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C3048TP-1GE-sup fiber module

Level 1
Level 1

I am trying to use a GLC-LH-SM module in a c3048TP-1ge-sup switch. I cannot get the interface to come up. I can see in the logs that it sees when it is inserted and removed. The other side is also a GLC-LH-SM. I am able to get a link when connecting the fiber to other Cisco switches that are not 3048s, using the same module. The following says it is compatible:

I have tried seeting the speed to 1000 and negotiate to auto. Still does not come up. Any idea why it won't come up?

1 Reply 1

Marvin Rhoads
Hall of Fame
Hall of Fame

Is your 3048 recognizing the transceiver type?

Can you provide "sh int" and "sh run int __" for the interface in question with the transceiver n place?

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