On Mon, 2011-07-18 at 10:59 +0100, Gavin McCullagh wrote:
>> I'm looking to set up a KVM with bridge mode networking so that the VM is
> not NATted and is directly available on the local network alongside the
> host OS, eg host OS at 10.1.10.2/24 (on eth0) and VM at 10.1.10.3/24 (on
> its eth0, bridged onto the host eth0), both available from a remote host on
> the same subnet or on another subnet via a router.
>> I'm a bit new to bridge setup and the examples I've found all seem to miss
> out key details -- they just tell you arbitrary things to type but without
> explaining the background so I can tailor it.
Dunno whether you've seen e.g.
There's some nice tips in there like to watch out for the fact that
iptables FORWARD chain applies to packets forwarded across the bridge
> I presume if I set br0 on the host OS to 10.1.10.3/24 I will encounter
> routing issues. I guess I could use eg /31 or /32 netmasks which
> would avoid that.
>> Does one set IP addresses on the host OS bridge interface? Do you use the
> same addresses or different to the VM interface? What is the usual way of
> doing this?
Assuming eth0 on the host is currently assigned 10.1.10.2/24, what you
want to do is enslave eth0 to br0 and assign 10.1.10.2/24 to the br0
If you're using DHCP, then the bridge interface will use the MAC of the
enslaved eth0 and it will automatically be assigned 10.1.10.2/24
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