I have a WS-C2960G-24TC-L
with a 1000base LX SFP
connected via single mode to an Incomming gigabit circuit from SSE/Telco (Scottish and Southern Electric)
this configuration works ok.
When i move the connection to a WS-C3750G-24TS-1U (with the same sfp) i get no connectivity, no physical or anything,
has anyone seen this before when i do a show interface it does nothing, not connected etc.
Any top tips and handy hots would be appreciated