priority and cost of the unicast route to the multicast source. The router to forward the
multicast packets of (S, G) is elected based on the following rules and in the order listed:
(1)
The router with the unicast route of the higher priority to the multicast source;
(2)
The router with the unicast route of the smaller cost to the multicast source;
(3)
The router with the local interface of the higher IP address.
11.3.1
PIM DM Interface
Choose the menu
Multicast Routing→PIM DM→PIM DM Interface
to load the following page.
Figure 11-13 PIM DM Interface
The following entries are displayed on this screen:
PIM DM Interface Config
The L3 interfaces can be configured as PIM DM mode by this page.
Select:
Select the desired PIM DM interface entry to modify.
Interface:
The interface for which data is to be displayed or configured.
You must have configured at least one router interface
before configuring or displaying data for a PIM DM interface.
Status:
Select enable or disable from the pull-down list to set the
administrative status of PIM DM for the selected interface.
The default is disable.
Hello Interval:
Specify the rate (time in seconds) at which PIM hello
messages are transmitted from the selected interface. The
valid value ranges from 1 to 18725 and the default is 30
seconds.
DR Priority:
Specify the DR priority for the selected interface. The valid
value range from 0 to 4294967294. The default value is 1.
IP Address:
The IP address of this interface.
Neighbor Count:
The neighbor numbers of this interface.
DR Address:
The designated router on the selected PIM interface.
11.3.2
PIM DM Neighbor
PIM DM neighbor is automatically learned by sending and receiving Hello Packets when PIM DM
is enabled.
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