mpcd man page on Archlinux

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mpcd(8)			     Maintenance Commands		       mpcd(8)

       mpcd - ATM MPOA (Multi-Protocol Over ATM) client daemon

       mpcd  [	-s Control ATM address ] [ -l Data ATM address ] [ -c MPS con‐
       trol ATM address ] [ -i Interface number ] [ -m MPS MAC address ] [  -L
       LEC address [ -n ELAN name ] [ -C LECS Address ]]

       MPOA  client  (MPC) is responsible for creating and receiving internet‐
       work layer shortcuts. Using these shortcuts MPCs forward unicast inter‐
       network	layer  packets	effectively  over ATM without need for routing

       MPC has two roles; ingress and egress.  In  ingress  role  MPC  detects
       flows destined outside it's own subnet and tries to establish shortcuts
       to those destinations. In egress role MPC accepts shortcuts and packets
       arriving	 on  those  shortcuts.	Maintaining shortcuts is done with the
       help of MPOA server (MPS).

       Just as the Linux LAN Emulation client, MPOA client is also divided  in
       two  parts.  The	 parts	are kernel component and a daemon process. The
       daemon opens and receives data shortcuts and control  connections  with
       the  kernel component. The kernel component tallies packets flowing out
       from the LANE device and makes the decision if a packet should be  for‐
       warded using LANE or MPOA shortcuts.

       If  the daemon is killed with SIGHUP it will close all the open connec‐
       tions, purge ingress and egress cache entries, query LECS if applicable
       and then restart itself.

       Linux  MPOA client only supports non-LLC-muxed shortcuts. The number of
       supported MPOA clients is unlimited.

       -s Control ATM address
	      Local ATM address this MPC uses for MPOA control connections.

       -l Data ATM address
	      Local ATM address from and to which MPOA	shortcuts  are	estab‐

       -c MPS control ATM address
	      ATM  address  of MPS. Only needed if MPS can not advertise it by

       -i Interface number
	      The interface number of LEC this MPC serves. E.g. 2 for "lec2".

       -m MPS MAC address
	      MAC address of default router where MPS recides. Only useful  if
	      the MPOA server fails to advertise itself.

       -L LEC address
	      Listen  address  of  the	LANE  client  zeppelin. mpcd uses this
	      address as its own ATM address when it queries LECS for MPC con‐
	      figuration  parameters.  If this option is not present then mpcd
	      will not use LECS to query for  configuration  parameters.  This
	      option is normally the same as zeppelin's -l option.

       -n ELAN name
	      Name of the ELAN for which mpcd asks for parameters when it con‐
	      nects to LECS.  If this option is not given, LECS should respond
	      with  parameters	belonging  to  the default ELAN if one exists.
	      This option is normally the same as zeppelin's -n option.

       -C LECS address
	      ATM address of LECS mpcd asks for parameters. If this option  is
	      left  empty  and -L is given, mpcd uses ATM Forum assigned Well-
	      Known LECS address. This option is normally  the	same  as  zep‐
	      pelin's -c option.

       This  script  snippet  shows  how  to run LANE and MPOA. After UNI sig‐
       nalling and ILMI have been started LANE (zeppelin) and MPOA (mpcd)  are
       started.	 The  commented	 out  line  shows how to start mpcd so that it
       queries LECS for MPC parameters.

       Arguments  jaarli[1-3]  are  local  ATM	addresses   listed   in	  file

       case "$1" in
	   cd $ATM
	   if [ -x sigd/atmsigd ] ; then
		      sigd/atmsigd -b
	   if [ -x ilmid/ilmid ] ; then
		      ilmid/ilmid -b -x
	   if [ -x led/zeppelin ] ; then
		      led/zeppelin -2 -n sampo -i2 -l jaarli3 &
		      ifconfig lec2 \
				  netmask \
		      ifconfig lec2 up
		      route add default gw
	   if [ -x mpoad/mpcd ] ; then
		      mpoad/mpcd -i2 -s jaarli1 -l jaarli2 &
		      #mpoad/mpcd -i2 -s jaarli1 -l jaarli2 \
				  -L jaarli3 -n sampo &
       exit 0

       Supports only Ethernet type of ELANs. Probably others too.

       Heikki Vatiainen <>, Sampo Saaristo <>

       zeppelin(8), atmsigd(8)

Linux				 Nov 17, 1998			       mpcd(8)

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