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Cisco Bug: CSCuq09078 - Hsrp move active/standby from vpc domain to another leaves gmac

Last Modified

Sep 17, 2019

Products (13)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 93120TX Switch
  • Cisco Nexus 9504 Switch
  • Cisco Nexus 3164Q Switch
  • Cisco Nexus 3172TQ-XL Switch
  • Cisco Nexus 9508 Switch
  • Cisco Nexus 9332PQ Switch
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Known Affected Releases

6.1(2)I2(2b) 6.1(2)I3(0.178) 7.0(3)I1(1) 7.0(3)I1(3)

Description (partial)

Two different symptoms have been seen:
1) Traffic destined to VIP is looped on a backup/ listening/ standby switch
2) VMAC is programmed in hardware as a gateway MAC on backup/ listening/ standby switch

Two vPC pairs are L2 adjacent to each other, each pair is enabled for FHRP in the same group. 
Traffic destined to VIP is received on backup/ listening/ standby which has gateway MAC configured in hardware, at this point the traffic will loop in software. No operational impact.
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