Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
mcfirst(1)		    General Commands Manual		    mcfirst(1)

NAME
       mcfirst - check if you can receive IPv4/IPv6 multicast

SYNOPSIS
       mcfirst	[ -46vr	] [ -I interface ] [ -c	count ]	[ -t time ] [ source ]
       group port

DESCRIPTION
       mcfirst can be used to check whether one	can receive multicast  packets
       from  a	host. The host may send	any type of multicast packets, any ap-
       plication, IPv4 or IPv6,	ASM  or	 SSM.	mcfirst	 joins	the  specified
       (source)	and group, and listens to the specified	port.  mcfirst will by
       default exit when the first packet is received, and print how  long  it
       waited.

OPTIONS
       The options are as follows.

       -4     Force IPv4

       -6     Force IPv6

       -v     Print version

       -r     Print rate information only

       -I interface
	      Interface	to join	on

       -c count
	      Stop  after  receiving  count  packets. Default is 1 unless time
	      limit is specified

       -t time
	      Exit after time seconds. Default is  to  exit  after  the	 first
	      packet.  If both count and time are specified, mcfirst will exit
	      as soon as one of	them is	satisfied.

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
       mcfirst	was  developed	by  Stig  Venaas  during the early days	of the
       m6bone, the IPv6	multicast backbone.

				 User Manuals			    mcfirst(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | BUGS | HISTORY

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=mcfirst&sektion=1&manpath=FreeBSD+12.0-RELEASE+and+Ports>

home | help