TWO ISP AND ONE FAILURE [7:36371]
Hello i have a frecuent porblem with one of my isp, i have two cisco routers and each one to different isp. Frequentily i have to change the gateway of one of my servers, because one isp is failure. I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could do the change automatically to the other active isp. It happening me right now. And when i have to do that i have to reset one of my servers.. :S. Is a costs operatrion its a mail server. So if somebody knows how to resolve between routers with different isp each one, how to route accross the other good gateway. Thnx in advance Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36371&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
Depends alot on what kind of connection you want. If you are just talking about outbound access from your site, that isn't a problem. Setup the two routers on the same subnet and use HSRP. Best practive would be to set up two HSRP address; each router will be primarary for one address and backup for the other. That way you can direct traffic over a specific connection when it's all up, but traffic will failover to one connection if the other goes down. If, on the other hand, you want to maintain public services during an outage (ie, web pages, FTP sites, incoming e-mail), that is a gorilla of a completly different color. If you're site is big enough, you could justify a /19 public address, which can be routed via BGP. That would solve alot of you're problems, but it's unlikely that you'd be asking the question if you had a /19. Some protocols will allow you to specifiy a backup via DNS (I'm thinking SMTP), but that only helps with mail. Otherwise, you're options are co-locateing the equipment you always want available, or switching both your WAN connections to the same ISP. THere is no really easy solution. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36374&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: TWO ISP AND ONE FAILURE [7:36371]
You would want to use both HSRP and BGP in this case. HSRP will solve the problem of changing the default gateway on the clients when a link fails. BGP will be used for fault tolerance at the ISP side. Here is a sample doc I got form the cisco site: http://www.v-man.net/support/pdf/hsrp_bgp.pdf ""Yassel Omar Izquierdo Souchay"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hello i have a frecuent porblem with one of my isp, i have two cisco routers > and each one to different isp. Frequentily i have to change the gateway of > one of my servers, because one isp is failure. > I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could > do the change automatically to the other active isp. > It happening me right now. And when i have to do that i have to reset one of > my servers.. :S. Is a costs operatrion its a mail server. > So if somebody knows how to resolve between routers with different isp each > one, how to route accross the other good gateway. > > Thnx in advance > Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36375&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: TWO ISP AND ONE FAILURE [7:36371]
For the outbound connectivity, use the HSRP track feature. That "watches" an interface (the WAN link to your ISP). If that interface goes down, the HSRP priority of that router gets reduced, making the other router (with the good ISP link) the HSRP primary. HSRP will make it so no changes are required at your server. As mentioned if you have Internet facing servers (mail server, web server), you really need BGP. However many ISPs will now accept advertisements as small as /24. So if you have a class C of registered addresses (or if you can get that) you can advertise it to both ISPs via BGP (even if it was assigned to you by one of the ISPs). Rob. CCIE 6922 ""Chris Charlebois"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Depends alot on what kind of connection you want. If you are just talking > about outbound access from your site, that isn't a problem. Setup the two > routers on the same subnet and use HSRP. Best practive would be to set up > two HSRP address; each router will be primarary for one address and backup > for the other. That way you can direct traffic over a specific connection > when it's all up, but traffic will failover to one connection if the other > goes down. > > If, on the other hand, you want to maintain public services during an outage > (ie, web pages, FTP sites, incoming e-mail), that is a gorilla of a > completly different color. If you're site is big enough, you could justify > a /19 public address, which can be routed via BGP. That would solve alot of > you're problems, but it's unlikely that you'd be asking the question if you > had a /19. Some protocols will allow you to specifiy a backup via DNS (I'm > thinking SMTP), but that only helps with mail. Otherwise, you're options > are co-locateing the equipment you always want available, or switching both > your WAN connections to the same ISP. THere is no really easy solution. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36378&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: TWO ISP AND ONE FAILURE [7:36371]
chances are bgp will not be availablefirst..he has to have the address
space...second...if he didn't plan for it before hand, he's probably got a
couple'a 2500's or 2600's Try running bgp on a 2500. (unless of
course he uses the same isp for both connections and they work with him on
setting up redundancy) But at that point he still would not have his own
asn for bgp...
-Patrick
>>> "sam sneed" 02/25/02 10:46AM >>>
You would want to use both HSRP and BGP in this case. HSRP will solve the
problem of changing the default gateway on the clients when a link fails.
BGP will be used for fault tolerance at the ISP side. Here is a sample doc I
got form the cisco site:
http://www.v-man.net/support/pdf/hsrp_bgp.pdf
""Yassel Omar Izquierdo Souchay"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hello i have a frecuent porblem with one of my isp, i have two cisco
routers
> and each one to different isp. Frequentily i have to change the gateway of
> one of my servers, because one isp is failure.
> I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i
could
> do the change automatically to the other active isp.
> It happening me right now. And when i have to do that i have to reset one
of
> my servers.. :S. Is a costs operatrion its a mail server.
> So if somebody knows how to resolve between routers with different isp
each
> one, how to route accross the other good gateway.
