📄 ping-command.html
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><H1
><A
NAME="PING-COMMAND"
></A
>ping</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN1658"
></A
><H2
>Name</H2
>ping -- Verify network connectivity</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN1661"
></A
><H2
>Synopsis</H2
><P
><B
CLASS="COMMAND"
>ping</B
> [-v ] [-i <TT
CLASS="REPLACEABLE"
><I
> local_IP_address</I
></TT
>] [-l <TT
CLASS="REPLACEABLE"
><I
> length</I
></TT
>] [-n <TT
CLASS="REPLACEABLE"
><I
> count</I
></TT
>] [-t <TT
CLASS="REPLACEABLE"
><I
> timeout</I
></TT
>] [-r <TT
CLASS="REPLACEABLE"
><I
> rate</I
></TT
>] {-h <TT
CLASS="REPLACEABLE"
><I
> server_IP_address</I
></TT
>}</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN1677"
></A
><H2
>Arguments</H2
><DIV
CLASS="INFORMALTABLE"
><P
></P
><A
NAME="AEN1679"
></A
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><TR
><TH
>Name</TH
><TH
>Type</TH
><TH
>Description</TH
><TH
>Default</TH
></TR
></THEAD
><TBODY
><TR
><TD
>-v</TD
><TD
>Boolean</TD
><TD
>Be verbose, displaying information about each packet sent.</TD
><TD
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>quiet</I
></SPAN
></TD
></TR
><TR
><TD
>-n <TT
CLASS="REPLACEABLE"
><I
>local_IP_address</I
></TT
></TD
><TD
>Number</TD
><TD
>Controls the number of packets to be sent.</TD
><TD
>10</TD
></TR
><TR
><TD
>-i <TT
CLASS="REPLACEABLE"
><I
>local_IP_address</I
></TT
></TD
><TD
>Numeric IP or DNS name</TD
><TD
>The IP address RedBoot should use.</TD
><TD
>Value set by <B
CLASS="COMMAND"
>ip_address</B
></TD
></TR
><TR
><TD
>-h <TT
CLASS="REPLACEABLE"
><I
>server_IP_address</I
></TT
></TD
><TD
>Numeric IP or DNS name</TD
><TD
>The IP address of the host to contact.</TD
><TD
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>none</I
></SPAN
></TD
></TR
><TR
><TD
>-l <TT
CLASS="REPLACEABLE"
><I
>length</I
></TT
></TD
><TD
>Number</TD
><TD
>The length of the ICMP data payload.</TD
><TD
>64</TD
></TR
><TR
><TD
>-r <TT
CLASS="REPLACEABLE"
><I
>length</I
></TT
></TD
><TD
>Number</TD
><TD
>How fast to deliver packets, i.e. time between successive sends.
A value of 0 sends packets as quickly as possible.</TD
><TD
>1000ms (1 second)</TD
></TR
><TR
><TD
>-t <TT
CLASS="REPLACEABLE"
><I
>length</I
></TT
></TD
><TD
>Number</TD
><TD
>How long to wait for the round-trip to complete, specified in milliseconds.</TD
><TD
>1000ms (1 second)</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN1736"
></A
><H2
>Description</H2
><P
>The <B
CLASS="COMMAND"
>ping</B
> command checks the connectivity of the local network by sending
special (ICMP) packets to a specific host. These packets should be automatically
returned by that host. The command will indicate how many of these round-trips
were successfully completed.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN1740"
></A
><H2
>Examples</H2
><P
>Test connectivity to host 192.168.1.101.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>RedBoot> <KBD
CLASS="USERINPUT"
>ping -h 192.168.1.101</KBD
>
Network PING - from 192.168.1.31 to 192.168.1.101
PING - received 10 of 10 expected</PRE
></TD
></TR
></TABLE
> </P
><P
>Test connectivity to host 192.168.1.101, with verbose reporting.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>RedBoot> <KBD
CLASS="USERINPUT"
>ping -h 192.168.1.101 -v -n 4</KBD
>
Network PING - from 192.168.1.31 to 192.168.1.101
seq: 1, time: 1 (ticks)
seq: 2, time: 1 (ticks)
seq: 3, time: 1 (ticks)
seq: 4, time: 1 (ticks)
PING - received 10 of 10 expected</PRE
></TD
></TR
></TABLE
> </P
><P
><TABLE
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BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>Test connectivity to a non-existent host (192.168.1.109).
RedBoot> <KBD
CLASS="USERINPUT"
>ping -h 192.168.1.109 -v -n 4</KBD
>
PING: Cannot reach server '192.168.1.109' (192.168.1.109)</PRE
></TD
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