From: Bob Sinclair (bob@bobsinclair.net)
Date: Mon Feb 27 2006 - 13:43:10 GMT-3
Bidirectional PIM Differs from Sparse mode in at least these ways:
Bidir does not maintain any (S,G) state. Only (*,G) state. This is what
makes it scalable for many-to-may multicast.
Bidir does not do PIM registration. First-hop routers do not register traffic
with the RP. First hop routers, forward traffic for active groups toward the
RP, whether anyone wants the traffic or not, as long as the group is active.
Since there is no PIM registration, the RP does not actually have to be a
reachable address, only a reachable network that acts as a root.
Here is a link with more info:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configuration
_guide_chapter09186a00800ca796.html
HTH,
Bob Sinclair
CCIE #10427, CCSI 30427
www.netmasterclass.net
----- Original Message -----
From: CCIEin2006
To: ccielab@groupstudy.com
Sent: Monday, February 27, 2006 11:28 AM
Subject: Difference between Bidirectional PIM and PIM Sparse Mode
Hello group,
I am not very clear on the differences between Bidirectional PIM and PIM
Sparse Mode. Both use the RP and switchover to shortest path tree after the
first packet is received, correct?
How do they differ exactly?
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