We are in a situation that the master server will get a new Public IP-
address and subnet mask.
There are 3 slave-sides in total which will not change only the master

Which are the required steps to redesign the S2S configuration, and what
are the required steps on the slave-sides?

Master server
Bordermanager 3.8 with SP3 + ir1
Netware 6 + Sp5
Slave sides are on the same SP level.