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New Member

Rate Limiting

I have a device connected to a switchport that I would like to have shut down IF the traffic exceeds a certain amount. This device seems to spew gross amounts of unicast traffic at times and as a result it degrades the circuit (T1) so badly that the circuit becomes unusable until the device is disconnected from the network.

I would like to configure the switch to watch the unicast traffic and when the traffic exceeds a certain amount have the switchport shutdown.

Your help is greatly appreciated.

Brian

4 REPLIES

Re: Rate Limiting

Rate limiting will not shutdown the port,but it will drop traffic after a particular limit.

What switch is it ?

New Member

Re: Rate Limiting

Thanks for the reply. It is a 3550-48. Dropping the traffic would definitely suffice.

Brian

Re: Rate Limiting

I thought you could set CAR (rate-limit) on a vlan or interface basis on the 3550, but i cant seem to find a reference for this feature on the 3550.

http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1828/products_command_reference_chapter09186a0080087dac.html#1017761

Silver

Re: Rate Limiting

Hi,

With Cat3550 you can use "storm-control unicast level" command and provided you run IOS 12.2(25)SE and higher also "storm-control action shutdown" which shuts the port down (puts into errdisable status).

Best regards,

Antonin

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