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IP_MULTICAST_IF z/OS Communications Server: IP Sockets Application Programming Interface Guide and Reference SC27-3660-00 |
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In order to control which interface multicast datagrams will be sent on, the API provides the IP_MULTICAST_IF socket option. This option can be used to set the interface for sending outbound multicast datagrams from the sockets application. Multicast datagrams can be transmitted on only one interface at a time. You can determine the interface being used by the way of the GETSOCKOPT API with IP_MULTICAST_IF as the OPTNAME. Figure 1 illustrates the use of IP_MULTICAST_IF by the use of the SETSOCKOPT and GETSOCKOPT APIs. Figure 1. IP_MULTICAST_IF
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