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Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring Multicast Routing
Customizing Multicast Routing
Table 1-1 lists the maximum number of entries for specific multicast tables based on the amount of RAM
on the ASA. Once these limits are reached, any new entries are discarded.
Customizing Multicast Routing
This section describes how to customize multicast routing and includes the following topics:
• Configuring Stub Multicast Routing and Forwarding IGMP Messages, page 1-4
• Configuring a Static Multicast Route, page 1-5
• Configuring IGMP Features, page 1-5
• Configuring PIM Features, page 1-10
• Configuring a Bidirectional Neighbor Filter, page 1-13
• Configuring a Multicast Boundary, page 1-14
Configuring Stub Multicast Routing and Forwarding IGMP Messages
Note Stub multicast routing and PIM are not supported concurrently.
An ASA acting as the gateway to the stub area does not need to participate in PIM. Instead, you can
configure it to act as an IGMP proxy agent and forward IGMP messages from hosts connected on one
interface to an upstream multicast router on another interface. To configure the ASA as an IGMP proxy
agent, forward the host join and leave messages from the stub area interface to an upstream interface.
To forward the host join and leave messages, enter the following command from the interface attached
to the stub area:
Command Purpose
multicast-routing
Example:
hostname(config)# multicast-routing
Enables multicast routing.
The number of entries in the multicast routing tables are limited by the
amount of RAM on the ASA.
Table 1-1 Entry Limits for Multicast Tables
Table
16
MB
128
MB
128+
MB
MFIB 1000 3000 5000
IGMP
Groups
1000 3000 5000
PIM Routes 3000 7000 12000
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