[c-nsp] BGP KEEPALIVE maximum frequency

[Keegan Holley]

Yea try some of the IETF or cisco news groups.  Someone is bound to know the
answer to this.


On Tue, Dec 7, 2010 at 1:31 AM, M. V. <bored_to_death85 at yahoo.com> wrote:

>  thank you Keegan.
>
> > is it possible that these were just retransmissions cause by some sort
> > of error in your lab setup?
>
> i don't think that's the case here, 'cause each packet has its own sequence
> number, plus it always happens.
>
>
> >  if it is a bug have you tried the test on multiple platforms and
> > multiple versions of IOS?
>
> actually i have. i have tested and seen this behaviour on 3 different
> systems:
> 1) virtual cisco3600 (IOS version: 12.3(22)) on Dynamips
> 2) a real-box "Cisco2821 (IOS version: 12.4(15)T13)
> 3) Quagga (cisco-like open-source routing software)
> i don't think it's a bug. i think they've implemented it this way for a
> reason. i just can't figure it out.
>
>
> > If I had to guess I would say that the BGP process may start before
> > the actual layer2/3/4 path is ready to carry the control traffic so
> > sending multiple keepalives is a way to overcome delays in things
> > like arp or even LSP establishment or something I've missed.
>
> i'm not sure, but this could be the reason.
>
> thanks again.
>
>