I have 2 Cisco SG500X switches that I want to stack over 10G fiber. I have two 3rd-party SFP-10G-SR modules which I'm having trouble with.
Should SFP modules be detected by the switch when plugged in, regardless of whether fiber is attached? I've checked logs when attaching/removing the modules and nothing shows up. I'm trying to figure out if the issue is with the modules or the fiber.
Thanks.
Best Answer
With IOS, you will not detect non-Cisco SFP modules until you enter the hidden command
service unsupported-transceiver
in configuration mode.Note that this is a hidden command, so completion is not available while typing the command.
On this example, with a Cisco 3750 switch, you will notice the warning displayed by IOS when you activate this service:
Answer to your first question: YES, SFP modules will be detected by the switch when plugged in, regardless of whether fiber is attached or not. But only after having entered this hidden command.