1 preempt standby 1 priority 110 standby authentication microdot The question is: If the group number ie; standby "1", is not included such as the following, what happens? Example: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby ip 1.0.0.4 standby preempt standby priority 110 standby authentication microdot Thanks, Mark ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] --- ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP Question
Okay you all are correct and I was not clear enough. On 11.0 it does not work on everything later it does work as Edgar described (invoking default group 0) as shown below. interface Ethernet0 ip address 1.0.0.1 255.0.0.0 no ip redirects no ip route-cache no ip mroute-cache standby priority 110 standby preempt standby authentication microdot standby ip 1.0.0.2 ROUTER1#sh standby ethernet 0 Ethernet0 - Group 0 Local state is Init, priority 110, may preempt Hellotime 0 holdtime 0 Hot standby IP address is 10.1.1.1 configured Active router is unknown expired Standby router is unknown expired Standby virtual mac address is .0c07.ac00 Now can I finish my lunch? -Original Message- From: McMasters, Eric [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 06, 2000 1:51 PM To: 'Tom Thomas'; Mark; [EMAIL PROTECTED] Subject: RE: HSRP Question My interpretation of the examples that are presented are that the first configuration will work, but will the second. Now, I am by no means an expert, but I found in my handy dandy "Internetwork Troubleshooting Handbook" where their example does not include the standby group number. I also read that by not using a group number (ie 1, in this case) the standby group would default to "0", and it would work. Could somebody please verify this for me, because I would hate to propogate incorrect information. Thanks. Eric L. McMasters, CCNP/CCDA OSSN - Sr. Network Engineer Phone:913.859.1986 PCS:913.485.9734 Fax: 913.859.1234 -Original Message- From: Tom Thomas [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 06, 2000 11:44 AM To: Mark; [EMAIL PROTECTED] Subject: RE: HSRP Question It will not work :-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mark Sent: Tuesday, June 06, 2000 12:19 PM To: [EMAIL PROTECTED] Subject: HSRP Question When configuring HSRP, Cisco gives the example of: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby 1 ip 1.0.0.4 standby 1 preempt standby 1 priority 110 standby authentication microdot The question is: If the group number ie; standby "1", is not included such as the following, what happens? Example: interface ethernet 0 ip address 1.0.0.1 255.0.0.0 standby ip 1.0.0.4 standby preempt standby priority 110 standby authentication microdot Thanks, Mark ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP Question
You need the group number. mms -Original Message- mms From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of mms Mark mms Sent: Tuesday, June 06, 2000 9:19 AM mms To: [EMAIL PROTECTED] mms Subject: HSRP Question mms mms mms When configuring HSRP, Cisco gives the example of: mms mms interface ethernet 0 mms ip address 1.0.0.1 255.0.0.0 mms standby 1 ip 1.0.0.4 mms standby 1 preempt mms standby 1 priority 110 mms standby authentication microdot mms mms The question is: mms mms If the group number ie; standby "1", is not included such as mms the following, mms what happens? mms mms Example: mms mms interface ethernet 0 mms ip address 1.0.0.1 255.0.0.0 mms standby ip 1.0.0.4 mms standby preempt mms standby priority 110 mms standby authentication microdot mms mms mms Thanks, mms Mark mms mms mms ___ mms UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html mms FAQ, list archives, and subscription info: http://www.groupstudy.com mms Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] mms ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP question
You need a unique address on each router, and another unique address shared between routers for the standby ip. In total 3 addresses. It would be a good idea to look at the below documentation before implementing this configuration. Tracking interfaces or doing load sharing may be beneficial depending on the whole configuration of your network: http://www.cisco.com/cpress/cc/td/cpress/ccie/ndcs798/nd2022.htm Mary Smith wrote: I have 2 routers . Router B is set up for Hot Standby Router A is 2524, Router B is 2620: Router A configuration: . . int e0 ip address 209.49.216.241 255.255.255.248 standby 1 ip 209.49.216.245 standby 1 preempt standby 1 priority 110 no ip directed-broadcast ! int s0 ip address 206.181.61.66 255.255.255.252 encapsulation ppp no fair-queue . . . Roouter B configuration: . . int f0/0 ip address 209.49.216.245 255.255.255.248 standby 1 ip standby 1 preempt no ip directed-broadcast ! int s0/0 ip address 206.181.61.66 255.255.255.252 encapsulation ppp no fair-queue . . My questions are: (1). Is the above configuration correct ? (2). If router A go down, router B should up instantly ? (3). Can I use sam serial ip address on both router ? Thanks ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: HSRP question
