OSPF Issues

RouterOS General
1

Side A: CCR1016-12S-1S+ (v6.28)
Side B: CCR1009-8G-1S-1S+ (v6.32.1)

I have setup a PtP link between 2 routers labeled Side A and Side B above using a /30 network. There are many routers connected to Side A utilizing OSPF that are working fine and not throwing errors. The connection between Side A and Side B though is throwing error messages in the log files of both routers (bunches, 20+ at random periods of time). I created a filter to try to capture what was happening and I have included a screenshot of the log. I have marked out the IP address from the log file and what I am capturing is ospf traffic sourcing from the WAN IP and sending to a multicast IP. I have also included a screenshot of my OSPF interface configuration (point-to-point with authentication) as well. This is a fiber connection to a remote site and I cannot see any physical link errors on either side of the link. I also cannot find any ospf configuration issues and need some help.

2

You seem to imply that this is a new fiber setup to a new site. You might try a NBMA neighbor setup so that multicast is removed from the equation. If your fiber is some sort of metro-LAN service, you might be seeing the multicast reflected.

Joe

3

It is a metro-LAN service from a carrier I have never worked with before. I think you are describing exactly what I am seeing. I have never set a side as NBMA so I will look at how that is setup and see if it solves my issue.

Gilbert

4

The issue was the Metro-LAN service. The carrier that I was using actually fixed the issue within their network that was causing the reflection and the short time that I was switch to NBMA I had no drops or errors.

Thank you for the help.