Cisco IPS 7.1 Installation Guide download pdf (Page 227)

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Cisco Intrusion Prevention System Appliance Hardware Installation Guide for IPS 7.1

OL-24002-01

Appendix C Obtaining Software

IPS Software Versioning

When you download IPS software images from Cisco.com, you should understand the versioning

scheme so that you know which files are base files, which are cumulative, and which are incremental.

This section describes the various IPS software files.

Major Update

A major update contains new functionality or an architectural change in the product. For example, the

Cisco IPS 7.1 base version includes everything (except deprecated features) since the previous major

release (the minor update features, service pack fixes, and signature updates) plus any new changes.

Major update 7.1(1) requires 5.1(6) and later. With each major update there are corresponding system

and recovery packages.

Note The 7.1(1) major update is used to upgrade 5.1(6) and later sensors to 7.1(1) If you are reinstalling 7.1(1)

on a sensor that already has 7.1(1) installed, use the system image or recovery procedures rather than the

major update.

Minor Update

A minor update is incremental to the major version. Minor updates are also base versions for service

packs. The first minor update for 7.1 is 7.2. Minor updates are released for minor enhancements to the

product. Minor updates contain all previous minor features (except deprecated features), service pack

fixes, signature updates since the last major version, and the new minor features being released. You can

install the minor updates on the previous major or minor version (and often even on earlier versions).

The minimum supported version needed to upgrade to the newest minor version is listed in the Readme

that accompanies the minor update. With each minor update there are corresponding system and

recovery packages.

Service Pack

A service packs is cumulative following a base version release (minor or major). Service packs are

released in a train release format with several new features per train. Service packs contain all service

pack fixes since the last base version (minor or major) and the new features and defect fixes being

released. Service packs require the minor version. The minimum supported version needed to upgrade

to the newest service pack is listed in the Readme that accompanies the service pack. Service packs also

include the latest engine update. For example, if service pack 7.1(3) is released, and E4 is the latest

engine level, the service pack is released as 7.1(3)E4.

Patch Release

A patch release is used to address defects that are identified in the upgrade binaries after a software

release. Rather than waiting until the next major or minor update, or service pack to address these

defects, a patch can be posted. Patches include all prior patch releases within the associated service pack

level. The patches roll into the next official major or minor update, or service pack.

Before you can install a patch release, the most recent major or minor update, or service pack must be

installed. For example, patch release 7.1(1p1) requires 7.1(1).

Note Upgrading to a newer patch does not require you to uninstall the old patch. For example, you can upgrade

from patch 7.1(1p1) to 7.1(1p2) without first uninstalling 7.1(1p1).

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