Lot of Multicast traffic on LAN

Posted by Nel on Server Fault See other posts from Server Fault or by Nel
Published on 2011-02-15T05:33:54Z Indexed on 2011/02/15 7:27 UTC
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lan

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multicast

Recently the whole network at work is being hit by multicast traffic originating on the LAN itself. I did some investigating and the service which seems to be responsible is ws-discovery.

I have attached a screenshot of wireshark capturing the traffic. I have tried shutting down the source machine from which it was originating, but the multicast traffic still seems to be present in the network.

My network topology

2 subnets - 10.10.10.0/24 and 10.20.10.0/24. Gateway is a debian system. We have 3 switches for 3 floors. They are all unmanaged Dlink 24-port switches.

Multicast blocking at switch level is out of the question. Any solutions? :(

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