[SOLVED] Interface not added to bridge in CentOS 6.5

pingu · 05-12-2014, 10:40 AM

I'm installing CentOS-6.5 on a Dell R210 II to test oVirt.
After creating a bridge and configuring em1 for that bridge, the bridge comes up but without any interface.
I have to add it with "brctl addif ovirtmgmt em1" then everything is fine.
But after a reboot there's again no interface for the bridge.

I can't see where I'm going wrong?
I created the configfiles ifcfg-em1 & ifcfg-ovirtmgmt manually, NetworkManager is not installed, iptables is off, selinux is permissive.

Code:

[root@node1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-em1
DEVICE=em1
HWADDR=D0:67:E5:F3:5B:6F
Bridge=ovirtmgmt
UUID=e4c23576-7ef6-4f48-9672-e0d0b9892fb6
ONBOOT=yes
NM_CONTROLLED=no

Code:

[root@node1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ovirtmgmt 
DEVICE=ovirtmgmt
TYPE=Bridge
BOOTPROTO=static
IPADDR=192.168.120.112
NETMASK=255.255.255.0
GATEWAY=192.168.120.201
DNS1=192.168.120.201
DELAY=0
NM_CONTROLLED=no
ONBOOT=yes

After a reboot:

Code:

[root@node1 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
ovirtmgmt               8000.d067e5f35b6f       no             

[root@node1 ~]# ifconfig 
em1       Link encap:Ethernet  HWaddr D0:67:E5:F3:5B:6F  
          inet6 addr: fe80::d267:e5ff:fef3:5b6f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:48 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:7176 (7.0 KiB)  TX bytes:670 (670.0 b)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:34 errors:0 dropped:0 overruns:0 frame:0
          TX packets:34 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:3622 (3.5 KiB)  TX bytes:3622 (3.5 KiB)

ovirtmgmt Link encap:Ethernet  HWaddr D0:67:E5:F3:5B:6F  
          inet addr:192.168.120.112  Bcast:192.168.120.255  Mask:255.255.255.0
          inet6 addr: fe80::24a0:82ff:fe05:d4a5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:158 errors:0 dropped:0 overruns:0 frame:0
          TX packets:142 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:14402 (14.0 KiB)  TX bytes:12747 (12.4 KiB)

Fixing it:

Code:

[root@node1 ~]# brctl addif ovirtmgmt em1
[root@node1 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
ovirtmgmt               8000.d067e5f35b6f       no              em1
[root@node1 ~]# ifconfig 
em1       Link encap:Ethernet  HWaddr D0:67:E5:F3:5B:6F  
          inet6 addr: fe80::d267:e5ff:fef3:5b6f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:55 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:7737 (7.5 KiB)  TX bytes:734 (734.0 b)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:34 errors:0 dropped:0 overruns:0 frame:0
          TX packets:34 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:3622 (3.5 KiB)  TX bytes:3622 (3.5 KiB)

ovirtmgmt Link encap:Ethernet  HWaddr D0:67:E5:F3:5B:6F  
          inet addr:192.168.120.112  Bcast:192.168.120.255  Mask:255.255.255.0
          inet6 addr: fe80::24a0:82ff:fe05:d4a5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:158 errors:0 dropped:0 overruns:0 frame:0
          TX packets:142 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:14402 (14.0 KiB)  TX bytes:12747 (12.4 KiB)

ericson007 · 05-13-2014, 11:30 AM

Is the bridge in em1 not supposed to be all capitals? I always thought the directives left of the equal sign are to be. I know the options are case sensitive.

Does
/etc/udev/rules.d/70-persistent-net.rules

Agree with your naming convention? I had some strange behaviour on my bridge a while back that was caused by duplicate entries automatically being inserted into the rules set.

Maybe a typo in the uuid if manually typed? If you get rid of the uuid line is there any change?

But yes, I cannot pick anything obvious from your configs.

So before the fix does the bridge actually transmit data? Before the fix the bridge does have the correct mac address.

pingu · 05-14-2014, 07:08 AM

Quote:

Originally Posted by ericson007

Is the bridge in em1 not supposed to be all capitals? I always thought the directives left of the equal sign are to be. I know the options are case sensitive.

Yes of course!
Thanks, don't know how I could miss that but well, I did.
All capitals=problem solved.