Hello, After adding the br100 bridge via the brctl command, and adding the bridge interface information, the bridge br100 will disappear. root at compute1:~# brctl addbr br100 root at compute1:~# cat /etc/network/interfaces|grep -v "#" auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp auto eth4 iface eth4 inet static address 10.10.10.182 netmask 255.255.255.0 network 10.10.10.0 broadcast 10.10.10.255 auto br100 iface br100 inet static address 192.168.11.182 netmask 255.255.255.0 bridge_stp off bridge_fd 0 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20131024/17949f0b/attachment.html>