Re: xen domU reboot affects other domU's

[Jukka Marin <jmarin%embedtronics.fi@localhost>]

On Fri, Jul 18, 2008 at 09:45:54AM +1000, Sarton O'Brien wrote:
> On Thu, 17 Jul 2008 04:25:19 am Jukka Marin wrote:
> > I had to reboot my winxp domU and noticed that all NetBSD domU's stopped
> > pinging for about 30 seconds during winxp reboot.  Dom0 was responding
> > to ping all the time.  Also, the domU's ping from dom0 (but not from LAN).
> 
> I just thought I'd mention that I did used to see this and I've never used 
> hvm. I never investigated and the only config change that I've done, that 
> _may_ have effected this was to removed stp from the bridge config.
> 
> All I really know is that it's not happening anymore ... and I'm on current 
> with a bge interface. It was quite a long time ago too (mid to late 2007 
> maybe).
> 
> Sarton

On Fri, Jul 18, 2008 at 10:35:55AM +1000, Daniel Carosone wrote:
> 30s sounds a lot like an STP forwarding timeout on the switch and/or
> bridge(4) after a topology change - maybe nothing to do with Xen at all.
> --
> Dan.

Indeed.  I disabled STP and rebooted two domU's (includinn winxp) and
no packets were lost any more.  I don't think I need STP, so this is an
acceptable workaround for me.

I was going to use additional Ethernet ports and multiple bridges to
get rid of the packet loss, but it turned out that the two ports I have
did not work (my posts to tech-kern).

Thanks for the help!

  -jm