First of all, thank you for your advice.
I missed that the SSH connection is not closed after a live migration between two nodes.
(However, as i noted, Streaming connection is closed after (maybe) down-time of the live migartion.
Exactly my experimental environment is followed:
xen001: xxx.yyy.zzz.160
xen002: xxx.yyy.(zzz - 3).205
xen003: xxx.yyy.zzz.156
xenU: xxx.yyy.zzz.164 -> which runs ssh server, DarwinStreamingServer...
Client: xxx.yyy.(zzz - 3).207
and all machines except xen002 are connected by a same switch hub.
I tested a live migration several times, and I comfirmed that the live migaration between xen001 and xen002 always successes. Of course, the live migartion about xen001 and xen003 successes bidirectly, with a seamless session connection. (In here, session connection is tested with a SSH connection between a ssh client on xxx.yyy.(zzz-3).207 and a ssh server on xenU.
However, DarwinStreamingServer serving to a Quicktime player on a client are not serving anymore as stated above. Its avg delay is 0, not negative value. I think that ARP migration works well because of seamless session of SSH.
I don't know how I fix it. Please test it and reply its results.
Regards,
Kwang-Won