The difference between PIM version 1 and version 2

[mhiyoshi]

                   Hello in my understand, the difference between Multicast protocol PIM version 1 and 2 is as follows.

1. PIMv1 uses "224.0.0.2" for destination of PIM neighbor, prune, assert, Graft messages.

2. PIMv2 uses "224.0.0.13" for this purpose.

3.PIMv1 uses self interface as PIM-DR.

4.PIMv2 selects PIM-DR election.

However I do not recognize any other purposes to use PIMv2 which cisco recomends.

Any information is appreciated, thank you very much.

Masanobu Hiyoshi

[InayathUlla Sharieff]

Hi,

PIM Versions

PIMv2 includes these improvements over PIMv1:

•A single, active rendezvous point (RP) exists per multicast group, with multiple backup RPs. This single RP compares to multiple active RPs for the same group in PIMv1.

•A bootstrap router (BSR) provides a fault-tolerant, automated RP discovery and distribution mechanism that enables routers and multilayer switches to dynamically learn the group-to-RP mappings.

•Sparse mode and dense mode are properties of a group, as opposed to an interface. We strongly recommend sparse-dense mode, as opposed to either sparse mode or dense mode only.

•PIM join and prune messages have more flexible encoding for multiple address families.

•A more flexible hello packet format replaces the query packet to encode current and future capability options.

•Register messages to an RP specify whether they are sent by a border router or a designated router.

•PIM packets are no longer inside IGMP packets; they are standalone packets.

Regards

Inayath