Provided by: atm-tools_2.4.1-17_i386 bug


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


       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 ]]


       MPOA  client  internetwork  layer shortcuts. Using these shortcuts MPCs
       forward unicast internetwork 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

       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
       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

       -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
              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

       -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.


       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

       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)