Novell ZENWORKS LINUX MANAGEMENT 7.2 IR2 - ADMINISTRATION GUIDE 09-25-2008, Руководство администратора

Страница: 359 / 674

Setting Up Preboot Services 359
n
ov
do
cx (e
n)
11
Ju
ly 20
08
Š
Preboot Services daemons: The four Preboot Services daemons (novell-pbserv, novell-tftp,
novell-proxydhcp, and novell-zmgprebootpolicy) are all installed on the imaging server when
you install ZENworks Linux Management. These daemons must run together on the same
server.
Š
Imaging server: The Preboot Services daemons can be installed and run on the same or
different server than DHCP.
The following sections give general information about these services:
Š
“The DHCP Server” on page 359
Š
“The novell-pbserv daemon” on page 359
Š
“The novell-proxydhcp daemon” on page 359
Š
“The novell-tftp daemon” on page 359
Š
“The novell-zmgprebootpolicy daemon” on page 359
It is seldom necessary to make changes to the default configuration of these services. However, if
you need more detailed configuration information, see
“Configuring Preboot Services Imaging
Servers in Linux” on page 366 .
The DHCP Server
The standard DHCP server must be configured with an active scope to allocate IP addresses to the
PXE devices. The scope options should also specify the gateway or router that the PXE devices
should use.
If Preboot Services (specifically novell-proxydhcp) is installed on the same server as the DHCP
server, then the DHCP server must be configured with a special option tag. For more information,
see
“Configuring LAN Environments for Preboot Services” on page 362 .
The novell-pbserv daemon
The Preboot Services novell-pbserv daemon provides imaging services to devices.
This includes sending and receiving image files, discovering assigned Preboot bundles, acting as
session master for multicast imaging, and so on.
The novell-proxydhcp daemon
The Preboot Services Proxy DHCP server runs alongside a standard DHCP server to inform PXE
devices of the IP address of the TFTP server, the IP address of the server where novell-
zmgprebootpolicy is running, and the name of the network bootstrap program (
nvlnbp.sys
).
The novell-tftp daemon
The Preboot Services novell-tftp daemon is used by PXE devices to request files that are needed to
perform imaging tasks. The TFTP server also provides a central repository for these files.
A PXE device uses one of these servers to download the network bootstrap program
(
nvlnbp.sys
).
The novell-zmgprebootpolicy daemon
PXE devices uses novell-zmgprebootpolicy to check if there are any imaging actions that need to be
performed on the device. It forwards requests to novell-pbserv on behalf of PXE devices.