I am using two GLC-LH-SM's to link two Cisco 2960's (2960G-24TC-L & 2960G-48TC-L) together. I am not able to get this too work.
I'm using a yellow single mode fiber patch cable (LC to ST connected to an ST to LC, approx 10 meters), for testing purposes, labeled as 9/125. The TX and RX ends have been swapped.
I have 4 of the SFP, so I could setup ether channeling, and I can't get any of them the link. So I'm not thinking it's the SPF's