mls rate-limiting

lukaszkhalil · ‎04-18-2009

Hello

I'm wondering if you know how can I monitor, when I exceed the limits set by the mls rate-limiters in Catalyst 6500. Should I see something about that in a syslog?

Thanks in advance for any help

Regards

Lukas

Giuseppe Larosa · ‎04-18-2009

Hello Lukas,

I've found two sh commands

sh mls rate-limit

sh mls rate-limit usage

see

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/configuration/guide/dos.html#wp1141067

I don't know if these events are logged the objective is that of avoiding excessive cpu load and logging can loads the cpu as well.

in the above chapter there is a mention of logging when using a VACL

in the error message guide there is a section about MLS_RATE events but it include only related errors see

http://www.cisco.com/en/US/docs/ios/12_2sx/system/messages/sm2sx05.html#wp1040794

so no logging of activity without using the VACL if I've correctly understood.

Hope to help

Giuseppe

lukaszkhalil · ‎04-21-2009

Hi

Thank you. For sure logging could impact the CPU, but at least there should be a counter that can be readed, which shows that the mls limits are set to low.

I'll open a TAC case with such question. If I get any answer I'll let you know.

Regards

Lukas