CSCwj16930 - 9800-M unable to connect to 25G port to Nexus 9K Switch

[sro]

When can we expect a bugfix for this 25G problem ?

[marce1000]

 - By definition you must forward the question to TAC. This group is only for customers , discussing experiences with bugs,

 M.

[4DigitCCIE]

In our case I was able to configure the FEC on the Nexus side to " fec rs-ieee" or " fec rs-cons16" and the interface comes up and works.  This info didn't come from TAC - I was just experimenting, but I do still have a case open to find out whether the Nexus or the WLC is at fault for the FEC autonegotiation issue and which of the two FEC modes they recommend.

[andrew_cooper]

Did you ever get an update from TAC?  Trying to bring a new pair online and I'm assuming we're hitting this.  I tried both fec modes you mentioned with no impact.  I will say we are using the CU3M cables which actually are not in the supported table.  But I would assume they are supported.  The table lists the CU1M and CU5M and they show supported in the WLC when plugged in.  We are connecting to N9K-C93180YC-FX3