August 2005
Intermediate to advanced
798 pages
31h 12m
English
ip pim — interface
ip pim {sparse-mode | dense-mode | sparse-dense-mode}
no ip pimIP multicast routing on the interface
Disabled
This command enables PIM (Protocol-Independent Multicast) and IGMP on the interface.
sparse-mode
In this mode, the router forwards multicast packets only if it has received a join message from a downstream router or if it has group members directly connected to this interface.
dense-mode
In this mode, the router forwards multicast packets until it can determine whether there are group members or downstream routers. Unlike sparse-mode, it doesn’t wait for a join message to begin sending multicast packets.
sparse-dense-mode
This mode allows the router to operate in both sparse-mode and dense-mode, depending on what the other routers in the multicast group are using.