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Cisco Bug: CSCut08663 - Both ASAs in failover use the same MAC address

Last Modified

Mar 17, 2017

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

8.4(7) 9.0(4) 9.1(2) 9.1(4) 9.1(5.21) 9.1(6) 9.3(2)

Description (partial)

Symptom:
- If manually configured the "mac-address mac_address [ standby mac_address ]" within the physicall interface, bot ASAs active and standby will use the same active MAC address disrupting the traffic.
- If the "mac-address" command is used within the subinterface then both ASAs will negotiate properly the MAC address based on the failover state.

Conditions:
ASAs in failover with an interface using subinterfaces.
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