3650 Switch not recognizing SFP+ insertion

[marcp5693]

Got a strange one here.

I've got a WS-C3650-24PD with two Cisco SFP-10GB-SR transceivers installed in TE1/1/3 and TE1/1/4.

The transceiver in TE1/1/4 powers up and is correctly recognized.  The one in TE/1/1/3 does not.

I've tried switching their positions, and both transceivers work fine in TE1/1/4.  Neither one is recognized in TE1/1/3.

I don't even get any logging showing that the switch is recognizing that a transceiver is being inserted in that slot.

I'm updated to the recommended software, which is 16.12.05b.  I've even tried using the unsupported transceiver commands with no luck.

Is there anything else to do?  Do I just have a dead slot?

Thanks,

Marc

[balaji.bandi]

it has 2 Gig  and 2 SFP+ port, Do you have any 1Gig port used ?

can you post show interface status (more looking uplink ports)

[marcp5693]

The other two uplink ports, Gi1/1/1 and Gi1/1/2, are not populated.  Per the data sheet I believe that this is a supported configuration.

Attached are 4 screenshots of show int for the 4 uplink ports.

Thanks,

Marc

[balaji.bandi]

ok thank you for the information now it clear (nothing connected G1 and 2)

Can you plug the SFP in to Te 1/1/3 and post below output :

show interface ten 1/1/3

show interface ten 1/1/3 trans

show logg

show run interface ten 1/1/3

show run interface ten 1/1/4

[marcp5693]

The show int for te1/1/3 is with the SFP inserted.

As I mentioned, the switch doesn't log any activity when I insert or remove the SFP in that slot.

Thanks,

Marc Peterson

[balaji.bandi]

as per the output the port does now show any SFP in it, either port might have gone bad.

show idprom interface ten 1/1/3 details and 1/1/4 ( see the difference)

show diagnostic switch 1 detail   ( see any F)

[marcp5693]

Yes, I'm afraid its probably the slot.  show idprom int te1/1/3 just returns with no output.  show idprom int te1/1/4 has the expected output showing the SPF info.

Thanks,

Marc Peterson

[balaji.bandi]

show diagnostic switch 1 detail 

You may see the port Failed to pass the test.

if this new then TAC case for replacement.

[marce1000]

- Connect to the 3650 with : https://cway.cisco.com/cli/  , through SSH , at the top left or run or press System Diagnostics.

 M.

[marcp5693]

This switch is in production so I can't take the downtime to do the full diagnostics now.  I'll have to schedule an outage.

I'm going to assume that this is a dead slot, and look at getting a replacement switch, its going out of support this October so it's a good reason to upgrade now anyway.

Thanks,

Marc Peterson

[marce1000]

      - The mentioned procedure (using CLI Analyzer) is not disruptive.

 M.

[marce1000]

     - Try freezing speed of the particular port to 10g

 M.

[marcp5693]

Setting the speed to 10000 and doing shut/no shut didn't work.  The switch still doesn't see the SFP.

Thanks,

Marc

[Leo Laohoo]

---

@marcp5693 wrote:

I'm going to assume that this is a dead slot, and look at getting a replacement switch, its going out of support this October so it's a good reason to upgrade now anyway.

---

This is a very well known issue with IOS-XE:  Cold reboot (pull the power cable) the switch.