>
> Thnx in advance
> Yassl
> Confidentiality Disclaimer
This email and any files transmitted with it may contain confidential and
/or proprietary information in the possession of WellStar Health System,
Inc. ("WellStar") and is intended only for the individual or entity to whom
addressed. This email may contain information that is held to be
privileged, confidential and exempt from disclosure under applicable law. If
the reader of this message is not the intended recipient, you are hereby
notified that any unauthorized access, dissemination, distribution or
copying of any information from this email is strictly prohibited, and may
subject you to criminal and/or civil liability. If you have received this
email in error, please notify the sender by reply email and then delete this
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Re: TWO ISP AND ONE FAILURE [7:36371]
>Hello i have a frecuent porblem with one of my isp, i have two cisco routers >and each one to different isp. Frequentily i have to change the gateway of >one of my servers, because one isp is failure. >I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could >do the change automatically to the other active isp. >It happening me right now. And when i have to do that i have to reset one of >my servers.. :S. Is a costs operatrion its a mail server. >So if somebody knows how to resolve between routers with different isp each >one, how to route accross the other good gateway. > >Thnx in advance >Yassl Can you run HSRP between the two gateways and tell the servers to use the virtual HSRP address as the default gateway? Assuming one router goes to one ISP and the other goes to the other ISP, and the two BGP routers are iBGP connected, it should work -- the server shouldn't care which router it exits. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36382&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
HSRP on the Ethernet Interfaces of your 2 routers. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Yassel Omar Izquierdo Souchay Sent: Monday, February 25, 2002 9:11 AM To: [EMAIL PROTECTED] Subject: TWO ISP AND ONE FAILURE [7:36371] Hello i have a frecuent porblem with one of my isp, i have two cisco routers and each one to different isp. Frequentily i have to change the gateway of one of my servers, because one isp is failure. I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could do the change automatically to the other active isp. It happening me right now. And when i have to do that i have to reset one of my servers.. :S. Is a costs operatrion its a mail server. So if somebody knows how to resolve between routers with different isp each one, how to route accross the other good gateway. Thnx in advance Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36385&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
Hi. To maintain uninterrupted services even if one of your ISP's Fail, you need to run BGP. I created a "basics of BGP" document on [EMAIL PROTECTED], and I'm posting it here. I am a consultant looking for work, if you decide to implement BGP, I would like to help. ---Begin crosspost--- 1. Talk to your ISP's and see if they will let you peer with them. This isn't a question that the average helpdesk person is going to be able to answer, so you may have to work your way up the food chain. If the answer is no, then select a new ISP. 2. Apply for a Autonomous Sytem Number from Arin. This Requires ARIN membership ($500 one-time, $30 annual). If you are not in the continental US, substitute RIPE or APNIC for ARIN. 3. Acquire a minimum of a /24 (256 Ip's) from at least one of your ISP's. 4. Acquire the following information from each of your ISP's. 4a. Ip Address of the Peer 4b. AS# of the peer 4c. Authentiaction (if any) 5. Provide each of your ISP's with the following info.\ 5a. Your Peer IP address 5b. Your AS# 5c. Authentication (if any, not reccomended) 5d. The Subnets you will be advertising (Some ISP's filter the incoming advertisements. Why? Lookup "Blackhole-ing".) 6. Configure BGP on your router. (Imho, preferably cisco.) 6a. Assuming you want to do load balancing, (as best as possible) 6a1. If you have less than 32 mb of Ram, then accept only each providers default route. 6a2. If you have less than 64 mb of Ram, then accept routes from each provider with a as-path of 1 hop or less and each providers default route. 6a3. If you have more than 64mb of Ram, Accept Full routes from each provider and let the router select the shortest AS-path. Monitor your memory usage and maintain at least 12 mb free at any given time. 6b.If you have a primary and a secondary link, and want to prefer one over the other, or want more control over traffic entering and exiting, then use one of the following stratigies. 6b1. As-Prepend to cause the internet to prefer one link or the other 6b2. Set the (Cisco Specific) weight on the preferred link 6b3. Filter to accept summary routes only from one provider 6b3. Use BGP's metrics to reccomend preferences to your ISP's It Seems like a lot, but really it's not that bad. If anyone needs help with this, E-mail me off list. The ISP I work for is expiring and I will be glad to help you out. (As an advisor (free advice), or as a contractor(Price varies from negotiable to negligible.)) Thanks, Ejay Hire [EMAIL PROTECTED] 434-591-4564 ... Have router will travel! ---End Crosspost-- -Ejay Hire [EMAIL PROTECTED] 434-591-4564 -Original Message- From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 10:11 AM To: [EMAIL PROTECTED] Subject: TWO ISP AND ONE FAILURE [7:36371] Hello i have a frecuent porblem with one of my isp, i have two cisco routers and each one to different isp. Frequentily i have to change the gateway of one of my servers, because one isp is failure. I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could do the change automatically to the other active isp. It happening me right now. And when i have to do that i have to reset one of my servers.. :S. Is a costs operatrion its a mail server. So if somebody knows how to resolve between routers with different isp each one, how to route accross the other good gateway. Thnx in advance Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36387&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: TWO ISP AND ONE FAILURE [7:36371]
