[c-nsp] IPv6 BGP on 7200

[Paul Cairney]

On Tue, Feb 27, 2007 at 01:11:58PM +0100, Stefan M. Brandl wrote:
> On Tue, Feb 27, 2007 at 11:10:53AM +0000, Paul Cairney wrote:
> > On Tue, Feb 27, 2007 at 09:40:38AM +0100, Stefan M. Brandl wrote:
> > > Hi,
> > > I have two Cisco 7206-NPE-G1, connected via OC3.
> > > Both routers do BGP with IPv4 and v6.
> > > The v6-session goes down every 10-30 minutes:
> > > 
> > > Feb 27 08:08:18: %BGP-5-ADJCHANGE: neighbor 2001:16E0:0:5:0:DEAD:BEEF:1 Up 
> > > Feb 27 08:15:54: %BGP-5-ADJCHANGE: neighbor 2001:16E0:0:5:0:DEAD:BEEF:1 Down Peer closed the session
> > ~
> > > The IPv4-BGP-session is stable.
> > > Both routers also do v4 and v6 BGP to other routers just fine.
> > > Where could be the problem? How to debug?
> > > 
> > 
> > Stefan,
> > 
> > Did this occur following an upgrade to 12.2(25)S12 by any chance?
> > 
> 
> Yes, one router is running 12.2(25)S12
> 
> > I have seen similar issues with v6 sessions that had previously been stable for > 1 year prior to the upgrade, as yet I have no solution.
> > 
> 
> Oh, that's bad news :-(
> I look if I can do a downgrade.
> 


I mentioned this a couple of time on-list earlier this month following the release of 12.2(25)S12 but nobody else indicated they were also having this problem.

Sadly ipv6 is one of the main reasons we are using this train, I have left this image running on a quite router in a pop with no v6 customers attached however it makes this release unsuitable for the rest of the network :| 

Security fixes Vs having stable IPv6 BGP.... guess your best bet for now is to stick the workarrounds from last month back into your config and downgrade, thankfully the previous 12.2(25)S releases have been relativly issue free until this.


Paul