Make sure you haven't duplicated your router id.


-----Original Message-----
From: AF <af-boun...@af.afmug.com> On Behalf Of Nate Burke
Sent: Tuesday, October 4, 2022 1:58 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Subject: [AFMUG] OSPF Pulling my hair out

I have a site with a RB4011 connected via an old M5 Powerbridge, and an EPMP 
PTP425.  The 4011 is running ROSv7, everything else is on ROSv6. Connecting to 
a CCR1036 and CCR1009 on the other ends of the radios.

Everything was working perfectly for several months until a storm came through, 
and now the F425 OSPF Session will not stay stable. The OSPF Weights are set to 
prefer the F425 link.  The OSPF neighbor never goes down, Adjacency/state never 
change, but the RB4011 will update it's entire routing table about every 5 
seconds and flap back and forth between the Powerbridge and the F425.  The 
remote routers never update the route to the 4011, it is stable over the F425.  
If I disable the
F425 neighbor, everything is stable over the powerbridge.  If I disable the 
Powerbridge neighbor, the router will lose connectivity for a second every 10 
or 15 seconds, like it loses it's routing table.

There is no packet loss across the F425 link, and it will Tik to Tik bw test at 
100MB sync no problem and no packet loss.  I've even tried changing ports on 
the 4011, plugging the F425 into a completely separate OSPF router on the 
remote end.  I've also put the traffic through a VLAN on the F425 to see if the 
F425 was doing something weird with the packets.  The F425 radios on both ends 
have been power cycled.  I've also updated ROS to the latest 7beta, and no 
change.

I'd think this is an issue with ROSv7/6 since the routing table keeps updating, 
but the powerbridge link is always fine, so it feels like something with the 
F425.  Especially since it happened after a storm. 
But at the same time, how could a failure of the F425 be affecting OSPF?  When 
I do OSPF Logging on the 4011, nothing is looking out of the ordinary.  I guess 
I could try physically changing the 4011, but I've never had a failure like 
that before.

Mainly I just want to vent that I'm probably missing something stupid, I just 
haven't been able to figure out what it is yet.


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