By referring https://libvirt.org/migration.html.. I tried VM migration between two libvirt servers
I tried instance migration with ssh, tls and tcp. In all three I got the same error as " this function is not supported by the connection driver"
Eg
migrate --live domuname xen+tls://desthostname/system
error: this function is not supported by the connection driver: virDomainMigrate3
My question is Whether live migration is supported with Xen hypervisor???
At time of asking, libvirt did not support this particular migration mode for the Xen driver. Since libvirt 1.2.6 the libxl driver should not support migration in this manner.