.254 DR .253

2 PIM-SM routers .254 and .253 only the DR .254 sends Joins to the RP to build the shared-tree….

If HOST sources multicast, the DR sends Register messages to the RP….

.254 and .253 both start receiving multicast traffic from the same source RP (source is upstream from the RP say), this triggers both to send PIM Assert messages to determine forwarder, PIM Assert determine if all the routers are running the same unicast protocol, the router with the best metric wins the Assert. If the metrics are equal, the router with the highest IP address is elected. Then .253 will prune and only .254 will send….


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s