Cisco ASR 9000 Series Software Manual

Multicast Routing Implementation
Cisco IOS XR Software supports the following protocols to implement multicast routing:
•
IGMP is used between hosts on a LAN and the routers on that LAN to track the multicast groups of
which hosts are members.
•
Protocol Independent Multicast in sparse mode (PIM-SM) is used between routers so that they can track
which multicast packets to forward to each other and to their directly connected LANs.
•
Protocol Independent Multicast in Source-Specific Multicast (PIM-SSM) is similar to PIM-SM with the
additional ability to report interest in receiving packets from specific source addresses (or from all but
the specific source addresses), to an IP multicast address.
•
PIM-SSM is made possible by IGMPv3 and MLDv2. Hosts can now indicate interest in specific sources
using IGMPv3 and MLDv2. SSM does not require a rendezvous point (RP) to operate.
•
PIM Bidirectional is a variant of the Protocol Independent Multicast suit of routing protocols for IP
multicast. PIM-BIDIR is designed to be used for many-to-many applications within individual PIM
domains.
This image shows IGMP and PIM-SM operating in a multicast environment.
Figure 1: Multicast Routing Protocols
Cisco ASR 9000 Series Aggregation Services Router Multicast Configuration Guide, Release 5.1.x
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Implementing Layer-3 Multicast Routing on Cisco IOS XR Software
Multicast Routing Functional Overview

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model