3Com 10014299 manual Debugging PIM-SM, Use the pim command in system view to enter PIM view

Displaying and Debugging PIM-SM 519

By default, the time interval of interface sending Hello message is 30 seconds.

Configuring the The PIM-SM router first forwards multicast data packets by the shared tree. But if Threshold of the the multicast data rate exceeds a certain threshold value, the router for the last

Shortest Path hop of multicast packets starts the switch from the shared tree to the shortest path tree.

Make the following configuration in the system view.

Table 593 Configure the Threshold of the Shortest Path Switching From the Shared Tree to Source

Operation	Command
Configure the threshold value of the	spt-switch-threshold { traffic-rate
shortest path switching from the shared	infinity } [ accept-policy acl-number
tree to source	]
Restore the default threshold value of the	undo spt-switch-threshold [
shortest path switching from the shared	accept-policy acl-number]
tree to source

By default, the threshold value of the shortest path switches from the shared tree to source is zero. That is to say, after the router receives the first multicast data packet in the last hop, it switches immediately to the shortest path tree.

Use the pim command in system view to enter PIM view.

Displaying and	Table 594 Display and Debug PIM-SM
Debugging PIM-SM
	Operation	Command
	Display multicast forwarding list	display multicast forwarding-table [
	information	group-address ] [ source-address ]
	Display multicast core routing table	display multicast routing-table [
		group-address ] [ source-address ]
	Display BSR information	display pim bsr-info
	Display PIM protocol interface information	display pim interface [ type number ]
	Display PIM protocol multicast routing	display pim routing-table [ *g [
	table information	group-address ] **rp [ rp-address ]
		{ group-address source-address }
		]
	Display PIM adjacent routers information	display pim neighbor [ interface type
		number ]
	Display corresponding RP information of	display pim rp-info [ group-address]
	the multicast group
	Turn on the switch of multicast	debugging multicast forwarding
	forwarding table debugging information
	Turn on the switch of PIM debugging	debugging pim common { all event
	information	packet timer }
	Turn on the switch of PIM-SM debugging	debugging pim sm { all mbr mrt
	information	timer warning { recv send } {
		assert bootstarp crpadv jp
		reg regstop } }