NAME    [Toc]    [Back]

       lat_manual_setup  -  Describes  how to manually set up the
       Local Area Transport (LAT)

DESCRIPTION    [Toc]    [Back]

       To run LAT on your system, you must configure LAT in  your
       system's  kernel  (see the Network Administration: Connections
 manual).

       Optionally, you can customize your  LAT  setup.  The  customization
  section of the Network Administration: Connections
 manual includes information  on  general  customization,
 setting up printers, host-initiated connections, the
       LAT/Telnet gateway, and creating your own service.

SETTING UP LAT    [Toc]    [Back]

       To set up LAT on your system manually, you must first configure
  your  kernel  for LAT (see the Network Administration:
 Connections manual).  Then log in as  superuser  and
       perform the following steps: Create the LAT device special
       files.

              LAT supports SVR4-style and BSD-style devices.  You
              should  use  SVR4-style  devices.  See  the Network
              Administration: Connections manual for more  information.


                                     Note

              You  should  use  the  latsetup  utility  to create
              SVR4-style devices to ensure that  duplicate  minor
              numbers are not used.

              You  can  use the mknod command to create character
              devices with a major number of 5.   If  you  create
              SVR4  devices manually, you should observe the following
 rules: Start  the  SVR4  device  numbers  at
              /dev/lat/620.   This  avoids overlapping minor numbers
 from the BSD tty name space.  Make  the  minor
              number  of  the  SVR4  device the same as the name.
              For example, device /dev/lat/833 should have  minor
              number 833.  The following command would create the
              SVR4-style    LAT    device     /dev/lat/833:     #
              /usr/sbin/mknod /dev/lat/833 c 5 833

              Once  you have created the SVR4-style device, check
              the permissions of the device to make sure they are
              what you desire.

              You  can  create  BSD-style  devices by running the
              /dev/MAKEDEV script with the LAT option. The syntax
              for  the  MAKEDEV command with the LAT option is as
              follows: MAKEDEV latN

              The N variable can be 0 to 38.

              The /dev/MAKEDEV script creates one  BSD-style  LAT
              device  special  file for each LAT terminal device.
              When you run the MAKEDEV script, it creates 16 BSDstyle
 LAT device special files, and creates the LAT
              control device (/dev/streams/lat), if  it  has  not
              already  been created.  The MAKEDEV script requires
              16 contiguous LAT device special files to be available.
   (Specifying lat38 requires only 12 contiguous
 LAT device special files to be available.)

              For example, the following commands create a  total
              of 32 BSD-style LAT device special files: # cd /dev
              # MAKEDEV lat0 # MAKEDEV lat1


              Record the device  special  file  information  displayed
  by  the  MAKEDEV  script.  The special file
              names vary depending  on  the  number  of  terminal
              devices already configured.

              The  following  is  sample  output from the MAKEDEV
              command:

              MAKEDEV: special  file(s)  for  lat1:  tty16  tty17
              tty18  tty19  tty1a  tty1b  tty1c tty1d tty1e tty1f
              tty1g  tty1h  tty1i  tty1j  tty1k  tty1l  Edit  the
              /etc/inittab  file  to  include entries for the LAT
              device special files you created.  For example:

              lat620:34:respawn:/usr/sbin/getty      /dev/lat/620
              console   vt100   lat621:34:respawn:/usr/sbin/getty
              lat/621                console                vt100
              lat630:34:respawn:/usr/sbin/lattelnet  lat/630 lattelnet


              The second field (34) specifies the run  levels  at
              which the LAT devices are spawned; in this example,
              the getty process is spawned at either run level  3
              or 4. The first entry uses an absolute pathname for
              the device (/dev/lat/620).  The second uses a relative
 pathname (lat/621).

              The  previous  example  shows how to add entries to
              the /etc/inittab file for  SVR4  LAT  devices.  The
              following   example   shows  entries  for  BSD  LAT
              devices:

              lat16:34:respawn:/usr/sbin/getty   tty16    console
              vt100  lat17:34:respawn:/usr/sbin/getty  tty17 console
   vt100   lat18:34:respawn:/usr/sbin/lattelnet
              tty18 lattelnet18

              For   more  information,  see  the  inittab(4)  and
              getty(8) reference pages.  The Network  Administration:
 Connections manual provides additional information
 on SVR4 and BSD devices.  Use the  following
              command  to  spawn the processes for the LAT device
              special files that you added  to  the  /etc/inittab
              file:  #  /sbin/init  q  Create the STREAMS special
              file required by LAT by issuing the following  command:
  # /usr/sbin/strsetup -i Enable LAT automatic
              startup and shutdown by using  the  following  command:
 # /usr/sbin/rcmgr set LAT_SETUP 1

              When LAT automatic startup and shutdown is enabled,
              the /sbin/init.d/lat file automatically starts  LAT
              upon  reaching  run level 3 and automatically stops
              LAT when exiting run level 3.  Start LAT by issuing
              the following command: # /usr/sbin/latcp -s

RELATED INFORMATION    [Toc]    [Back]

       Commands:   llogin(1),   netstat(1),   getty(8),  init(8),
       latcp(8),  latsetup(8),  MAKEDEV(8),  mknod(8),  rcmgr(8),
       strsetup(8)

       Files: inittab(4)

       Introduction: lat_intro(7)

       Network Administration: Connections, System Administration



                                              lat_manual_setup(7)