Cannot Migrate file even I already have CIFS connection...

I have one server with two host name ( host1.abc.xyz.com and host1.efg.xyz.com) point to the same IP address in two different DNS.  I have a celerra machine which is doing the same setting as the host server.  The celerra1.abc.xyz.com and celerra1.efg.xyz.com point to the same IP address.  I only created two CIFS connections (host1.abc.xyz.com <--> celerra1.abc.xyz.com and host1.efg.xyz.com <--> celerra1.efg.xyz.com).   But The migration has never happened.  I was wondering that do I have to have four different combination of CIFS connection in the connection list?