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Re: [Qemu-devel] problems: running two instance of Qemu with same MAC ad
From: |
Rutger Nijlunsing |
Subject: |
Re: [Qemu-devel] problems: running two instance of Qemu with same MAC address |
Date: |
Wed, 19 May 2004 11:31:55 +0200 |
User-agent: |
Mutt/1.5.6i |
On Wed, May 19, 2004 at 03:32:44PM +0700, Mulyadi Santosa wrote:
> hello all
>
> I have problem about identical MAC address...here is the scenario
>
> I run two instances of Qemu for full system emulation. I use Qemu 0.5.5
> On both guest system, i can turn on the eth0 (NE 2000 card) . here is the
> dmesg content:
>
> On guest 1 and 2:
> NE*000 ethercard probe at 0x300: 52 54 00 12 34 56
>
> Guest 1 IP on eth0 --> 192.168.1.21..attached to tun0 with IP -->192.168.1.11
> Guest 2 IP on eth0 --> 192.168.1.22..attached to tun0 with IP --> 192.168.1.12
>
> here is the routing table at the host system:
> Kernel IP routing table
> Destination Gateway Genmask Flags MSS Window irtt Iface
> 192.168.1.21 * 255.255.255.255 UH 0 0 0 tun0
> 192.168.1.22 * 255.255.255.255 UH 0 0 0 tun1
> 10.1.1.0 * 255.255.255.0 U 0 0 0 eth0
> 127.0.0.0 * 255.0.0.0 U 0 0 0 lo
>
> Both guests can ping the host and the host can ping to these guests. When I
> try to ping from guest 1 to guest 2, it got no reply (i guess similar with
> dropped packet when u do DROP with iptables)
>
> I realize the fact that both eth0 on the guests when I do tcpdump-ing. Ping
> from guest 1 yield arp broadcast, but never get arp-reply...So, what is the
> workaround for this double MAC address problem?
You've got forwarding or bridging enabled in the host?
--
Rutger Nijlunsing ---------------------------- rutger ed tux tmfweb nl
never attribute to a conspiracy which can be explained by incompetence
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