ping man page on HP-UX

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ping(1M)							      ping(1M)

       ping - send ICMP Echo Request packets to network host

       address-family] address] interval] ttl] host count timeout]]

       address-family]	address]  interval]  ttl] host packet-size count time‐

       The command sends ICMP Echo Request (ECHO_REQUEST) packets to the  host
       once  per  second.   Each  packet  that is echoed back via an ICMP Echo
       Response packet is written to the standard output, including round-trip

       ICMP  Echo Request datagrams ("pings") have an IP and ICMP header, fol‐
       lowed by a (see gettimeofday(2)) and an arbitrary number of "pad" bytes
       used  to fill out the packet.  The default datagram length is 64 bytes,
       but this can be changed by using the packet-size option.

       The following options and parameters are recognized by

	      If	  host is a multicast address,	send  multicast	 data‐
			  grams	 from  the interface with the local IP address
			  specified  by	 address  in   "dot"   notation	  (see
			  inet(3N)).   If  the option is not specified, multi‐
			  cast datagrams are sent from the default  interface,
			  which	 is determined by the route configuration.  If
			  host is not  a  multicast  address,  the  option  is

	      Insert an IP Record Route option in outgoing packets,
			  summarizing  routes  taken  when  the command termi‐

			  It may not be possible to get the round-trip path if
			  some	hosts  on the route taken do not implement the
			  IP Record Route option.  A  maximum  of  9  Internet
			  addresses  can be recorded due to the maximum length
			  of the IP option area.

	      The new Path MTU information is displayed when a ICMP
			  message is received from a gateway.  The option must
			  be  used  in conjunction with a large packetsize and
			  with the option.

	      Bypass the normal routing tables and send directly
			  to a host on an attached network.  If	 the  host  is
			  not  on  a  directly-connected  network, an error is
			  returned.  This option can be used to ping the local
			  system  through  an  interface  that	has  no	 route
			  through it, such as, after the interface was dropped
			  by (see gated(1M)).

	      If	  host	is  a  multicast address, set the time-to-live
			  field in the multicast datagram to ttl.   This  con‐
			  trols the scope of the multicast datagrams by speci‐
			  fying the maximum number of external systems through
			  which the datagram can be forwarded.

			  If  ttl  is  zero, the datagram is restricted to the
			  local system.	  If  ttl  is  one,  the  datagram  is
			  restricted  to systems that have an interface on the
			  network directly connected to the  interface	speci‐
			  fied by the option.  If ttl is two, the datagram can
			  be forwarded through one  multicast  router  at  the
			  most; and so forth.  zero to 255.  The default value
			  is 1.

	      This option specifies the
			  interval in  seconds,	 between  each	packet	to  be
			  transmitted.	The default interval is 1 second.

	      Verbose output.
			  Show ICMP packets other than Echo Responses that are

	      The	  address-family determines whether  the  host	is  an
			  IPv4	or  IPv6 host.	The address families currently
			  supported  are  for  IPv4  addresses	and  for  IPv6

	      host	  Destination  to  which  the  ICMP  Echo Requests are
			  sent.	 host can be a hostname or  an	IPv4  or  IPv6
			  Internet  address.  All symbolic names specified for
			  host are looked up by using (see gethostent(3N)) for
			  IPv4,	 and  (see getaddrinfo(3N)) for IPv6.  If host
			  is an Internet address, it must be in "dot" notation
			  (see	inet(3N))  for	IPv4,  and in "colon" notation
			  (see inet6(3N)) for IPv6.

			  If the address-family is specified, and host	is  an
			  Internet address, the address family of the Internet
			  address must be the same as that  specified  in  the
			  address-family option.  If the address-family is not
			  specified, and host is a symbolic name,  an  attempt
			  will	be  made  to resolve host into an IPv4 address
			  first.  If that fails, a second attempt will be made
			  to resolve host into an IPv6 address.

			  The  ping  command  does not accept IPv4-mapped IPv6
			  addresses.  To ping an IPv4 node,  an	 IPv4  address
			  should be used.  IPv4-mapped IPv6 addresses are used
			  to address IPv4-only nodes from an IPv6  node	 in  a
			  socket program only.	IPv4-mapped IPv6 addresses are
			  always converted to an IPv4 address before they  are
			  used in packets sent over the network.

			  If  a system does not respond as expected, the route
			  might be configured  incorrectly  on	the  local  or
			  remote  system  or  on  an  intermediate gateway, or
			  there might be some  other  network  failure.	  Nor‐
			  mally,  host	is  the address assigned to a local or
			  remote network interface.

			  (inet only) If host is a broadcast address, all sys‐
			  tems	that  receive  the  broadcast  should respond.
			  Normally, these are only systems that have a network
			  interface on the same network as the local interface
			  sending the ICMP Echo Request.

			  If host is a multicast address,  only	 systems  that
			  have	joined	the  multicast	group  should respond.
			  These may be distant systems if the option is speci‐
			  fied, and there is a multicast router on the network
			  directly connected to the interface specified by the

	      packet-size The  size  of	 the transmitted packet, in bytes.  By
			  default (when packet-size  is	 not  specified),  the
			  size	of transmitted packets is 64 bytes.  The mini‐
			  mum value allowed for packet-size is	8  bytes,  and
			  the maximum value is 65500 bytes.  If packet-size is
			  smaller than 16 bytes, there is not enough room  for
			  timing  information.	 In  that case, the round-trip
			  times are not displayed.

	      The number of packets
			  will transmit before terminating.  The is not needed
			  if  also  specifying	packet-size.   Range:  zero to
			  2147483647.  The default  is	zero,  in  which  case
			  sends packets until interrupted.

	      Override the default timeout value (10 seconds) which
			  uses	to timeout (in seconds) when a host or network
			  is unreachable.  This option is valid only with  the
			  option  or  when  count  is  specified.   The option
			  should not be used with count equal to 0.

			  The option is not effective for reachable  hosts  or

   Using ping for Fault Isolation
       When  using for fault isolation, first specify a local address for host
       to verify that the local network interface is working correctly.	  Then
       specify	host  and gateway addresses further and further away to deter‐
       mine the point of failure.  sends one datagram per second, and it  nor‐
       mally  writes  one  line of output for every ICMP Echo Response that is
       received.  No output is produced if there  are  no  responses.	If  an
       optional count is given, only the specified number of requests is sent.
       Round-trip times and packet loss statistics  are	 computed.   When  all
       responses  have	been  received	or the command times out (if the count
       option is specified), or if the command is terminated with  a  a	 brief
       summary is displayed.

       This  command  is  intended  for use in testing, managing and measuring
       network performance.  It should be used primarily  to  isolate  network
       failures.   Because  of	the load it could impose on the network, it is
       considered discourteous to use unnecessarily during  normal  operations
       or from automated scripts.

       exits with one of the following values:

       On success.

       On failure such as unknown host, illegal packet size, etc.

       On a unreachable host or network.

       was developed in the Public Domain.

       getaddrinfo(3N), gethostent(3N), inet(3N), inet6(3N).


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