ACC Utilities Reference Guide

ZMON - ZCOM Control Program
Overview
Chapter 7170
Overview
ZMON is the program responsible for initializing and managing the
ZCOM subsystem. Its operation is closely integrated with the ZCOM
LDM (Logical Device Manager). Its primary tasks are:
• Loading the TTGEN output file into the ZCOM kernel memory.
• Sequencing the startup of the ZCOM system with the assistance of
the LDM.
• Downloading and initializing the Mux cards.
• Restarting the Mux cards after a powerfail or Mux firmware panic.
If the /var/opt/acc/dmp/ directory exists, zmon also creates a dump
file (compressed if gzip is accessible) of the ACC card memory image
and the relevant ZCOM Interface Table (IFT) for trouble-shooting.
While it is running, ZMON logs messages to the ZCOM message log to
indicate the events, its operations and errors it encountered. Refer to the
ACC Error Guide for its messages.