SAF CFM-34-REBM Manual - page 30
Modular Fast Ethernet Bridge Management System Technical Description and Configuration Guide
V. 3.12. 1.0
·
© SAF Tehnika A/S 2003
30
General
The management module has RAM and EPROM chips onboard. When IDU is booted
up or management module CPU is restarted, bootstrap is loaded from the EPROM
into RAM. The bootstrap contains all the parameters that was previously stored in
EPROM using
write
and/or
cfg write
commands. These parameters are stored in
EPROM in the form of script and when booting up, the script parameters are loaded
into RAM. These parameters can be freely changed thus changing the contents of
RAM. If the IDU is shut down without saving the current configuration in EPROM, the
original configuration is restored from EPROM on the next boot-up.
Here is an example of script:
SAF>cfg show
01: ip remaddr 192.168.0.11
02: ip seraddr 192.168.0.10
03: Chan 144
04: snmp community read safpub
05: snmp trap 255.255.255.255
06: route add 62.85.14.0 MASK 255.255.255.0 192.168.12.22
The script can be edited, e.g., strings can be added by simply entering the required
command (the script will be supplemented with the new string or the instant string
entry will be updated) and deleted using “
cfg delete
changes of parameters can be saved in EPROM using
cfg write
command line.
To end Telnet/ASCII session press Ctrl+D.
The management software has a system up-time, system down-time and frame
error timers built in. The down-time counter counts the seconds when the
Signal
Lost
alarm is on whereas the up-time counter returns the system up-time (in
seconds); the frame error counter counts false frames received from the WAN. All
counters are resetted using
clear counters
command from Telnet/ASCII terminal or
from IDU, - selecting “Reset Counters” in the setup mode.
The management module has a watchdog timer (WDT) built in which manages the
automatic restart of the management system if it freezes. Besides the
restartCPU
command the management system can by resetted using
restartWDT
command
which breaks off check words to WDT thus causing the management system to
restart. The watchdog timer can be turned off using
disableWDT
command (from
Telnet/ASCII terminal) and can be turned on only by restarting the MUX and
management module using hidden reset button or unplugging power.
Radio parameters
The radio parameter values (transmit frequency and power) are stored internally in
Flash memory of the Radio unit, the Radio operates exactly with those values stored
in its Flash memory. When the radio parameter is modified during the equipment is
in operation, the corresponding radio parameter value in the Radio Flash memory is
overwritten with the new one and applied in operation. Also, each time the
equipment is booted, the radio parameter values written in the IDU bootstrap are
uploaded to the Radio and the previously stored radio parameter values in Flash
memory are overwritten with those in the IDU bootstrap. Hence the radio parameter
configuration in the IDU bootstrap has a higher priority as they will override the
values stored in the Radio on the equipment restart.
Consequently, the radio parameter configuration could be stored in the IDU
bootstrap for the purpose to be able to quickly change the Radio unit later. Normally
it is not necessary for the IDU bootstrap to contain strings that configure radio
parameters.