[c-nsp] IOS ping response improvement

Oliver Boehmer (oboehmer) oboehmer at cisco.com
Tue Feb 14 01:18:58 EST 2006

Church, Chuck <> wrote on Tuesday, February 14, 2006 5:07 AM:

> Anyone,
>     I'm facing an issue with missed SLAs regarding 2900XL switches and
> slow ping response to the mgmt interface at times.  I realize that
> ICMP is by design a low-priority thread.  But convincing that to our
> PHBs may be a large battle. 

I feel this battle must be fought, so suggesting to use RTR/IP-SLA could
be counter-productive :-|
but anyway: RTR/IP-SLA with udpEcho or other non-ICMP probes are able to
compensate for any local processing delays (by using a time-stamp on the
packet buffer done by the driver), so even if it takes as much as a
second for the packet to be processed by IP-Input process+friends,
RTR/IP-SLA will still be able to report the "real" RTT.

I'm not sure if RTR is available on the 2900XL (if you want to try, try
the command "rtr responder")


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