nanog mailing list archives

Re: Unicast Flooding


From: Lee <ler762 () gmail com>
Date: Thu, 18 Jun 2009 12:28:44 -0400

On 6/18/09, Brian Shope <blackwolf99999 () gmail com> wrote:
Thanks for all the good info..

So it sounds like changing my CAM timeout to 4 hours is the best
suggestion.  Anyone have any problems when implementing this?

Not as long as all the user ports have portfast enabled.  Without
portfast, when a port goes up or down it causes a topology change
notification which sets the fast aging timer and the cam table entries
age out in something like 15 seconds.

Regards,
Lee


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