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Configuration Guide - IP Multicast

S7700 and S9700 V200R010C00

This document describes IP multicast basics and how to configure IP multicast features, including IGMP/MLD, PIM (IPv4&IPv6), MSDP, multicast VPN, Layer 3 multicast CAC, Layer 2 multicast CAC, IGMP/MLD snooping, and multicast VLAN, IPv4&IPv6 multicast route management, static multicast MAC address, multicast network.
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Overview

Overview

Definition

Multicast route management refers to the control of multicast packet forwarding by creating or changing multicast routes, as well as checking and maintaining multicast forwarding paths.

Purpose

Multicast route management ensures that multicast packets are forwarded efficiently through the correct paths.

In multicast routing and forwarding, each multicast routing protocol creates and maintains its own routing table. The routing information from these tables is then used to create a general multicast routing table. Multicast routers use this general multicast routing table to determine optimal routes, according to multicast routing and forwarding policies. The optimal route information is then delivered to the multicast forwarding information base (MFIB), where multicast data forwarding is controlled.

The MFIBs of network devices maintain a point-to-multipoint forwarding tree for the entire network, with a multicast source as the root and group members as leaves. Table 10-1 describes functions of multicast route management.

Table 10-1  Multicast route management functions
Function Description

Reverse Path Forwarding (RPF) check

Ensures that multicast data is forwarded through correct paths.

Multicast load splitting

Distributes multicast data to multiple equal-cost routes to reduce the load on individual paths.

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Updated: 2019-08-21

Document ID: EDOC1000141903

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