Re: When cat comes chasing...

[Roland Dobbins <rdobbins () cisco com>]

On Mar 23, 2007, at 1:18 PM, WALI wrote:

> Anyone...anything???

Could it be DNS or some other name-resolution service you're using?

Could it be the autonegotiate between the routers?  Why not go ahead  
and nail up the link?

What's the CPU load on the routers (baselined with MRTG)?  What kind  
of routers are they?  Are they dedicated to this one link, or are  
they handling other connections?

There are a lot of physical stats you can get on layer-2 ports from  
any vendor's products, all kinds of errors to look for, etc. on the  
routers and the switches.

Can you enable NetFlow on the routers and export it to something like  
nfdump/nfsen in order to get the traffic breakdown?

Is access to other things impacted?  Have you enabled spantree  
portfast or its equivalent on the switches?  Is a spanning-tree  
recalc happening for some reason?  The syslog from the switches  
should tell you that.

Those are the kinds of things I'd look for, FWIW.

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Roland Dobbins <rdobbins () cisco com> // 408.527.6376 voice

        Words that come from a machine have no soul.

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