[CentOS] A bridge problem
Gordon Messmer
yinyang at eburg.com
Wed Jun 15 23:03:44 UTC 2011
On 06/13/2011 11:02 AM, m.roth at 5-cent.us wrote:
> We just went to replace the bridge/firewall services one one server with
> the same on another. It's pretty simple, and I literally cloned (w/ rsync)
> a third server that does this onto the one that will be the new one. Then
> copied the /etc/sysconfig/iptables from the one being replaced, and
> brought it up this morning.
Specifically what did you rsync? If you copied the ifcfg files, you
probably need to adjust the HWADDR in each. If you didn't get all of
/etc, you might need sysctl.conf. I'm guessing that's the case, given
the symptoms and the fact that you had to also copy the iptables file.
> ifcfg-eth0
>
> DEVICE=eth0
> BRIDGE=br3
> BOOTPROTO=dhcp
> HWADDR=aa:bb:cc:dd:ee:ff
> ONBOOT=yes
There should not be a BOOTPROTO in this file.
> ifcfg-br3
>
> DEVICE=br3
> ONBOOT=yes
> TYPE=Bridge
> BOOTPROTO=static
> IPADDR=<our ip>
> NETMASK=255.255.254.0
> NETWORK=<our nw>
> GATEWAY=<our gw>
You don't need NETWORK here.
It would also be helpful to see the contents of /etc/sysctl.conf or the
output of:
# cat /proc/sys/net/ipv4/ip_forward
# cat /proc/sys/net/bridge/bridge-nf-call-*
# brctl show
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