HSRP-Hot Standby Router Protocol would be your best bet, BGP might come into play but it require more complications and coorperations from your both upstream providers(ISPs). However with HSRP configured on both routers: Use the Config below as a guide: FOR ROUTER1 to ISP 1 (Include all DNS, default gateways and specific parameters pointing to ISP1's networt here) int serial 0 ip address n.n.n.n n.n.n.n (ISP1's serial interface IP address) interface Ethernet1 ip address x.x.x.x x.x.x.x (inside network) standby priority 105 standby preempt standby ip x.x.x.x+z (where z can be a +ve or -ve number, just a free IP address) standby track Serial0 FOR ROUTER2 to ISP 2 (Include all DNS, default gateways and specific parameters pointing to ISP2's networt here) interface serial 0 ip address k.k.k.k k.k.k.k (ISP2's serial interface IP address) interface Ethernet1 ip address p.p.p.p p.p.p.p (Inside Network) standby priority 100 standby ip x.x.x.x+z (where z can be a +ve or -ve number, just a free IP address) NOTE: Set your inside server's gateway address to x.x.x.x+z .Router2 above will be the active router thus the router to ISP1.However if ISP one becomes unavailable, its priority will be reduced from 105 making router two to become the active router. Because of the preempt command Router1 resumes its active role whenever it become available again and router2 would then revert back to be the standy router. I guess this might help you, you can check Cisco site for more information. (http://www.cisco.com/warp/public/459/hsrp_bgp.html) Enjoy Godswill Oletu CSS1,CCDP,CCNP. - Original Message - From: Yassel Omar Izquierdo Souchay To: Sent: Monday, February 25, 2002 7:10 AM Subject: TWO ISP AND ONE FAILURE [7:36371] > Hello i have a frecuent porblem with one of my isp, i have two cisco routers > and each one to different isp. Frequentily i have to change the gateway of > one of my servers, because one isp is failure. > I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could > do the change automatically to the other active isp. > It happening me right now. And when i have to do that i have to reset one of > my servers.. :S. Is a costs operatrion its a mail server. > So if somebody knows how to resolve between routers with different isp each > one, how to route accross the other good gateway. > > Thnx in advance > Yassl _ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36388&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
Run HSRP between the two cisco routers and then point your default gateway to the VIP address. Daniel Ladrach CCNA, CCNP WorldCom -Original Message- From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 10:11 AM To: [EMAIL PROTECTED] Subject: TWO ISP AND ONE FAILURE [7:36371] Hello i have a frecuent porblem with one of my isp, i have two cisco routers and each one to different isp. Frequentily i have to change the gateway of one of my servers, because one isp is failure. I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could do the change automatically to the other active isp. It happening me right now. And when i have to do that i have to reset one of my servers.. :S. Is a costs operatrion its a mail server. So if somebody knows how to resolve between routers with different isp each one, how to route accross the other good gateway. Thnx in advance Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36389&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
Come on guys, Think about it for a minute. Do you really think the router is failing, or is his downtime caused by the wan link? HSRP won't significantly increase your uptime if the wan link is failing and he has to manually change his server's IP/default gateway to switch to the other link. A diferent way to think of it... If you had a car with no brakes and a broken tail-light, which would you fix first? -Ejay -Original Message- From: Ladrach, Daniel E. [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 11:48 AM To: [EMAIL PROTECTED] Subject: RE: TWO ISP AND ONE FAILURE [7:36371] Run HSRP between the two cisco routers and then point your default gateway to the VIP address. Daniel Ladrach CCNA, CCNP WorldCom -Original Message- From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 10:11 AM To: [EMAIL PROTECTED] Subject: TWO ISP AND ONE FAILURE [7:36371] Hello i have a frecuent porblem with one of my isp, i have two cisco routers and each one to different isp. Frequentily i have to change the gateway of one of my servers, because one isp is failure. I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could do the change automatically to the other active isp. It happening me right now. And when i have to do that i have to reset one of my servers.. :S. Is a costs operatrion its a mail server. So if somebody knows how to resolve between routers with different isp each one, how to route accross the other good gateway. Thnx in advance Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36406&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
Do not say that a 2500 will not work for BGP. It will work just fine for a
default-only or partial-routes setup, and I'm sure more than one member of
this group has set it up.
-ejay
-Original Message-
From: Patrick Ramsey [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 25, 2002 11:05 AM
To: [EMAIL PROTECTED]
Subject: Re: TWO ISP AND ONE FAILURE [7:36371]
chances are bgp will not be availablefirst..he has to have the address
space...second...if he didn't plan for it before hand, he's probably got a
couple'a 2500's or 2600's Try running bgp on a 2500. (unless of
course he uses the same isp for both connections and they work with him on
setting up redundancy) But at that point he still would not have his own
asn for bgp...
-Patrick
>>> "sam sneed" 02/25/02 10:46AM >>>
You would want to use both HSRP and BGP in this case. HSRP will solve the
problem of changing the default gateway on the clients when a link fails.
BGP will be used for fault tolerance at the ISP side. Here is a sample doc I
got form the cisco site:
http://www.v-man.net/support/pdf/hsrp_bgp.pdf
""Yassel Omar Izquierdo Souchay"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hello i have a frecuent porblem with one of my isp, i have two cisco
routers
> and each one to different isp. Frequentily i have to change the gateway of
> one of my servers, because one isp is failure.
> I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i
could
> do the change automatically to the other active isp.
> It happening me right now. And when i have to do that i have to reset one
of
> my servers.. :S. Is a costs operatrion its a mail server.
> So if somebody knows how to resolve between routers with different isp
each
> one, how to route accross the other good gateway.
>
> Thnx in advance
> Yassl
>>>>>>>>>>>>> Confidentiality Disclaimer <<<<<<<<<<<<<<<<
This email and any files transmitted with it may contain confidential and
/or proprietary information in the possession of WellStar Health System,
Inc. ("WellStar") and is intended only for the individual or entity to whom
addressed. This email may contain information that is held to be
privileged, confidential and exempt from disclosure under applicable law. If
the reader of this message is not the intended recipient, you are hereby
notified that any unauthorized access, dissemination, distribution or
copying of any information from this email is strictly prohibited, and may
subject you to criminal and/or civil liability. If you have received this
email in error, please notify the sender by reply email and then delete this
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Message Posted at:
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RE: TWO ISP AND ONE FAILURE [7:36371]
2500 is BGP king
-Original Message-
From: Hire, Ejay [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 25, 2002 1:27 PM
To: [EMAIL PROTECTED]
Subject: RE: TWO ISP AND ONE FAILURE [7:36371]
Do not say that a 2500 will not work for BGP. It will work just fine for a
default-only or partial-routes setup, and I'm sure more than one member of
this group has set it up.
