I can't believe it, working on real hardware as well: interface FastEthernet0/0 ip address 10.0.46.6 255.255.255.0 duplex auto speed auto standby 0 ip 10.0.46.1
router bgp 456 no synchronization bgp log-neighbor-changes neighbor 10.0.46.55 remote-as 456 no auto-summary ------------------------------------------------------------------ interface FastEthernet0/0 ip address 10.0.46.55 255.255.255.0 duplex auto speed auto router bgp 456 no synchronization bgp log-neighbor-changes neighbor 10.0.46.1 remote-as 456 no auto-summary R5(config-router)#do sh ip bgp sum BGP router identifier 10.0.46.55, local AS number 456 BGP table version is 1, main routing table version 1 Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.0.46.1 4 456 5 5 1 0 0 00:03:18 0 R5(config-router)#do sh tcp brief TCB Local Address Foreign Address (state) 66A1041C 10.0.46.55.39341 10.0.46.1.179 ESTAB System image file is "flash:c1841-adventerprisek9-mz.124-24.T7.bin" ________________________________ From: Nick Bonifacio <[email protected]> To: Bob McCouch <[email protected]> Cc: "[email protected]" <[email protected]> Sent: Thursday, October 11, 2012 8:51 AM Subject: Re: [OSL | CCIE_RS] Hello team can we make bgp neighbor ship HSRP virtual IP ? Just what I need, another OCD day. Oh well, I'll be home in about 8 hours and will have access to real hardware. I will let everyone know what happens. Nick Sent from my iPhone On Oct 11, 2012, at 8:43 AM, Bob McCouch <[email protected]> wrote: > Interesting. I was also pretty sure that didn't work. At best it would > only do a passive open (respond to a TCP syn) no originate the > session. > > Bob > -- > Sent from my iPhone, please excuse any typos. > > On Oct 11, 2012, at 8:25 AM, Nick Bonifacio <[email protected]> wrote: > >> //Disclaimer: I am using GNS3 for this example. >> >> This is the way I understand it, anyone else feel free to chime in: >> >> Think update source. >> >> router bgp 4 >> neighbor 10.0.4.5 remote-as 5 >> neighbor 10.0.4.5 update-source FastEthernet0/0 >> >> >> interface FastEthernet0/0 >> ip address 10.0.4.4 255.255.255.0 >> duplex auto >> speed auto >> standby 0 ip 10.0.4.254 >> >> how can I create a neighborship by sourcing the standby 0 IP? I can't. >> >> Let's look at router 5 on the other side >> >> interface FastEthernet0/0 >> ip address 10.0.4.5 255.255.255.0 >> duplex auto >> speed auto >> >> router bgp 5 >> no synchronization >> bgp log-neighbor-changes >> neighbor 10.0.1.1 remote-as 1 >> neighbor 10.0.4.254 remote-as 4 >> no auto-summary >> >> >> Let's debug BGP on R4 >> >> R4(config-router)#no >> *Mar 1 00:31:36.267: BGP: 10.0.4.5 passive open to 10.0.4.254 >> *Mar 1 00:31:36.271: BGP: 10.0.4.5 passive open failed - 10.0.4.254 is not >> update-source FastEthernet0/0's address (10.0.4.4) >> *Mar 1 00:31:36.271: BGP: 10.0.4.5 remote connection attempt failed, local >> address 10.0.4.254 >> R4(config-router)#no >> *Mar 1 00:31:38.255: BGP: 10.0.4.5 open active, local address 10.0.4.4 >> *Mar 1 00:31:38.311: BGP: 10.0.4.5 open failed: Connection refused by >> remote host, open active delayed 26388ms (35000ms max, 28% jitter) >> R4(config-router)#no >> >> ok it is complaining about 10.0.4.254 not being fa0/0's address. Fine, I >> will remove update source fa0/0 >> >> >> >> router bgp 4 >> no synchronization >> bgp log-neighbor-changes >> neighbor 10.0.4.2 remote-as 2 >> neighbor 10.0.4.3 remote-as 3 >> neighbor 10.0.4.5 remote-as 5 >> neighbor 10.0.4.5 update-source FastEthernet0/0 >> maximum-paths 3 >> no auto-summary >> >> no neighbor 10.0.4.5 update-source FastEthernet0/0 >> >> BGP: 10.0.4.5 rcvd OPEN w/ remote AS 5 >> *Mar 1 00:33:09.427: BGP: 10.0.4.5 went from OpenSent to OpenConfirm >> *Mar 1 00:33:09.427: BGP: 10.0.4.5 send message type 1, length (incl. >> header) 45 >> *Mar 1 00:33:09.475: BGP: 10.0.4.5 went from OpenConfirm to Established >> *Mar 1 00:33:09.475: %BGP-5-ADJCHANGE: neighbor 10.0.4.5 Up >> >> uh oh, it is working! Interesting.. I am in GNS3 but will lab it up at home >> on real hardware once I get there. This is not the behavior I expected. >> >> R5#sh ip bgp sum >> [...] >> Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down >> State/PfxRcd >> 10.0.1.1 4 1 40 40 2 0 0 00:36:01 1 >> 10.0.4.254 4 4 16 22 2 0 0 00:02:47 1 >> >> >> I also tested it with iBGP and the same behavior occured. I also failed >> over the HSRP address and made another node active as 10.0.4.254 and the >> adjacency did come back up on that router! >> >> I will try this out on real hardware once I get home and then report back. >> We had tried this in production 2 months ago using ASR1000s and could not >> get it working. >> >> Nick >> >> >> ________________________________ >> From: Samir Idris <[email protected]> >> To: Nick Bonifacio <[email protected]> >> Cc: Taqdir Singh <[email protected]>; "[email protected]" >> <[email protected]> >> Sent: Thursday, October 11, 2012 7:50 AM >> Subject: Re: [OSL | CCIE_RS] Hello team can we make bgp neighbor ship HSRP >> virtual IP ? >> >> >> Nick, >> >> Why cant we source from a virtual IP? Can you shed some light on the logic? >> >> Regards, >> Samir. >> >> On Thursday, October 11, 2012, Nick Bonifacio <[email protected]> wrote: >>> Hi Taqdir, >>> >>> You have to source from a physical interface and cannot source from a vIP. >>> Here is a link to "best practice" using HSRP and multihomed BGP >>> environments: >>> >>> http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a0080093f2c.shtml >>> >>> >>> Thanks! >>> Nick >>> >>> ________________________________ >>> From: Taqdir Singh <[email protected]> >>> To: [email protected] >>> Sent: Thursday, October 11, 2012 3:16 AM >>> Subject: [OSL | CCIE_RS] Hello team can we make bgp neighbor ship HSRP >>> virtual IP ? >>> >>> Hello team can we make bgp neighborship with HSRP virtual IP ? >>> _______________________________________________ >>> For more information regarding industry leading CCIE Lab training, please >>> visit http://www.ipexpert.com/ >>> >>> Are you a CCNP or CCIE and looking for a job? Check out >>> http://www.platinumplacement.com/ >>> >>> http://onlinestudylist.com/mailman/listinfo/ccie_rs >>> _______________________________________________ >>> For more information regarding industry leading CCIE Lab training, please >>> visit http://www.ipexpert.com/ >>> >>> Are you a CCNP or CCIE and looking for a job? Check out >>> http://www.platinumplacement.com/ >>> >>> http://onlinestudylist.com/mailman/listinfo/ccie_rs >> >> -- >> Samir Idris >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> Are you a CCNP or CCIE and looking for a job? Check out >> www.PlatinumPlacement.com >> >> http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
