I've just tried to migrate my RB4011 from 6.49.2 to 7.1.1 most of the config upgraded fine with the exception of my routing table had routing marks for PCC and also all the OSPF and BGP config got dropped so I would have needed to invest more time in rebuilding this config in 7 so I ended up just net installing back to 6.
is this anything I can put in place before re-doing the upgrade which would help retain any of this config?