29-4
Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter29 Configuring Multicast Routing
Customizing Multicast Routing
Table29-1 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, page29-4
•Configuring a Static Multicast Route, page29-5
•Configuring IGMP Features, page29-6
•Configuring PIM Features, page29-10
•Configuring a Multicast Group, page29-14
•Configuring a Bidirectional Neighbor Filter, page29-15
•Configuring a Multicast Boundary, page29-16

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, perform the following steps:
Step1 In the main ASDM window, choose Configuration > Device Setup > Routing > Multicast.
Step2 In the Multicast pane, check the Enable Multicast routing check box.
Step3 Click Apply to save your changes.
Step4 Choose Configuration > Device Setup > Routing > Multicast > IGMP > Protocol.
Step5 To modify the specific interface from which you want to forward IGMP messages, select the interface
and click Edit.
The Configure IGMP Parameters dialog box appears.
Step6 From the Forward Interface drop-down list, choose the specific interface from which you want to
forward IGMP messages.
Table29-1 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