Display Real-Time Information from Device to Host
This section describes how to display real-time monitoring information about each device between the device and a destination host.
Display Real-Time Monitoring Information
To display real-time monitoring information about each device
between the device and a specified destination host, enter the traceroute monitor command with the following syntax:
user@host> traceroute monitor host <count number> <inet | inet6> <interval seconds> <no-resolve> <size bytes><source source-address> <summary>
Table 1 describes
the traceroute monitor command options.
Option |
Description |
|---|---|
|
Sends traceroute packets to the hostname or IP address you specify. |
|
(Optional) Limits the number of ping requests, in packets, to send in summary mode. If you do not specify a count, ping requests are continuously sent until you press Q. |
|
(Optional) Forces the traceroute packets to an IPv4 destination. |
|
(Optional) Forces the traceroute packets to an IPv6 destination. |
|
(Optional) Sets the interval between ping
requests, in seconds. The default value is |
|
(Optional) Suppresses the display of the hostnames of the hops along the path. |
|
(Optional) Sets the size of the ping request
packet. The size can be from |
|
(Optional) Uses the source address that you specify, in the traceroute packet. |
|
(Optional) Displays the summary traceroute information. |
To quit the traceroute monitor command, press Q.
The following is sample output from a traceroute monitor command:
user@host> traceroute monitor host2
My traceroute [v0.69]
host (0.0.0.0)(tos=0x0 psize=64 bitpattern=0x00) Wed Mar 14 23:14:11 2007
Keys: Help Display mode Restart statistics Order of fields quit
Packets Pings
Host Loss% Snt Last Avg Best Wrst StDev
1. 173.24.232.66 0.0% 5 9.4 8.6 4.8 9.9 2.1
2. 173.24.232.66 0.0% 5 7.9 17.2 7.9 29.4 11.0
3. 173.24.232.66 0.0% 5 9.9 9.3 8.7 9.9 0.5
4. 173.24.232.66 0.0% 5 9.9 9.8 9.5 10.0 0.2
Table 2 summarizes the output fields of the display.
Field |
Description |
|---|---|
|
Hostname or IP address of the device issuing
the |
|
Size of ping request packet, in bytes. |
| Keys | |
|
Displays the Help for the CLI commands. Press H to display the Help. |
|
Toggles the display mode. Press D to toggle the display mode |
|
Restarts the Press R to restart the |
|
Sets the order of the displayed fields. Press O to set the order of the displayed fields. |
|
Quits the Press Q to quit the |
| Packets | |
number |
Number of the hop (device) along the route to the final destination host. |
|
Hostname or IP address of the device at each hop. |
|
Percent of packet loss. The number of ping responses divided by the number of ping requests, specified as a percentage. |
| Pings | |
|
Number of ping requests sent to the device at this hop. |
|
Most recent round-trip time, in milliseconds, to the device at this hop. |
|
Average round-trip time, in milliseconds, to the device at this hop. |
|
Shortest round-trip time, in milliseconds, to the device at this hop. |
|
Longest round-trip time, in milliseconds, to the device at this hop. |
|
Standard deviation of round-trip times, in milliseconds, to the device at this hop. |
Display Multicast Path Information
To display information about a multicast path from a source
to the device, enter the mtrace from-source command with
the following syntax:
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 3 describes
the mtrace from-source command options.
Option |
Description |
|---|---|
|
Traces the path to the specified hostname or IP address. |
|
(Optional) Sets the number of extra hops to
trace past nonresponsive devices. Specify a value from |
|
(Optional) Traces the path for the specified
group address. The default value is |
|
(Optional) Sets the interval between statistics
gathering. The default value is |
|
(Optional) Sets the maximum number of hops
to trace toward the source. Specify a value from |
|
(Optional) Sets the maximum number of query
attempts for any hop. Specify a value from |
|
(Optional) Sends the response packets to the specified hostname or IP address. By default, the response packets are sent to the device. |
|
(Optional) Traces the routing instance you specify. |
|
(Optional) Sets the time-to-live (TTL) value
in the IP header of the query packets. Specify a hop count from |
|
(Optional) Sets the time to wait for a response
packet. The default value is |
|
(Optional) Loops indefinitely, displaying
rate and loss statistics. To quit the |
|
(Optional) Forces the responses to use multicast. |
|
(Optional) Forces the response packets to use unicast. |
|
(Optional) Does not display hostnames. |
|
(Optional) Does not use the device alert IP option in the IP header. |
|
(Optional) Does not display packet rates and losses. |
|
(Optional) Displays packet rates and losses if a group address is specified. |
The following is sample output from the mtrace from-source command:
user@host> mtrace from-source source 192.1.4.1 group 224.1.1.1
Mtrace from 192.1.4.1 to 192.1.30.2 via group 224.1.1.1 Querying full reverse path... * * 0 ? (192.1.30.2) -1 ? (192.1.30.1) PIM thresh^ 1 -2 routerC.mycompany.net (192.1.40.2) PIM thresh^ 1 -3 hostA.mycompany.net (192.1.4.1) Round trip time 22 ms; total ttl of 2 required. Waiting to accumulate statistics...Results after 10 seconds: Source Response Dest Overall Packet Statistics For Traffic From 192.1.4.1 192.1.30.2 Packet 192.1.4.1 To 224.1.1.1 v __/ rtt 16 ms Rate Lost/Sent = Pct Rate 192.168.195.37 192.1.40.2 routerC.mycompany.net v ^ ttl 2 0/0 = -- 0 pps 192.1.40.1 192.1.30.1 ? v \__ ttl 3 ?/0 0 pps 192.1.30.2 192.1.30.2 Receiver Query Source
Each line of the trace display is usually in the following format (depending on the options selected and the responses from the devices along the path):
hop-number host (ip-address) protocolttl
Table 4 summarizes the output fields of the display.
The packet statistics gathered from Juniper Networks devices
and routing nodes always display as 0.
Field |
Description |
|---|---|
|
Number of the hop (device) along the path. |
|
Hostname, if available, or IP address of the
device. If the |
|
IP address of the device. |
|
Protocol used. |
|
TTL threshold. |
|
Total time between the sending of the query packet and the receiving of the response packet. |
|
Total number of hops required to reach the source. |
|
Source IP address of the response packet. |
|
Response destination IP address. |
|
Average packet rate for all traffic at each hop. |
|
Number of packets lost, number of packets sent, percentage of packets lost, and average packet rate at each hop. |
|
IP address receiving the multicast packets. |
|
IP address of the host sending the query packets. |