Netgear Switch M4100 User Manual Page 435

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Chapter 28. PIM | 435
28
28. PIM
Protocol-Independent-Multicast
This chapter provides the following examples:
PIM-DM
PIM-SM on page 460
Note: The PIM protocol can be configured to operate on IPv4 and IPv6
networks. Separate CLI commands are provided for IPv4 and IPv6
operation; however, most configuration options are common to both
protocols. Therefore, this section describes only IPv4 configuration;
IPv6 configuration is similar to IPv4.
Multicast protocols are used to deliver multicast packets from one source to multiple receivers.
They facilitate better bandwidth utilization, and use less host and router processing, making
them ideal for usage in applications such as video and audio conferencing, whiteboard tools,
stock distribution tickers, and so on. PIM is a widely used multicast routing protocol. Protocol
Independent Multicast (PIM) is a standard multicast routing protocol that provides scalable
inter-domain multicast routing across the Internet, independent of the mechanisms provided by
any particular unicast routing protocol. There are two types of PIM:
PIM-Dense Mode (PIM-DM)
PIM-Sparse Mode (PIM-SM)
PIM-DM
PIM-DM is appropriate for:
Densely distributed receivers
A ratio of few senders to many receivers (due to frequent flooding)
High volume of multicast traffic
Constant stream of traffic
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