Although the following illustration and example uses routers in the configuration, any device (router or
switch) can be used.
Note
Figure 10: MSDP Running Between RP Peers
When MSDP is implemented, the following sequence of events occurs:
1
When a PIM designated device (DR) registers a source with its RP as illustrated in the figure, the RP sends
a Source-Active (SA) message to all of its MSDP peers.
The DR sends the encapsulated data to the RP only once per source (when the source goes active). If the
source times out, this process happens again when it goes active again. This situation is different from the
periodic SA message that contains all sources that are registered to the originating RP. Those SA messages
are MSDP control packets, and, thus, do not contain encapsulated data from active sources.
Note
IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3.6E (Catalyst 3850 Switches)
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Configuring MSDP
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