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[Xen-users] No no-local network connectivity

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Subject: [Xen-users] No no-local network connectivity
From: Glen Eustace <geustace@xxxxxxxxxxxxxx>
Date: Thu, 10 Jul 2008 07:24:26 +1200
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After having had quite a long period of stability, we had another incident yesterday where all of the DomUs on one of our servers lost the ability to connect to the outside world. They could ping each other and Dom0 which implies, to me, that the bridging was still working but for some reason the bridged NICs were cut off from the outside. External connectivity to Dom0 was still fine.

The Dom0 is running 2.6.21-7.fc7xen, with Xen version
All of the DomUs are running

Being a production environment, unfortunately, I could not do a lot of diagnosis. Rebooting the server brought everything back online.

If anyone has any ideas as to what might cause this I would love to know. Since installing Xen on this server, this has happened about 4 times in the last 18mths. The first time it happened, it seemed, that it may have coincided with higher (not heavy) than normal network traffic on one of the DomUs.
Glen and Rosanne Eustace
GodZone Internet Services, a division of AGRE Enterprises Ltd.
P.O. Box 8020, Palmerston North, New Zealand 4446.
Ph: +64 6 357 8168, Fax +64 6 357 8165, Mob: +64 21 424 015

"A Ministry specialising in providing low-cost Internet Services
to NZ Christian Churches, Ministries and Organisations."

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