52 CHAPTER 6: SETTING SNMP AND SYSTEM PARAMETERS
Working with
Nonvolatile Data
Nonvolatile data is information stored by the Layer 3 Module which is
retained even when the module is not powered on.
You can do the following tasks with nonvolatile data:
■ Create a backup copy of the module’s nonvolatile configuration.
■ Retrieve the backed-up file.
■ Reset system data to its factory-configured values, if necessary.
Nonvolatile
Parameters
During a save, the contents of nonvolatile memory are written to a disk
file. All configurable parameters are saved in nonvolatile memory,
including:
■ Module name
■ Passwords
■ IP interface configurations
■ RIP mode setting
■ SNMP community string settings
■ SNMP trap destination configurations
The file also contains the following information, which is used to resolve
any inconsistencies when nonvolatile data is restored:
■ Software version number
■ System ID
■ Date and time of creation
■ Type of configuration
■ Data checksums
Creating a Backup of
Nonvolatile Data
When the module saves nonvolatile data, it writes it to a disk file on a
host computer (that is, a server) using the Trivial File Transfer Protocol
(TFTP). You can then retrieve the information from the disk file by using
the
system nvData restore command.
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