[nsp] EtherChannel

[sthaug at nethelp.no]

> Other than that it should work - of course you may have other issues if
> you are trying to do this on say, two PA-FE cards in a VIP2, which would
> probably run into load issues with this amount of traffic.
> 
> Personally I'd stick a GEIP+ in the box instead, which shouldn't cost an
> arm and a leg to get secondhand these days either.

There are other reasons to stay away from Etherchannel between router
and switch also. We used to have several Etherchannels between 3548XLs
and 7206VXRs in production. It worked most of the time, but once in a
while we would discover that traffic had stopped on the Portchannel
interfaces. Investigating more closely, we would find OSPF on the
Portchannel interfaces stuck in EXSTART. A full shut/no shut was
required to get OSPF back to normal and traffic flowing again.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no