Niels Thykier
2013-Nov-01 21:25 UTC
[Pkg-xen-devel] xen: Issues with Networking on virtual hosts with Xen.3.0.3-1
Control: reassign -1 src:xen Hi Stephen, You filed this bug against xen-utils-3.0.3-1, but such a package does not exist in Debian. My guess is that it was once built from xen and I have (tried to) reassign it accordingly. That said, at first glance if your problem is related to a package from Debian etch. Unless this problem can be reproduced in a newer version of the package, the maintainers of xen may close it as-is since Debian no longer support etch (and haven't done so for quite a while). Even if the problem can be reproduced, the fix will probably not be distributed via Debian's mirror. For the benefits of the maintainers, Stephen's report was: """ We have a major issue at present which i'm finding difficult to resolve. I have 3 x physical hosts all running Debian Etch and Xen 3.0.3-1 hypervisor on each running 4 x Debian Etch Virtual Machines. The hypervisor is configured with network-nat and vif-nat. These hosts have been inherited by me to look after from a previous colleague. They have been working fine with no traffic issues for the last 2 years up until the last week whereby I noticed virtual machines just randomly dropping their connection to the host and vif generated interface. It drops the connection for approx 30-40 seconds (sometimes longer) and the all of a sudden decides to kick in and work again. I can still connect to the virtual machine via xm console machinename.domainname.com and logon whilst it looses it's network connection. On the virtual machine i run a ifconfig and it shows the correct IP / Mac, however when i run route -n it struggles and hangs to get the gateway address (ie; the VIF for the host). I can ping the virtual machines static IP address, but can not ping the default gateway (ie; the VIF). When i run a tcpdump on both the virtual machine eth0 and the physical host vif interface i can see a load of arp requests on both. ie; who-is at xx.xx.xx.xx tell xx.xx.xx.xx. After 30-40 seconds it decides to clear itself and continue the traffic. It must have been a long standing issue over the 2yrs however as we are generating more and more traffic to the virtual machines i think it's becoming overloaded and stopping the VM from accepting any incoming/outgoing connections until it clears itself somehow. Problem is i don't know how to troubleshoot this within Xen. I tried using the xen-bugtool however i get a python error stating "ImportError: No module named xen.util". What steps do i need to carry out to troubleshoot and resolve my issue? """ ~Niels
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- Processed: Re: xen: Issues with Networking on virtual hosts with Xen.3.0.3-1
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- Processed (with 4 errors): Re: Bug#469811: xen-hypervisor-3.0.3-1-i386-pae: kernel BUG at drivers/xen/core/evtchn.c:481
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