Mbgp Overview; Mbgp Features Supported By The S6700; Configuring Basic Mbgp Functions; Establishing The Configuration Task - Huawei S6700 Series Configuration Manual

S6700 Series Ethernet Switches
Configuration Guide - IP Routing

9.1 MBGP Overview

MBGP is the multiprotocol extension of BGP.
When a multicast source and its receivers are distributed in different Autonomous Systems
(ASs), a forwarding tree needs to be set up across ASs. The Multiprotocol Border Gateway
Protocol (MP-BGP) specially transfers routes between ASs for multicast.
MP-BGP is the multiprotocol extension of the Border Gateway Protocol (BGP). At present,
BGP4 is applied only to unicast. MP-BGP, based on BGP4, supports multiple routing protocols,
including multicast.
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When MP-BGP is applied to multicast, it is called Multicast BGP (MBGP).

9.2 MBGP Features Supported by the S6700

You can configure such features as load splitting, route aggregation, route dampening,
community attributes, and route reflectors when configuring MBGP.
For details, refer to the chapter "BGP Configuration" in the S6700 Series Ethernet Switches
Configuration Guide - IP Routing.

9.3 Configuring Basic MBGP Functions

Before constructing an MBGP network, you need configure basic functions of MBGP.

9.3.1 Establishing the Configuration Task

Before configuring basic MBGP functions, familiarize yourself with the applicable environment,
pre-configuration tasks, and required data. This can help you complete the configuration task
quickly and accurately.
Applicable Environment
Perform the Reverse Path Forwarding (RPF) check on multicast packets according to the
following factors:
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MP-BGP maintains routes for unicast and multicast at the same time, stores them in
different routing tables, and keeps the routing information of unicast and multicast separate
from each other.
MP-BGP builds different network topologies for unicast and multicast at the same time.
Most of unicast routing policies and configuration methods supported by BGP4 can be
applied to multicast. MP-BGP maintains different routes for unicast and multicast
according to routing policies.
NOTE
This chapter describes the configuration of MP-BGP applied to multicast, that is, MBGP configuration.
For the details of MP-BGP, refer to the chapter "BGP Configuration" in the S6700 Series Ethernet Switches
Configuration Guide - IP Routing.
Static multicast route
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