Bridged interface won't start on boot

serge · 03-31-2009, 06:36 AM

I am trying to setup a bridged interface (which I have done successfully in the past) on CentOS 5.2 x86_64

I have three configuration files:
/etc/sysconfig/network-scripts/ifcfg-br0

Code:

DEVICE=br0
TYPE=bridge
BOOTPROTO=static
BROADCAST=172.16.0.255
IPADDR=172.16.0.242
NETMASK=255.255.255.0
ONBOOT=yes
USERCTL=no
IPV6INIT=no
PEERDNS=no

/etc/sysconfig/network-scripts/ifcfg-eth0

Code:

DEVICE=eth0
BRIDGE=br0
ONBOOT=yes

/etc/sysconfig/network-scripts/ifcfg-eth1

Code:

DEVICE=eth1
BRIDGE=br0
ONBOOT=yes

Specs:

Code:

root@tst14 ~]# ethtool eth0
Settings for eth0:
        Speed: 100Mb/s
        Duplex: Full
        Link detected: yes
root@tst14 ~]# ethtool eth1
Settings for eth1:
        Speed: 100Mb/s
        Duplex: Full
        Link detected: yes
root@tst14 ~]# uname -a
Linux tst14 2.6.18-92.1.22.el5.centos.plus #1 SMP Wed Dec 17 10:49:19 EST 2008 x86_64 x86_64 x86_64 GNU/Linux

I have network in the correct runlevel

Code:

[root@tst14 ~]# chkconfig --list | grep network
network         0:off   1:off   2:on    3:on    4:on    5:on    6:off

after reboot

Code:

[root@ tst14   ~]# service network status
Configured devices:
lo br0 eth0 eth1
Currently active devices:
lo eth0 eth1

after manual start

Code:

[root@ tst14   ~]# service network status
Configured devices:
lo br0 eth0 eth1
Currently active devices:
lo eth0 eth1 br0

It says the following after boot in /var/log/messages related to br0

Code:

kernel: br0: Dropping NETIF_F_UFO since no NETIF_F_HW_CSUM feature.

I read something about setting UFO on br0.
I have no idea how to resolve this.

Any help is greatly appreciated