HP 6400cl, Management Manual, Page: 134 / 664

PIM-DM (Dense Mode) on the 5300xl Switches
PIM-DM Operation
5308XL #1
5304XL #2
HP ProCurve
5304XL #3
5304XL #4
Other
Multicast
Router
Other
Multicast
Router
Indicates Paths Requiring
Periodic Flood-Prune Cycles
for a Given Multicast Group
These multicast routers do
not have the state refresh
feature and thus require
periodic flood-prune
cycles to advertise active
multicast group. In this
case it may be better to
group these routers on the
same multicast tree to
avoid the additional flood/
prune cycles on the routers
that do support state
refresh.
These HP 5300XL multicast routers
support the state refresh feature but
must handle periodic flood-prune
cycles for the downstream routers
that lack this feature.
These HP 5300XL multicast routers
support the state refresh feature
and do not require periodic flood-
prune cycles for a given multicast
group, which frees up bandwidth
for other uses.
Video
Server
Video
Server
Video
Server
Figure 5-2. Example of Bandwidth Conservation in 5300XL Routing Switches with PIM-DM State Refresh
5-8