Hello - we have installed a new Cisco Catalyst 3750 V2 switch in our warehouse, and need to connect it via fiber to another switch. We have a GLC-SX SFP MMF module installed in port 1, and a Duplex Multimode fiber patch cable connecting into that module. The switch was processed through express mode, sertting the correct IP configuration for the network, and reinitialized the switch. We also confirmed that the port 1 was not shutdown, with a NO SHUT command. It shows the port as down, but not off. We get no activity light on the port, however. The switch and port on the other side of the connection are active. Not sure what the problem could be.
Thanks for any help