having same issue here.
I am testing the upgrade of R80.10 MDS to R80.20, with several CMAs included. This means that my target (R80.20) has the same IP addressing as the Source - which is still in production. This gives us IP conflicts, so i provisioned the 'real' leading VIP to be on an isolated subnet, with a secondary interface being routable on a different subnet.
this worked just find for the build process. and the database successfully import, and the MDS processes are up.
however when trying to Smartconsole onto the secondary interface (which i also have tried to setup as a leading VIP) i get the 'faile do tfind domainip'.
the only solution i can think of, would be to destination NAT from a firewall: i.e, connect to 10.1.1.1 (IP owned/arped for on a firewall) and destination NAT it to this MDS's real IP 10.2.1.1. Obviously, this will need t obe an isolated DMZ otherwise i'll get the address conflict.
in my world however, i dont have a firewall between my PC and the MDS 'lab' i am building to.
hopefully someone will have a fix for this soon.