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<!-- Copyright (C) 2003 Red Hat, Inc.                                --><!-- This material may be distributed only subject to the terms      --><!-- and conditions set forth in the Open Publication License, v1.0  --><!-- or later (the latest version is presently available at          --><!-- http://www.opencontent.org/openpub/).                           --><!-- Distribution of the work or derivative of the work in any       --><!-- standard (paper) book form is prohibited unless prior           --><!-- permission is obtained from the copyright holder.               --><HTML><HEAD><TITLE>ping</TITLE><meta name="MSSmartTagsPreventParsing" content="TRUE"><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="eCos Reference Manual"HREF="ecos-ref.html"><LINKREL="UP"TITLE="Common Commands"HREF="common-commands.html"><LINKREL="PREVIOUS"TITLE="mfill"HREF="mfill-command.html"><LINKREL="NEXT"TITLE="reset"HREF="reset-command.html"></HEAD><BODYCLASS="REFENTRY"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">eCos Reference Manual</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="mfill-command.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="reset-command.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="PING-COMMAND">ping</H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN3744"></A><H2>Name</H2>ping&nbsp;--&nbsp;Verify network connectivity</DIV><DIVCLASS="REFSYNOPSISDIV"><ANAME="AEN3747"><H2>Synopsis</H2><P><BCLASS="COMMAND">ping</B>  [-v ] [-i <TTCLASS="REPLACEABLE"><I> local_IP_address</I></TT>] [-l <TTCLASS="REPLACEABLE"><I> length</I></TT>] [-n <TTCLASS="REPLACEABLE"><I> count</I></TT>] [-t <TTCLASS="REPLACEABLE"><I> timeout</I></TT>] [-r <TTCLASS="REPLACEABLE"><I> rate</I></TT>] {-h <TTCLASS="REPLACEABLE"><I> server_IP_address</I></TT>}</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN3763"></A><H2>Arguments</H2><DIVCLASS="INFORMALTABLE"><ANAME="AEN3765"><P></P><TABLEBORDER="1"CLASS="CALSTABLE"><THEAD><TR><THWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Name</TH><THWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Type</TH><THWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Description</TH><THWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Default</TH></TR></THEAD><TBODY><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-v</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Boolean</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Be verbose, displaying information about each packet sent.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP"><SPANCLASS="emphasis"><ICLASS="EMPHASIS">quiet</I></SPAN></TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-n <TTCLASS="REPLACEABLE"><I>local_IP_address</I></TT></TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Number</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Controls the number of packets to be sent.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">10</TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-i <TTCLASS="REPLACEABLE"><I>local_IP_address</I></TT></TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Numeric IP or DNS name</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">The IP address RedBoot should use.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Value set by <BCLASS="COMMAND">ip_address</B></TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-h <TTCLASS="REPLACEABLE"><I>server_IP_address</I></TT></TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Numeric IP or DNS name</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">The IP address of the host to contact.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP"><SPANCLASS="emphasis"><ICLASS="EMPHASIS">none</I></SPAN></TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-l <TTCLASS="REPLACEABLE"><I>length</I></TT></TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Number</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">The length of the ICMP data payload.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">64</TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-r <TTCLASS="REPLACEABLE"><I>length</I></TT></TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Number</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">How fast to deliver packets, i.e. time between successive sends.A value of 0 sends packets as quickly as possible.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">1000ms (1 second)</TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-t <TTCLASS="REPLACEABLE"><I>length</I></TT></TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Number</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">How long to wait for the round-trip to complete, specified in milliseconds.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">1000ms (1 second)</TD></TR></TBODY></TABLE><P></P></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN3822"></A><H2>Description</H2><P>The <BCLASS="COMMAND">ping</B> command checks the connectivity of the local network by sendingspecial (ICMP) packets to a specific host. These packets should be automaticallyreturned by that host. The command will indicate how many of these round-tripswere successfully completed.       </P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN3826"></A><H2>Examples</H2><P>Test connectivity to host 192.168.1.101.<TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN">RedBoot&#62; <TTCLASS="USERINPUT"><B>ping -h 192.168.1.101</B></TT>Network PING - from 192.168.1.31 to 192.168.1.101PING - received 10 of 10 expected</PRE></TD></TR></TABLE> </P><P>Test connectivity to host 192.168.1.101, with verbose reporting.<TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN">RedBoot&#62; <TTCLASS="USERINPUT"><B>ping -h 192.168.1.101 -v -n 4</B></TT>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><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN">Test connectivity to a non-existent host (192.168.1.109).RedBoot&#62; <TTCLASS="USERINPUT"><B>ping -h 192.168.1.109 -v -n 4</B></TT>PING: Cannot reach server '192.168.1.109' (192.168.1.109)</PRE></TD></TR></TABLE>       </P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="mfill-command.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ecos-ref.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="reset-command.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">mfill</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="common-commands.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">reset</TD></TR></TABLE></DIV></BODY></HTML>
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