So I looked thru dmrlink.cfg
Looking at the sample peer and sample master. If I want to designate the RPI2 as the master I should be able to use 127.0.0.1 then assign my repeater ip as the peer. I'll be on the same network so something like 192.168.x.x.
N1XBM
Apparare Scientor
Paratus Communicare
Allstar Node # 27086, 41540, 41812, 42086, 42658