Dvmrp And Pim Comparison; Flood And Prune Versus Shared And Shortest Path Trees - Avaya 8800 Planning And Engineering, Network Design

The system does not advertise or redistribute routes from the multicast-static IP route table. The
system uses these routes only for RPF calculation. The system uses the following rules to
determine RPF:
• Direct or local routes for a destination take precedence over a route for the same destination in
the static route table.
• If a route exists in the static route table, and no route exists in the unicast routing table for the
destination, the system uses the route in the static route table.
• If a route is available in both the unicast routing table and the static route table, the system
uses the route from the static route table only if the administrative distance is less than or equal
to that of the unicast route entry.
• If no route exists in the static route table for the destination, the system uses the route from the
unicast routing table, if available.
• The system performs a longest prefix match during a lookup in the static route table. The
lookup ignores routes that are administratively disabled.
• After the system performs a lookup within the static mroute table, if multiple routes exist for a
matching prefix, the system chooses the route with the least preference. If multiple routes exist
with a matching prefix and the same preference, the system chooses the route with the highest
RPF address. This selection method only occurs within the static mroute table; the system still
compares the selected route with a route from RTM, if one exists.

DVMRP and PIM comparison

DVMRP and PIM have some major differences in the way they operate and forward IP multicast
traffic. Choose the protocol that is better adapted to your environment. If necessary, you can use a
mix of the two protocols in different sections of the network and link them together with the MBR
feature.
DVMRP and PIM comparison navigation
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Flood and prune versus shared and shortest path trees

• Unicast routes for PIM versus DMVRP own routes
• Convergence and timers
• PIM versus DVMRP shutdown
Flood and prune versus shared and shortest path trees
DVMRP uses flood and prune operations whereas PIM-SM uses shared and shortest-path trees.
DVMRP is suitable for use in a dense environment where receivers are present in most parts of the
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Planning and Engineering — Network Design
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DVMRP and PIM comparison
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