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Cisco Bug: CSCut09976 - 6880 : VIF not created on FEX

Last Modified

Feb 24, 2018

Products (1)

  • Cisco Catalyst 6000 Series Switches

Known Affected Releases

15.1(2)SY4.1

Description (partial)

Symptom:
Users connected to particular fex are unable to communicate with rest of the network. Per "show int" output interface is in "connected" up/up state but packets sent to that interfaces are isolated.

Other easy to spot symptom is that MAC address learning is not happening.

Shut/no shut of affected interface is not helping.

To verify the problem below commands can be used:

On VSS itself check if VIF were assigned to each FEX module:

    test pla soft sw vir vntag_mgr fex-info <FEX-ID>

On FEX itself check if VIF is indeed assigned to ports on affected switch.

   test pla soft sw vir vntag_mgr fex-info 111

Conditions:
Multiple switches in FEX connected to VSS.
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