On 07/12/2010 06:40 PM, Lionel Porcheron wrote:
> Le 12/07/2010 18:23, carlopmart a écrit :
>> On 07/12/2010 06:17 PM, Serge E. Hallyn wrote:
>>> Quoting carlopmart ([email protected]):
>>>> Hi all,
>>>>
>>>> I have a problem with an ubuntu lucid 10.04 server used for KVM
>>>> virtualization. My
>>>> problem appears when I try to configure an "empty" bridge in
>>>> /etc/network/interfaces
>>>> file. For example, with a RedHat based distro (RHEL, CentOS) I can create
>>>> a config
>>>> file ifcfg-br20 like this:
>>>>
>>>> DEVICE=br20
>>>> TYPE=Bridge
>>>> ONBOOT=yes
>>>> DELAY=0
>>>> STP=off
>>>> NM_CONTROLLED=no
>>>>
>>>> and then network startup script creates an empty bridge without bind
>>>> any physical
>>>> interface. I have tried same procedure to configure several empty bridges
>>>> under
>>>> ubuntu without luck:
>>>>
>>>> auto intprodif
>>>> iface intprodif inet static
>>>> bridge_stp off
>>>> bridge_fd 9
>>>> bridge_hello 2
>>>> bridge_maxage 12
>>>>
>>>> When i try to start this bridge with "ifup intprodif" command returns
>>>> me this error:
>>>>
>>>> car...@silmaril:~$ sudo ifup intprodif
>>>> Don't seem to be have all the variables for intprodif/inet.
>>>> Failed to bring up intprodif.
>>>>
>>>> How can I define an empty bridge without binding any physical
>>>> interface into it??
>>>>
>>>> Many thanks.
>>>
>>> man 5 interfaces says that for 'inet static', the following are required:
>>> address
>>> netmask
>>>
>>> Add those and see if it still complains?
>>>
>>> -serge
>>>
>>
>> Thanks Serge. I have changed static to manual and ... nothing happens. See:
>>
>> auto intprodif
>> iface intprodif inet manual
>> bridge_stp off
>> bridge_fd 9
>> bridge_hello 2
>> bridge_maxage 12
>>
>> .. and when I execute "ifup intprodif":
>>
>> car...@silmaril:~$ sudo ifup intprodif
>> Restarting openntpd: ntpd.
>> ssh stop/waiting
>> ssh start/running, process 8467
>>
>> .. doesn't returns any error, but if I execute "brctl show":
>>
>> car...@silmaril:~$ brctl show
>> bridge name bridge id STP enabled interfaces
>> car...@silmaril:~$
>>
>> ... bridge doesn't exists ... Any idea???
>>
>>
>
> I think you also want to precise which physical interface you're
> bridging. Here is the configuration I use:
>
> auto br0
> iface br0 inet manual
> bridge_ports eth0
> bridge_hello 2
> bridge_maxage 12
> bridge_stp off
>
> (then you need to bridge your vm on br0 in libvirt configuration files).
>
> Regards,
>
> Lionel
>
Thanks Lionel, but I need to setup a bridge WITHOUT binding a physical
interface.
--
CL Martinez
carlopmart {at} gmail {d0t} com
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