System information

1-24 AR Series Router Reference Manual
Software Release 2.0.1
C613-03018-00 REV A
Nonvolatile Storage (NVS)
The nonvolatile storage (NVS) module provides a facility to store information
so that it is not destroyed when the router is reset or powered off. The type of
information that may be stored in the NVS are module configuration tables,
interface configurations, patches and script files.
The NVS is organised as blocks of contiguous memory of varying size. A block
ID and an index uniquely identifies each block and an owner ID indicates
which module created the block. NVS blocks are normally maintained by the
modules that created them, but this can also be done manually.
The command:
SHOW NVS
displays information about each block in the NVS including ID, index, owner,
size, and creation date. The command:
SHOW NVS FREE
displays the amount of free space in the NVS and the size of the largest block
that can be created.
Blocks can be created using the command:
SET NVS CREATE
and deleted using the command:
SET NVS DELETE
All blocks can be deleted using the command:
SET NVS CLEAR_TOTALLY
Data in the NVS blocks can be displayed using the command:
SHOW NVS DUMP
and modified using the command:
SET NVS MODIFY
The router’s file subsystem provides a file-based interface to NVS memory,
allowing NVS to be used to store scripts and other files.
FLASH Memory
FLASH memory is a nonvolatile, reusable memory device that allows large
volumes of data (up to 8MB) to be stored in the router. The primary function of
FLASH memory in the router is to store multiple software releases, simplifying
the servicing and maintenance requirements of the router. Releases can be
remotely loaded into FLASH memory from any router port using the Loader
Module. Multiple software releases can be loaded and then individually
selected for use at runtime by the Install Module. Comprehensive management
features are provided to examine the state of the FLASH memory and to view
or modify the contents.
To enable FLASH memory to support applications other than just software
releases it is structured like a disk subsystem with files which can be created,