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xen-devel
[Xen-devel] Re: [PATCH]Change default network schema in network-bridge
On Tue, Jun 23, 2009 at 01:07:24PM +0800, Zhigang Wang wrote:
> hi,
>
> the default network-bridge renames network interfaces and often confuse
> people.
>
> this patch changes the network-bridge schema to:
>
> # start:
> # Creates the bridge
> # Copies the IP and MAC addresses from netdev to bridge
> # Enslaves netdev to bridge
> #
> # stop:
> # Removes netdev from the bridge
> # Transfers addresses, routes from bridge to netdev
> # Deletes bridge
>
> No rename will be performed. Eg.
>
> # brctl show
> bridge name bridge id STP enabled interfaces
> xenbr0 8000.000e0cd85dfe no eth0
>
> IP/route will be transfered to xenbr0 at start.
>
> I also add a extra script network-bridges to perform on all ethernet cards.
> and network-dummy if user doesn't want to xend to manage dom0 networking.
>
> This patch obsolete my last patch, titled: [PATCH]Fix network-bridge ifup
> problem.
>
> CC to Daniel for comments.
I agree with your thought that it makes more sense to just leave the
original device name alone, and not rename anything. The reason it
currently does renaming is that this was closer to the previous version
of network-bridge using netloop, and so made upgrades slightly easier
for existing Xen users.
I don't really have a strong opinion on whether network-bridge should now
be changed again to not do renaming of eth0. These days my recommendation
is for people to set '(network-script /bin/true)' and then just use their
OS distributions network scripts to add a bridge device. The end result
is the same, but this has the advantage that the network is setup correctly
right from start, rather than having to modify it on the fly when apps may
already have started using the network. We've got docs for Fedora/RHEL/
Debian/Ubuntu here
http://wiki.libvirt.org/page/Networking#Bridged_networking_.28aka_.22shared_physical_device.22.29
Regards,
Daniel
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