Err-disabled GLC-SX-MMD

[Bob Greer]

Hi there,

Thanks for reading.

I have a 2960+ with a GLC-SX-MMD which keeps disabling the port.  Its fiber-connected to another GLC-SX-MMD in a 2960x.  A show inventory on 2960+ shows the gbic and show int transceiver shows voltage but the interface logs a gbic-invalid error and shuts down.

Show interface shows a K value differences though: DLY 10 usec 0n 2960+ but DLY 1000 usec on 2960x.

Have you seen this?

Thanks!

Bob

[Dennis Mink]

looks like spanning tree kicking in action, could be for instance bpdu guard on the ports config.'

can you share the port config for both ends

[Leo Laohoo]

Upgrade the firmware of the switch.
Could be either CSCul88801 or CSCur56395.

[Daniele Giordano]

Hi, If the SFP is a compatible not original module, you can try with these hidden commands:

- service unsupported-transceiver

- no errdisable detect cause gbic-invalid

- errdisable recovery cause all

Regards.