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broadcast storms

By dboeshaar ·
We have a ethernet network with a fiber optic backbone with a cisco catalyst switch to segment the network. We are getting what appears to be an occasional brodcast storm of UDP packets. This is bringing the network to it's knees. Any suggestions onhow to isolate and control this problem?

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broadcast storms

by -Q-240248 In reply to broadcast storms

I am assuming that since you've dicovered the UDPs you should also be able to disclose the port number. This may then give you an indication of the application causing the flood.

You can also trace (debug) UDP packets from a Cisco router.

Yourbest bet is to place a sniffer on the network. Since you are switching, you'll need to narrow down the source by spanning the ports.

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broadcast storms

by dboeshaar In reply to broadcast storms

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broadcast storms

by NetWill In reply to broadcast storms

put Sniffer on one the port on the switch or turn on Network Monitor on NT server

have it set to capture broadcast packets

analyze the packet for source Ip address

see what is running on the host with souce IP address and troubleshoot

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broadcast storms

by dboeshaar In reply to broadcast storms

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by dboeshaar In reply to broadcast storms

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