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Cisco Bug: CSCuw30334 - IPv6 Interface Incorrectly Registered as Duplicate

Last Modified

Jul 14, 2016

Products (1)

  • Cisco IOS

Known Affected Releases

15.1(3)S3.1

Description (partial)

Symptom:
IPv6 interface can be incorrectly registered as an duplicated address via duplicate address detection. Thus placing the interface within an tentative state and not assigning the IPv6 address to the interface.

show ipv6 interface te1/1.1111
TenGigabitEthernet1/1.1111 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::1:1
  No Virtual link-local address(es):
  Description: TAC TEST
  Global unicast address(es):
    11:123::3, subnet is 11:123::/64 [DUP] ------------------>Duplicate

Conditions:
This can be verified by issuing an [show ipv6 int brief] on the connected device and ensuring the interface isn't using the same IPv6 address.
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