I recently had to use some none Cisco 10Gbs copper SFP’s in a 3850 stack. On inserting the SFP’s the interfaces went into err-disabled status and looking in the log I was getting the message “Warning: SFP gbic-security check fail” and “gbic-invalid”.

SFP gbic-security check fail gbic-invalid


Using the below commands I was able to get the device to not put the the interface into err-disabled when a non Cisco SFP was used.


I then had run a shut and a no shut on the interface, after that everything came up fine and everything looked good when looking at the capabilities of the interface.

Author: Phil Eddies

I am an IT Operations Manager, managing all aspects of the IT infrastructure and service for a mid sized UK based company. I have been working full time in IT since 2001 in 1st to 3rd line and System Administration roles. MCSA, MCSE, CCNA, Citrix CCA