switch1#show interfaces descri
...
Fa0/13 up up
Fa0/14 down down
Fa0/15 up up
...
(the lights are also on on both ports 13 and 15)
However:
i.e. nothing for port 15!
How to determine the MAC address of this port or how to wake up the device? Once again, the lights on both ports are green.
switch1#show mac-address-table
24 x.dc15.93a9 DYNAMIC Fa0/13
24 x.9931.296d DYNAMIC Fa0/11
24 x.2196.cf24 DYNAMIC Gi0/1
24 x.a947.fb81 DYNAMIC Fa0/11
24 x.b954.90c2 DYNAMIC Fa0/8
24 x.b976.a45c DYNAMIC Fa0/2
24 x.8f1c.f11b DYNAMIC Fa0/11
24 x.ba8e.f467 DYNAMIC Fa0/11
28 x.2196.cf24 DYNAMIC Gi0/1
28 x.f08a.6025 DYNAMIC Fa0/20
28 x.f08a.6026 DYNAMIC Fa0/19
28 x.f08a.6027 DYNAMIC Fa0/22
21 x.2196.cf24 DYNAMIC Gi0/1
20 x.2196.cf24 DYNAMIC Gi0/1