Cisco ASA 5505 Configuration Manual page 454

Customizing Multicast Routing
Customizing Multicast Routing
This section describes how to customize multicast routing and includes the following topics:
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Configuring Stub Multicast Routing
Note Stub multicast routing and PIM are not supported concurrently.
An adaptive security appliance 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. To configure the adaptive security
appliance 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:
In the main ASDM window, choose Configuration > Device Setup > Routing > Multicast > IGMP.
Step 1
Step 2 In the Multicast pane, check the Enable Multicast routing check box.
Step 3 Choose MForwarding.
Step 4 Double-click the specific interface that you want to forward.
This interface is now enabled to be forwarded. Double-click on the enabled interface to disable a specific
interface from being forwarded.
Configuring a Static Multicast Route
Configuring static multicast routes lets you separate multicast traffic from unicast traffic. For example,
when a path between a source and destination does not support multicast routing, the solution is to
configure two multicast devices with a GRE tunnel between them and to send the multicast packets over
the tunnel.
When using PIM, the adaptive security appliance expects to receive packets on the same interface where
it sends unicast packets back to the source. In some cases, such as bypassing a route that does not support
multicast routing, you may want unicast packets to take one path and multicast packets to take another.
Static multicast routes are not advertised or redistributed.
Cisco ASA 5500 Series Configuration Guide using ASDM
24-4
Configuring Stub Multicast Routing, page 24-4
Configuring a Static Multicast Route, page 24-4
Configuring IGMP Features, page 24-5
Configuring PIM Features, page 24-10
Configuring a Multicast Group, page 24-14
Configuring a Bidirectional Neighbor Filter, page 24-15
Configuring a Multicast Boundary, page 24-16
Chapter 24 Configuring Multicast Routing
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