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22-12
Cisco Intrusion Prevention System CLI Sensor Configuration Guide for IPS 7.1
OL-19892-01
Chapter 22 Upgrading, Downgrading, and Installing System Images
Recovering the Application Partition
Note You cannot downgrade the sensor using the recovery partition. To downgrade to an earlier version, you
must install the appropriate system image file (.img file).
Use the downgrade command to remove the last applied signature upgrade or signature engine upgrade
from the sensor. To remove the last applied signature update or signature engine update from the sensor,
follow these steps:
Step 1 Log in to the sensor using an account with administrator privileges.
Step 2 Enter global configuration mode.
sensor# configure terminal
Step 3 If there is no recently applied service pack or signature update, the downgrade command is not
available.
sensor(config)# downgrade
No downgrade available.
sensor(config)#
Recovering the Application Partition
You can recover the application partition image for the sensor if it becomes unusable. Some network
configuration information is retained when you use this method, which lets you have network access
after the recovery is performed. Use the recover application-partition command to boot to the recovery
partition, which automatically recovers the application partition on your sensor. If you have upgraded
your recovery partition to the most recent version before you recover the application partition image,
you can install the most up-to-date software image.
Because you can execute the recover application-partition command through a Telnet or SSH
connection, we recommend using this command to recover sensors that are installed at remote locations.
Note When you reconnect to the sensor after recovery, you must log in with the default username and
password cisco.
Recovering the Application Partition Image
To recover the application partition image, follow these steps:
Step 1 Download the recovery partition image file to an FTP, HTTP, or HTTPS server that is accessible from
your sensor.
Step 2 Log in to the CLI using an account with administrator privileges.
Step 3 Enter configuration mode.
sensor# configure terminal
Step 4 Recover the application partition image.
sensor(config)# recover application-partition