Problems with OSPF

RouterOS Forwarding Protocols
1

I’m having some issues with OSPF advertizing routes through one of our WAN connections.
I have 2 interfaces at our corporate office and several remote locations that are being router via OSPF.

It works fairily well most of the time, however on some occcasions one of the interfaces stops receiving the advertized routes. On occasion if I disable the interface and enable again, I start seing the routes being polupulated, but other times I still don’t get those routes.

In my troubleshooting I have also notices some instances where the advertized route states one interface but if I do a tracert, it tries to route through the other interface.

Here is some info on the setup.
Corp router: RB493 V4.13
Remote routers: RB750 V4.11
Routes type 1


Any suggestions?

2

I believe you will want to upgrade both units to, at least 4.16. I have only been using MikroTiks since 4.16 has been available. I believe the forums have mentioned multiple OSPF issues with 4.x where x < 16, but it may have been x < 13. Don’t forget to upgrade the routerboard firmware after upgrading the RouterOS.

Also, if the version of RouterOS isn’t the problem, we are going to need to know:

What type of network connects the routers which are losing OSPF neighbor associations?

What OSPF network type are you using on those OSPF interfaces?

What state are your neighbors in when you are having trouble getting the OSPF neighbor adjacencies to come up?

What is in your logs?

Several different vendors’ wireless gear is, or have been, good at dropping multicast packets. OSPF tends to depend on multicast packets. You can sometimes improve your odds of achieving stability by using point-to-point, point-to-multipoint, or NBMA OSPF network types.

3

Well I’m having the same problems with 4.17. It seems to desregard the cost all together and chooses whatever random route it wants.

4

Hello, I´m also using this version of firmware, 4.17.
And I´m having the same problem, it´s amazing seeing that in the fact that the route doesn´t show the “host” addres but the interface address, try to ping with the port short-circuited. ( The ping will return YES ).

I´m seeing that the OSPF in Mikrotik only gets the actived and uped interfaces. It´s so curious.