Shared Trees - Cisco Nexus 7000 Series Configuration Manual

Overview

Shared Trees

Figure 2: Source Tree
The notation (S, G) represents the multicast traffic from source S on group G. The SPT in this figure is written
(192.0.2.1, 224.1.1.1). Multiple sources can be transmitting on the same group.
Shared Trees
A shared tree represents the shared distribution path that the multicast traffic takes through the network from
a shared root or rendezvous point (RP) to each receiver. (The RP creates an SPT to each source.) A shared
tree is also called an RP tree (RPT). The figure below shows a shared tree for group 224.1.1.1 with the RP at
router D. Source hosts A and D send their data to router D, the RP, which then forwards the traffic to receiver
hosts B and C.
The notation (*, G) represents the multicast traffic from any source on group G. The shared tree in this figure
is written (*, 224.2.2.2).
Cisco Nexus 7000 Series NX-OS Multicast Routing Configuration Guide
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