On Thu, Nov 05, 2009 at 12:03:01PM -0500, Tom Horsley wrote: > I have some very weird behavior with my new ubuntu 9.10 > virtual machines running as KVMs under fedora 11. > > I run testbeds on lots of different linuxii in ssh sessions > to virtual machines, and the ssh session just stops randomly > when talking to ubuntu 9.10 (no problem with 9.04, or 8.10, > no problem with various fedora versions or openSUSE versions).
Do the guests have libvirtd running inside them? libvirtd tends to create a default network (192.168.122.*) which conflicts with the host virbr0 network. This usually breaks networking completely -- I've not seen is cause hangs on an existing working network, unless ssh is hanging while something is starting up libvirtd. https://bugzilla.redhat.com/show_bug.cgi?id=509458 If not that, then these problems are often caused by specific classes of packets getting through (eg. packets that are too large, have broken checksums etc). So as Mark said, a tcpdump is vital to solve the issue. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://et.redhat.com/~rjones/virt-top _______________________________________________ Fedora-virt mailing list [email protected] https://www.redhat.com/mailman/listinfo/fedora-virt