-ejay
-Original Message-
From: Patrick Ramsey [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 25, 2002 11:05 AM
To: [EMAIL PROTECTED]
Subject: Re: TWO ISP AND ONE FAILURE [7:36371]
chances are bgp will not be availablefirst..he has to have the address
space...second...if he didn't plan for it before hand, he's probably got a
couple'a 2500's or 2600's Try running bgp on a 2500. (unless of
course he uses the same isp for both connections and they work with him on
setting up redundancy) But at that point he still would not have his own
asn for bgp...
-Patrick
>>> "sam sneed" 02/25/02 10:46AM >>>
You would want to use both HSRP and BGP in this case. HSRP will solve the
problem of changing the default gateway on the clients when a link fails.
BGP will be used for fault tolerance at the ISP side. Here is a sample doc I
got form the cisco site:
http://www.v-man.net/support/pdf/hsrp_bgp.pdf
""Yassel Omar Izquierdo Souchay"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hello i have a frecuent porblem with one of my isp, i have two cisco
routers
> and each one to different isp. Frequentily i have to change the gateway of
> one of my servers, because one isp is failure.
> I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i
could
> do the change automatically to the other active isp.
> It happening me right now. And when i have to do that i have to reset one
of
> my servers.. :S. Is a costs operatrion its a mail server.
> So if somebody knows how to resolve between routers with different isp
each
> one, how to route accross the other good gateway.
>
> Thnx in advance
> Yassl
>>>>>>>>>>>>> Confidentiality Disclaimer <<<<<<<<<<<<<<<<
This email and any files transmitted with it may contain confidential and
/or proprietary information in the possession of WellStar Health System,
Inc. ("WellStar") and is intended only for the individual or entity to whom
addressed. This email may contain information that is held to be
privileged, confidential and exempt from disclosure under applicable law. If
the reader of this message is not the intended recipient, you are hereby
notified that any unauthorized access, dissemination, distribution or
copying of any information from this email is strictly prohibited, and may
subject you to criminal and/or civil liability. If you have received this
email in error, please notify the sender by reply email and then delete this
email and its attachments from your computer. Thank you.
Message Posted at:
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RE: TWO ISP AND ONE FAILURE [7:36371]
Come on Track the Serial interface! Basic HSRP! Daniel Ladrach CCNA, CCNP WorldCom -Original Message- From: Hire, Ejay [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 1:20 PM To: 'Ladrach, Daniel E.'; [EMAIL PROTECTED] Subject: RE: TWO ISP AND ONE FAILURE [7:36371] Come on guys, Think about it for a minute. Do you really think the router is failing, or is his downtime caused by the wan link? HSRP won't significantly increase your uptime if the wan link is failing and he has to manually change his server's IP/default gateway to switch to the other link. A diferent way to think of it... If you had a car with no brakes and a broken tail-light, which would you fix first? -Ejay -Original Message- From: Ladrach, Daniel E. [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 11:48 AM To: [EMAIL PROTECTED] Subject: RE: TWO ISP AND ONE FAILURE [7:36371] Run HSRP between the two cisco routers and then point your default gateway to the VIP address. Daniel Ladrach CCNA, CCNP WorldCom -Original Message- From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 10:11 AM To: [EMAIL PROTECTED] Subject: TWO ISP AND ONE FAILURE [7:36371] Hello i have a frecuent porblem with one of my isp, i have two cisco routers and each one to different isp. Frequentily i have to change the gateway of one of my servers, because one isp is failure. I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could do the change automatically to the other active isp. It happening me right now. And when i have to do that i have to reset one of my servers.. :S. Is a costs operatrion its a mail server. So if somebody knows how to resolve between routers with different isp each one, how to route accross the other good gateway. Thnx in advance Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36422&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
I'm not sure I understand your point. Assume the following topology: [R1] [R2] || || \--/ | [HOST] The two border routers are R1 and R2 and each have a connection to an ISP. HSRP is configured to track the WAN link. The default gateway on the host is the HSRP standby ip address. If either WAN link goes down, the relevant router--because it is tracking the WAN link--will notify the other router that it is no longer eligible and the other router will take over. Why are you saying that the perceived uptime to the host would not increase using this method? As I see it, unless both links go down, the downtime would be quite minimal. Thanks, John >>> "Hire, Ejay" 2/25/02 11:24:23 AM >>> Come on guys, Think about it for a minute. Do you really think the router is failing, or is his downtime caused by the wan link? HSRP won't significantly increase your uptime if the wan link is failing and he has to manually change his server's IP/default gateway to switch to the other link. A diferent way to think of it... If you had a car with no brakes and a broken tail-light, which would you fix first? -Ejay -Original Message- From: Ladrach, Daniel E. [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 11:48 AM To: [EMAIL PROTECTED] Subject: RE: TWO ISP AND ONE FAILURE [7:36371] Run HSRP between the two cisco routers and then point your default gateway to the VIP address. Daniel Ladrach CCNA, CCNP WorldCom -Original Message- From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 10:11 AM To: [EMAIL PROTECTED] Subject: TWO ISP AND ONE FAILURE [7:36371] Hello i have a frecuent porblem with one of my isp, i have two cisco routers and each one to different isp. Frequentily i have to change the gateway of one of my servers, because one isp is failure. I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could do the change automatically to the other active isp. It happening me right now. And when i have to do that i have to reset one of my servers.. :S. Is a costs operatrion its a mail server. So if somebody knows how to resolve between routers with different isp each one, how to route accross the other good gateway. Thnx in advance Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36425&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
