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Implementing Multicast Routing on Cisco IOS XR
Software
Multicast routing is a bandwidth-conserving technology that reduces traffic by simultaneously delivering
a single stream of information to potentially thousands of corporate recipients and homes. Applications that
take advantage of multicast routing include video conferencing, corporate communications, distance learning,
and distribution of software, stock quotes, and news.
This document assumes that you are familiar with IPv4 and IPv6 multicast routing configuration tasks and
concepts for Cisco IOS XR Software .
Multicast routing allows a host to send packets to a subset of all hosts as a group transmission rather than to
a single host, as in unicast transmission, or to all hosts, as in broadcast transmission. The subset of hosts is
known as group members and are identified by a single multicast group address that falls under the IP Class
D address range from 224.0.0.0 through 239.255.255.255.
For detailed conceptual information about multicast routing and complete descriptions of the multicast routing
commands listed in this module, you can refer to the
Feature History for Configuring Multicast Routing on the Cisco CRS Routers
Release
Release 2.0
Release 3.2
Release 3.5.0
Release 3.7.0
C H A P T E R
Related Documents, on page
Modification
This feature was introduced.
Support was added for the for IPv6 routing protocol and for the
bootstrap router (BSR) feature.
Multicast VPNv4 was supported.
The following new features or functionality were added:
• Support was added for multitopology routing within a
default VRF table.
• A new configuration procedure was added for calculating
rate per route.
Cisco IOS XR Multicast Configuration Guide for the Cisco CRS Router, Release 5.2.x
2
190.
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