3Com Switch 4200G Configuration Guide

37
FILE SYSTEM MANAGEMENT
File Attribute
Configuration
Introduction to File
Attributes
An app file, a configuration file, or a Web file can be of one of these three attributes:
main, backup and none, as described in Table 280.
An app file is an executable file, with .app as the extension. A configuration file is
used to store and restore configuration, with cfg as the extension. A Web file is used
for Web-based network management, with web as the extension. If clustering is
configured, there will also be a file called topology.top.
A file can have both the main and backup attributes. Files of this kind are labeled as
*b.
If a newly created file is configured to be of the main attribute, the existing file in the
Flash that is of the same attribute and the same type loses its attribute. This ensures
that there can be only one app file, one configuration file and one Web file with the
main attribute in the Flash. It is the same with the files in the Flash that are of the
backup attribute.
File operations and file attribute operations are independent of each other. For
example, if you delete a file with the main attribute from the Flash, the main attribute
is not deleted. It becomes the attribute of a valid file that is later downloaded to the
Flash and has same name as the previously deleted one.
The file attributes are compatible with that of the previous versions. After the
BootROM of a switch is upgraded, the previous default app startup file will have the
main attribute.
Configuring File
Attributes
You can configure and view the main attribute and backup attribute of the files used
for the next startup of a switch, and switch the main and backup attribute of the files.
Table 280 Descriptions on file attributes
Attribute
name
Description Feature Identifier
main The main attribute identifies main
startup files. The main startup file
is used first for a switch to
startup.
In the Flash, there can be only
one app file, one configuration
file and one Web file with main
attribute.
(*)
backup The backup attribute identifies
backup startup files. The backup
startup file is used after a switch
fails to startup using the main
startup file.
In the Flash, there can be only
one app file, one configuration
file and one Web file with the
backup attribute.
(b)
none Files that are neither of main
attribute nor backup attribute are
of none attribute.
None