We''re having issues with CentOS 5 with Xen, with multiple DomU''s. They will loose all connectivity at random times, and if we VNC into the Dom0, and generate some traffic from the domU''s console (such as using virt-manager to open a text-console and pinging a ip on the internet) then all the issues go away. This seems to happen once a day, sometimes more often. We haven''t found a reproducable pattern(or logs on the dom0) to it yet. The system is attached to a Cisco 7600. I''m not sure if this is the right place to ask given the symptoms, but perhaps someone can point me in the right direction. Smells almost like a timeout issue but I''m not sure at what layer, and I''m afraid I''m not an expert with brctl or xen yet. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi, 2012/1/18 Walter Keen <walter.keen@rainierconnect.net>:> We''re having issues with CentOS 5 with Xen, with multiple DomU''s. They will > loose all connectivity at random times, and if we VNC into the Dom0, andyou can try to use brctl bridgename showmacs at the instant you notice the issue again. If there is no entry for the VM''s vif / mac then you will have to look at the arp times of the bridge. Florian -- the purpose of libvirt is to provide an abstraction layer hiding all xen features added since 2006 until they were finally understood and copied by the kvm devs.
Niels Dettenbach (Syndicat IT&Internet)
2012-Jan-19 17:06 UTC
Re: Weird issue with Xen network interfaces
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Mark van Dijk <mark@internecto.net> schrieb:>Is STP enabled?...and just in addition to this: Could you send pls a brctl show of your bridge? STP usually should be off. cheers, Niels. - -- Niels Dettenbach Syndicat IT&Internet http://www.syndicat.com -----BEGIN PGP SIGNATURE----- Version: APG v1.0.8 iIEEAREIAEEFAk8YTaU6HE5pZWxzIERldHRlbmJhY2ggKFN5bmRpY2F0IElUJklu dGVybmV0KSA8bmRAc3luZGljYXQuY29tPgAKCRBU3ERlZRyiDV3rAJ0TFD6AMsCm L9jB19cAmXUB6N8UuQCeMMHv6uymkdRk+iMMZ1oRt6f/ylU=onCa -----END PGP SIGNATURE-----
Hi,> We''re having issues with CentOS 5 with Xen, with multiple DomU''s. > They will loose all connectivity at random times, and if we VNC into > the Dom0, and generate some traffic from the domU''s console (such as > using virt-manager to open a text-console and pinging a ip on the > internet) then all the issues go away.Is STP enabled?