http://webmasterperks.com/multiple-ip-addresses-one-interface/
http://www.mysidenotes.com/?p=14
Per SME Server vedi: http://www.sonoracomm.com/support/18-support/128-sme-alias-ip
Probabilmente non serve il comando:
cp /etc/sysconfig/network-scripts/ifcfg-eth0 \ /etc/e-smith/templates/etc/sysconfig/network-scripts/ifcfg-eth0\:0