Avaya M770 User Manual

Chapter 17

Managing System Commands

Avaya M770 ATM Switch User’s Guide

229

A fatal system exception occurs when the CPU detects an error such as a division by 
zero, or accesses to non-existent memory. A fatal exception causes the M770 ATM 
Switch to reboot. A breakpoint is a special type of exception which is invoked by the 
M770 ATM Switch software when it detects an internal inconsistency.
To dump a list of fatal system exceptions, use the

system breaklog

 

command. 

The breaklog provides vital information for diagnosing why the M770 ATM 

Switch has crashed. This information needs to be reported to Avaya Technical Support.

To clear the list of fatal system exceptions, use the

system breaklog clear 

command. 

This command is used for a controlled shutdown of a module, any connections that 
still remain on the module will be lost. A warning to this effect is displayed and 
confirmation is requested before the module is powered down.
To carry out a controlled shutdown of the module in preparation for a power down, 
use the 

system halt

 

command. 

Command:

M15-155s8:/>system breaklog

Output:

Filename

:

lmaux.c

Line No:

553

pml_time:

1234

Abs_time:

Unknown

Stablised Count:

0

Reason:

0000b024

epc:

c005dce4

badva:

c8681734

Command:

M15-155s8:/>system breaklog clear

Command:

M15-155s8:/>system halt

Output:

This will stop the module, losing all connections - do 

you want to continue (y/n)?