Hi all,

I replaced a core router last night (from RB1100 to CCR1016-12S-1S+) and am now getting an OSPF Authentication problem on v6.23.

OSPF comes up for a few seconds then starts discarding packets saying in the log that there's an authentication problem. This has forced me to disable authentication which I do not want.

This happens on all interfaces of the replaced router. I've created fresh OSPF config over an EOIP to a test router (we're in a production environment so can't really change core OSPF stuff live) and it still has the same issue. I've also downgraded to v6.15 and also still the same problem.

Date & time are both synced to same NTP server and timezones are identical.

Can anyone assist or maybe shed some light on why this would happen?