PassFinder AP2520 VoIP Router/Gateway Operation Manual
Version 1.10 / Mar. 2002
AddPac Technology Co., Ltd.
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4.9.
DHCP(Dynamic Host Configuration Protocol)
Configuration
Dynamic Host Configuration Protocol (DHCP) automatically allocates IP
addresses to DHCP clients.
The DHCP function of the PassFinder AP2520 Gateway uses the address pool
that has been set in the Gateway to allocate IP addresses to DHCP clients and
manage IP addresses.
If software of the PassFinder AP2520 Gateway does not respond to the request
of DHCP through the database that is set in the Gateway, the Gateway will
send the request to another DHCP server that the network manager has set.
The following figure shows the basic procedure that the DHCP client requests
an IP address to the DHCP server.
VoiceFinder
AP1100 Router
AddPac
DHCP Server
Host A
DHCPACK (unicast)
DHCPREQUEST (broadcast)
DHCPOFFER (unicast)
DHCPDISCOVER (broadcast)
IBM RS/6000
Router
Host A (a client) sends a broadcast message “DHCPDISCOVER” to the DHCP
server of the Gateway. Then, the DHCP server sends the DHSCPOFFER Unicast
message that contains configuration information – IP address to be allocated,
domain name and allocation status of the IP address – to the client. The
Information
