Cisco Bug: CSCuw28154 - Need IPv6 support in "backup interface" command.
Mar 22, 2018
- Cisco IOS
Known Affected Releases
Symptom: When configuring an IPv6 address under the interface configured as backup interface for the primary interface with the command "backup interface <>" under the primary interface, we get the following message: %GigabitEthernet0/0/1: Informational: <IPv6 address> is in use on GigabitEthernet0/0/0 Conditions: Configuring same IPv6 address under backup interface.
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