err-disable

[Bhawani_Singh]

Hello,

I have a cisco 2960 plus series switch and an SFP module. When I plug SFP in port the port goes in err-disable. After a shut, no shut the port's LED blink for once and it goes down again and the following message appears on the terminal.

 %GBIC_SECURITY_CRYPT-4-VN_DATA_CRC_ERROR: GBIC in port Gi0/1 has bad crc
 %PM-4-ERR_DISABLE: gbic-invalid error detected on Gi0/1, putting Gi0/1 in err-disable state

Switch Model:  WS-C2960+24TC-L

SW Version: 15.2(2)E10

Boot Image: c2960-lanbasek9-mz.152-2.E10.bin

SFP: CISCO GLC-SX-MM

[Martin L]

check fiber optic cables. CRC_ERROR: - looks like that is L1 check message

[Bhawani_Singh]

fiber is fine and this is situation also persists even after removing the fiber cable or replacing with another one.

[Leo Laohoo · Accepted solution]

Contact Cisco TAC and get the SFP replaced. The SFP is bad.

[Bhawani_Singh]

hello leo,

this SFP is working fine in another cisco switch

[Leo Laohoo]

If the SFP works fine in another switch then leave it there. In a few days the problem will follow to the other switch.

[ddesai]

 I have same issue on 2 ports after shut and no shut still port in error disable mode, I am not using SFP any thoughts?