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Re: [Qemu-devel] eth0 problems

From: Lonnie Cumberland
Subject: Re: [Qemu-devel] eth0 problems
Date: Sat, 28 Aug 2004 20:55:49 -0400
User-agent: Mozilla Thunderbird 0.5 (X11/20040208)

Hello All,

I just looked at the kernel sources for my 2.6.3-7mdk kernel and TUN/TAP has already been compiled in as a module.

Although there is no /dev/net/tun0 listed or /dev/tun0 as well

Actually, on I do not even see the /dev/eth0 even though it is now working on my cable modem and the ifconfig show that it is there.

Any other ideas?

Thanks for the help,

Jim C. Brown wrote:

On Sat, Aug 28, 2004 at 07:43:55PM -0500, Joe Menola wrote:
Technically, tun doesn't provide eth0 for the host either. In fact, the
kernel documentation says you need to have eth0 first, or else you cant use
tuntap (that may no longer be true though, remember this is from the
offical kernel docs :). tuntap provides a tun0/tap0 device in the host and
an eth0 device in the guest. user net should provide an eth0 as well, but
it won't add anything to the host.

If eth0 doesn't show, that may be due to lack of hardware support. Be sure
your kernel has support for the ne2k-pci module.

user net isn't just for internet access .. the guest can still access the
LAN or the WAN/intranet .. they just can't initiate a talk to it.

You're correct...nor can network shares be accesed?

Not sure. A node on the lan can't access shares on the user net guest, but
the guest may be able to access shares on the node ... this depends on the
protocol in question.

Windows shares have the additional complication that they have to be on the
same subnet, although I am not familar with Windows XP and above so they may
have removed this limitation (Samba removes this limitation if you set an option
in its config file).

Thanks for the correction.

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