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When attempting to perform the migration of a Xen domainU guest from one host to another the migration command files fails as follows:
The most likely cause of this problem is that the firewall on the destination host (i.e . the server to which the guest domain is to be migrated) has not been configured to allow traffic on the port used by Xen to perform domain relocations.
By default Xen performs guest migrations using port 8002. It is possible, however, to configure another port for this service by changing the value assigned to the ''xend-relocation-port'' setting in the ''/etc/xen/xend-config.sxp'' configuration file. If this setting is commented out as shown below then the system will default to 8002: