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Broadcast Limiting

Martin Ellis_2
Occasional Visitor

Broadcast Limiting

We had a broadcast storm on our network this morning, which ground pretty much the whole network to a halt.
I managed to track down where it started and I want to turn on Broadcast-Limiting on the 2650 the client resides on.

Does anyone have an opinion on what level the broadcast limit should be set at?

I know that the limit is a percentage of the total traffic on the port for a 1 second interval and the switch requires a reboot for it to take effect.

Please help.......
2 REPLIES
Massimo Vignone
Occasional Advisor

Re: Broadcast Limiting

I use the following command on my 2650 devices

broadcast-limit 20

It works quite well, limiting broadcast under 20% of bandwidth.

Martin Ellis_2
Occasional Visitor

Re: Broadcast Limiting

Thanks, I had 30% in mind. Do you have any problems with DHCP? I thought having a low percentage of total traffic might stop DHCP from working properly when there are only broadcasts going over the link.