@aleksis thanks for following up. I have created the case, and I can upgrade to 7.23 but it would have to wait until the end of the week.
Another power outage forced the devices to resync... and after 8.5 hrs, ospf 2 resynced... with a sequence mismatch...
ospf-v4 { version: 2 router-id: 172.30.255.1 } Backbone { 0.0.0.0 } interface { p2p 172.30.255.1%VPLS } neighbor { router-id: 172.30.255.2 state: Full } sequence mismatch
Kinda feel like this is going to be leading to the problem.
After 5 minutes, there are 22k LS Retransmits, and on OSPF3 24k after 8.5 hrs
So in an effort to make this not a problem, I have added static routes to address this issue... but here is the issue in OSPFv3 as well.
ospf-v6 { version: 3 router-id: 172.30.255.1 } Backbone-3 { 0.0.0.0 } interface { p2p fe80::1afd:74ff:fe7d:232c%VPLS } neighbor { router-id: 172.30.255.2 state: Full } sequence mismatch
a large number of LSU retransmits may be due to the fact that the actual MTU in between the interfaces is less than the one configured in OSPF.
Check the real MTU between r1 and r2
MTU is set to 1500 on both...
ping 172.30.255.1 size=1500 do-not-fragment
SEQ HOST SIZE TTL TIME STATUS
0 172.30.255.1 1500 64 586us
1 172.30.255.1 1500 64 588us
2 172.30.255.1 1500 64 587us
3 172.30.255.1 1500 64 587us
sent=4 received=4 packet-loss=0% min-rtt=586us avg-rtt=587us max-rtt=588us