PIM Version 2
Cisco routers with recent versions of the IOS use PIM Version 2 by default.
Some differences between PIM Version 1 and PIM Version 2 include:
�¡ PIM Version 1 is Cisco proprietary, whereas PIM Version 2 is standards-
based.
�¡ Both versions can dynamically map RPs to multicast groups. PIM
Version 1 uses an auto-RP mapping agent, and PIM Version 2 uses a
bootstrap router (BSR).
�¡ PIM Version 1 uses a Time-to-Live value to bound its announcements,
and PIM Version 2 uses a configured domain border.
�¡ In PIM Version 2, sparse and dense mode are group properties, not
interface properties.
To configure PIM Version 2, configure at least one router as a BSR, and
selected routers as RPs. To configure a BSR, use the following:
(config)# ip pim bsr-candidate interface hash-mask-length [priority]
To configure a router as a candidate RP, use the following:
(config)# ip pim rp-candidate type number ttl group-list accesslist-
number