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[Qemu-discuss] Redundant VDE network

From: Dmitry Antipov
Subject: [Qemu-discuss] Redundant VDE network
Date: Thu, 04 Dec 2014 20:38:34 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0

I'm using QEMU 2.1.1 to emulate SPARC system and have vde network between two
VMs and host system, organized as shown:

        + +
        |                 |
        |                 |
        vm0               vm1
        eth0              eth0 ---

On host, I'm running vde_switch and extra stuff as:

vde_switch -tap tap0 -daemon -mod 660 -group [group]
ip addr add dev tap0
ip link set tap0 up
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -s -o [external network iface] 

VMs are running with:

qemu-system-sparc -m 256 -net nic -net vde -hda vm0.img
qemu-system-sparc -m 256 -net nic -net vde -hda vm1.img

Everything looks good, but...

...the problem: I need to build redundant network by using the same method, i.e.
improve the network shown above with:

        + +
        |                 |
        |                 |
        vm0               vm1
        eth1              eth1 ---

I'm trying to run two vde switches:

vde_switch -sock /tmp/vde0 -tap tap0 -daemon -mod 660 -group [group]
vde_switch -sock /tmp/vde1 -tap tap1 -daemon -mod 660 -group [group]

and run VMs with:

qemu-system-sparc -m 256 -net nic,vlan=1 -net vde,sock=/tmp/vde0,vlan=1 -net 
nic,vlan=2 -net vde,sock=/tmp/vde1,vlan=2 -hda vm0.img

but the result is:

Warning: hub port hub2port0 has no peer
Warning: vlan 2 with no nics
Warning: netdev hub2port0 has no peer
Warning: requested NIC (anonymous, model unspecified) was not created (not 
supported by this machine?)

Is it possible to build redundant network as described above? What I'm doing 

Thanks in advance,

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