3560 V2 48pt Switch - second transceiver port not active

[Sean Ryan]

I have a 3560 V2 48port switch that is working in a live environment and has a transceiver connected into one of the two transceiver ports and is working without issue.

I am connecting a second fibre run to this switch. I have connected the transceiver with the fibre cable connected into the second transceiver port on the switch. However, I am seeing no activity at all. As I test I connected it into the currently working port and saw activity so I know the fibre run, fibre cable and transceiver are all functioning correctly. The issue seems to be with the second transceiver port.

Is this a fault or is this something that needs to be configured in order to 'enable' the second port.

Thanks,

Seán

[Reza Sharifi]

If the cabling and the optics are all good, then maybe the interface is in shutdown mode.

try this

config t

interface x/x (this is the interface you have the fiber connected to)

no sh

exit

exit

wr

To verify the interface is up or down

sh ip int brie gix/x

If the above suggestion does not help, try crossing the fiber strands on one side of the connection.

HTH