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CHAPTER 1
Configuring IPv4 Multicast
IPv4 Multicast Overview
Copyright © 2010, Juniper Networks, Inc.
IPv4 multicast enables a device to send packets to a group of hosts rather than to a list
of individual hosts. This chapter describes how to configure IP multicast on the E Series
router; it contains the following sections:
IPv4 Multicast Overview on page 3
Platform Considerations on page 5
References on page 6
Before You Begin on page 6
Configuring the Switch Fabric Bandwidth on page 6
Enabling IP Multicast on page 6
Defining Static Routes for Reverse-Path Forwarding on page 7
Displaying Available Routes for Reverse-Path Forwarding on page 7
Enabling and Disabling RPF Checks on page 9
Using Unicast Routes for RPF on page 9
Defining Permanent IP Multicast Forwarding Entries on page 10
Defining a Multicast Bandwidth Map on page 10
Configuring Multicast QoS Adjustment on page 15
Activating Multicast QoS Adjustment Functions on page 17
Configuring Hardware Multicast Packet Replication on page 17
Blocking and Limiting Multicast Traffic on page 25
Deleting Multicast Forwarding Entries on page 29
Monitoring IP Multicast Settings on page 30
BGP Multicasting on page 39
Investigating Multicast Routes on page 40
IPv4 defines three types of addresses: unicast, broadcast, and multicast. Each type of
address enables a device to send datagrams to selected recipients:
A unicast address enables a device to send a datagram to a single recipient.
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