Use the CLI traceroute command to display a list of routers between the device and a specified destination host. This command is useful for diagnosing a point of failure in the path from the device to the destination host, and addressing network traffic latency and throughput problems.
The device generates the list of routers by sending a series of ICMP traceroute packets in which the time-to-live (TTL) value in the messages sent to each successive router is incremented by 1. (The TTL value of the first traceroute packet is set to 1.) In this manner, each router along the path to the destination host replies with a Time Exceeded packet from which the source IP address can be obtained.
Alternatively, you can use the J-Web interface. (See Tracing Unicast Routes from the J-Web Interface .)
The traceroute monitor command combines ping and traceroute functionality to display real-time monitoring information about each router between the Services Router and a specified destination host.
This section contains the following topics. For more information about traceroute commands, see the JUNOS System Basics and Services Command Reference.