Novell ZENWORKS LINUX MANAGEMENT 7.3 IR2, Руководство администратора

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Understanding Preboot Services in ZENworks Linux Management
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Understanding Preboot Services
in ZENworks Linux Management
This section provides an understanding of Novell
®
ZENworks
®
Linux Management Preboot
Services and how you can use it in your Linux network:
Š
Section 28.1, “How Do You Implement Preboot Services?,” on page 329
Š
Section 28.2, “What Is the Preboot Execution Environment (PXE)?,” on page 329
Š
Section 28.3, “Preboot Services Functionality,” on page 331
Š
Section 28.4, “The Preboot Services Processes,” on page 339
Š
Section 28.5, “Preboot Strategies,” on page 345
28.1 How Do You Implement Preboot Services?
Preboot Services utilizes the following to make its functions possible:
Š
PXE (Preboot Execution Environment): An Intel specification that allows a device to boot
from the network, instead of its hard drive or other local media. ZENworks Linux Management
can use PXE to launch Preboot Services.
Š
Preboot Services bootable CD or DVD: Used where PXE is not installed or where you want
to manually perform a Preboot Services operation.
Š
Preboot Services bootable diskette: Enables using the Preboot Services bootable CD or DVD
when the device doesn’t support booting from a CD or DVD.
Š
ZENworks partition: Enables you to set up a device for unattended imaging operations where
the device is not PXE enabled or does not have access to PXE network services.
28.2 What Is the Preboot Execution Environment
(PXE)?
The following sections provide information on using PXE in Linux Management:
Š Section 28.2.1, “Understanding How Preboot Services Uses PXE,” on page 329
Š
Section 28.2.2, “Understanding the ZENworks NBPs,” on page 330
Š Section 28.2.3, “Preparing to Use PXE,” on page 331
28.2.1 Understanding How Preboot Services Uses PXE
PXE uses DHCP (Dynamic Host Configuration Protocol) and TFTP (Trivial File Transfer Protocol)
to locate and load bootstrap programs from the network. The PXE environment is loaded from the
BIOS on the NIC.
In ZENworks Linux Management, Preboot Services uses PXE to discover if there is Preboot
Services work specified for a device and to provide the device with the files necessary to execute the
assigned work.