PING

Test a network connection - if successful, ping returns the ip address.

Syntax
      PING [options] destination_host

Options
    -w timeout     Timeout in milliseconds to wait for each reply, default=4000.
    -i TTL         Time To Live.
    -v TOS         Type Of Service.
    -a             Resolve addresses to hostnames.
    -n count       Number of echo requests to send.
    -t             Ping the destination host until interrupted.
                   To see statistics and continue type Control-Break;
                   To stop type Control-C.
    -l size        Send buffer size (default=32).
    -f             Set don’t Fragment flag in packet (IPv4-only).
    -r count       Record route for count hops (IPv4-only).
    -s count       Timestamp for count hops (IPv4-only).
    -j host_list   Loose source route along host_list (IPv4-only).
    -k host_list   Strict source route along host_list (IPv4-only).
 destination_host  The name of the remote host
    -R             Use routing header to test reverse route also (IPv6-only).
    -S srcaddr     Source address to use.
    -4             Force using IPv4.
    -6             Force using IPv6.

A response of "Request timed out" means there was no response within the default time period of 4 seconds.
If the latency of the response is more than 4 seconds. Use the -w option to increase the time-out.
For example, to allow responses within 10 seconds, use ping -w 10000

The IPv6 options are only available on versions of Windows that support IPv6, e.g. Windows 7 /2008

A successful PING does NOT always return an %errorlevel% of 0
Therefore to reliably detect a successful ping - pipe the output into FIND and look for the text "TTL"

Note that "Reply" in the output of PING does not always indicate a positive response.
Example message: Reply from 192.168.1.254: Destination Net Unreachable.

Ping response times below 10 milliseconds often have low accuracy. A time of 10 milliseconds is roughly equal to a distance of 1860 Miles, travelling a straight line route at the speed of light, (or a round trip of 2 × 930 miles). From this you can see that ping response times will give a very very rough estimate of the distance to a remote host.

Network adminstrators do not appreciate frequent or continual pings to their servers, try not to overdo it!

How to test connectivity with ping:

1) Ping the loopback address to verify that TCP/IP is installed and configured correctly on the local computer.
PING 127.0.0.1

2) Ping the IP address of the local computer to verify that it was added to the network correctly.
PING IP_address_of_local_host

3) Ping the IP address of the default gateway to verify that the default gateway is functioning and that you can communicate with a local host on the local network.
PING IP_address_of_default_gateway

4) Ping the IP address of a remote host to verify that you can communicate through a router.
PING IP_address_of_remote_host

How to create a timed delay with ping:

Create a delay of 1 or more seconds by pinging the loopback address (127.0.0.1) multiple times.
The delay between each ping is 1 second, so for a delay of 5 seconds ping 6 times:
PING -n 6 127.0.0.1>nul
In tests this consumes less processor time than Sleep or Timeout - see Clay Calvert's original newsgroup posting.

Examples

Ping a server just once:
PING -n 1 Server64

Check if a host is reachable:
PING Server64 |find "TTL=" && ECHO MyHost found

Check if a host is not reachable:
PING Server64 |find "TTL=" || ECHO MyHost not found

Test which iSCSI IP on a specific NIC is functioning or if a specific teamed NIC is operating as it should:
Ping -S (Source IP: XXX.XXX.XXX.XXX) (Destination IP: XXX.XXX.XXX.XXX)
Ping -S 10.5.7.64  10.5.7.1


Ping a website 5 times:
PING -n 5 -w 7500 www.microsoft.com

Monitor a website (example.com) every 15 seconds:

@Echo off
Echo Logging ping responses, press CTRL-C to stop
:start
 Ping -n 1 example.com | find "TTL=" >>c:\pingtest.txt
 Echo .
 Ping -n 16 127.0.0.1>nul
goto start

The script above can be used to test an Internet connection, just replace example.com with your ISP's Default Gateway IP address. This represents the first physical device on the ISP's side of your connection. You can find the Default Gateway on your router status screen.

PING is named after the sound that a sonar makes.

“And now I see with eye serene
The very pulse of the machine” ~ William Wordsworth, (She Was a Phantom of Delight)


Related:

TRACERT - Trace route to a remote host
IPCONFIG - IP Configuration
PATHPING - Route Tracing tool
Q115388 - Resolving IP Address with Leading Zero
FreePing - Freeware Windows GUI Ping
LocaPing - Online ping
RFC5737 - IPv4 Address Blocks Reserved for Documentation
Powershell equivalent: Test-Connection - Ping one or more computers, psp function
Equivalent bash command (Linux): ping - Test a network connection


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