Mary, Here is a correct HSRP config Router A interface FastEthernet2/0 ip address 10.10.52.66 255.255.255.240 no ip redirects no ip directed-broadcast standby 17 priority 150 standby 17 preempt standby 17 ip 10.10.52.65 Router B interface FastEthernet2/0 ip address 10.10.52.67 255.255.255.240 no ip redirects no ip directed-broadcast standby 17 priority 200 standby 17 preempt standby 17 ip 10.10.52.65 Hope this helps Nick -Original Message- From: Mary Smith [mailto:[EMAIL PROTECTED]] Sent: Friday, May 26, 2000 3:02 PM To: [EMAIL PROTECTED] Subject: HSRP question I have 2 routers . Router B is set up for Hot Standby Router A is 2524, Router B is 2620: Router A configuration: . . int e0 ip address 209.49.216.241 255.255.255.248 standby 1 ip 209.49.216.245 standby 1 preempt standby 1 priority 110 no ip directed-broadcast ! int s0 ip address 206.181.61.66 255.255.255.252 encapsulation ppp no fair-queue . . . Roouter B configuration: . . int f0/0 ip address 209.49.216.245 255.255.255.248 standby 1 ip standby 1 preempt no ip directed-broadcast ! int s0/0 ip address 206.181.61.66 255.255.255.252 encapsulation ppp no fair-queue . . My questions are: (1). Is the above configuration correct ? (2). If router A go down, router B should up instantly ? (3). Can I use sam serial ip address on both router ? Thanks __ Do You Yahoo!? Kick off your party with Yahoo! Invites. http://invites.yahoo.com/ ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP question
On Fri, 26 May 2000, Mary Smith wrote: I have 2 routers . Router B is set up for Hot Standby Router A is 2524, Router B is 2620: Router A configuration: . . int e0 ip address 209.49.216.241 255.255.255.248 standby 1 ip 209.49.216.245 standby 1 preempt standby 1 priority 110 no ip directed-broadcast ! int s0 ip address 206.181.61.66 255.255.255.252 encapsulation ppp no fair-queue . . . Roouter B configuration: . . int f0/0 ip address 209.49.216.245 255.255.255.248 standby 1 ip standby 1 preempt no ip directed-broadcast ! int s0/0 ip address 206.181.61.66 255.255.255.252 encapsulation ppp no fair-queue . . My questions are: (1). Is the above configuration correct ? No. Router B needs an interface IP address different from the standby. (2). If router A go down, router B should up instantly ? No. Even if the config were correct, there is a delay on the order of a few seconds which is configurable. (3). Can I use sam serial ip address on both router ? Mmmm... Probably not, depending on the rest of your network. On the ethernet side, you need three ip addresses within the same subnet. The virtual address is configured on at least one router with the configuration line "standby 1 ip 209.49.216.245". This will be the IP address assumed by the active router, and will be used as the HSRP group's IP address for routing purposes. Each router must also have its own unique IP address. Your router B should look like: int f0/0 ip address 209.49.216.242 255.255.255.248 standby 1 ip 209.49.216.245 this line is optional but helps to debug standby 1 preempt no ip directed-broadcast (assuming that you don't have another .242 on the network...) On the serial side, you probably should not be using the same IP address on both routers, as they'll be going to different networks. Think of HSRP as an extension of the redundancy of two serial lines. Say you have two locations linked by a serial line. This has no redundancy. If the serial line fails, the network goes down. So to add redundancy a second serial line is added between the locations, and it goes to a second serial port on the same router at each end. Most protocols will happily load-balance across multiple equal-cost paths so you now have redundancy as well as extra capacity. The redundancy in case of a failure of one line limits the capacity to that of the remaining working line, however. This protects against the failre of the line, but not the failure of the router hardware. Enter HSRP. You provide an additional router and configure HSRP, connecting one serial line to each router. On the ethernet side, the LAN uses the "virtual address" which can be assumed by either router based on priority. Ideally, HSRP is also used on the other end of the serial lines, or the remainder of the WAN is such that redundancy is achieved by other means. Of course for the truly paranoid (or robust), the ethernet side needs to go to multiple switches with fast etherchannel between them in case a switch fails, redundant servers are behind Local Director failover pairs, and the whole thing is run from two different power supplies. There's a nice writeup on HSRP in the documentation. http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/cs009.htm -- Jay Hennigan - Network Administration - [EMAIL PROTECTED] NetLojix Communications, Inc. NASDAQ: NETX - http://www.netlojix.com/ WestNet: Connecting you to the planet. 805 884-6323 ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP question
