User`s guide

VoiceFinder AP2120 VoIP Gateway User’s Guide Version 1.00
AddPac Technology Co., Ltd. -
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4.8. DHCP (Dynamic Host Configuration Protocol)
Configuration
Dynamic Host Configuration Protocol (DHCP) automatically allocates IP
addresses to DHCP clients.
The DHCP function of VoiceFinder AP2120 Gateway uses the address pool
configured for the Gateway to allocate IP addresses to DHCP clients and
manage IP addresses.
If software of VoiceFinder AP2120 Gateway cannot 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 configured by the network manager.
The following figure shows the basic procedure that the DHCP client requests an
IP address to the DHCP server.
PassFinder
AP1501 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,
Information