Link between CPAK-100G-SR10s is not UP.

[duytoannguyen]

Hi all!

I have an error with the 100GE link between A9K and NCS2K using CPAK-100G-SR10s and a MPO cable.

At A9K's side, the RX value of all lanes is fine as below:

but PCS lane mapping of all lanes is invalided

and of course, that port is not UP.

At NCS2K's side, RX value of all lanes is in the range but there is an alarm as below:

Port status is OOS, too.

I decided to loop back to trace.

At A9K, set Internal loopback. Amazingly, that port is UP and that alarm is cleared on the client port in 100ME-CKC card of NCS2K.

I released that loopback and then set Facility loopback at the client port in 100ME-CKC of NCS2K. "Remote Fault" alarm is cleared but the port of A9K is not UP.

Release FAC loopback and the set Terminal loopback. The result is the same.

Someone help me to solve this case.

[marce1000]

  - Verify compatibility of the SFP's used on the involved platforms according to : https://tmgmatrix.cisco.com/

 M.

[duytoannguyen]

This link used to work. I mean this connection had worked for 4 yrs and this fault has risen just for 5 days . We had changed a new MPO cable but nothing changed.

[marce1000]

            - Check logs on both devices when the link is being connected ,

 M.

[duytoannguyen]

This case has been closed after replacing the 1-port 100G modular port adapter of the A9K. Thanks for your advice.