Cisco Help!

I have a 2960 x that I just configured. I insert an sfp module and then connect it with a fiber cable to a 3550 fiber switch and nothing happens the fiber port doesn't come up, no link light or anything. I entered the command for service unsupported-transceiver & no errdisable detect cause gbic-invalid just to make sure that wasn't the issue but the issue is still there. AnY HeLp GuYs!?

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Comments

Kreken

Did you do no shut?

Edit: Check polarity and if necessary, swap.

greg9891

no i didn't but I assumed that once the port detects a connection that it would change the state to up on its own

Kreken

It could be administratively shutdown.
Try to switch places of send and receive cables.

greg9891

I don't think I can I am using an mtrj to lc patch cable.

Kreken

You can do it on LC connector.

greg9891

I am on the phone with Cisco tech support and i think the issue is that we have an spf that is a higher speed than than the 3550 fiber switch we are connect to so it can't negotiate the speed. I think?........

Priston

Do you know the model of the sfp and gbic your using?
If the sfp is 1000sx and the gbic is 100fx it won't work.

greg9891

Priston wrote: »

Do you know the model of the sfp and gbic your using?
If the sfp is 1000sx and the gbic is 100fx it won't work.

Thanks Priston Found that out the hard way!