hostname of server with multiple interfaces

We have a small network (runs on SLES8) with vlans in the 192.168.x.x
and 172.x.x.x range. Each server has several eth interfaces, no DNS
involved. In the /etc/hosts file, we have defined entries like

192.168.131.1 server1.int.domain server1.int
192.168.131.2 server1.ext.domain server1.ext
192.168.131.3 server1.nmc.domain server1.nmc
192.168.132.1 server2.int.domain server2.int
....

and so on. Right now we have the hostname of each server set to its
nmc interface, but we are not sure this is right. How to do this
correct? We need to connect to certain interfaces of some servers by
their name (i.e. server1.ext) even if the hostname (server1?
server1.nmc?) is different.
Eggert