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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter29 Configuring Multicast Routing
Customizing Multicast Routing
Step5 In the Source Netmask field, type or choose the network mask from the drop-down list for the source of
the register message.
Step6 In the Destination IP Address field, type the multicast destination address.
Step7 In the Destination Netmask field, type or choose the network mask from the drop-down list for the
multicast destination address.
Step8 Click OK.
Configuring PIM Message Intervals
Router query messages are used to select the PIM DR. The PIM DR is responsible for sending router
query messages. By default, router query messages are sent every 30 seconds. Additionally, every 60
seconds, the ASA sends PIM join or prune messages.
To change these intervals, perform the following steps:
Step1 In the main ASDM window, choose Configuration > Device Setup > Routing > Multicast > PIM >
Protocol.
Step2 Choose the interface that you want to enable for PIM from the table on the Protocol pane, and click Edit.
The Edit PIM Protocol dialog box appears.
Step3 In the Hello Interval field, type the frequency, in seconds, at which the interface sends PIM hello
messages.
Step4 In the Prune Interval field, type the frequency, in seconds, at which the interface sends PIM join and
prune advertisements.
Step5 Click OK.
Configuring a Route Tree
By default, PIM leaf routers join the shortest-path tree immediately after the first packet arrives from a
new source. This method reduces delay, but requires more memory than the shared tree. You can
configure whether or not the ASA should join the shortest-path tree or use the shared tree, either for all
multicast groups or only for specific multicast addresses.
To configure a PIM leaf router tree, perform the following steps:
Step1 In the main ASDM window, choose Configuration > Device Setup > Routing > Multicast > PIM >
Route Tree.
Step2 Click one of the following radio buttons:
Use Shortest Path Tree for All Groups—Choose this option to use the shortest-path tree for all
multicast groups.
Use Shared Tree for All Groups—Choose this option to use the shared tree for all multicast groups.
Use Shared Tree for the Groups specified below—Choose this option to use the shared tree for
the groups specified in the Multicast Groups table. The shortest-path tree is used for any group that
is not specified in the Multicast Groups table.