Re: [Xen-users] Bridge networking in Debian

[Alexandre Kouznetsov <alk@xxxxxxxxxx>]

Hello.

El 19/05/13 20:19, James Triplett escribió:
> Following instructions in /usr/share/doc/xen-utils-common/README.debian,
> I created a /etc/network/interfaces file like this:
>
>       auto br0
>       iface br0 inet static
>       address 192.168.0.26
>       network 192.168.0.0
>       netmask 255.255.255.0
>       broadcast 192.168.0.255
>       gateway 192.168.0.1
>       bridge_ports all
This looks pretty nice, should work as is, maybe with few corrections:

1. The specification of "network" and "broadcast" may be safely omitted, 
ifupdown scripts do excellent job deducing this parameters. Omitting 
them leaves you less room to make a mistake.
2. Consider adding "bridge_stp off" parameter.
http://wiki.xen.org/wiki/Xen_Bridge_Loop#Why_STP_is_turned_off.3F

3. Specify "eth0" in bridge_ports, it would make things more explicit.

4. IMPORTANT Make sure eth0 is not configured elsewhere. Comment out any 
"auto eth0" or "allow-hotplug eth0" (contrary to what Adam Goryachev 
suggested) in /etc/network/interfaces. Make sure any network automated 
configuration tool is turned off, such as Debian's NetworkManager.

> Does anyone know the correct configuration in /etc/network/interfaces for
> a dead-simple bridge to support Xen domU's?
A simple and clean starting /etc/network/interfaces would look like this:
##allow-hotpug eth0
#iface eth0 inet static
#  address 192.168.0.26
#  netmask 255.255.255.0
#  gateway 192.168.0.1
auto br0
iface br0 inet static
  address 192.168.0.26
  netmask 255.255.255.0
  gateway 192.168.0.1
  bridge_ports eth0
  bridge_stp off
#<and nothing else>

Greetings.

--
Alexandre Kouznetsov


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