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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter29 Configuring Multicast Routing
Guidelines and Limitations
Guidelines and Limitations
This section includes the guidelines and limitations for this feature.
Context Mode Guidelines
Supported in single context mode. In multiple context mode, unshared interfaces and shared interfaces
are not supported.
Firewall Mode Guidelines
Supported only in routed firewall mode. Transparent firewall mode is not supported.
IPv6 Guidelines
Does not support IPv6.
Enabling Multicast Routing
Enabling multicast routing lets you enable multicast routing on the ASA. Enabling multicast routing
enables IGMP and PIM on all interfaces by default. IGMP is used to learn whether members of a group
are present on directly attached subnets. Hosts join multicast groups by sending IGMP report messages.
PIM is used to maintain forwarding tables to forward multicast datagrams.
Note Only the UDP transport layer is supported for multicast routing.
To enable multicast routing, 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.
Checking this check box enables IP multicast routing on the ASA. Unchecking this check box disables
IP multicast routing. By default, multicast is disabled. Enabling multicast routing enables multicast on
all interfaces. You can disable multicast on a per-interface basis.
Model License Requirement
All models Base License.