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xen-devel
Re: [Xen-devel] network root bridge problem
> In trying to get dom0 running diskless, i've come across the problem
> where for a short time there is no network connectivity and so iscsi is
> unreachable. What is the accepted workaround? I can think of the
> following:
>
> . do it in initrd. I'd rather not put this sort of setup info in the
> initrd though.
You could allow your initrd to take configuration parameters from
the kernel command line (they're available as environment
variables in the linuxrc).
> . patch brctl to do it in one hit. Looks easy but is it safe? Someone
> mentioned that the whole exe may not be loaded at that point and so
> could fail to load the rest if it needs to.
If you're hacking brctl you could mlock the pages.
> . patch the kernel to support an 'add if to bridge + migrate address'
> ioctl. This is probably best and looks pretty easy via an extra
> parameter to the existing addif ioctl.
Rather than doing this, I'd be inclined to hack the bridge code
such that packets to a local IP are received rather than
bridged. The current situation is at best inconsistent, where if
a bridged interface has an IP address the host can still send
packets with that IP on the interface, but it just can't receive.
I'm not convinced that's the intended behaviour...
Ian
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