Because R1 and R2 are not connected to the same ISP, he has to change his IP address to use the other connection. (because he isn't using BGP to announce his netblock reachable through both connections). HSRP can't change his IP. I've been thinking about it, and there is a (scrapped together junkyard-wars) way to make this work. You can HSRP the two routers and have the backup router NAT the other ISP's IP to a Ip that is valid for it's connection. This is a ugly solution, and only works for SMTP incoming mail transfers from other servers. (because of DNS's MX record priority feature). Another strike against it is if one of the links fails, all of the SMTP sessions in Progress will drop, and the remote (sending) mail server will have to re-initiate. ... Isp1 - Ip Range 1.1.1.0/28 (0-15) Isp2 - Ip Range 2.2.2.0/28 (0-15) Mail server is configured for the ip of 1.1.1.2, with a default Gateway of 1.1.1.1 Both routers are a member of an HSRP group and listen on 1.1.1.1 R1 is the HSRP primary, tracks the serial link, and preempts. R2 is the HSRP backup, and preempts if r1's serial link fails. R2's ethernet interface is IP nat inside, and the t1 interface is ip nat outside. R2 has a single static nat entry that translates 1.1.1.2 to 2.2.2.2.. ip nat inside source static 1.1.1.2 2.2.2.2 The DNS records are configured as follows domain.com. MX 10 1.1.1.2 domain.com. MX 20 2.2.2.2 Now, Looking at all of the above and understanding that this doesn't fix clients trying to connect to the server with POP3 or SMTP directly from outlook or eudora... Do you think this is a good solution? ... (no) BGP is the right answer to this customers needs. Sadly, I know someone is going to look at this and start pushing it to customers as a solution. -Ejay -Original Message- From: John Neiberger [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 2:51 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: TWO ISP AND ONE FAILURE [7:36371] I'm not sure I understand your point. Assume the following topology: [R1] [R2] || || \--/ | [HOST] The two border routers are R1 and R2 and each have a connection to an ISP. HSRP is configured to track the WAN link. The default gateway on the host is the HSRP standby ip address. If either WAN link goes down, the relevant router--because it is tracking the WAN link--will notify the other router that it is no longer eligible and the other router will take over. Why are you saying that the perceived uptime to the host would not increase using this method? As I see it, unless both links go down, the downtime would be quite minimal. Thanks, John >>> "Hire, Ejay" 2/25/02 11:24:23 AM >>> Come on guys, Think about it for a minute. Do you really think the router is failing, or is his downtime caused by the wan link? HSRP won't significantly increase your uptime if the wan link is failing and he has to manually change his server's IP/default gateway to switch to the other link. A diferent way to think of it... If you had a car with no brakes and a broken tail-light, which would you fix first? -Ejay -Original Message- From: Ladrach, Daniel E. [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 11:48 AM To: [EMAIL PROTECTED] Subject: RE: TWO ISP AND ONE FAILURE [7:36371] Run HSRP between the two cisco routers and then point your default gateway to the VIP address. Daniel Ladrach CCNA, CCNP WorldCom -Original Message- From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 10:11 AM To: [EMAIL PROTECTED] Subject: TWO ISP AND ONE FAILURE [7:36371] Hello i have a frecuent porblem with one of my isp, i have two cisco routers and each one to different isp. Frequentily i have to change the gateway of one of my servers, because one isp is failure. I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could do the change automatically to the other active isp. It happening me right now. And when i have to do that i have to reset one of my servers.. :S. Is a costs operatrion its a mail server. So if somebody knows how to resolve between routers with different isp each one, how to route accross the other good gateway. Thnx in advance Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36428&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: TWO ISP AND ONE FAILURE [7:36371]
I agree that this configuration - with HSRP and tracking - could work well for connections that are initiaed outbound. You would not necessarily need BGP. R1 could do an outbound NAT to whatever IP address space had been assigned by ISP 1. R2 could do an outbound NAT to whatever IP address space had been assigned by ISP 2. The return traffic would use the correct ISP based on that address space - without any BGP. However if you do need inbound connections - and chances are you do, BGP is the most realistic way to do it. BGP on 2500's is fine. If you are only taking the default route its probably easier on the box than running OSPF. Rob. ""John Neiberger"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > I'm not sure I understand your point. Assume the following topology: > > [R1] [R2] >|| >|| >\--/ > | > [HOST] > > The two border routers are R1 and R2 and each have a connection to an > ISP. HSRP is configured to track the WAN link. The default gateway on > the host is the HSRP standby ip address. If either WAN link goes down, > the relevant router--because it is tracking the WAN link--will notify > the other router that it is no longer eligible and the other router will > take over. > > Why are you saying that the perceived uptime to the host would not > increase using this method? As I see it, unless both links go down, the > downtime would be quite minimal. > > Thanks, > John > > >>> "Hire, Ejay" 2/25/02 11:24:23 AM >>> > Come on guys, Think about it for a minute. Do you really think the > router > is failing, or is his downtime caused by the wan link? HSRP won't > significantly increase your uptime if the wan link is failing and he > has to > manually change his server's IP/default gateway to switch to the other > link. > > A diferent way to think of it... If you had a car with no brakes and > a > broken tail-light, which would you fix first? > > -Ejay > > > -Original Message- > From: Ladrach, Daniel E. [mailto:[EMAIL PROTECTED]] > Sent: Monday, February 25, 2002 11:48 AM > To: [EMAIL PROTECTED] > Subject: RE: TWO ISP AND ONE FAILURE [7:36371] > > > Run HSRP between the two cisco routers and then point your default > gateway > to the VIP address. > > Daniel Ladrach > CCNA, CCNP > WorldCom > > > -Original Message- > From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] > Sent: Monday, February 25, 2002 10:11 AM > To: [EMAIL PROTECTED] > Subject: TWO ISP AND ONE FAILURE [7:36371] > > > Hello i have a frecuent porblem with one of my isp, i have two cisco > routers > and each one to different isp. Frequentily i have to change the gateway > of > one of my servers, because one isp is failure. > I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i > could > do the change automatically to the other active isp. > It happening me right now. And when i have to do that i have to reset > one of > my servers.. :S. Is a costs operatrion its a mail server. > So if somebody knows how to resolve between routers with different isp > each > one, how to route accross the other good gateway. > > Thnx in advance > Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36430&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
