From mboxrd@z Thu Jan 1 00:00:00 1970 From: Travis Cross Subject: Re: Using non-hvm domU networking takes down dom0 external networking Date: Thu, 09 Feb 2006 12:01:47 -0500 Message-ID: <43EB757B.9050201@crosswirecorp.com> References: <1139340629121205513adam@ipcoast.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1139340629121205513adam@ipcoast.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: adam@ipcoast.com Cc: Xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org > 3. Have domU attempt to ping google, immediatly dom0's ping to google dies and > nothing short of reboot seems to be able to get it back. I was unable to reproduce your results on a Pentium D dual-core box running xen-unstable near the tip. You might ensure that IP forwarding is enabled (on dom0) with: # echo "1" > /proc/sys/net/ipv4/ip_forward The behavior of my networking was a bit quirky until I remembered to do this. Cheers, -- Travis Adam Wendt wrote: > Ever since the subarch changeset (8706) and through all the kernel versions > (.12.6, .14, .15, 16-rc1/2) and up through the latest changeset (8776) when I > start a non-hvm domU and ping outside the xen machine the dom0 can no longer ping > outside the machine (and domU fails from the start). > > Here's a step by step: > > 1. Start machine, start xend, start pinging google from dom0, all is fine, leave > this running > 2. Start non-hvm domU, ping its local address, ping the dom0 ip, all is still > fine and dom0 can still ping google. > 3. Have domU attempt to ping google, immediatly dom0's ping to google dies and > nothing short of reboot seems to be able to get it back. > > I have confirmed this on two separate machines with different network cards and > different motherboards, though both are em64t dual core chips. Changeset 8705 has > no problem but anything after that shows this behavior. > > My networking setup is about as stock as it comes, no firewalls, basic eth0 with > default network scripts, generic domU network configuration. > > Any ideas? > > Adam Wendt > IPCoast, Inc. > > > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel