We have an almost entirely Mikrotik routed network. We recently introduced an arista into our enviroment acting as an L3 router and imediatly found an issue regarding ospf-v3 adjacency. I then built a lab and was able to reproduce the issue with a strip down config. In this scenario once ospfv3 is establihed to the arista from mirkotik1, all subsequent OSPF-v3 sessions from mikrotik1 to neighboring mikrotik routers failed and got stuck in the execstart/2way state. If you disabled the ospfv3 session to the arista and restart the sessions to the neighbors mirkrotik routers, then the sessions come up and work normally.
So the issue appears to be, once adjancy is established from a mikrotik to the arista, after that all adjancies fail while the adjancies to the arista stays solid. I have tried multiple versions of mikrotik firmware including the latest bugfix 6.45.9. I have also tried multiple software version on the arista including the latest release of 4.24.0F. The issue presents itself in all configurations and it easily reproducable. i've engaged Arista support and it seems that because the adjancy to the arista is up and the only symptoms are off the mikrotik side, there is nothing they can do.
Wondering is anyone has any ideas of thoughts on how to move forward the troubleshooting process here...