Cisco UC540 flooding network with broadcast and multicast packets

We have an older UC540 and for some reason it seems to flood our network with broadcast and multicast packets on the data VLAN thus bogging down our switch and internet connection.  Has anyone ever seen this before?  If so, any ideas on how to fix?  Its on 12.x iOS software.
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That could be standard problem on UCS 500 with Music on Hold.
If it is, you can disable "Enable music on hold for internal calls."

Or if it is not, you can capture traffic and as a quick fix you can filter multicast packets when entering VLAN.

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DaveKall42Author Commented:
That was it! Turning off MOH for internal calls fixed the issue.  Thanks for your great help!
I am glad that I could help.
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