Re: [Xen-devel] xen 2.0, networking, bridging, and nfsroot

[Sachin Goyal <sgoyal@xxxxxxxxxxx>]

I have never tried pxeboot or diskless linux, but I guess you can include
bridge tools (e.g brctl) in initrd image and configure the network card 
initially
itself in bridge mode before nfs mounting the real root.

sachin


On Tue, 10 Aug 2004, Adam Heath wrote:

> Our current setup(based on 1.0 and 1.2) uses completely diskless machines.
> They pxeboot, which then runs grub, which then loads xen.  dom0 and domN all
> do nfsroot, and everything is happy.
>
> So, along comes 2.0.  It now uses a normal bridge to connect dom0 and domN.
> However, the bridge has a hole, where the network does not exist, while it
> copies the addresses from eth0 to br0, and changes all the routes.
>
> In nfsroot mode, this fails, as suddenly the network is inaccessible, so
> brctl(and friends) can no longer be found.
>
> It would be more safe, to not use a bridge to configure access to the other
> domains; this would leave networking running at all times on dom0. Otherwise,
> if the bridge setup code breaks, you would end up with dom0 not accessible
> from the net, even in normal disk-bound situations.
>
>
>
>
>
>
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