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Cisco Bug: CSCvh68593 - Egress port for ARP is not updated after re-enabling MAC Learning in Nexus 9000

Last Modified

Aug 13, 2019

Products (52)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 31108TC-V Switch
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 3132Q-V Switch
  • Cisco Nexus 92304QC Switch
  • Cisco Nexus 3548-XL Switch
  • Cisco Nexus 9396PX Switch
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Known Affected Releases

7.0(3)I6(2) 7.0(3)I7(2) 7.0(3)I7(3)

Description (partial)

Symptom:
A Nexus 9000 (any N9K) running i7(2) migt not update the egress port of an arp entry after the mac learning process is re-enabled. This is commonly seen during a Firewall failover in which a gratuitous arp is expected to update the ARP entry and point all the traffic to the new active Firewall

Conditions:
1) Nexus 9000 using CloudScale ASIC
2) The mac learning process should be disabled and re-enabled
3) After re-enabling the mac learning process, the arp and mac entries should point to different phy interfaces
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Bug Details Include

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