[nsp] BGP4 and high Ping Times

[Stephen J. Wilcox]

On Thu, 30 Jan 2003 sthaug at nethelp.no wrote:

> > Yes, you get this when the BGP scanner runs which is once per minute, as the
> > 7206 is a single processor this means whilst its churning 250000 routes your
> > packet latency goes up.
> 
> But why should he care? ICMP for one of the router interfaces is not the
> same as ICMP going *through* the router - this may not be affected at all.
> 
> The per-minute BGP scan gives higher roundtrip times even for platforms
> with hardware-based forwarding (e.g. the 6500).

My observation is that under load even forwarded packets inherit some jitter and
latency up to the point that the routing processes start to fail.

Depends on load but "sh proc cpu h" is good if you have it, beware of any
extended periods at 100%!

Steve