[c-nsp] Cisco 7301 running at 99% CPU doing iBGP update

[Łukasz Bromirski]

jamie baddeley wrote:

> I've got a 7301 EBGP peered with International Transit, receiving the
> global table. It seems to recieve the updates OK, and after about 3
> minutes or so, is carrying the full table happily.
> 
> However, when I send that table onwards to an iBGP peer (another 7301),
> things get awful. CPU maxes out on both the eBGP peered router. Almost
> all of that is running the BGP process. 35 minutes later, and I'm only
> 144K pfxs recieved on the iBGP peer. Both are equipped with a gig of
> memory.
> 
> I'm somewhat surprised by this. Should I be? I've tried other platforms,
> and my trusty old 7206VXR had no problems sending the global table
> onwards to an iBGP peer.
> 
> Running c7301-p-mz.124-8.bin

Are interfaces without errors? What's MTU between neighbours? What's
eating most of the CPU time? Do next-hops for prefixes get installed
properly?

-- 
"Confidence is what you have before you    |            Łukasz Bromirski
  understand the problem." -- Woody Allen   |        lukasz:bromirski,net