The RDNSS address seems to be configured on the other router but not on the local router. This is possible as a transient when configurations are being updated on multiple routes or as a persistent because of a misconfiguration in one of the routers
Check the configuration on appropriate routers and make any configuration updates as needed. Locally, configuration can be verified by issuing a 'show router-discovery <vlan-name>'. Configuration can be corrected by the 'configure <vlan-name> router-discovery [add|delete] rdnss <ipaddress>' command.
Warning
RDNSS Address Lookup failed for received Router Advertisement on vlan %vlanName% from %otherRouter% with a RDNSS Adddress %addr%
| Name | Type |
|---|---|
| vlanName | VLAN |
| otherRouter | IPv6 |
| addr | IPv6 |