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

Last Modified

Feb 15, 2018

Products (7)

  • Cisco Nexus 7000 Series Switches
  • 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)

Description (partial)

Symptom:
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
/snip/
    Invalid proxy arp                   :  0
    VIP is not active                   :  10 <<<<
 Received:
 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 <<<< 
/snip/

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

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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