[nsp] Netflow Questions on a 2621

Dan Hopkins unreachable at nexthop.net
Fri Mar 14 18:43:51 EST 2003

the cpu should be fine but keep an eye on avgBusy5 (.
with your mrtg setup.  if you are not process switching, it would take a
lot to add any latency to passing packets.

if you start to run hot, you can also tweak the NetFlow sampling interval.


on Friday in the PM, Burton Windle wrote:
> We have a 2621 router which averages 60 kilobytes/sec during the day out a
> FastEth interface. Its running 12.1(5)T10 with 64mb RAM.  The CPU usage
> right now is next to nothing (CPU utilization for five seconds: 5%/4%; one
> minute: 5%; five minutes: 5%)
> We wish to enable NetFlow stats on this router, to monitor what protocols
> are being passed/using the most bandwidth (we already use MRTG).
> A) Does this version of IOS/hardware support netflow?
> B) Would a 2621 be fast enough to enable NetFlow without adding noticeable
>    latency to routing?
> --
> Burton Windle                           burton at fint.org
> Linux: the "grim reaper of innocent orphaned children."
>           from /usr/src/linux-2.4.18/init/main.c:461

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