I have SFP+ cables which seems to work fine but on one(maybe more?) port(Te 2/0/27) I see "unqualified transceiver" and port gets put down administratively.
Now, next door ports, eg 25 or 29 do not do that, I think I got "unqualified" transceiver but port stay up/online.
Is this not weird? Why switch would be doing this?
many thanks, L.