Juniper Networks J-Series manual Using the mtrace from-source Command

Chapter 12: Using Services Router Diagnostic Tools

the Services Router. The mtrace monitor command monitors and displays multicast trace operations.

This section contains the following topics. For more information about mtrace commands, see the JUNOS System Basics and Services Command Reference.

■ Using the mtrace from-source Command on page 241 ■ Using the mtrace monitor Command on page 243

	Using the mtrace from-source Command
	To display information about a multicast path from a source to the Services Router,
	enter the mtrace from-sourcecommand with the following syntax. Table 124 on page
	241 describes the mtrace from-sourcecommand options.
	user@host> mtrace from-source source host <extra-hops number> <group address>
	<interval seconds> <max-hops number> <max-queries number> <response host>
	<routing-instance routing-instance-name> <ttl number> <wait-time seconds> <loop>
	<multicast-response unicast-response><no-resolve><no-router-alert> <brief
	detail>
Table 124: CLI mtrace from-source Command Options
Option	Description
source host	Traces the path to the specified hostname or IP address.
extra-hops number	(Optional) Sets the number of extra hops to trace past nonresponsive routers. Specify
	a value from 0 through 255.
group address	(Optional) Traces the path for the specified group address. The default value is 0.0.0.0.
interval seconds	(Optional) Sets the interval between statistics gathering. The default value is 10.
max-hops number	(Optional) Sets the maximum number of hops to trace toward the source. Specify a
	value from 0 through 255. The default value is 32.
max-queries number	(Optional) Sets the maximum number of query attempts for any hop. Specify a value
	from 1 through 32. The default value is 3.
response host	(Optional) Sends the response packets to the specified hostname or IP address. By
	default, the response packets are sent to the Services Router.
routing-instance	(Optional) Traces the routing instance you specify.
routing-instance-name
ttl number	(Optional) Sets the time-to-live (TTL) value in the IP header of the query packets. Specify
	a hop count from 0 through 255. The default value for local queries to the all routers
	multicast group is 1. Otherwise, the default value is 127.
wait-time seconds	(Optional) Sets the time to wait for a response packet. The default value is 3 seconds.
loop	(Optional) Loops indefinitely, displaying rate and loss statistics. To quit the mtrace
	command, press Ctrl-C.

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