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na_ping - send ICMP ECHO_REQUEST packets to network hosts
ping [ -rv ] host [ count ]
ping -s [ -Rrv ] host [ packetsize ]
ping uses the ICMP protocol's mandatory ECHO_REQUEST datagram
to elicit an ICMP ECHO_RESPONSE from the specified
host or gateway. ECHO_REQUEST datagrams have an IP and
ICMP header, followed by a struct timeval and then an
arbitrary number of bytes used to fill out the packet. If
host responds, ping prints "host is alive." Otherwise,
ping will resend the ECHO_REQUEST once a second. If the
host does not respond after count retries (default value
is 20), ping will print "no answer from host." If the host
is specified as a symbolic name and the system is unable
to resolve this name to an IP address, ping will print
"unknown host host."
When the -s flag is specified, ping sends one datagram per
second and prints one line of output for every
ECHO_RESPONSE that it receives. ping computes the roundtrip
times and packet loss statistics. When the command
is terminated with a ^C, the summary statistics is displayed.
The default packetsize is 56, which translates
into 64 ICMP bytes when combined with the 8 bytes of ICMP
header.
-
-R
- Record route. Includes the RECORD_ROUTE option in
the ECHO_REQUEST packet and displays the route
buffer on returned packets. Note that the IP
header is only large enough for nine such routes.
Many hosts ignore or discard this option. The -R
option is ignored without the -s option.
-
-r
- Bypass the normal routing tables and send directly
to a host on an attached network. If the host is
not on a directly-attached network, an error is
returned.
-
-s
- Send one datagram every second.
-
-v
- Verbose output. ICMP packets other than
ECHO_RESPONSE that are received are listed.
When run from a vfiler context, (e.g. via the vfiler run
command), ping operates on the concerned vfiler.
na_ifconfig(1), na_netstat(1), na_vfiler(1)
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