Configuring bridges to use with KVM

[carlopmart]

On 07/12/2010 04:59 PM, carlopmart wrote:
> 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:
>
> carlos at 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.
>

Please, any ideas?? it is very urgent ...

Many thanks.


-- 
CL Martinez
carlopmart {at} gmail {d0t} com