[CentOS-virt] Xen Dom0 network fails to start at boot

Kai Schaetzl maillists at conactive.com
Mon Dec 15 15:31:29 UTC 2008

Adam Huffman wrote on Mon, 15 Dec 2008 14:21:36 +0000:

> If I execute 'service network restart', eth0 comes up 
> normally, with an IP address and the correct routing.

The network-scripts in the default CentOS Xen are buggy. For instance, I 
found that when you have two IPs with different subnets configured for 
Dom0 the DomUs won't be able to get an IP from your normal DHCP server. 
(Compare discussion on this list quite some time back.) I didn't see a 
problem with the network of the Dom0, though. 
Check dmesg and other logs for any bootup errors. Make sure that your 
network setup on the machine is 100% correct and all subnets have a 
dedicated gateway. Something that isn't 100% correct, but normally works, 
may not work with these network scripts.
I went to Xen 3.2 which has a completely revamped network/bridging 


Kai Schätzl, Berlin, Germany
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