Re: How I could stop the switch from learning the MAC

From: Paul Cosgrove (paul.cosgrove@heanet.ie)
Date: Fri May 09 2008 - 11:14:10 ART

I guess your aim is to allow traffic to transit the switch without it
learning mac addresses of the sources.

Service providers often want to do this when providing vlan circuits
between customer LANs. If customers have large flat networks an
aggregation SP switch could exhaust its CAM table. If a circuit is
point to point then there is really no need to learn mac addresses, you
just want to forward on whatever traffic hits the port at either end.

You never mentioned the model of switch, but I do not think this is
possible on 3550/3560/3750, though I believe you can do it on ME3400s.

Paul.

ccie wrote:
> Dear Experts,
>
>
>
> How I could stop the switch from learning the MAC address-table dynamically
> for certain VLAN.
>
>
> Regards,
>
> Amin
>
>
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