Multi Mode fibre not working

[Tabish Hussain]

Hi Team,

I have SFP-10G-SR Multimode module connected to two switch.(C9500)

The issue is when I plug multimode fibre in the module the link doesn't come up.

However, when I plug Single mode fibre in Multimode module both side of switch link come up.

Any reasons why it is happening. Why multimode fibre is not working with Multimode SFP Module?

Someone suggested because MM fibre is OM4 that is why it is not supported by older SFP modules in C9500 switches.

[balaji.bandi]

we see many issue, if they going via different comms romms and patch pannels.

glad all good.