mpcd(8) 						       Maintenance Commands							   mpcd(8)

NAME

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

SYNOPSIS

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

DESCRIPTION

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

       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 forwarded using LANE or MPOA shortcuts.

       If  the daemon is killed with SIGHUP it will close all the open connections, purge ingress and egress cache entries, query LECS if applica-
       ble and then restart itself.

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

OPTIONS

       -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 established.

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

       -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 configuration
	      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 connects 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 zeppelin's -c option.

EXAMPLES

       This script snippet shows how to run LANE and MPOA. After UNI signalling 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 /etc/hosts.atm.

       ATM=/usr/src/atm
       case "$1" in
       start)
	   cd $ATM
	   if [ -x sigd/atmsigd ] ; then
		      sigd/atmsigd -b
	   fi
	   if [ -x ilmid/ilmid ] ; then
		      ilmid/ilmid -b -x
	   fi
	   if [ -x led/zeppelin ] ; then
		      led/zeppelin -2 -n sampo -i2 -l jaarli3 &
		      ifconfig lec2 10.10.10.208 
				  netmask 255.255.255.192 
				  broadcast 10.10.10.255
		      ifconfig lec2 up
		      route add default gw 10.10.10.193
	   fi
	   if [ -x mpoad/mpcd ] ; then
		      mpoad/mpcd -i2 -s jaarli1 -l jaarli2 &
		      #mpoad/mpcd -i2 -s jaarli1 -l jaarli2 
				  -L jaarli3 -n sampo &
	   fi
	   ;;
       esac
       exit 0

BUGS

       Supports only Ethernet type of ELANs. Probably others too.

AUTHORS

       Heikki Vatiainen <hessu@cs.tut.fi>, Sampo Saaristo <s156953@cs.tut.fi>

SEE ALSO

       zeppelin(8), atmsigd(8)

Linux								   Nov 17, 1998 							   mpcd(8)