Cisco :: No MAC Address On Switch Port?

Apr 16, 2012

There 's a Cisco IP phone that sits between a PC and the switch port. On the switch port, no MAC address is learned. However, the switch is able to detect the IP phone and deliver power to it:

TNSWACCS04A1#sh power inline fa1/0/13
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa1/0/13 auto on 5.0 IP Phone 7911 2 15.4

[code]....

Switch is Catalyst 3750 with IOS version 12.2(58)SE1

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There 's a Cisco IP phone that sits between a PC and the switch port. On the switch port, no MAC address is learned. However, the switch is able to detect the IP phone and deliver power to it: [code] Switch is Catalyst 3750 with IOS version  12.2(58)SE1.

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[Code].....

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[Code]......

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