Configuring Multicast Routing; Multicast Routing Overview - Cisco FirePOWER ASA 5500 series Configuration Manual

Configuring Multicast Routing

This chapter describes how to configure multicast routing. This section includes the following topics:
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Multicast Routing Overview

The security appliance supports both stub multicast routing and PIM multicast routing. However, you
cannot configure both concurrently on a single security appliance.
Stub multicast routing provides dynamic host registration and facilitates multicast routing. When
configured for stub multicast routing, the security appliance acts as an IGMP proxy agent. Instead of
fully participating in multicast routing, the security appliance forwards IGMP messages to an upstream
multicast router, which sets up delivery of the multicast data. When configured for stub multicast
routing, the security appliance cannot be configured for PIM.
The security appliance supports both PIM-SM and bi-directional PIM. PIM-SM is a multicast routing
protocol that uses the underlying unicast routing information base or a separate multicast-capable
routing information base. It builds unidirectional shared trees rooted at a single Rendezvous Point per
multicast group and optionally creates shortest-path trees per multicast source.
Bi-directional PIM is a variant of PIM-SM that builds bi-directional shared trees connecting multicast
sources and receivers. Bi-directional trees are built using a DF election process operating on each link
of the multicast topology. With the assistance of the DF, multicast data is forwarded from sources to the
Rendezvous Point, and therefore along the shared tree to receivers, without requiring source-specific
state. The DF election takes place during Rendezvous Point discovery and provides a default route to the
Rendezvous Point.
If the security appliance is the PIM RP, use the untranslated outside address of the security appliance as
Note
the RP address.
OL-10088-01
Multicast Routing Overview, page 11-13
Enabling Multicast Routing, page 11-14
Configuring IGMP Features, page 11-14
Configuring Stub Multicast Routing, page 11-17
Configuring a Static Multicast Route, page 11-17
Configuring PIM Features, page 11-18
For More Information about Multicast Routing, page 11-21
C H A P T E R
Cisco Security Appliance Command Line Configuration Guide
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11-13