Disabled GBIC SFP module

[lplatt010607]

I have 2 WS-3750-48PS switches in a stack, i have today installed 2 x MGBSX1 sfp's to link new fibre to other building on the grounds.

I have now got 2 types of error messages showing :-

EVENT NOTIFICATION -

Description: Gi1/0/3: This port has been disabled because Non Compliant  Gigabit Interface Converter (GBIC) connector detected.

Recommendation: Replace connector with cisco compliant Gigabit Interface Converter (GBIC) connector. Refer switch technical documentation to determine cisco compliant connector. Enable the port again.

SYSTEM MESSAGES

unfortunately i haven't got the full message but it was saying thet there was a CRC error in the EEPROM and that maybe a software update would rectify the problem.

The stack is running 12.2(35)SE5-IP-BASE software at the moment and i have seen on a Cisco page that ALL cwdm sfp's are compatible with my switches (http://www.cisco.com/en/US/products/hw/modules/ps4999/products_tech_note09186a00807a30d6.shtml#support3)

Should i upgrade the software to 12.2.55-SE3 ?

[Tom Randstrom · Accepted solution]

The reason for the Non Compliant error message is that the MGBSX1 sfp is not a "compatible" product with the WS-3750-48PS switch, per the following compatibility document:

http://www.cisco.com/en/US/docs/interfaces_modules/transceiver_modules/compatibility/matrix/OL_6981.html#wp137837

According to the document you referenced, the following statement may be the reason you are receiving CRC errors on the port.

"Use Third Party SFP Modules

The use of third party SFP transceivers with Cisco devices is not supported by Cisco. Cisco-approved SFP modules have a serial EEPROM that contains the module serial number, the vendor name and ID, a unique security code, and cyclic redundancy check (CRC). When an SFP module is inserted in the switch, the switch software reads the EEPROM to verify the serial number, vendor name and vendor ID, and recomputes the security code and CRC. If the serial number, the vendor name or vendor ID, the security code, or CRC is invalid, the software generates this security error message and places the interface in an error-disabled state."

Tom

[lplatt010607]

If it was a third party GBIC i could understand but i'm looking at a Cisco branded box with a Cisco Small Business sticker on it therefore it must be genuine Cisco bit of kit.

I'll have a word with my supplier and see if he can find / get hold another model based on the list given.

Thanks.