Gotcha, I was misunderstanding your point. You do make a good point. I once considered HSRP for something like this but changed my mind for this exact reason. We then thought about buying a device from either FatPipe or Radware, but then we ended up using BGP on all of our border routers instead of on just two of them. John >>> "Hire, Ejay" 2/25/02 1:15:58 PM >>> Because R1 and R2 are not connected to the same ISP, he has to change his IP address to use the other connection. (because he isn't using BGP to announce his netblock reachable through both connections). HSRP can't change his IP. I've been thinking about it, and there is a (scrapped together junkyard-wars) way to make this work. You can HSRP the two routers and have the backup router NAT the other ISP's IP to a Ip that is valid for it's connection. This is a ugly solution, and only works for SMTP incoming mail transfers from other servers. (because of DNS's MX record priority feature). Another strike against it is if one of the links fails, all of the SMTP sessions in Progress will drop, and the remote (sending) mail server will have to re-initiate. ... Isp1 - Ip Range 1.1.1.0/28 (0-15) Isp2 - Ip Range 2.2.2.0/28 (0-15) Mail server is configured for the ip of 1.1.1.2, with a default Gateway of 1.1.1.1 Both routers are a member of an HSRP group and listen on 1.1.1.1 R1 is the HSRP primary, tracks the serial link, and preempts. R2 is the HSRP backup, and preempts if r1's serial link fails. R2's ethernet interface is IP nat inside, and the t1 interface is ip nat outside. R2 has a single static nat entry that translates 1.1.1.2 to 2.2.2.2.. ip nat inside source static 1.1.1.2 2.2.2.2 The DNS records are configured as follows domain.com. MX 10 1.1.1.2 domain.com. MX 20 2.2.2.2 Now, Looking at all of the above and understanding that this doesn't fix clients trying to connect to the server with POP3 or SMTP directly from outlook or eudora... Do you think this is a good solution? ... (no) BGP is the right answer to this customers needs. Sadly, I know someone is going to look at this and start pushing it to customers as a solution. -Ejay -Original Message- From: John Neiberger [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 2:51 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: TWO ISP AND ONE FAILURE [7:36371] I'm not sure I understand your point. Assume the following topology: [R1] [R2] || || \--/ | [HOST] The two border routers are R1 and R2 and each have a connection to an ISP. HSRP is configured to track the WAN link. The default gateway on the host is the HSRP standby ip address. If either WAN link goes down, the relevant router--because it is tracking the WAN link--will notify the other router that it is no longer eligible and the other router will take over. Why are you saying that the perceived uptime to the host would not increase using this method? As I see it, unless both links go down, the downtime would be quite minimal. Thanks, John >>> "Hire, Ejay" 2/25/02 11:24:23 AM >>> Come on guys, Think about it for a minute. Do you really think the router is failing, or is his downtime caused by the wan link? HSRP won't significantly increase your uptime if the wan link is failing and he has to manually change his server's IP/default gateway to switch to the other link. A diferent way to think of it... If you had a car with no brakes and a broken tail-light, which would you fix first? -Ejay -Original Message- From: Ladrach, Daniel E. [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 11:48 AM To: [EMAIL PROTECTED] Subject: RE: TWO ISP AND ONE FAILURE [7:36371] Run HSRP between the two cisco routers and then point your default gateway to the VIP address. Daniel Ladrach CCNA, CCNP WorldCom -Original Message- From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 10:11 AM To: [EMAIL PROTECTED] Subject: TWO ISP AND ONE FAILURE [7:36371] Hello i have a frecuent porblem with one of my isp, i have two cisco routers and each one to different isp. Frequentily i have to change the gateway of one of my servers, because one isp is failure. I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could do the change automatically to the other active isp. It happening me right now. And when i have to do that i have to reset one of my servers.. :S. Is a costs operatrion its a mail server. So if somebody knows how to resolve between routers with different isp each one, how to route accross the other good gateway. Thnx in advance Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36432&t=36371 ---
Re: TWO ISP AND ONE FAILURE [7:36371]
This solution assumes that the subnet is routable by both providers. If this is the case, then HSRP is by far the easiest solution. CM - Original Message - From: "John Neiberger" To: Sent: Monday, February 25, 2002 7:49 PM Subject: RE: TWO ISP AND ONE FAILURE [7:36371] > I'm not sure I understand your point. Assume the following topology: > > [R1] [R2] >|| >|| >\--/ > | > [HOST] > > The two border routers are R1 and R2 and each have a connection to an > ISP. HSRP is configured to track the WAN link. The default gateway on > the host is the HSRP standby ip address. If either WAN link goes down, > the relevant router--because it is tracking the WAN link--will notify > the other router that it is no longer eligible and the other router will > take over. > > Why are you saying that the perceived uptime to the host would not > increase using this method? As I see it, unless both links go down, the > downtime would be quite minimal. > > Thanks, > John > > >>> "Hire, Ejay" 2/25/02 11:24:23 AM >>> > Come on guys, Think about it for a minute. Do you really think the > router > is failing, or is his downtime caused by the wan link? HSRP won't > significantly increase your uptime if the wan link is failing and he > has to > manually change his server's IP/default gateway to switch to the other > link. > > A diferent way to think of it... If you had a car with no