I have an OSPF link that seems to be working fine except one problem. It seems to continually go up and down every three or four minutes, see attached image. Anyone have a clue what could be causing this? Using a RB800 with ROS 5Beta1

-tp

try downgrading to V4.6? v5 is still beta

is it wired connection?

Some links are hardwired, one is a IPSec link using an IpIp tunnel.

-tp

I thought about that: http://wiki.mikrotik.com/wiki/Manual:OSPF-examples

We have 300+ locations running IPIP/IPSec and experience the exact same issue. Turned off IPSec and ran OSPF over unencrypted IPIP tunnels, same result. I have a ticket open with Mikrotik and they were supposed to fix it in 4.7. It didn't and now 4.7 is pulled from the shelf. Still waiting on a solution.

Scratch that, similar issue not exact same. Try this, drop the MTU on the IPIP interface and see if this fixes it. I have run into that as well and learned OSPF is VERY picky about fragmentation. Packet fragmentation on the IPIP tunnel will break OSPF connection.

I'm with the same problem using mpls-ospf-most in a single VPLS rb 433 version 4.9 turns and moves I see the error log already used both mtu 1522 as in 1526 all over this labeling continues in the same way and without dropping the connection link until he is so strange that this occurs when rb in other realemtne and why the link went down and came back.