Name

lta − lta pseudoterminal interface

Syntax

options LAT
pseudo-device lat
pseudo-device lta[n]

Description

The lta pseudoterminal interface provides support for local area transport (LAT) service. LAT service allows users to access remote nodes through the Ethernet.

To configure the LAT service for your machine, you must:

•Edit the system configuration file. 

•Edit the /etc/rc.local file.

•Create LAT special files. 

•Edit the /etc/ttys file.

Instructions for performing these tasks are further documented in the Guide to Ethernet Communications Servers. 

Edit the Configuration File

Edit the configuration file to include the LAT option and the lat and lta pseudo-devices. The configuration file to edit is located in /sys/conf/vax/HOSTNAME or /sys/conf/mips/HOSTNAME (depending on your processor), where HOSTNAME is the name of your host processor, in uppercase. 

The optional value for the lta pseudo-device entry defines the number of LAT lines to configure, a number between 1 and 256. If you do not specify a value, the default is 16 lines.  For example, if you want to configure 32 LAT devices into your system, the entry for the LAT lines is:

pseudo-device lta32

To use the system as a load host for remote note maintenance functions such as loading and controlling terminal servers, you must also include an options entry for DLI and a pseudo-device entry for dli in the configuration file.

Edit the /etc/rc.local File

Edit the /etc/rc.local file to restart LAT service automatically when the system reboots. Add the following entry after the commands for local daemon startup:

if [ −f /etc/lcp ]; then
     /etc/lcp −s > /dev/console & echo −n ’ lat’ >/dev/console
fi

Create LAT Special Files

Create the LAT special files by running the MAKEDEV program from the /dev directory and specifying the lta option. You create one LAT special file for each LAT device. For example, the following MAKEDEV commands create 32 device special files for LAT devices:

# cd /dev
# MAKEDEV lta0
# MAKEDEV lta1

The option range is 1 to 7.  The maximum number of LAT special files is 256. 

Edit the /etc/ttys File

Edit the /etc/ttys file to include entries for all the LAT special files you created using the MAKEDEV command. For more information on how to add these entries, see ttys(.).

Files

/dev/tty?? Contains terminal devices defined to the machine. 

/dev/ttyd? Contains terminal devices defined to the machine (modem lines only). 

See Also

ttys(5), MAKEDEV(8)
Guide to Ethernet Communications Servers