I am seeing issues with the 40Gb SFP I have.
The SFPs are all marked as QSFP-40G-CSR4 but some are marked Class1 other Class 1M.
If I have a pair of ports up and running with a Class 1M SFP at both ends, we’re getting link lights at both ends.
If I sub in a Class 1 at either end, the link goes out at the end with a class 1 SFP
If I sub in Class 1 SFPs at both ends, the link light goes out at both ends.
This suggests there’s some sort of issue with the SFPs with Class 1 marking, is anyone aware of the issue and/or how to resolve it?
