That did the trick. Thank you very much!

The external IP address does not show up in /etc/hosts anymore, but I guess thats ok:
Code:
[root@kusu1 ~]# genconfig hosts
# 
# Dynamically generated by: genconfig  (Do not edit!)
#
127.0.0.1       localhost.localdomain   localhost
10.0.0.1        kusu1.kusu      kusu1-eth0.kusu kusu1-eth0
10.0.0.2        compute-00-00.kusu      compute-00-00-eth0.kusu compute-00-00-eth0      compute-00-00
10.0.0.3        compute-00-01.kusu      compute-00-01-eth0.kusu compute-00-01-eth0      compute-00-01
10.0.0.4        compute-00-02.kusu      compute-00-02-eth0.kusu compute-00-02-eth0      compute-00-02
10.0.0.5        compute-00-03.kusu      compute-00-03-eth0.kusu compute-00-03-eth0      compute-00-03