ACC Installation and Configuration Guide

Chapter 2 51
Software Installation and Verification
Systems Without Mux Cards
Systems Without Mux C ards
The ACC Subsystem can be used with no cards installed on the local
system.Applicationprogramscanberunonthissystemandmake
requests to control ACC Mux cards that reside on remote systems
accessible via LAN. This is done by using the Remote Node Access
feature introduced in the section “High Availability Features” on page
30 of Chapter 1, and is further explained in the ACC Utilities Reference
Guide.
Loopback Configuration File
A loopback configuration file /opt/acc/cfg/loopback.answ is created
when the AC C product is installed on the system. The t tgen program is
automatically run to create the file /opt/acc/cfg/loopback.tmem.This
occurs whether or n ot there are any ACC interface cards installed in the
system. The loopback.t mem file will be adequate to bring up the ACC
Subsystem.
The section “Sample ttgen Configuration File” on page 84 of Appendix
A , “Files, Utilities, and Daemons,” shows a sample ttgen configuration
file. The file created when no ACC cards are in the system is similar, but
the Interface-Definition, Port-Definition,andTerminal-Definition
sections of the file are empty (i.e. there are no Mux, Port,orTerm entries
in the file).
Bringing Up ZCOM Mux Subsystem
Before any features of the ZCOM Mux Subsystem can be accessed, the
subsystem must be started up by running zmasterd with an appropriate
.tmem file. The /opt/acc/cfg/loopback.tmem file should be used,
followed by performing the loopback verification test:
# zmasterd cold /opt/acc/cfg/loopback.tmem
Messages indicating whether or not the ZCOM Mux subsyst em was
started successfully are logged to the file /var/opt/acc/log/XXX.tlog,
where XXX represents the day of the week (i.e. mon.tlog, tue.tlog,etc.).
The following listing is an example of what might be displayed when the
ZCOM Mux subsystem is started successfully. In this example, the
/opt/acc/cfg/loopback.answ file was created for a system with no ACC