03-23-2010 07:46 AM - edited 03-06-2019 10:16 AM
I am replacing GLC-SX-MM modules about 5 every week. I have them installed on different platforms mainly Cisco switches C6500, C3560, C3750 and bought them from different Cisco Vendors. By the way they are the Cisco ones.
Any ideas?
03-23-2010 08:41 AM
Hey Francisco,
Did you notice any similarity between the vendors? The easiest way to do that would be by using the show idprom
There is a section in the output of this command which tells you what vendor they SFP's are from, whether they are Avago, Cisco-Finisar and so on and so forth.
When you say that they become faulty, what exactly happens? Do they stop passing traffic, do they stop getting detected?
Thanks
Pronoy
03-23-2010 08:49 AM
Pronoy,
The switches stop detecting the modules.
I will check the vendor using show idprom
Any other reason why switches could just stopped detecting? We always clean the fiber cables before plugging transceivers,
03-23-2010 09:17 AM
Pronoy,
I have checked one of the switches and i see CISCO-METHODE on one of the port and also CISCO-AVAGO on another port.
Could they be Non-Cisco SFP's with Cisco Tag!
03-23-2010 10:34 AM
Hello Francisco,
Cisco does not produce GBIC or SFP on his own, they are produced by other vendors and customized with a specific eeprom.
So first GBIC were made by HP/Agilent and others.
I can say we had similar problems with SFP in one big campus, and our guess was that we had the problem devices from a not very good production set.
To be noted GBIC are bigger and look like more robust they deal the same power in a much bigger space volume so they experience a much lower power density and a lower "burning" probability.
Hope to help
Giuseppe
03-23-2010 02:11 PM
Replace the SFP every five weeks???? I've never seen things happen like this! Any error messages from the appliance before the failure?
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