Configuring Multicast
IP multicast is a method of forwarding the same set of IP packets to a number of hosts within a network. You can use multicast in IPv4 networks to provide efficient delivery of data to multiple destinations.
Multicast involves both a method of delivery and discovery of senders and receivers of multicast data, which is transmitted on IP multicast addresses called groups. A multicast address that includes a group and source IP address is often referred to as a channel. The Internet Assigned Number Authority (IANA) has assigned 224.0.0.0 through 239.255.255.255 as IPv4 multicast addresses. For more information, see [http://www.iana.org/assignments/multicast-addresses] (http://www.iana.org/assignments/multicast-addresses).
Note: For a complete list of RFCs related to multicast, see Appendix A, IETF RFCs for IP Multicast.
The routers in the network listen for receivers to advertise their interest in receiving multicast data from selected groups. The routers then replicate and forward the data from sources to the interested receivers. Multicast data for a group is transmitted only to those LAN segments with receivers that requested it.
This section contains payload examples and CLIs to demonstrate how to use the NX-API REST API to configure multicast on Cisco Nexus 3000 and 9000 Series switches and to show how the REST APIs correspond to the CLI commands.
For more information about configuring multicast, see the Cisco Nexus 9000 Series NX-OS Multicast Routing Configuration Guide, Release 7.x.