brakes and > a > broken tail-light, which would you fix first? > > -Ejay > > > -----Original Message- > From: Ladrach, Daniel E. [mailto:[EMAIL PROTECTED]] > Sent: Monday, February 25, 2002 11:48 AM > To: [EMAIL PROTECTED] > Subject: RE: TWO ISP AND ONE FAILURE [7:36371] > > > Run HSRP between the two cisco routers and then point your default > gateway > to the VIP address. > > Daniel Ladrach > CCNA, CCNP > WorldCom > > > -Original Message- > From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] > Sent: Monday, February 25, 2002 10:11 AM > To: [EMAIL PROTECTED] > Subject: TWO ISP AND ONE FAILURE [7:36371] > > > Hello i have a frecuent porblem with one of my isp, i have two cisco > routers > and each one to different isp. Frequentily i have to change the gateway > of > one of my servers, because one isp is failure. > I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i > could > do the change automatically to the other active isp. > It happening me right now. And when i have to do that i have to reset > one of > my servers.. :S. Is a costs operatrion its a mail server. > So if somebody knows how to resolve between routers with different isp > each > one, how to route accross the other good gateway. > > Thnx in advance > Yassl Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36435&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: TWO ISP AND ONE FAILURE [7:36371]
So all of you that said hsrp with travking, curious how many of you got it from the q1 issue of packet? Bri Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36474&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: TWO ISP AND ONE FAILURE [7:36371]
Hey guys The toplogy is this: ISP (65)(ISP 169) [R1] [R2] || || \--/ | [HOST] IP:169... IP: 65. The server have two IPs And i thnik tha with BGP i got the solution but is the combitanion of both protocol HSRP and BGP. So i'm goig to telle you something more intersting. The router are Ciscos 1000 series so coulden't find the way to configure the BGP, becasue it say that don't know BGP protocol. Thanx a lot to all of the member of this list interested in help. Sincerily Yassel Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36479&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: TWO ISP AND ONE FAILURE [7:36371]
Is your server capable of running a dynamic routing protocol (RIP)? Does it support dead-gateway detection - use IRDP CM - Original Message - From: "Yassel Omar Izquierdo Souchay" To: Sent: Tuesday, February 26, 2002 5:13 AM Subject: Re: TWO ISP AND ONE FAILURE [7:36371] > Hey guys > The toplogy is this: > ISP (65)(ISP 169) > [R1] [R2] > || > || > \--/ >| >[HOST] > IP:169... > IP: 65. > The server have two IPs > > And i thnik tha with BGP i got the solution but is the combitanion of both > protocol HSRP and BGP. > So i'm goig to telle you something more intersting. The router are Ciscos > 1000 series so coulden't find the way to configure the BGP, becasue it say > that don't know BGP protocol. > > Thanx a lot to all of the member of this list interested in help. > > Sincerily > Yassel Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36485&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
You'll have to coordinate with your ISP's if you want to run BGP. To enable the feature on the 1000's, you have to upgrade to an IP Plus IOS. -Ejay -Original Message- From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] Sent: Tuesday, February 26, 2002 12:13 AM To: [EMAIL PROTECTED] Subject: Re: TWO ISP AND ONE FAILURE [7:36371] Hey guys The toplogy is this: ISP (65)(ISP 169) [R1] [R2] || || \--/ | [HOST] IP:169... IP: 65. The server have two IPs And i thnik tha with BGP i got the solution but is the combitanion of both protocol HSRP and BGP. So i'm goig to telle you something more intersting. The router are Ciscos 1000 series so coulden't find the way to configure the BGP, becasue it say that don't know BGP protocol. Thanx a lot to all of the member of this list interested in help. Sincerily Yassel Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36493&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: TWO ISP AND ONE FAILURE [7:36371]
Hi I tried some time ago to find an IOS with BGP feature, but to no avail. I couldn't find an IOS for the 1000 series which supports BGP. If you find one, let me know. Geoff -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Hire, Ejay Sent: 26 February 2002 15:35 To: [EMAIL PROTECTED] Subject: RE: TWO ISP AND ONE FAILURE [7:36371] You'll have to coordinate with your ISP's if you want to run BGP. To enable the feature on the 1000's, you have to upgrade to an IP Plus IOS. -Ejay -Original Message- From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] Sent: Tuesday, February 26, 2002 12:13 AM To: [EMAIL PROTECTED] Subject: Re: TWO ISP AND ONE FAILURE [7:36371] Hey guys The toplogy is this: ISP (65)(ISP 169) [R1] [R2] || || \--/ | [HOST] IP:169... IP: 65. The server have two IPs And i thnik tha with BGP i got the solution but is the combitanion of both protocol HSRP and BGP. So i'm goig to telle you something more intersting. The router are Ciscos 1000 series so coulden't find the way to configure the BGP, becasue it say that don't know BGP protocol. Thanx a lot to all of the member of this list interested in help. Sincerily Yassel Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36616&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Re: TWO ISP AND ONE FAILURE [7:36371]
Not me! I've been thinking about it some more since at one point I thought it would work, then I thought it had some problems, but now I'm back to thinking it would work. One issue with this method is the ever-changing default gateway but the other issue is that of source addresses and as I see it this can be solved two ways. First, you could get a decent-sized block from one of your ISPs and advertise it using BGP to both providers. Use NAT to translate your internal addresses to an address from your global pool. Second, you could simply use NAT on both border routers and translate your internal addresses to the provider addresses. One downside to this is that you'd probably need to use the links in an active/backup fashion to avoid accidentally translating the same internal address twice, each time with an IP address from a different provider. This isn't as big of a deal if you go active/backup. Sure, there will be some disruption if one link fails but it sure beats a lot of downtime and having to manually change IP addressing and gateways. John Get your own "800" number Voicemail, fax, email, and a lot more http://www.ureach.com/reg/tag On Mon, 25 Feb 2002, Brian ([EMAIL PROTECTED]) wrote: > So all of you that said hsrp with travking, curious how many of you got > it > from the q1 issue of packet? > > Bri [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36478&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Re: TWO ISP AND ONE FAILURE [7:36371]
