This blog was originally started to better help me understand the technologies in the CCIE R&S blueprint; after completing the R&S track I have decided to transition the blog into a technology blog.

CCIE #29033

This blog will continue to include questions, troubleshooting scenarios, and references to existing and new technologies but will grow to include a variety of different platforms and technologies. Currently I have created over 185 questions/answers in regards to the CCIE R&S track!! Note: answers are in the comment field or within "Read More" section.

You can also follow me on twitter @FE80CC1E


Tuesday, April 20, 2010

Question 4

What are the differences between Dense and Sparse Modes?
Posted by Packets Analyzed at 6:15 AM
Labels: ,

1 comments:

Packets Analyzed said...

PIM - Protocol Independent Multicast

PIM Sparse Mode - Creates a path from a data source to a receiver requesting data. RPF (reverse path forwarding) checks to ensure that the source IP address received on that interface has an entry in the routing table. Sparse mode uses RP (rendezvous points) and creates a SPT (Shortest Path Tree) to the multicast group. The RP receives a join request(*,G) * = any source, G = multicast group. Data is only sent to routers making an explicit request

PIM Dense Mode - No RP, data is sent to all participating PIM routers and pruned if the multicast data is not required. This happens every 3 minutes.(S,G) S = Source, G = multicast group

April 21, 2010 at 5:17 PM

Post a Comment

Subscribe to: Post Comments (Atom)