Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am running CentOS 6.3 with NetworkManager disabled.

I was trying to set up a network bridge to try out setting up guests w/ kvm. I was creating a bridge before setting up stuff with kvm, just since I wasn't too familiar with it. Something didn't go right and I couldn't ping the gateway ip or anything past it with the bridge in place. The ip, netmask, and gateway are all correct. Before this bridging, the network worked fine.

I created the bridge (ifcfg-br0)


then I edited the ifcfg-eth0 and removed the ip, netmask, gateway, from there and set it to bridge br0. I restarted network, then used brctl show to see that the bridge was made. It showed up in there. This is the point in which I couldn't ping my gateway or anything past.

Since that didn't work, I figured I would just remove the bridge and not mess around with that anymore. I used brctl delif br0 eth0 and brctl delbr br0 to remove the bridge. Then I deleted the ifcfg-br0 file and added the ip, netmask, and gateway back into the ifcfg-eth0 file.

Now, I still can't ping the gateway or anything past it from this machine. route -n shows the same route that was in place before I started adding a bridge.

Currently, I am accessing the server console through ipmi. Any help with what to look for that could cause this hiccup?

share|improve this question
What is the output of "brctl show" – user26530 Oct 29 '12 at 18:18

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.