[115387] in North American Network Operators' Group
Re: Unicast Flooding
daemon@ATHENA.MIT.EDU (Steven King)
Thu Jun 18 14:46:18 2009
Date: Thu, 18 Jun 2009 14:45:45 -0400
From: Steven King <sking@kingrst.com>
To: Lee <ler762@gmail.com>
In-Reply-To: <dd5f2deb0906180928x4f1919a0n27a32b45edc48f9@mail.gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Relying on a TCN would yield very inconsistent results.
Lee wrote:
> 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
>
>
--
Steve King
Network Engineer - Liquid Web, Inc.
Cisco Certified Network Associate
CompTIA Linux+ Certified Professional
CompTIA A+ Certified Professional
