One glitch remains that I can't fix. After a reboot, /etc/resolv.conf has nothing useful, even though dhclient came up fine on the bridge. Experimentation uncovered NetworkManager as the guilty party.
NetworkManager, AFAIK, doesn't know anything about virtual bridges. I had to set it up by hand:
[root@monster network-scripts]# cat ifcfg-vnet0 DEVICE=vnet0 TYPE=Bridge BOOTPROTO=dhcp ONBOOT=yes eth0 is bridged: [root@monster network-scripts]# cat ifcfg-eth0 # Intel Corporation 82573E Gigabit Ethernet Controller (Copper) DEVICE=eth0 BRIDGE=vnet0 #BOOTPROTO=dhcp HWADDR=00:30:48:FC:83:FA ONBOOT=yes OPTIONS=layer2=1 TYPE=Ethernet NM_CONTROLLED=no [ bunch more stuff snipped ] I also have eth1, which I would like to be owned by NetworkManager: [root@monster network-scripts]# cat ifcfg-eth1 # Intel Corporation 82573L Gigabit Ethernet Controller DEVICE=eth1 HWADDR=00:30:48:FC:83:FB ONBOOT=no BOOTPROTO=dhcp TYPE=Ethernet IPV6INIT=no USERCTL=no NM_CONTROLLED=yes PEERDNS=yesWhat's happening is this. The S10network script runs first, and brings up eth0 than vnet0; and configures the interface and /etc/resolv.conf from DHCP. Later S23NetworkManager runs, and removes my DNS server from resolv.conf, because none of the NetworkManager-owned network interfaces are up.
I want to use NetworkManager for eth1, but I'll have to either disable it, or bounce the network initscript after NetworkManager, which might cause some confusion elsewhere.
Is there a way to force NetworkManager not to touch /etc/resolv.conf.
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