Install guide

IP Multicasting 13
Configuring PIM Sparse Mode
PIM multicasting routing is disabled by default and must be enabled on the
switch before PIM configuration takes effect. However, we recommend that the
PIM configuration be completely set up on the switch before PIM is enabled. To
enable or disable PIM, use the commands:
enable pim
disable pim
For PIM Sparse Mode multicast routing to operate on the switch, each interface
over which it is to send and receive multicast routing messages and multicast
packets must be assigned to PIM-SM. Each subnetwork must also have at least
one designated router candidate, each network must have at least one
bootstrap router candidate, and each multicast group must have at least one
rendezvous point candidate.
The IP configuration of an interface cannot be changed while PIM is attached to
the interface. The PIM interface must first be deleted, and then added again
after the IP changes have been made.
PIM-SM interfaces By default PIM interfaces are set to use Sparse Mode when they are added. To
add a PIM-SM interface, use the command:
add pim interface=interface [drpriority=0..4294967295]
[electby={drpriority|ipaddress}] [mode=sparse]
[other-options...]
Each PIM-SM interface has a priority for becoming the designated router (DR)
for its subnetwork. The higher the number, the higher the priority. The default
designated router priority is 1. If the multicast group must choose a DR from
interfaces with the same priority, or no priority, the interface with the highest
IP address number is chosen.
The electby parameter determines how the switch elects the designated router
for this interface. If drpriority is specified, the interface transmits its DR
priority in its hello messages. If all routers in the subnetwork transmit their DR
priorities, routers in the subnetwork can elect the DR by priority. If ipaddress is
specified, the switch does not transmit its DR priority, which forces the routers
in the subnetwork to elect the DR by IP address. The default is drpriority.
To delete an interface, use the command:
delete pim interface=interface
To modify the mode, designated router priority, or method by which the
designated router is elected for a PIM interface, use the command:
set pim interface=interface mode={dense|sparse}
[drpriority=0..4294967295] [electby={drpriority|
ipaddress}] [other-options...]
To restart all PIM processes on an interface, resetting the PIM timers, route
information and counters for the interface, use the command:
reset pim interface=interface
To display information about PIM interfaces, use the command:
show pim interface