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Re: [Qemu-devel] Re: [PATCH-updated] qemu/net: add raw backend
From: |
Jamie Lokier |
Subject: |
Re: [Qemu-devel] Re: [PATCH-updated] qemu/net: add raw backend |
Date: |
Wed, 14 Oct 2009 17:54:47 +0100 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
Michael S. Tsirkin wrote:
> > The fact that network manager does work well with bridged interfaces is
> > a network manager bug.
>
> Network manager was just one example.
Even if network manager and all other configuration programs are fixed
to handle a bridge, it's still quite fiddly to configure them.
I find I have to use
- bridges to an uplink interface for some VMs (guest has IP on same
network as host, fixed host interfaces, typically in servers)
- bridges attached to changing uplink for some VMs (laptop, where
the main internet uplink changes between eth0/wlan0/ppp0/bnep0
according to available signals)
- no bridge at all (just routing tap, used on all sorts of machines)
for VMs needing to run on host-local IPs and talk to the host,
and maybe NAT to the internet
- bridges not attached to any host interface, just multiple tap
interfaces, used to connect guests with host-local IPs that must
see each other's broadcasts
The corresponding iptables is rather tricky too.
> > It's getting fixed so in the near future, tap will satisfy all of
> > these requirements.
That will be really nice if it does.
-- Jamie
[Qemu-devel] Re: [PATCH-updated] qemu/net: add raw backend, Michael S. Tsirkin, 2009/10/14