From: Schulz, Dave (DSchulz@dpsciences.com)
Date: Wed Dec 07 2005 - 21:07:38 GMT-3
I'll second that, Bob. John - I am about half way through Beau's book, and it
is really good and helps "fill in all the gaps".
Dave
-----Original Message-----
From: nobody@groupstudy.com
To: John Matus; ccielab@groupstudy.com
Sent: 12/7/2005 5:50 PM
Subject: Re: multicast (s,g) vs (*,g) entries
Hi John,
Let me give it a shot:
(*,G) state shows information for the shared tree, the tree to the
rendezvous
point.
(S,G) state shows information for the shortest path tree.
Dense mode: (*,G) state is virtually meaningless. Dense Mode is all
about
(S,G) state.
Sparse Mode: (*,G) state is the shared tree info. (S,G) state is the
SPT
info.
SSM: only has (S,G) state
Bidirectional: Only has (*,G) state.
IMHO, the best descriptions are in Beau Williamson's "Developing IP
Multicast
Networks"
HTH,
Bob Sinclair
CCIE #10427, CCSI 30427
www.netmasterclass.net
----- Original Message -----
From: John Matus
To: ccielab@groupstudy.com
Sent: Wednesday, December 07, 2005 5:33 PM
Subject: multicast (s,g) vs (*,g) entries
i've read several books which have discussed the entries in the
multicast
routing tables - (S,G) and (*,G) entries. i understand that the S =
source
and G = group, but what i just have not been able to grasp (for
reasons
unbeknowst to me.........perhaps the drugs), the difference between
the two
and how they relate to sparse and dense mode. can someone explain
this in
simple terms so my delicate brain can understand the relevance? i
seem to
remember that they have different meanings in dense mode and sparse
mode.......
TIA
Regards,
John D. Matus
Technical Support / PAS
Fujitsu Consulting
626-568-7716
John.Matus@tokiom.com
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