To be honest, I'm as amused as you are with this :-). I'm in a bootcamp for the next three weeks, but I'll for sure give it a thorough test when I'm done :-).
I'm guessing it can be made to work, as long as HSRP-side is "passive", i.e. not the one initiating connection. Of course, without a state exchange between HSRP peers, when there is HSRP failover, BGP will flap. This is probably why it's not recommended. -- Marko Milivojevic - CCIE #18427 (SP R&S) Senior CCIE Instructor - IPexpert On Thu, Oct 11, 2012 at 5:16 PM, Nick Bonifacio <[email protected]> wrote: > There has to be instability issues, right? Flapping, arps and macs getting > hosed perhaps? > > *Paging Dr. Marko* > > > ________________________________ > From: Tony Singh <[email protected]> > To: Nick Bonifacio <[email protected]> > Cc: Bob McCouch <[email protected]>; "[email protected]" > <[email protected]> > Sent: Thursday, October 11, 2012 6:13 PM > Subject: Re: [OSL | CCIE_RS] Hello team can we make bgp neighbor ship HSRP > virtual IP ? > > > Good work Nick > > I'm sure Cisco know this works..? Why do they not recommend it then ... > > > -- > BR > > Tony > Sent from my iPhone on 3 > > On 11 Oct 2012, at 23:06, Nick Bonifacio <[email protected]> wrote: > > > >> >>R5(config-router)#do sh ip b >>*Oct 11 22:09:20.495: %BGP-5-ADJCHANGE: neighbor 10.0.46.1 Down User reset >>*Oct 11 22:09:20.907: %BGP-5-ADJCHANGE: neighbor 10.0.46.1 Up gp >>BGP table version is 16, local router ID is 10.0.46.55 >>Status codes: s suppressed, d damped, h history, * valid, > best, i - >>internal, >> r RIB-failure, S Stale >>Origin codes: i - IGP, e - EGP, ? - incomplete >> >> >> Network Next Hop Metric LocPrf Weight Path >>*>i192.46.1.0 10.0.46.1 1234 100 10000 i >>*>i192.46.2.0 10.0.46.1 1234 100 10000 i >>*>i192.46.3.0 10.0.46.1 1234 100 10000 i >>*>i192.46.4.0 10.0.46.1 1234 100 10000 i >>*>i192.46.5.0 10.0.46.1 1234 100 10000 i >>*>i192.46.6.0 10.0.46.1 1234 100 10000 i >>*>i192.46.7.0 10.0.46.1 1234 100 10000 i >>*>i192.46.8.0 10.0.46.1 1234 100 10000 i >>*>i192.46.9.0 10.0.46.1 1234 100 10000 i >>*>i192.46.10.0 10.0.46.1 1234 100 10000 i >>*>i192.46.11.0 10.0.46.1 1234 100 10000 i >>*>i192.46.12.0 10.0.46.1 1234 100 10000 i >>*>i192.46.13.0 10.0.46.1 1234 100 10000 i >>*>i192.46.14.0 10.0.46.1 1234 100 10000 i >>*>i192.46.15.0 10.0.46.1 1234 100 10000 i >>R5(config-router)# >> >> >>i need a fast way to copy and paste prefixes in :) >> >> >>I did manipulate weight, MED... >> >>________________________________ >> From: Tony Singh <[email protected]> >>To: Nick Bonifacio <[email protected]> >>Cc: Bob McCouch <[email protected]>; "[email protected]" >><[email protected]> >>Sent: Thursday, October 11, 2012 5:54 PM >>Subject: Re: [OSL | CCIE_RS] Hello team can we make bgp neighbor ship HSRP >>virtual IP ? >> >>Take it further see how many prefixes it can handle, check metrics work >>weight local pref med... >> >>-- >>BR >> >>Tony >> >>Sent from my iPad >> >>On 11 Oct 2012, at 22:34, Nick Bonifacio <[email protected]> wrote: >> >>> 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 >> >> >> > _______________________________________________ > 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
