Cisco 9500 not recognizing any SFP's when inserted (Including Cisco)

[tdavis85]

I have an issue with a Cisco C9500-48Y4C.  I have two of them in a Stackwise virtual setup, and on one of the chassis I recently started having an issue where any SFP is insert is not recognized.  I don't even get a log message saying that an SFP was installed, and it does not show up on the inventory.  I am mainly using Cisco SFP+ 10GBASE-LR transceivers, but have tried other Cisco GLC-LH transceivers as well with the same result.  This issue started recently but I cannot say exactly when I just noticed it when I went to set up a new link.  Certain port groups are fine, but others are not, i.e. interface twe1/0/1-8 all don't recognize SFP's, but those same SFP's are being recognized in Twe1/0/41 and 42.  The second chassis on the VSL setup recognizes SFP's fine.  I found a Cisco bug affecting release 16.9.1 for this, but I am running 17.4.1 which is listed as a fixed version.  Has anyone else had this issue or found a workaround.  The last reload didn't help.  I am getting ready to upgrade the IOS but was wondering if anyone had this same issue.

[Leo Laohoo]

---

@tdavis85 wrote:

but I am running 17.4.1 which is listed as a fixed version.

---

Try to avoid using single-release only train, like 17.4.X, to avoid any "difficulties".  

---

@tdavis85 wrote:

The last reload didn't help.

---

This does not bode well.  

I got a long shot with high probable chance it will not fix the issue(s).

 snmp-server view iosfix iso included
 snmp-server view iosfix ciscoEntityFRUControlMIB excluded
 snmp-server view iosfix entSensorValueEntry excluded
 snmp-server community intact10 view iosfix RW 99
 snmp-server community gattaca view iosfix RO 99

[tdavis85]

Thanks,

  I tried this and still having the same issue. I'll upgrade the IOS and if it remains I'll open a TAC case.

[Leo Laohoo]

---

@tdavis85 wrote:

I tried this and still having the same issue. I'll upgrade the IOS and if it remains I'll open a TAC case.

---

Downgrade to 17.3.4 &/or avoid 16.12.X.

[marce1000]

 - A list of compatible SFP's can be found here :

                   https://tmgmatrix.cisco.com/?si=C9500-48Y4C

 M.

[tdavis85]

They are listed as compatible transceivers.

[marce1000]

 - One option is to try the utmost-latest release :

              https://software.cisco.com/download/home/286319589/type/282046477/release/Bengaluru-17.6.1

 M.

[tdavis85]

I upgraded to 17.6.1 and am still having the issue so I will open a TAC case. I found it is in interface groupings of 4 that I have the issue, 3 different sets of 4 interfaces, so I'm thinking it may be a hardware problem.  Outside of those 12 interfaces overall, the rest read the SFP's fine.

[hernank]

Hi, I'm facing same errors, but not in a group of 4, but instead a whole bunch of them.

Did you ever get a reply on the TAC case?
Thanks!

[tdavis85]

I did not, it is going to be a hardware replacement and it is one of our core devices so we have a spare and are just waiting for failure at this point. We migrated all our links off the affected interfaces and haven't had seen the issue spread at all.

[hernank]

Thank you very much for your quick response. I'm afraid we'll need to go the same route.
This is a brand new switch I'm starting to configure. If TAC says otherwise, I'll put it down here.

Cheers!

[cajunsausage]

Did you ever get a resolution to this problem?  I am trying to use a GLC-LH-SMD SFP in my 9500-48Y4C and have the same problem, it's not recognizing it at all!