[Xen-users] bad udp cksum by dns request in domU

[Torsten Z <torsten-z@xxxxxxxxxx>]

Hello

I use XEN 3.0 in debian sarge. I have a domU1 for routing and firewall. This 
domU1 use 2 network interfaces which is on a bridge 'gate' and the other on 
bridge 'lan'. 

dumU2 use one interface (eth0) on bridge 'lan'.

Then I make a ping out of domU2 to www.debian.de so I get no answer. The name 
isn't resolved. A ping to IP of www.debian.de works fine.
A ping on www.debian.de out of dom0 or a client in my LAN works fine. Only the 
resolving in domU2 crashed.

With tcpdump I see many [bad udp cksum 83ec!].
For example:
21:32:12.457805 aa:00:00:00:00:13 > aa:00:00:00:00:12, ethertype IPv4 
(0x0800), length 73: IP (tos 0x0, ttl  64, id 58967, offset 0, flags [DF], 
length: 59) 192.168.1.200.1045 > sns.kabel-bb.de.domain: [bad udp cksum 
626c!]  47711+ A? www.debian.de. (31)

I don't no what I can do to solve the problem. Any ideas?


Torsten

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