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Cisco Bug: CSCvt58384 - ARP packets in RSPAN vlan are punted to CPU

Last Modified

Sep 01, 2020

Products (1)

  • Cisco Catalyst 2960-X Series Switches

Known Affected Releases

15.2(7)E

Description (partial)

Symptom:
2960X starts punting ARP packets in RSPAN traffic to CPU. You will be able to see high CPU on the switch under  HULC DAI Process and Hulc LED Process. This traffic would be punted to routing-protocols queue of the CPU.

Conditions:
RSPAN configured on the switch. The switch can be a pass through for RSPAN traffic or the RSPAN destination, either case the issue is seen.
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