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Cisco Bug: CSCvt08994 - Switch ends up in a crash or high CPU while processing CTS egress policy of invalid SGT as -1 or ANY

Last Modified

Sep 23, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

15.1(2)SY

Description (partial)

Symptom:
High CPU or crash can be observed on switches running 15.1(2)SY.

Conditions:
This happens when we try to program the following SGT-DGT pairs on the device -

-1, <sgt>
<sgt>, -1

These are not valid SGT-DGT pairs from CTS point of view. This case can occur when ISE matrix is populated using an excel sheet import. The excel sheet can have incorrect entries in the above format which in turn get pushed to the device causing the issue.
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