Alternatives to storm-control on Cat 6509.

Nick Hilliard nick at
Fri Aug 21 10:23:11 CDT 2009


This question would be better directed at cisco-nsp, but...

On 21/08/2009 11:39, Peter George wrote:
> I have several Catalyst 6500 (Supervisor 32) aggregation switches with
> WS-X6148A-GE-TX and WS-X6148-GE-TX line cards.
> These line cards do not support storm-control/broadcast suppression.
> This impacted us badly during a recent spanning tree event.

Not surprised.  The 61xx cards are not service provider suitable line cards 
and they have proved this very clearly.  Sorry to hear about these storms - 
they really are devastating, aren't they?  But if you're running L2 
customer facing services, particularly shared L2 domain access, there are 
two things you care about: storm control and port security (mac address 
counting).  The 61xx cards don't do storm control.

> For example, is it possible to rate-limit broadcast/multicast, STP and
> ARP on a per VLAN basis? If so, how?

Yes, you replace your 61xx cards with 67xx cards.  You can't do this sort 
of thing with qos or copp.


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