[libvirt-users] Migrate failed

[zhang xintao]

Dear All；
    I try to migrate a kvm guset os from Host A to Host B,but failed
       ================================================
       Host OS : Ubuntu 11.04 server
       Using libvirt 0.8.8
       Using API:QEMU 0.8.8
       Running hypervisor:QEMU 0.14.0
       ===============================================
       virsh migrate --live winxp quem+ssh://192.168.10.3/system
       root at 192.168.10.3's password:
       error:operation failed:migration to 'tcp:Host B:49156'
failed:migration failed
       ===============================================
       read libvirt.org FAQ,add --tunnelled FLAG
       ================================
       virsh migrate --live --tunnelled winxp qume+ssh://192.168.10.3/system
       root at 192.168.10.'s password:
        error: Requested operation is not vaild:cannot perform
tunnelled migration without using peer2peer flag
       ================================================
       add p2p flag
       ================================================
       virsh migrate --live --tunnelled winxp qume+ssh://192.168.10.3/system
       root at 192.168.10.'s password:
       error:operation failed:Failed to connect to remote libvirt URI
quem+ssh://192.168.10.3/system

      who can help me ?