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Cisco Bug: CSCur56395 - 2960X: Link may go down randomly with GLC-T in uplinks

Last Modified

Nov 19, 2020

Products (2)

  • Cisco Catalyst 2960-X Series Switches
  • Cisco Catalyst 2960-X Series Switches

Known Affected Releases

15.1(2.0) 15.2(2)E

Description (partial)

Symptom:When a Catalyst 2960X inserted into a stack with stack cable, uplink ports may go down randomly.

"show idprom" gives the following error after link goes down:
hulc_sfp_iic_intf_read_eeprom sfp _index 3 yeti_iic_read_retry fail

The switch may report "%ILET-1-DEVICE_AUTHENTICATION_FAIL" error.

Also the stack module fails device authentication, with following errors:

%ILET-1-DEVICE_AUTHENTICATION_FAIL: The FlexStack Module inserted in this switch may not have been manufactured by Cisco or with Cisco's authorization. If your use of this product is the cause of a support issue, Cisco may deny operation of the product, support under your warranty or under a Cisco technical support program such as Smartnet.  Please contact Cisco's Technical Assistance Center for more information.

or 

%ILET-1-AUTHENTICATION_FAIL: This Switch may not have been manufactured by Cisco or with Cisco's authorization.  This product may contain software that was copied in violation of Cisco's license terms.  If your use of this product is the cause of a support issue, Cisco may deny operation of the product, support under your warranty or under a Cisco technical support program such as Smartnet.  Please contact Cisco's Technical Assistance Center for more information.

This issue may also be seen with Catalyst 6800IA/FEX also.

Conditions:This issue is seen in Catalyst 2960X/6800IA platforms with GLC-T or other SFPs are plugged into uplink ports.

This issue may also appear without SFP/GLC for the above platforms

Related Community Discussions

<key>CSCur56395</key> - 2960X Link may go down randomly with GLC-T in uplinks
I see this bug happening even on fixed IOS version 15.0(2a)EX5. Using 1000BASE-SX SFP. Also the bug CSCul88801 is happening on IOS 15.0(2a)EX5 and both should be fixed.   Logs: hulc_sfp_iic_intf_read_eeprom sfp _index 1 yeti_iic_read_retry fail hulc_sfp_iic_intf_read_eeprom sfp _index 1 yeti_iic_read_retry fail hulc_sfp_iic_intf_read_eeprom sfp _index 1 yeti_iic_read_retry fail hulc_sfp_iic_intf_read_eeprom sfp _index 1 yeti_iic_read_retry fail hulc_sfp_iic_intf_read_eeprom sfp _index 1 yeti_iic_read_retry ...
Latest activity: Sep 08, 2015
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