Specifications

VoiceFinder VoIP Gateway Configuration Guide (APOS 2.0) Release Version 3.1
AddPac Technology Co., LTD
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2.8. Configuring DHCP (Dynamic Host Configuration
Protocol)
DHCP (Dynamic Host Configuration Protocol) is a protocol which allocates IP address to
DHCP Client automatically.
The DHCP feature of VoiceFinder has a role of allocating and manging IP addresses for DHCP
Client by using address pool. If the VoiceFinder Gateway fails to respond to DHCP request, the
gateway is able to forward this request to the other DHCP server.
The following picture basically shows the process of which DHCP Client requesting IP address
from DHCP server
VoiceFinder
AP1100 Router
AddPac
DHCP Server
Host A
DHCPACK (unicast)
DHCPREQUEST (broadcast)
DHCPOFFER (unicast)
DHCPDISCOVER (broadcast)
IBM RS/6000
Router
Figure 2.1 Communication between DHCP Server and Host A
Host A as a client sends a broadcast message which is named as DHCPDISCOVER to DHCP
server. Then DHCP server returns DHSCPOFFER unicast message with the configuration
details including IP address, MAC address, domain name, verification of the configuration
details. DHCP server confirms the IP address which has been allocated to the client already by
retiring DHCPACK unicast message.
Information