Software Upgrade By Installing Hotfixes; Hotfix Overview; Basic Concepts In Hotfix - H3C SR6600 Fundamentals Configuration Manual

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Software Upgrade by Installing Hotfixes

This chapter includes these sections:

Hotfix Overview

Hotfix Configuration Task List
One-Step Patch Installation
Step-by-Step Patch Installation
Step-by-Step Patch Uninstallation
Displaying and Maintaining Hotfix
Hotfix Configuration Examples
Hotfix Overview
Hotfix is a fast, cost-effective method to repair software defects of a device. Compared with another
method, software version upgrade, hotfix can upgrade the software without interrupting the running
services of the device. In other words, it can repair the software defects of the current version without
rebooting the device.

Basic Concepts in Hotfix

Patch and patch file
A patch, also called patch unit, is a package to fix software defects. Generally, patches are released as
patch files. A patch file may contain one or more patches for different defects. After loaded from the
storage medium to the memory patch area, each patch is assigned a unique number, which starts from
1, for identification, management and operation. For example, if a patch file has three patch units, they
are numbered as 1, 2, and 3 respectively.
Incremental patch
An incremental patch means that the patch is dependent on the previous patch units. For example, if a
patch file has three patch units, patch 3 can be running only after patch 1 and 2 take effect. You cannot
run patch 3 separately.
The currently released patches are all incremental patches.
Common patch and temporary patch
Common patches are those formally released through the version release flow.
Temporary patches are those not formally released through the version release flow, but
temporarily provided to solve the emergent problems.
The common patches always include the functions of the previous temporary patches so as to replace
them. The patch type affects the patch loading process only; the system deletes all the temporary
patches before it loads the common patch.
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