Novell ZENWORKS LINUX MANAGEMENT 7.2 IR2 - ADMINISTRATION GUIDE 09-25-2008 Administration Manual page 361

LAN Configuration Differences Between the Same and Separate Servers
Table 29-3
Information On the Same Server
Configuration Because Preboot Services and DHCP are
running on the same server, option tag 60
must be set on the DHCP server.
For information on setting this tag, see
"Configuring LAN Environments for
Preboot Services" on page
Advantages Easy installation and setup.
No network configuration is
required.
Disadvantages DHCP server configuration is
required (option tag 60).
Limited use, because a single-LAN
environment only exists in small lab-
type networks.
The following illustrates the differences for a WAN/VLAN configuration between installing Preboot
Services on the same server as DHCP, or on a separate server. In this case, all PXE devices over the
entire WAN/VLAN connect to the Preboot Services imaging server.
WAN/VLAN Configuration Differences Between the Same and Separate Servers
Table 29-4
Information On the Same Server
Configuration The routers/switches have been
configured with IP helpers to forward
network traffic to the DHCP server.
Because Preboot Services and DHCP are
running on the same server, option tag 60
is set on the DHCP server.
For information on setting this tag, see
"Configuring a WAN/VLAN with Preboot
Services and DHCP Running on the
Same Server" on page
Advantages No network equipment (routers/
switches) needs to be configured to
forward network traffic to the TFTP
server.
On Separate Servers
None required.
362.
Easiest installation and setup.
No network configuration is
required.
No DHCP server configuration is
required.
Limited use, because a single-LAN
environment only exists in small lab-
type networks.
On Separate Servers
A DHCP relay agent or IP helper is
configured on the router/switch serving
the subnet that the PXE device belongs
to. The helper is configured to forward all
DHCP broadcasts that are detected in the
subnet to the DHCP and Proxy DHCP
servers.
This normally requires two helpers to be
configured: the first to forward DHCP
broadcasts to the DHCP server, and the
362.
second to forward the DHCP broadcasts
to the Proxy DHCP server.
Common network setup.
Multiple Preboot Services imaging
servers can be installed so that each
server provides service only for
certain subnets.
Setting Up Preboot Services 361