New KVM install, br0 not active

Submitted by sfatula on Fri, 02/01/2013 - 12:17

So, installed cloudmin gpl on a centos 6 minimal install. All went ok, except, br0 was not active and cloudmin said no kvm could be created without a valid bridge interface. I looked over the network config in webmin, and found the issue. The netmask was blank on br0 so the network interface could not be activated. I set the netmask to the same netmask as eth0 and it came up.

Having never used cloudmin, hopefully, this is the correct solution.

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Comments

Submitted by JamieCameron on Fri, 02/01/2013 - 17:05

That's odd, the netmask for br0 should get copied from the mask setup for eth0 at the time the install script was run.

Do you happen to recall if your system's /etc/sysconfig/network-scripts/ifcfg-eth0 file had a NETMASK line previously?

Submitted by sfatula on Fri, 02/01/2013 - 17:17

I would guess it did since I was able to ssh to the server and that is the only network port. Without that line, I would think I would not be able to ssh into the machine? But, I suppose can't be sure since it was a new install.

Submitted by JamieCameron on Fri, 02/01/2013 - 17:42

Ok, I will add code to ensure the netmask is set properly if it cannot be auto-detected at install time..