Cisco IPS-4255-K9 Installation Guide - Page 225

Chapter 11 Obtaining Software IPS Software Versioning Signature Engine Update A signature engine update is an xecutable file containing binary code to support new signature updates. Signature engine files require a specific service pack, which is also identified by the req designator. Figure 11-3 illustrates what each part of the IPS software file represents for signature engine updates. Figure 11-3 IPS Software File Name for Signature Engine Updates IPS-[engine]-[E]-req-x.y-z.pkg Product line designator Package type Signature engine level Software version requirement designator Required software version File extension 191861 Recovery and System Image Files Recovery and system image files contain separate versions for the installer and the underlying application. The installer version contains a major and minor version field. The major version is incremented by one of any major changes to the image installer, for example, switching from .tar to rpm or changing kernels. The minor version can be incremented by any one of the following: • Minor change to the installer, for example, a user prompt added. • Repackages require the installer minor version to be incremented by one if the image file must be repackaged to address a defect or problem with the installer. Figure 11-4 illustrates what each part of the IPS software file represents for recovery and system image files. Figure 11-4 IPS Software File Name for Recovery and System Image Files Product line/platform designator Strong crypto designator Package type Installer major version Installer minor version Application version designator Application version File extension IPS-K9-[mfq,sys,r,]-x.y-a-*.img or pkg 191015 OL-18504-01 Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.0 11-5