Specify the following two port numbers for receiving jobs distributed by multicast distribution:

• Multicast distribution (default: 22296)
• Request a re-send (default: 22294)

Normally, you should use the displayed default port numbers. However, you must change a port number if some other program is using that port. It is important that you set a port number for Request a re-send, because multicast distribution uses the UDP protocol and packets may be resent during distribution.

If a port number is set in the services file of TCP/IP, the services file setting takes precedence.

Select the Allow jobs to be received by multicast distribution check box to receive jobs specified for multicast distribution from the higher system using the multicast distribution method. The default is that this check box is not selected. To receive jobs by multicast distribution, select this check box, and then specify the same multicast address specified in the connection destination higher system.

When Allow jobs to be received by multicast distribution check box is not selected, jobs are received by unicast distribution even if multicast distribution is specified. Conversely, even if you select this check box, jobs for which you have specified unicast distribution are received using the unicast method.

You should clear the Allow jobs to be received by multicast distribution check box if there is a router in the network that is not compatible with IP multicasting. If the network includes routers that are not compatible with IP multicasting, unicast distribution is used; you cannot use multicast distribution. If you do select Allow jobs to be received by multicast distribution check box, the system will require a long time to switch to unicast distribution in order to distribute a job.

Multicast address

Specify the same multicast address specified in the connection destination higher system. This completes registration into a multicast group to which the higher system sends jobs. Specify a value in the range from 224.0.1.0 to 239.255.255.255. The default address is 239.255.0.1.

If the multicast address of the connection-destination higher system does not match the multicast address you specify here, the job will be distributed using unicast distribution to this client. For details about multicast groups and multicast addresses, see 6.2 Settings for multicast distribution in the Description and Planning Guide.