Overview - Cisco 4215 - Intrusion Detection Sys Sensor Configuration Manual

Upgrading, Downgrading, and Installing System
Images
This chapter describes how to upgrade, downgrade, and install system images. It contains the following
sections:
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Overview

You can upgrade and downgrade the software on the sensor. Upgrading applies a service pack, signature
update, minor version, major version, or recovery partition file. Downgrading removes the last applied
upgrade from the sensor.
You cannot use the downgrade command to go from 5.0 to 4.x. To revert to 4.x, you must reimage the
Caution
sensor. You can use the downgrade command for releases after 5.0(1).
You can recover the application partition image on your sensor if it becomes unusable. Using the recover
command lets you retain your host settings while other settings revert to the factory defaults.
To install a new system image on the sensor, use the recovery /upgrade CD, ROMMON, the
bootloader/helper file, or the maintenance partition depending on which platform you have.
When you install a new system image on your sensor, all accounts are removed and the default cisco
account is reset to use the default password "cisco." After installing the system image, you must initialize
the sensor again. For the procedure, see
After you reimage and initialize your sensor, upgrade your sensor with the most recent service pack,
signature update, minor version, major version, and recovery partition file. For the procedure for locating
software on Cisco.com, see
78-16527-01
Overview, page 17-1
Upgrading the Sensor, page 17-2
Configuring Automatic Upgrades, page 17-5
Downgrading the Sensor, page 17-8
Recovering the Application Partition, page 17-9
Installing System Images, page 17-10
Obtaining Cisco IPS Software, page
Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 5.0
C H A P T E R
Initializing the Sensor, page
18-1.
17
3-2.
17-1