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Cisco Bug: CSCuo21422 - PROXY-ARP feature may drop incoming requests

Last Modified

Nov 12, 2020

Products (7)

  • CiscoPro Workgroup EtherSwitch Software
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch

Known Affected Releases

6.2(2a) 9.3(3) 9.3(5)

Description (partial)

When VRRPv2, VRRPv3 or GLBP group(s) configured on SVI interface, chassis may drop proxy-arp requests.    If suspecting such drops, "VIP is not active" counter of "show ip arp statistics vrf vrf_name" should be incrementing:
# show ip arp statistics vrf ABC
ARP packet statistics for context PSN
    Invalid proxy arp                   :  0
    VIP is not active                   :  10 <<<<
 Total 10, Requests 10, Replies 0, Requests on L2 0, Replies on L2 0           <<<<
 Proxy arp 6, Local-Proxy arp 0, Tunneled 0, Fastpath 0, Snooped 0, Dropped 10 <<<< 

Issue happens when proxy-arp configured on SVI interface together with VRRPv2, VRRPv3 or GLBP.
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Bug Details Include

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