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Pear11
Beginner

WS-C4507R+E - Duplex mismatch with MAC 1 (half duplex)

: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet2/25 (not half duplex), with MAC 1 (half duplex)

: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet2/25 (not half duplex), with MAC t 1 (half duplex).
: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet2/25 (not half duplex), with MAC address Port 1 (half duplex).

 

Getting above log message, Cisco IP phone connected to switch WS-C4507R+E. 

 

Please advice on resolve the issue.

Thanks,



1 REPLY 1
Jaderson Pessoa
Events Top Contributor

Hello,

Maybe it is a cable damaged, try swap it.
Jaderson Pessoa
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