R3303-HP HSR6800 Routers IP Multicast Configuration Guide

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Figure 44 Relationship among PIM protocols

PIM support for VPNs

To support PIM for VPNs, a multicast router that runs PIM maintains an independent set of PIM neighbor

table, multicast routing table, BSR information, and RP-set information for each VPN.

After receiving a multicast data packet, the multicast router checks which VPN the data packet belongs

to, and then forwards the packet according to the multicast routing table for that VPN or creates a

multicast routing entry for that VPN.

Protocols and standards

• RFC 3973, Protocol Independent Multicast-Dense Mode (PIM-DM): Protocol Specification(Revised)

• RFC 4601, Protocol Independent Multicast-Sparse Mode (PIM-SM): Protocol Specification (Revised)

• RFC 5015, Bidirectional Protocol Independent Multicast (BIDIR-PIM)

• RFC 5059, Bootstrap Router (BSR) Mechanism for Protocol Independent Multicast (PIM)

• RFC 4607, Source-Specific Multicast for IP

• Draft-ietf-ssm-overview-05, An Overview of Source-Specific Multicast (SSM)

Configuring PIM-DM

This section describes how to configure PIM-DM.

PIM-DM configuration task list

A receiver joins multicast group G.

G is in the

SSM group range?

BIDIR-PIM runs for G.

BIDIR-PIM is enabled?

G has a BIDIR-PIM RP?

Yes

PIM-SSM runs for G.

An IGMP-SSM mapping is

configured for G?

PIM-SM runs for G.

A multicast source is

specified?

Yes