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Switch Memory and Configuration
Multiple Configuration Files
Changing the Startup-Config File. When the switch reboots, the startup-
config file supplies the configuration for the running-config file the switch uses
to operate. Making changes to the running-config file and then executing a
write-mem command (or, in the Menu interface, the Save command) are
written back to the startup-config file used at the last reboot. For example,
suppose that a system administrator performs the following on a switch that
has two startup-config files (workingConfig and backupConfig):
1. Reboot the switch through the Primary boot path using the startup-config
file named backupConfig.
2. Use the CLI to make configuration changes in the running-config file, and
then execute write mem.
The result is that the startup-config file used to reboot the switch is modified
by the actions in step 2.
Boot Command
Primary Boot Path
Active Startup-Config File:
backupConfig
Idle Startup-Config File:
workingConfig
Use CLI To Change Running-Config
Generated Running-Config File
Execute write mem To Save Changes to
Source Startup-Config File
Figure 6-20. Example of Reboot Process and Making Changes to the Startup-
Config File
Creating an Alternate Startup-Config File. There are two methods for
creating a new configuration file:
■ Copy an existing startup-config file to a new filename, then reboot the
switch, make the desired changes to the running-config file, then execute
write memory. (Refer to figure 6-6-20, above.)
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