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Cisco Bug: CSCum52602 - IPv6 ND gets affected following IPv6 secondary address config sequence

Last Modified

Feb 27, 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(2)

Description (partial)

Symptom:
IPv6 neighbor discovery stops working when a secondary address with the same subnet mask of the primary address  is configured and unconfigured, the solicited address mc group gets deleted under the IPv6 interface.

Conditions:
The issue is seen when the user configures more than 1 IPv6 Address on an interface and each of them have the same 24 least significant bits. Since the last 24 bits for both the addresses in this case are same, it results in the same solicited node multicast address for both the global addresses configured on the interface. In this case ff02::1:ff00:1.
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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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