C.5 ping Command
C.5 ping Command
The ping command sends the ICMP ECHO_REQUEST packet to network hosts.
In certain configurations of the ping command, the command output allows you to identify a network link or a node that has experienced a problem. The destination host is specified by the variable: hostname.
Table C-5 lists the operands/options of the ping command and how they are useful for troubleshooting.
In certain configurations of the ping command, the command output allows you to identify a network link or a node that has experienced a problem. The destination host is specified by the variable: hostname.
Table C-5 lists the operands/options of the ping command and how they are useful for troubleshooting.
Operand/option | Description | Application |
---|---|---|
hostname | When you send a probe packet to hostname, a message is returned. | Allows you to confirm that a host is active on the network. |
-g hostname |
Forces the probe packet to go through the specified gateway. | Allows you to test the quality of individual routes by sending packets to the target host via the various specified routes. |
-i interface |
Specifies the interface to be used for sending and receiving a probe packet. | Allows you to easily check the secondary network interface. |
-n |
Converts a host name into an IP address and then displays it. | Allows you to check the IP address instead of the host name. |
-s |
ping is repeated at an interval of 1 second. Pressing the [Ctrl] + [C] keys stops ping, and then displays the statistics. |
Allows you to check intermittent or long-term network events. You can view nighttime network events at a glance by piping the ping output to a file. |
-svR |
Displays the routes that probe packets have passed through at an interval of 1 second. | Displays the routes and hop counts of probe packets, allowing you to compare multiple routes to identify any bottleneck. |
The following example shows the output from the ping command.
# ping -s 10.24.187.50 PING 10.24.187.50: 56 data bytes 64 bytes from 10.24.187.50: icmp_seq=0. time=0.555 ms 64 bytes from 10.24.187.50: icmp_seq=1. time=0.400 ms 64 bytes from 10.24.187.50: icmp_seq=2. time=0.447 ms ^C ----10.24.187.50 PING Statistics---- 3 packets transmitted, 3 packets received, 0% packet loss round-trip (ms) min/avg/max/stddev = 0.400/0.467/0.555/0.079 # |
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