System information

Operation 1-33
Software Release 2.0.1
C613-03018-00 REV A
The script contains the following line:
MAIL TO=[e-mail] SUBJECT=”WARNING: Load high”
MESSAGE=”CPU utilisation exceeded 80%”
Note that it is not necessary to identify the router in either the Subject field
or the message as the mail system automatically inserts the router’s host
name in the From field of the message header.
2. Create a trigger to activate the script.
Enable the trigger module and create a trigger to activate the script when
the router’s CPU utilisation rises above 80%:
ENABLE TRIGGER
CREATE TRIGGER=1 CPU=80 DIRECTION=UP SCRIPT=mailcpu.scp
SHOW TRIGGER=1
Software Releases and Patches
Prior to Software Release 6.8, system code resided in a set of Erasable
Programmable Read Only Memories (EPROMs). At router startup the system
code was copied to RAM to allow code patches to be made. Patches could be
loaded in to nonvolatile storage (NVS) which would overlay the system code
in RAM.
From Software Release 6.8, software releases can be stored in FLASH and
loaded into RAM from FLASH without changing EPROMs. Patches can be
stored in and loaded from either NVS or FLASH. The router will boot from any
designated software release in FLASH, or as a last resort, from the software
release in EPROM.
From Software Release 7.2, software releases and patches are also available as
compressed release files. A compressed release file is substantially smaller than
the equivalent standard release file, requires less FLASH memory to store, and
can be downloaded to the router in less time. The disadvantage is that the
router startup process takes longer (5–25 seconds) when booting from a
compressed release.
From Software Release 7.6.0, software releases have a new numbering scheme.
A release is now identified by a number of the format
<major>.<minor>.<interim>. The release whose interim release number is "0" is
known as the "base release". For example, Software Release 7.6.0 is the base
release of 7.6, Software Release 7.6.1 is the first interim release of 7.6.
Releases
A software release contains a copy of the system software that executes on the
router. Releases are given numbers that look like “7.6.0”. In this case the major
release number is “7”, the minor release number is “6” and the interim release
number is “0”. A release can be stored either in EPROM or in FLASH. Releases
can not be stored in NVS because the amount of NVS available in the router is
not large enough to hold an entire release.
A standard release is a single file with a name of the form:
mm-rrr.REL