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Netmart
Beginner

Cisco Discovery Protocol Enhancement for Second Port Disconnect on c4500 L3

Hello,

 

Example: PC is connected to Cisco Phone and experiences sporadic network loss. Some Cisco IP Phones do support  'Cisco Discovery Protocol Enhancement for Second Port Disconnect' which allows the phone to send a message to the switch when a host unplugs from behind the phone. It has the same effect as the PC is directly connected to the switch and thus the switch would detect a link down event.

 

I was wondering, if Catalyst 4500 L3 Switch [Version 03.08.04.E] does support the logging of CDP messages.

And what phone models do support Cisco Discovery Protocol Enhancement for Second Port Disconnect?

Is it enabled by default or does it require any changes on the phone's or switch's config.

 

Please advise.

 

Thanks

 

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