3Com 10014299 manual Displaying and Debugging PIM-DM, Start/Disable PIM-DM Protocol

Displaying and Debugging PIM-DM 513

Starting the PIM-DMYou must start the PIM-DM protocol at each interface. By default, the system Protocol disables the PIM-DM protocol.

Make the following configuration in the interface view.

Table 584 Start/Disable PIM-DM Protocol

Operation	Command
Start PIM-DM protocol	pim dm
Disable PIM-DM protocol	undo pim dm

Configuring the Time After the interface starts PIM-DM protocol, it will periodically send to all the PIM

Interval for Hello routers (group address is 224.0.0.13) hello messages to find neighbors. PIM Messages query-interval timer determines the time interval. If the interface receives the hello

message, it means that there are adjacent PIM routers for this interface, and this interface adds the neighbor to its interface neighbor list. If the interface does not receive any hello message from the neighbors in the interface neighbor list within a specific period, it is assumed that the neighbor has left the multicast network.

The time interval of sending hello message can be configured according to the bandwidth and the type of the network to which the interface connects.

Make the following configuration in the interface view.

Table 585 Configure the Time Interval of Interface Sending Hello Messages

Operation	Command
Set the time interval of interface sending	pim timer hello seconds
hello messages
Restore the default value of the time	undo pim timer hello
interval of interface sending hello
messages

By default, the time interval of interface sending hello messages is 30 seconds.

Displaying and Debugging PIM-DM

Table 586 Display and Debug PIM-DM

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 IP multicast forwarding table	display multicast forwarding-table
information
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 ]
Turn on the switch of multicast	debugging multicast forwarding
forwarding table debugging information
Turn on the switch of PIM general	debugging pim common { all event
debugging information	packet timer }