ping <host> tos <number> <option>
Marks a packet with a specified time of service (TOS).
- Pings the IPv4 address of the host.
- Pings the IPv6 address of the host.
- A host being pinged. This keyword is used when the host is specified as a host name rather than as an IP address.
- The tos number.
- Each of the following entries are considered options. These options can be issued consecutively, that is, in the same command line.
- Adaptively sets interpacket interval.
- Allows you to ping broadcast address.
- Makes a beep sound during every ping, while the device pings for the host details.
- Bypasses normal routing tables during ping.
- Specifies the number of ping requests to send.
- Specifies the number of seconds before which ping expires.
- Matches the overall size of the data packet with the resultant size of the Layer 3 packet.
- Sends 100 ping requests each second.
- Specifies an interface that the device must use as the source address.
- Specifies the time in seconds for which the device must wait between ping requests.
- Specifies that the device must consider the ping request for special processing.
- Specifies the path MTU discovery strategy.
- Suppresses loop-back of multicast pings.
- Does not resolve domain name system (DNS) names during ping.
- Specifies the hexadecimal digit pattern to fill the packet.
- Prints only the ping summary page.
- Records the route that the packet takes.
- Specifies the number of bytes to send for a ping request.
- Displays the timestamp during ping output.
- Marks packet with specified type of service (TOS).
- Specifies the maximum packet life-time for a host.
- Displays a detailed output for the ping command.
The ping command tests whether a network host is reachable.
The ping command uses the ECHO_REQUEST datagram (ping) of the ICMP protocol to get an ICMP ECHO_RESPONSE from a host or gateway. ECHO_REQUEST datagrams have an IP and an ICMP header, followed by a struct timeval data type and then an arbitrary number of pad bytes that are used to fill the packet.
When the ping command is interrupted by typing <Ctrl>+c, a brief statistical summary is displayed.
This example shows how to test a packet for network reachability by defining the time of service as one second.
vyatta@vyatta:~$ ping 127.0.0.1 tos 1 PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data. 64 bytes from 127.0.0.1: icmp_req=1 ttl=64 time=0.409 ms 64 bytes from 127.0.0.1: icmp_req=2 ttl=64 time=0.027 ms ^C --- 127.0.0.1 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 999ms rtt min/avg/max/mdev = 0.027/0.218/0.409/0.191 ms