This has turned into a really long thread ... Anyway: HSRP + BGP would be, IMHO, the best option. It would be graceful and smooth, not to mention provide automatic failover. The BIV CAVEAT - this is only true *IF* they can afford to UG their hardware and if they can justify the IP address space. If we are still just talking about one server though this is a little too heavy ... For such a relatively small (1) group of servers/domains it may be worth looking at something like a third-party IP forwarding service. You have your two IP's from two ISP's ... give your server one internal/private IP , NAT on the two routers to the ISP-specific address. In the event of a failure, the forwarding service would need to be notified . A quick google search gave me a few results, dynu.com for example. Don't really have time to see if they do everything you need, but it is atleast worth looking into! Downsides: Usually require SW to be installed on your server(s) Reliant on the third party to be in business and working :) Annual fee .. I think dynu.com said it is like $25/year Upsides: No router upgrades (flash/nvram, licensing ... new routers altogether?) No BGP activation costs (~$350 per ISP and I think $300 for the ASN) Less config work on your part ... sorry to blaspheme and recommend a non-cisco solution :) ... Thanks! TJ -Original Message- From: Yassel Omar Izquierdo Souchay [mailto:[EMAIL PROTECTED]] Sent: Monday, February 25, 2002 10:11 AM To: [EMAIL PROTECTED] Subject: TWO ISP AND ONE FAILURE [7:36371] Hello i have a frecuent porblem with one of my isp, i have two cisco routers and each one to different isp. Frequentily i have to change the gateway of one of my servers, because one isp is failure. I want to know if with one of BGP, OSPF, RIP, NAT or other protocol i could do the change automatically to the other active isp. It happening me right now. And when i have to do that i have to reset one of my servers.. :S. Is a costs operatrion its a mail server. So if somebody knows how to resolve between routers with different isp each one, how to route accross the other good gateway. Thnx in advance Yassl * The information in this email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this email are subject to the terms and conditions expressed in the governing KPMG client engagement letter. * Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36484&t=36371 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: TWO ISP AND ONE FAILURE [7:36371]+ Some details of my [7:36381]
wow...At this point I hope nobody is scanning archives for ip addresses...
>>> "Yassel Omar Izquierdo Souchay" 02/25/02 10:56AM >>>
Hello
The mail server have 2 ips one for 65.169.240. and the second 169.158.32.
network.
This is de configuration havae in my server:.
NETWORKING=yes
HOSTNAME=MailServer
#GATEWAY=169.158.32.1
GATEWAY=65.169.240.209
In this moment my gateway is 65.169.240.209, because the other (commented
with #) is down, so i have to do tha manually and restart the network
service
I thanks to you i study how to do it with HSRP. And study how this changes
affects my mail server.
So when 169.158.32. is down. I have to to manually the change of gateways
""Chris Charlebois"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Depends alot on what kind of connection you want. If you are just talking
> about outbound access from your site, that isn't a problem. Setup the two
> routers on the same subnet and use HSRP. Best practive would be to set up
> two HSRP address; each router will be primarary for one address and backup
> for the other. That way you can direct traffic over a specific connection
> when it's all up, but traffic will failover to one connection if the other
> goes down.
>
> If, on the other hand, you want to maintain public services during an
outage
> (ie, web pages, FTP sites, incoming e-mail), that is a gorilla of a
> completly different color. If you're site is big enough, you could
justify
> a /19 public address, which can be routed via BGP. That would solve alot
of
> you're problems, but it's unlikely that you'd be asking the question if
you
> had a /19. Some protocols will allow you to specifiy a backup via DNS
(I'm
> thinking SMTP), but that only helps with mail. Otherwise, you're options
> are co-locateing the equipment you always want available, or switching
both
> your WAN connections to the same ISP. THere is no really easy solution.
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Re: TWO ISP AND ONE FAILURE [7:36371]+ Some details of my net [7:36379]
Hello The mail server have 2 ips one for 65.169.240. and the second 169.158.32. network. This is de configuration havae in my server:. NETWORKING=yes HOSTNAME=MailServer #GATEWAY=169.158.32.1 GATEWAY=65.169.240.209 In this moment my gateway is 65.169.240.209, because the other (commented with #) is down, so i have to do tha manually and restart the network service I thanks to you i study how to do it with HSRP. And study how this changes affects my mail server. So when 169.158.32. is down. I have to to manually the change of gateways ""Chris Charlebois"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Depends alot on what kind of connection you want. If you are just talking > about outbound access from your site, that isn't a problem. Setup the two > routers on the same subnet and use HSRP. Best practive would be to set up > two HSRP address; each router will be primarary for one address and backup > for the other. That way you can direct traffic over a specific connection > when it's all up, but traffic will failover to one connection if the other > goes down. > > If, on the other hand, you want to maintain public services during an outage > (ie, web pages, FTP sites, incoming e-mail), that is a gorilla of a > completly different color. If you're site is big enough, you could justify > a /19 public address, which can be routed via BGP. That would solve alot of > you're problems, but it's unlikely that you'd be asking the question if you > had a /19. Some protocols will allow you to specifiy a backup via DNS (I'm > thinking SMTP), but that only helps with mail. Otherwise, you're options > are co-locateing the equipment you always want available, or switching both > your WAN connections to the same ISP. THere is no really easy solution. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36379&t=36379 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
