I need to allocate public IP address to two guest os. I have only 2 network card Interface on server. say eth0 and eth1. I set eth1 a public IP address. so it should in # vi /etc/sysconfig/ifcfg-eth1 DEVICE=eth1 BOOTPROTO=static HWADDR=00:1a:4d:83:ad:00 BROADCAST=202.127.29.0 IPADDR=202.127.29.5 NETMASK=255.255.255.0 NETWORK=202.127.29.0 ONBOOT=yes TYPE=Ethernet Question 1: do I have to add GATEWAY=202.127.29.1 to above setting? now continue to set eth0,seems I would use it as bridge ,so ifcfg-eth0 would be: # vi ifcfg-eth0 DEVICE=eth0 HWADDR=00:1a:4d:83:ad:50 ONBOOT=yes BRIDGE=br0 There's no IP address in this ifcfg-eth0. so Question 2: do I need to add the rest 2 IP addresses in br0? or I should keep br0 with no IP address and set IP in guest OS directly? Could anybody tell me how to set br0 to let host os and 2 guest os all have their own dedicated IP address? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20091211/e49876e7/attachment-0005.html>