Containers can be migrated via command line (windows)

Syntax

Simple format

vzmigrate -f container_ID -A Destinationserver_IP -U administrator -P password

More functions

vzmigrate -f 175 -A {DestinationHNaddress} -U {Destination Node Administrative Username} -P {Password for account with rights on Destination Node} -r yes

The -r yes at the end of the command removes the container from the source node after successful migration, it is optional.

Example
vzmigrate -f 100 -A 11.11.11.12 -U administrator -P password

For more information refer

http://forum.parallels.com/pda/index.php/t-89784.html