From: Laurent Vivier <Laurent.Vivier@bull.net>
To: qemu-devel@nongnu.org
Cc: Volkan YAZICI <yazicivo@ttmail.com>
Subject: Re: [Qemu-devel] Multiple Qemu Instances
Date: Mon, 20 Oct 2008 14:46:42 +0200 [thread overview]
Message-ID: <1224506802.4096.9.camel@frecb07144> (raw)
In-Reply-To: <87od1fe94s.fsf@alamut.mobiliz.com.tr>
Hi,
you must provide different mac addresses for each qemu instance with
"-net nic,macaddr=.... "
Laurent
Le lundi 20 octobre 2008 à 15:36 +0300, Volkan YAZICI a écrit :
> Hi,
>
> While trying to run two qemu instances on a single server with a single
> NIC, I'm having network related problems. When I start the second qemu
> instance, ping'ing both servers concurrently works like below:
>
> ping 192.168.1.11 ping 192.168.1.14
> ------------------------------- -------------------------------
> 10 packets transmitted. Waking up...
> Packets get started to lost. 10 packets transmitted. (No loss.)
> 10 packets transmitted. (No loss.) Packets get started to lost.
> Packets get started to lost. 10 packets transmitted. (No loss.)
> 10 packets transmitted. (No loss.) Packets get started to lost.
> Packets get started to lost. 10 packets transmitted. (No loss.)
> 10 packets transmitted. (No loss.) Packets get started to lost.
> ... ...
>
> Related configurations are listed below.
>
> $ ifconfig -a
> br0 Link encap:Ethernet HWaddr 00:1A:64:C1:94:3C
> inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
> inet6 addr: fe80::21a:64ff:fec1:943c/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:57580386 errors:0 dropped:0 overruns:0 frame:0
> TX packets:50256481 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:7292961440 (6.7 GiB) TX bytes:28958593591 (26.9 GiB)
>
> eth0 Link encap:Ethernet HWaddr 00:1A:64:C1:94:3C
> inet6 addr: fe80::21a:64ff:fec1:943c/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:545421613 errors:0 dropped:0 overruns:0 frame:0
> TX packets:508159417 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:518992547535 (483.3 GiB) TX bytes:386017012654 (359.5 GiB)
> Interrupt:106 Memory:ce000000-ce011100
>
> tap0 Link encap:Ethernet HWaddr 82:CE:FE:4D:9F:24
> inet6 addr: fe80::80ce:feff:fe4d:9f24/64 Scope:Link
> UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
> RX packets:74724106 errors:0 dropped:0 overruns:0 frame:0
> TX packets:112203767 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:500
> RX bytes:8410033346 (7.8 GiB) TX bytes:151553233037 (141.1 GiB)
>
> tap1 Link encap:Ethernet HWaddr A6:29:D5:36:3D:2E
> inet6 addr: fe80::a429:d5ff:fe36:3d2e/64 Scope:Link
> UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
> RX packets:139 errors:0 dropped:0 overruns:0 frame:0
> TX packets:388 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:500
> RX bytes:66530 (64.9 KiB) TX bytes:123439 (120.5 KiB)
>
> $ cat /etc/qemu-ifup
> #!/bin/sh
>
> IFACE=$1
>
> /sbin/ifconfig $IFACE 0.0.0.0 promisc up
> /usr/sbin/brctl addif br0 $IFACE
>
> $ cat /etc/qemu-ifdown
> #!/bin/sh
>
> IFACE=$1
>
> /sbin/ifconfig $IFACE 0.0.0.0 promisc down
> /usr/sbin/brctl delif br0 $IFACE
>
> I start qemu using a command similar to below
>
> /usr/local/bin/qemu-system-x86_64 ... -net nic -net tap
>
> Does anybody have an idea about what might be causing the problem? How
> can I deploy two qemu instances sharing physically same NICs?
>
>
> Regards.
>
>
>
--
------------------ Laurent.Vivier@bull.net ------------------
"Tout ce qui est impossible reste à accomplir" Jules Verne
"Things are only impossible until they're not" Jean-Luc Picard
prev parent reply other threads:[~2008-10-20 12:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-20 12:36 [Qemu-devel] Multiple Qemu Instances Volkan YAZICI
2008-10-20 12:44 ` Paul Brook
2008-10-20 12:46 ` Laurent Vivier [this message]
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