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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<HTML
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>ping</TITLE
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>eCos Reference Manual</TH
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><HR
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WIDTH="100%"></DIV
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><H1
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><A
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NAME="PING-COMMAND">ping</H1
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><DIV
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CLASS="REFNAMEDIV"
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><A
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NAME="AEN3744"
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></A
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><H2
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>Name</H2
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>ping&nbsp;--&nbsp;Verify network connectivity</DIV
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><DIV
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CLASS="REFSYNOPSISDIV"
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><A
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NAME="AEN3747"><H2
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>Synopsis</H2
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><P
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><B
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CLASS="COMMAND"
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>ping</B
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>  [-v ] [-i <TT
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CLASS="REPLACEABLE"
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><I
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> local_IP_address</I
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></TT
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>] [-l <TT
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CLASS="REPLACEABLE"
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><I
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> length</I
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></TT
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>] [-n <TT
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CLASS="REPLACEABLE"
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><I
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> count</I
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></TT
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>] [-t <TT
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CLASS="REPLACEABLE"
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><I
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> timeout</I
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></TT
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>] [-r <TT
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CLASS="REPLACEABLE"
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><I
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> rate</I
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></TT
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>] {-h <TT
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CLASS="REPLACEABLE"
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><I
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> server_IP_address</I
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></TT
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>}</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN3763"
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></A
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><H2
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>Arguments</H2
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><DIV
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CLASS="INFORMALTABLE"
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><A
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NAME="AEN3765"><P
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></P
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><TABLE
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BORDER="1"
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CLASS="CALSTABLE"
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><THEAD
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><TR
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><TH
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WIDTH="25%"
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ALIGN="LEFT"
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>Name</TH
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><TH
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ALIGN="LEFT"
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VALIGN="TOP"
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>Type</TH
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><TH
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>Description</TH
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><TH
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>Default</TH
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></THEAD
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><TBODY
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><TD
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WIDTH="25%"
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>-v</TD
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><TD
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VALIGN="TOP"
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>Boolean</TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>Be verbose, displaying information about each packet sent.</TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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><SPAN
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CLASS="emphasis"
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><I
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>quiet</I
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></SPAN
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></TD
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></TR
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><TR
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>-n <TT
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CLASS="REPLACEABLE"
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><I
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>local_IP_address</I
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></TT
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></TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>Number</TD
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><TD
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WIDTH="25%"
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VALIGN="TOP"
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>Controls the number of packets to be sent.</TD
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><TD
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>10</TD
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></TR
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><TR
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>-i <TT
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CLASS="REPLACEABLE"
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><I
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>local_IP_address</I
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></TT
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></TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>Numeric IP or DNS name</TD
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><TD
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ALIGN="LEFT"
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VALIGN="TOP"
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>The IP address RedBoot should use.</TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>Value set by <B
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CLASS="COMMAND"
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>ip_address</B
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></TD
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></TR
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><TR
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>-h <TT
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CLASS="REPLACEABLE"
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><I
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>server_IP_address</I
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></TT
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></TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>Numeric IP or DNS name</TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>The IP address of the host to contact.</TD
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><TD
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ALIGN="LEFT"
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VALIGN="TOP"
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><SPAN
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CLASS="emphasis"
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><I
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>none</I
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></SPAN
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></TD
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></TR
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><TR
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>-l <TT
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CLASS="REPLACEABLE"
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><I
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>length</I
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></TT
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></TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>Number</TD
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><TD
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ALIGN="LEFT"
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VALIGN="TOP"
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>The length of the ICMP data payload.</TD
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><TD
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VALIGN="TOP"
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>64</TD
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></TR
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><TR
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>-r <TT
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CLASS="REPLACEABLE"
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><I
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>length</I
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></TT
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></TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>Number</TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>How fast to deliver packets, i.e. time between successive sends.
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A value of 0 sends packets as quickly as possible.</TD
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><TD
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WIDTH="25%"
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VALIGN="TOP"
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>1000ms (1 second)</TD
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></TR
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><TR
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>-t <TT
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CLASS="REPLACEABLE"
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><I
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>length</I
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></TT
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></TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>Number</TD
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><TD
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WIDTH="25%"
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ALIGN="LEFT"
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VALIGN="TOP"
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>How long to wait for the round-trip to complete, specified in milliseconds.</TD
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><TD
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ALIGN="LEFT"
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>1000ms (1 second)</TD
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><DIV
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><A
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NAME="AEN3822"
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></A
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><H2
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>Description</H2
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><P
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>The <B
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CLASS="COMMAND"
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>ping</B
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> command checks the connectivity of the local network by sending
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special (ICMP) packets to a specific host. These packets should be automatically
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returned by that host. The command will indicate how many of these round-trips
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were successfully completed.
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      </P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN3826"
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></A
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><H2
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>Examples</H2
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><P
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>Test connectivity to host 192.168.1.101.
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<TABLE
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><TR
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><TD
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><PRE
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CLASS="SCREEN"
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>RedBoot&#62; <TT
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CLASS="USERINPUT"
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><B
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>ping -h 192.168.1.101</B
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></TT
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>
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Network PING - from 192.168.1.31 to 192.168.1.101
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PING - received 10 of 10 expected</PRE
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></TD
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></TR
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></TABLE
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> </P
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><P
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>Test connectivity to host 192.168.1.101, with verbose reporting.
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<TABLE
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><TR
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><TD
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><PRE
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CLASS="SCREEN"
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>RedBoot&#62; <TT
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CLASS="USERINPUT"
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><B
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>ping -h 192.168.1.101 -v -n 4</B
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></TT
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>
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Network PING - from 192.168.1.31 to 192.168.1.101
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 seq: 1, time: 1 (ticks)
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 seq: 2, time: 1 (ticks)
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 seq: 3, time: 1 (ticks)
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 seq: 4, time: 1 (ticks)
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PING - received 10 of 10 expected</PRE
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></TD
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></TR
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></TABLE
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> </P
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><TR
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><TD
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><PRE
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CLASS="SCREEN"
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>Test connectivity to a non-existent host (192.168.1.109).
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RedBoot&#62; <TT
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CLASS="USERINPUT"
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><B
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>ping -h 192.168.1.109 -v -n 4</B
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></TT
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>
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PING: Cannot reach server '192.168.1.109' (192.168.1.109)</PRE
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></TD
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>
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HREF="mfill-command.html"
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>Prev</A
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HREF="ecos-ref.html"
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>mfill</TD
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>reset</TD
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