Monitoring Network Traffic Using TraceroutePurpose Use the Traceroute page in the J-Web interface to trace a route between the switch anda remote host. You can use a traceroute task to display a list of waypoints between theswitch and a specified destination host. The output is useful for diagnosing a point offailure in the path from the switch platform to the destination host and addressing networktraffic latency and throughput problems.Action To use the traceroute tool:1. Select Troubleshoot>Traceroute.2. Next to Advanced options, click the expand icon.3. Enter information into the Traceroute page.The Remote Host field is the only required field.4. Click Start.5. To stop the traceroute operation before it is complete, click OK while the results ofthe traceroute operation are being displayed.Meaning The switch generates the list of waypoints by sending a series of ICMP traceroute packetsin which the time-to-live (TTL) value in the messages sent to each successive waypointis incremented by 1. (The TTL value of the first traceroute packet is set to 1.) In this manner,each waypoint along the path to the destination host replies with a Time Exceeded packetfrom which the source IP address can be obtained.The results of the traceroute operation are displayed in the main pane. If no options arespecified, each line of the traceroute display is in the following format:hop-number host (ip-address) [as-number] time1 time2 time3The switch sends a total of three traceroute packets to each waypoint along the pathand displays the round-trip time for each traceroute operation. If the switch times outbefore receiving a Time Exceeded message, an asterisk (*) is displayed for that round-triptime.Table 462: Traceroute field summaryYour ActionFunctionFieldType the hostname or IP address of thedestination host.Identifies the destination host of the traceroute.Remote HostAdvanced OptionsTo suppress the display of the hophostnames, select the check box.Determines whether hostnames of the hops along thepath are displayed, in addition to IP addresses.Don't ResolveAddressesType the gateway IP address.Specifies the IP address of the gateway to route through.Gateway3515Chapter 132: Monitoring General Network Traffic and Hosts
