Xen users - Aug 2010 - domU networking problem (corrected with more data)

[oops - hit send before adding details about latest test]

Hi Folks,

I have a DomU that was working just fine, but now it seems unable to 
obtain a network address.

On boot, I''m getting a series of DHCPDISCOVER messages in the log, 
followed by "No DHCPOFFERS received."

But... the router/dhcpserver seems to be working:
- other machines on the same LAN are picking up addresses
- I released and then renewed Dom0''s lease, and it worked just fine

But now, after a reboot, the DomU no longer seems to be able to reach 
the DHCP server.

Just to make things even weirder, I just created a clean DomU, and IT 
can''t pick up an IP address either.

I''m guessing that something I installed in Dom0 (xnest possibly) messed
up something about my virtual networking configuration - but I can''t 
figure out what.

Any suggestions on what might be going on, or how to diagnose things?  
I''m not completely clear on all the various steps a DHCPDISCOVER
message
goes through - as it flows through all the virtual networking "stuff"
-
particularly before an IP address is assigned and everything is at the 
virtual ethernet level.

Thanks Very Much,

Miles Fidelman

-- 
In theory, there is no difference between theory and practice.
In<fnord>  practice, there is.   .... Yogi Berra



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users