How do I add more than two IP address under Suse Linux Enterprise Server (SLES 10) or OpenSuse Linux?
Under Suse / OpenSuse Linux you need to use a tool called YaST to add multiple ip address to ethernet interface.
Open terminal (if it is a remote box, use ssh).
Login as root.
Type the following command to configure LAN interface using YaST:
# yast2 lan
Press Alt+N to goto the Next page:
Now use [Tab] key to select interface such as eth0 or eth1.
Press [ALT+I] to edit interface such as eth1.
Press [Alt+V] to select Advanced option.
Select Additional Addresses.
Press [Alt+D] to Add additional address.
Now input the IP Address in the following box. Input the Netmask in the last box.
Press [Alt+O] to continue through OK box.
Press [Alt+N] for the Next screen session.
Finally, review the new configuration and press [Alt+F] to Finish the configuration. YaST will go through and update your configuration files and bring up your network interfaces.