Alternatives to storm-control on Cat 6509.
Peter.George at lumison.net
Fri Aug 21 05:39:34 CDT 2009
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.
As it stands, we are at risk of overwhelming control planes with excess broadcast or multicast traffic, and I need to find alternative ways to protect these switches.
I have been researching STP enhancements, and control-plane policing in the following documents, and would appreciate advice from engineers who may have had to implement similar workarounds for storm-control in a service provider setting.
* Configuring Denial of Service Protection
* Configuring Control Plane Policing
* Configuring Optional STP Features
So, if we can't mitigate against STP events using storm-control or broadcast suppression, what might be the best combination of STP enhancements and control-plane policing?
For example, is it possible to rate-limit broadcast/multicast, STP and ARP on a per VLAN basis? If so, how?
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