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SFPs not working

Level 1
Level 1

Hi All, I have a really bizarre problem.


On one site we have a Cisco WS-C3750X-48P stack with C3KX-NM-10G modules and some SFP modules. Some are from Cisco (SFP-10G-SR) some are 3rd party. We are running software 15.2(4)E5. Everything works fine.


One another site we just installed C3KX-NM-10G modules and got some refurbished SFP-10G-SR from Cisco. I managed to add them to My Devices, so the serial numbers are known, and they show up as refurbished modules.

Cisco MyDevices 2018-08-21 08-59-55.png

However, when I insert those modules into the WS-C3750X-48P stack (running 15.2(2)E8 this time) I get the following error:

1334: 001373: 000067: Aug 21 06:12:20: %GBIC_SECURITY_CRYPT-4-ID_MISMATCH: Identification check failed for GBIC in port Gi2/1/1 (DBSGSW-02-2)


And the modules are not visible when I do show inv, or even show inv raw


Same thing happens on Cisco 3650 with 16.3.6 software:

272: *Aug 21 07:02:13.549: %PLATFORM_PM-6-MODULE_INSERTED: SFP module inserted with interface name Te1/1/1
273: *Aug 21 07:02:13.549: %GBIC_SECURITY_CRYPT-4-ID_MISMATCH: Identification check failed for GBIC in port 49
274: *Aug 21 07:02:17.596: %PLATFORM_PM-6-MODULE_INSERTED: SFP module inserted with interface name Te1/1/2
275: *Aug 21 07:02:17.597: %GBIC_SECURITY_CRYPT-4-ID_MISMATCH: Identification check failed for GBIC in port 50


But in this case I can at least see them under "show inv".


Do you guys have any idea what is happening here?




1 Accepted Solution

Accepted Solutions

Just wanted to update with a solution, in case someone finds this topic in future.

The solution was actually very silly... I was configuring the switch remotely, asking my colleague to insert the modules. I asked him to insert them in slots 1 and 3 on the C3KX-NM-10G module, and they should be inserted in slots 2 and 4....



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