Chapter 2: Network Integration and Example
The DHCPatriot system can replace any existing DHCP server that you may have in
your network. It can force authentication of customer equipment using either the Built-in
Authentication server or an external RADIUS server. The system may optionally
interact with an external RADIUS server.
Device Placement
The DHCPatriot system is designed to be placed in the server farm in the core of your
network. It supports centrally serving customers in your network. Placement at the
core is not strictly required, however. Figure 2.1 shows placement in a typical network.
An example of usage follows. This example will help in the decision regarding
placement in your network.
Authenticated DHCP Installation Example
In figure 2.1, the optional RADIUS server and console
server are shown. Using the example in figure 2.1,
we can construct a proper setup for the DHCPatriot
system. This will help you understand how the
DHCPatriot will integrate into your network.
This example network consists of a simple border,
server farm and customer network that consists of
Ethernet based DSL. For the purposes of this
example, we will assume that the DSLAM is providing
only bridging services, not routing. On the Cisco®
7200, the Ethernet from the DSLAM terminates on
fastethernet 0/1 and the Ethernet link from the
Cisco® 3548 to the Cisco® 7200 terminates on
fastethernet 0/0 on the Cisco® 7200. VLAN 3 exists
between the Cisco® 3548 and the Cisco® 7200. VLAN 2 exists between the Cisco®
3548 and the server farm which contains the DHCPatriot system, the optional RADIUS
server and the optional console server. VLAN 1 exists between the Cisco® 3548 and
the Cisco® 7500 border router.
To better understand how the system functions, it is necessary to describe it from the
perspective of a new customer device on the network.
Since this is a new device, the MAC Address is unknown to the DHCPatriot system.
The system will force the device to be authenticated before being allowed on to the
network (optional). The customer turns the device on. It is configured for DHCP and
therefore requests an IP Address. The Cisco® 7200 router, acting as a DHCP Relay
Chapter 2: Network Integration and Example
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DHCPatriot Version 6 Operations Manual This document © 2017 First Network Group Inc. All Rights Reserved
Figure 2.1
Summary of Contents for DHCPatriot Version 6
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