I am trying to create a trunk between a WS-C3750G-24WS and a WS-C3750G-48PS both running 12.2(55) using MM fiber and Cisco GLC-SX-MMs. The strange thing is when I insert the GLC-SX-MMs into the SFP ports and do show int transceivers, I get no output.
When I try and connect the fiber patch between the two switches, I don't get a link up. If I remove the GLC-SX-MM from the WS-C3750-24WS and place it into the WS-C3750G-48PS (meaning the WS-C3750G-48PS has two GLC-SX-MMs) I can use a patch and I get a link with no problem.
I am kinda scratching my head as to why the WS-C3750-24WS is not working with my Cisco GLC-SX-MMs.
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