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Re: [Qemu-devel] network fails on windows

From: John R. Hogerhuis
Subject: Re: [Qemu-devel] network fails on windows
Date: Sat, 17 Jul 2004 13:55:44 -0700

On Sat, 2004-07-17 at 08:21, Julian Seward wrote:
> I agree, there is something funny to do with networking with
> WinXP/Win2K guests.  I use user-mode networking with the
> current cvs head.  Sometimes XP is able to make a connection
> to the outside world; yet if I just leave the guest machine
> idle and try an hour later then it can't; try again 5 minutes
> later and it's OK again.  It's very frustrating.  I have no idea
> what's happening.  Also, even when it can communicate with 
> other machines on my local network, it's really slow.
> Wierd thing is, running Red Hat 7.3 as a guest, with user-mode
> networking, the guest's connections to the outside world are
> both reliable and fast.  Which corresponds with Matthias' observation.
> Any ideas?  Has anyone else got any related observations?

If someone could post detailed tcpdump output somwehere the problem will
likely be apparent in the trace. When it comes to networking the trace
tells the story the best...

It would be good to have the TCP packets, ARP, DHCP, and any ICMP
packets in the trace. Try to filter out any noise from machines not

Anyway if someone posts it I'll take a look.

-- John.

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