[SOLVED] Bridge networking on RHEL

mcleandl · 09-28-2010, 08:27 AM

Hi All,

Trying to set up Bridge networking on RHEL 5.5 to support KVM virtual quest:

ifcfg-br0
DEVICE=br0
TYPE=Bridge
BOOTPROTO=static
GATEWAY=192.168.0.1
IPADDR=192.168.0.100
NETMASK=255.255.255.0
ONBOOT=yes

ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
TYPE=Ethernet
BRIDGE=br0

#brctl show
bridge name bridge id STP enabled interfaces
virbr0 8000.000000000000 yes
br0 8000.000e0cb30550 no eth0

For some reason the eth0 is picking up an dhcp address and not bridging through br0.

Any idea?

dave

MensaWater · 09-28-2010, 08:45 AM

Have you tried adding this line to your ifcfg-eth0?

Code:

BOOTPROTO=none

Also verify you don't have any saved copies of ifcfg-eth0 in /etc/sysconfig/network-scripts (e.g. ifcfg-eth0.old, .v01, .20100928 etc...). The network start script keys on files starting with "ifcfg-" so will try to start the NIC at the HWADDRESS in those files which is very likely to be the same one you have in ifcfg-eth0.

FYI: You CAN save copies in network-scripts by prepending rather than appending - e.g. old-ifcfg-eth0, v01-ifcfg-eth0, 20100928-ifcfg-eth0 etc... The important thing is that the copies don't start with "ifcfg-".

mcleandl · 10-06-2010, 06:47 AM

Such a quick reply to the thread. Thanks to MensaWater for pointing out the newbie problem with naming convention on network files in /etc/sysconfig/network-scripts/. Removed old copies of network file names and everything was good.