[ovs-discuss] Question about a vm connect to 2 bridges?

[changlimin]

Hi,

    I start a ovs-vswitchd, then create 2 bridges: br0 and br1.

    Then I start a vm, which has 2 vnics, the mac is 00:00:01:00:00:01, 00:00:02:00:00:01, connect to br0 and br1 respective.
    
    # kvm -name vm0 -m 384 -hda /images/1.img -vnc :0 \
     -net nic,macaddr=00:00:01:00:00:01 -net tap,script=/etc/ovs-ifup,downscript=/etc/ovs-ifdown \
     -net nic,macaddr=00:00:02:00:00:01 -net tap,script=/etc/ovs-ifup1,downscript=/etc/ovs-ifdown1 &

    # cat /etc/ovs-ifup
        switch='br0'
        /sbin/ifconfig $1 0.0.0.0 up
        ovs-vsctl add-port ${switch} $1 tag=10

    # cat /etc/ovs-ifup1
        #!/bin/sh
        switch='br1'
        /sbin/ifconfig $1 0.0.0.0 up
        ovs-vsctl add-port ${switch} $1 tag=11

    Then I find something strange:

    # ovs-appctl fdb/show br0
     port  VLAN  MAC                Age
        1    10  7a:e0:56:ae:1d:c9  529
        1    10  00:00:02:00:00:01  182        The nic connect br1, why appear at br0 ?
        1    10  00:00:01:00:00:01  182

    # ovs-appctl fdb/show br1
     port  VLAN  MAC                Age
        1    11  12:93:1d:8e:7d:74  536
        1    11  00:00:02:00:00:01  183
        1    11  00:00:01:00:00:01  183        The nic connect br0, why appear at br1 ?

    Does there is a implict cable connect br0 to br1 ?



    Best regards,

    Changlimin
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