Upgrading the System Image
How to Upgrade the System Image
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How to Upgrade the System Image
This section provides information about performing the following tasks:
•
Saving Backup Copies of Your Old System Image and Configuration, page 3
•
Ensuring Adequate DRAM for the New System Image, page 4
•
Ensuring Adequate Flash Memory for the New System Image, page 6
•
Copying the System Image into Flash Memory, page 10
•
Loading the New System Image, page 17
•
Saving Backup Copies of Your New System Image and Configuration, page 22
Saving Backup Copies of Your Old System Image and Configuration
To avoid unexpected downtime if you encounter serious problems using your new system image or
startup configuration, we recommend that you save backup copies of your current startup configuration
file and Cisco IOS software system image file on a server.
For more detailed information, see the “Managing Configuration Files” chapter and the “Loading and
Maintaining System Images” chapter of the
Cisco IOS Configuration Fundamentals and Network
Management Configuration Guide
.
To save backup copies of the startup configuration file and the system image file, complete the following
steps.
SUMMARY STEPS
1.
enable
2.
copy
nvram:startup-config
{
ftp:
|
rcp:
|
tftp:
}
3.
dir flash:
4.
copy
flash:
{
ftp:
|
rcp:
|
tftp:
}
DETAILED STEPS
Command or Action
Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
•
Enter your password if prompted.
Step 2
copy
nvram:startup-config
{
ftp:
|
rcp:
|
tftp:
}
Example:
Router# copy nvram:startup-config ftp:
Copies the startup configuration file to a server.
•
The configuration file copy can serve as a backup copy.
•
Enter the destination URL when prompted.
