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asmping(1)							    asmping(1)

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

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

       ssmpingd

DESCRIPTION
       asmping and ssmpingd are network level multicast management tools  that
       can  be used to check whether one can receive multicast packets via ASM
       from a host.  The host target given to asmping must  run	 the  ssmpingd
       daemon,	which  listens	on  UDP	 port  4321  for IPv4 and IPv6 unicast
       requests.  When it receives one, it responds to the specified multicast
       group  which asmping just have joined.  Note that one can not use arbi‐
       trary groups. Independent of what group is specified, the last  quarter
       of  the	address	 is  forced  to be 234 or ::4321:1234 for IPv4 or IPv6
       respectively.

OPTIONS
       For ssmpingd there are no options.  For asmping 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
       ssmping(1) a tool for checking whether can receive SSM.

       dbeacon(1) a distributed beacon multicast implementation.

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

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

				 User Manuals			    asmping(1)

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