Why would you have both Routers as "Preempt"? I thought that only the primary should have this command so that it would become the primary after coming back on line. Chris ""Hughes, Nicholas"" [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Mary, Here is a correct HSRP config Router A interface FastEthernet2/0 ip address 10.10.52.66 255.255.255.240 no ip redirects no ip directed-broadcast standby 17 priority 150 standby 17 preempt standby 17 ip 10.10.52.65 Router B interface FastEthernet2/0 ip address 10.10.52.67 255.255.255.240 no ip redirects no ip directed-broadcast standby 17 priority 200 standby 17 preempt standby 17 ip 10.10.52.65 Hope this helps Nick -Original Message- From: Mary Smith [mailto:[EMAIL PROTECTED]] Sent: Friday, May 26, 2000 3:02 PM To: [EMAIL PROTECTED] Subject: HSRP question I have 2 routers . Router B is set up for Hot Standby Router A is 2524, Router B is 2620: Router A configuration: . . int e0 ip address 209.49.216.241 255.255.255.248 standby 1 ip 209.49.216.245 standby 1 preempt standby 1 priority 110 no ip directed-broadcast ! int s0 ip address 206.181.61.66 255.255.255.252 encapsulation ppp no fair-queue . . . Roouter B configuration: . . int f0/0 ip address 209.49.216.245 255.255.255.248 standby 1 ip standby 1 preempt no ip directed-broadcast ! int s0/0 ip address 206.181.61.66 255.255.255.252 encapsulation ppp no fair-queue . . My questions are: (1). Is the above configuration correct ? (2). If router A go down, router B should up instantly ? (3). Can I use sam serial ip address on both router ? Thanks __ Do You Yahoo!? Kick off your party with Yahoo! Invites. http://invites.yahoo.com/ ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] --- ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: HSRP question
From Cisco IOS Software command summary: The router is configured to preempt, which means that when the local router has a Hot Standby priority higher than the current active router, the local router should attempt to assume control as the active router. If preempt is not configured, the local router assumes control as the active router only if it receives info indicating that there is no router currently in the active state(acting as the designated router). ex. If priority 50 router does not get notified by Active priority 150 router (link between the 2 routers cut or complete power failure) the non-active priority 50 router does not become active and your HSRP implementation worthless and/or your job. Tom Trygar Chris Gore wrote: Why would you have both Routers as "Preempt"? I thought that only the primary should have this command so that it would become the primary after coming back on line. Chris ""Hughes, Nicholas"" [EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Mary, > > Here is a correct HSRP config > > > Router A > > interface FastEthernet2/0 > ip address 10.10.52.66 255.255.255.240 > no ip redirects > no ip directed-broadcast > standby 17 priority 150 > standby 17 preempt > standby 17 ip 10.10.52.65 > > Router B > > interface FastEthernet2/0 > ip address 10.10.52.67 255.255.255.240 > no ip redirects > no ip directed-broadcast > standby 17 priority 200 > standby 17 preempt > standby 17 ip 10.10.52.65 > > > Hope this helps > > Nick > > > > -Original Message- > From: Mary Smith [mailto:[EMAIL PROTECTED]] > Sent: Friday, May 26, 2000 3:02 PM > To: [EMAIL PROTECTED] > Subject: HSRP question > > > I have 2 routers . Router B is set up for Hot Standby > Router A is 2524, Router B is 2620: > > Router A configuration: > . > . > int e0 > ip address 209.49.216.241 255.255.255.248 > standby 1 ip 209.49.216.245 > standby 1 preempt > standby 1 priority 110 > no ip directed-broadcast > ! > int s0 > ip address 206.181.61.66 255.255.255.252 > encapsulation ppp > no fair-queue > . > . > . > > > Roouter B configuration: > > . > . > int f0/0 > ip address 209.49.216.245 255.255.255.248 > standby 1 ip > standby 1 preempt > no ip directed-broadcast > ! > int s0/0 > ip address 206.181.61.66 255.255.255.252 > encapsulation ppp > no fair-queue > . > . > > My questions are: > (1). Is the above configuration correct ? > (2). If router A go down, router B should up instantly > ? > (3). Can I use sam serial ip address on both router ? > > Thanks > > __ > Do You Yahoo!? > Kick off your party with Yahoo! Invites. > http://invites.yahoo.com/ > > ___ > UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html > FAQ, list archives, and subscription info: http://www.groupstudy.com > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > ___ > UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html > FAQ, list archives, and subscription info: http://www.groupstudy.com > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > --- > ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
HSRP Question
My understanding is that HSRP creates a "Phantom" router with a Phantom IP address and a Phantom MAC address (Internetworking Handbook). I'm ok with the IP address, that is software. My confusion comes from it being able to make up a MAC address arbitrarily without stepping on any existing IEEE issued toes. Thanks John L. Mairs = John L. Mairs __ Do You Yahoo!? Send instant messages get email alerts with Yahoo! Messenger. http://im.yahoo.com/ ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
