/etc/nodename is probably incorrect. The following details are from a machine getting this error message. Note that /etc/nodename contains an alias to the real name of the SSP. To correct the problem, edit /etc/nodename to match the true name and reboot.
# cat /etc/nodename beer # cat /etc/hostname.qfe0 snax-ssp # cat /etc/hosts 127.0.0.1 localhost 18.104.22.168 snax-ssp beer loghost # cat /etc/ethers 8:0:20:87:58:a5 snax-ssp beer