Multicast and Routing Guide K/KA/KB.15.15

3 PIM-SM (Sparse Mode)
For introductory information, see “PIM-SM overview” (page 92).
Configuring router protocol independent multicast (PIM)
For more information, see “Configuration steps for PIM-SM” (page 101).
The following steps configure PIM-SM in the router PIM context (HP Switch(pim)#_):
1. Specify the VLAN interface to advertise as the Bootstrap Router (BSR) candidate and enable
the router to advertise itself as a candidate BSR in a PIM-SM domain. (Use the command
bsr-candidate source-ip-vlan [vid].)
2. Optional: To make BSR candidate selection occur quickly and predictably, set a different
priority on each BSR candidate in the domain. (Use the command bsr-candidate
priority.)
3. Do one of the following to configure RP operation:
• Recommended: Enable Candidate Rendezvous Point (C-RP) operation and configure the
router to advertise itself as a C-RP to the BSR for the current domain. This step includes
the option to allow the C-RP to be a candidate for either all possible multicast groups or
for up to four multicast groups and/or ranges of groups. Use the command
rp-candidate source-ip-vlan [vid] [group-addr/group-mask.]
• Optional: Use the command
rp-address [ip-addr] [group-addr/group-mask]
to statically configure the router as the RP for a specified multicast group or range of
multicast groups. (This must be configured on all PIM-SM routers in the domain.)
4. Optional: In the PIM router context, change one or more of the traffic control settings in the
following table.
OperationOptions accessed in router PIM context
Enter an address and mask to define an additional
multicast group or a range of groups.
rp-candidate group-prefix
[group-addr/group-mask]
Tells the BSR how long it should expect the sending C-RP
router to be operative. Default: 150; 0 if router is not a
candidate
rp-candidate hold-time [30-255]
Changes the priority for the C-RP router. When multiple
C-RPs are configured for the same multicast groups, the
priority determines which router becomes the RP for such
groups. A smaller value means a higher priority. Default:
192
rp-candidate priority [0-255]
Disable or enable the router's ability to switch multicast
traffic flows to the shortest path tree. Default: enabled
[no] spt-threshold
(page 76)
Option: Globally change the interval for the frequency
at which join and prune messages are forwarded on
the router's VLAN interfaces. Default: 60 seconds
join-prune-interval [5-65535]
(page 68)
Option: Enable or disable PIM traps. Default: disabledtrap [ neighbor-loss | hardware-mrt-full
| software-mrt-full | all ]
Configuring router protocol independent multicast (PIM) 65