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VOIP calls dropping

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TitleVOIP calls dropping
Symptoms
VOIP calls dropping/show rmon stats show incrementing collisions
Environment
N/S/K Securestack
Cause
Port negotiated to half duplex, the output of show rmon stats shows incrementing collisions on the port the phone/phone server are connected to.
Resolution
Hard set the port duplex using the following commands:

Set port speed <port-string> speed
set port duplex <port-string> full

These commands will not take effect until you enter the command:

set port negotiation <port-string> disable.

run the show rmon stats <relevant port> and verify that the collisions field is no longer incrementing.
Additional notes

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