* [Qemu-devel] Multiple Qemu Instances
@ 2008-10-20 12:36 Volkan YAZICI
2008-10-20 12:44 ` Paul Brook
2008-10-20 12:46 ` Laurent Vivier
0 siblings, 2 replies; 3+ messages in thread
From: Volkan YAZICI @ 2008-10-20 12:36 UTC (permalink / raw)
To: qemu-devel
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.
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [Qemu-devel] Multiple Qemu Instances
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
1 sibling, 0 replies; 3+ messages in thread
From: Paul Brook @ 2008-10-20 12:44 UTC (permalink / raw)
To: qemu-devel; +Cc: Volkan YAZICI
On Monday 20 October 2008, Volkan YAZICI wrote:
> 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.
>...
> I start qemu using a command similar to below
>
> /usr/local/bin/qemu-system-x86_64 ... -net nic -net tap
You need to give the emulated NICs different MAC addresses.
Paul
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] Multiple Qemu Instances
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
1 sibling, 0 replies; 3+ messages in thread
From: Laurent Vivier @ 2008-10-20 12:46 UTC (permalink / raw)
To: qemu-devel; +Cc: Volkan YAZICI
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
^ permalink raw reply [flat|nested] 3+ messages in thread
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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
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