Xen devel - Jun 2010 - [INFO] Setting up bridges in Debian /etc/network/interfaces

OK, after a bit of playing around, I managed to figure out how to set
up /etc/network/interfaces without the network-bridge script.  Below
is an example system that has 2 nics, one with a dynamic IP address
and one with a static IP, and two bridges, one for each nic.
Hopefully it will be of help to those affected by the xencommons /
xend config change. :-)

 -George

----
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

auto lo xenbr0 xenbr1
iface lo inet loopback

allow-hotplug eth0
allow-hotplug eth1

iface eth0 inet manual
iface eth1 inet manual

iface xenbr0 inet dhcp
 bridge_ports eth0

iface xenbr1 inet static
 address 192.168.1.1
 netmask 255.255.255.0
 network 192.168.1.0
 broadcast 192.168.1.255
 bridge_ports eth1

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On Fri, 2010-06-25 at 16:00 +0100, George Dunlap wrote:
> OK, after a bit of playing around, I managed to figure out how to set
> up /etc/network/interfaces without the network-bridge script.  Below
> is an example system that has 2 nics, one with a dynamic IP address
> and one with a static IP, and two bridges, one for each nic.
> Hopefully it will be of help to those affected by the xencommons /
> xend config change. :-)
There was an example added to the xend-config.sxp file in the commit
which made these changes (I missed it at first too).

I don''t think the references to "allow-hotplug ethX"  and
"iface ethX
inet manual" are necessary. All that should be necessary is the "auto
xenbrX" and the "iface xenbrX ..." bits which you have. e.g.
> auto lo xenbr0 xenbr1
> iface lo inet loopback
[...snip unneeded stuff...]
> iface xenbr0 inet dhcp
>  bridge_ports eth0
> 
> iface xenbr1 inet static
>  address 192.168.1.1
>  netmask 255.255.255.0
>  network 192.168.1.0
>  broadcast 192.168.1.255
>  bridge_ports eth1
It''s also probably worth drawing attention to the interfaces(5) and
bridge-utils-interfaces(5) man pages.

Ian.


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Well, there at least is one configuration that does work.  If someone
else wants to do some more testing to find out the minimum text
required, feel free. :-)

 -George

On Fri, Jun 25, 2010 at 4:07 PM, Ian Campbell <Ian.Campbell@citrix.com>
wrote:
> On Fri, 2010-06-25 at 16:00 +0100, George Dunlap wrote:
>> OK, after a bit of playing around, I managed to figure out how to set
>> up /etc/network/interfaces without the network-bridge script.  Below
>> is an example system that has 2 nics, one with a dynamic IP address
>> and one with a static IP, and two bridges, one for each nic.
>> Hopefully it will be of help to those affected by the xencommons /
>> xend config change. :-)
>
> There was an example added to the xend-config.sxp file in the commit
> which made these changes (I missed it at first too).
>
> I don''t think the references to "allow-hotplug ethX"
 and "iface ethX
> inet manual" are necessary. All that should be necessary is the
"auto
> xenbrX" and the "iface xenbrX ..." bits which you have. e.g.
>
>> auto lo xenbr0 xenbr1
>> iface lo inet loopback
> [...snip unneeded stuff...]
>> iface xenbr0 inet dhcp
>>  bridge_ports eth0
>>
>> iface xenbr1 inet static
>>  address 192.168.1.1
>>  netmask 255.255.255.0
>>  network 192.168.1.0
>>  broadcast 192.168.1.255
>>  bridge_ports eth1
>
> It''s also probably worth drawing attention to the interfaces(5)
and
> bridge-utils-interfaces(5) man pages.
>
> Ian.
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>
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