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Cisco Bug: CSCvu16987 - ACI leaf reboots due to icmpv6 hap reset

Last Modified

Oct 11, 2020

Products (24)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 93120TX Switch
  • Cisco Nexus 93240YC-FX2 Switch
  • Cisco Nexus 9332C Switch
  • Cisco Nexus 9504 Switch
  • Cisco Nexus 9372TX-E Switch
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Known Affected Releases


Description (partial)

ACI leaf reboots due to icmpv6 hap reset
*************** module reset reason (1) *************
0) At 2020-04-23T15:29:35.450+05:30
    Reason: reset-triggered-due-to-ha-policy-of-reset
    Service:icmpv6 hap reset
    Version: 14.1(2o)

-icmpv6 cores were generated

This Issue is an side effect of an ARP/ND storm, initiated from an external hosts to the gateway IP of the switch, this storm causes the internal MTS buffer to buildup between ICMPv6 and EPM processes for a prolonged time, and leads to a crash of ICMPv6.
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