[afnog] BGP Help

[nishal goburdhan]

Emmanuel Odoom wrote:
> Hello,

hi.


> I have been experiencing problems with BGP between my gateway router and the
> upstream ISP gateway.  BGP session goes off and on in every 5 minutes
> interval.  I suspected a possible hardware problem so I changed the router.
> This time, BGP fluctuates in less than 2 minutes.  Please advice on what
> possibly could be the problem.


are you trying to get a full table from your provider?
i don't see your filtering anything from him - with 32mb of RAM on a 
3640, you will definitely not handle a full feed (although bgp will come 
up, and then restart because of memory problems.)

what does a 'sh log' tell you?

you could upgrade memory - you'd need at least 128Mb for a full feed, 
and 12.2 is also fairly memory hungry.

if this is your only/primary provider, could you ask them to send you a 
default route instead?  if you have multiple providers, then perhaps 
you'd want their routes + a default route?

to save on memory, you could also disable 'soft-reconfig' under bgp, and 
other services that the router is running that may not be useful to you. 
  ISP essentials has a list, i think: 
ftp://ftp-eng.cisco.com/cons/isp/essentials/

in additions, ISP essentials has other useful configuration hints;  like 
  applying ACLs to your snmp communities...  :)

--n.