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ssmping(1)							    ssmping(1)

NAME
       ssmping	-  check  if  you can receive IPv4/IPv6 multicast data from an
       internet host

SYNOPSIS
       ssmping [ -46v ] [ -I interface ] [ -c count ] [ -s size ] host

       ssmpingd

DESCRIPTION
       ssmping and ssmpingd are network level multicast management tools  that
       can  be used to check whether one can receive multicast packets via SSM
       from a host.  The host target given to ssmping must  run	 the  ssmpingd
       daemon,	which  listens	on  UDP	 port  4321  for IPv4 and IPv6 unicast
       requests.  When it receives one, it responds to a well known SSM multi‐
       cast  group  which  ssmping just have joined.  Depending on whether the
       request was made with IPv4 or IPv6,  the	 group	is  232.43.211.234  or
       ff3e::4321:1234 respectively.

OPTIONS
       For ssmpingd there are no options.  For ssmping the options are as fol‐
       lows.

       -4     Force IPv4

       -6     Force IPv6

       -v     Print client and server version information.

       -I interface
	      Interface to join on

       -c count
	      Stop after sending (and receiving) count requests (and replies)

       -s size
	      Request replies to have a size of size bytes

SEE ALSO
       asmping(1) a tool for checking whether can receive ASM.

       dbeacon(1) a distributed beacon multicast implementation.

BUGS
       Please report them to Stig Venaas <venaas@uninett.no>,  the  author  of
       this tool.

HISTORY
       ssmping	and  ssmpingd  were  developed by Stig Venaas during the early
       days of the m6bone, the IPv6 multicast backbone.

				 User Manuals			    ssmping(1)

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