From: Pierre-Alex (paguanel@hotmail.com)
Date: Sun May 07 2006 - 06:15:07 ART
Can someone please review the following statements I am making?
Some of them are not clearly stated in the RFCs or the Cisco Doc but appear to
be verified while labing.
Much thanks,
Pierre
======
1. The router with the lowest ip address is the IGMP querrier.
2. In PIM Dense mode to determine who will be the forwarder on a shared LAN,
pim asserts are used.
In PIM Spare mode to determine who will be the forwarder on a shared LAN,
a DR election is run :
The designated router is the router with the highest IP address or the router
configured with the highest "ip pim dr-priority" value
NB: in PIM Dense mode there is still an election but it serves no purpose
(except in IGMP v1 m to choose the IGMP Querier)
There is no need for an assert mechanism in SPARSE mode since there is already
a DR election.
(not exactly what the RFC is saying:
http://www.zvon.org/tmRFC/RFC2362/Output/chapter2.html !!!!
3. In sparse mode, the designated router (DR) sends SOURCE REGISTRATION
messages to the rendezvous point (RP).
The DR is also responsible for sending joins towards the RP.
The DR is the fowarder on a shared LAN.
========
This archive was generated by hypermail 2.1.4 : Thu Jun 01 2006 - 06:33:21 ART