Dhcp Server Parameters - AudioCodes MP-202 User Manual

A client (host) sends out a broadcast message on the LAN requesting an IP address for
itself. The DHCP server then checks its list of available addresses and leases a local IP
address to the host for a specific period of time and simultaneously designates this IP
address as `taken'. At this point the host is configured with an IP address for the duration of
the lease.
The host can choose to renew an expiring lease or let it expire. If it chooses to renew a
lease then it will also receive current information about network services, as it did with the
original lease, allowing it to update its network configurations to reject any changes that
may have occurred since it first connected to the network. If the host wishes to terminate a
lease before its expiration it can send a release message to the DHCP server, which will
then make the IP address available for use by others.
Your gateway's DHCP server:
Displays a list of all DHCP host devices connected to the gateway
Defines the range of IP addresses that can be allocated in the LAN
Defines the length of time for which dynamic IP addresses are allocated
Provides the above configurations for each LAN device and can be configured and
enabled/disabled separately for each LAN device
Can assign a static lease to a LAN PC so that it receives the same IP address each
time it connects to the network, even if this IP address is within the range of addresses
that the DHCP server may assign to other computers
Provides the DNS server with the host name and IP address of each PC that is
connected to the LAN
Additionally, the gateway can act as a DHCP relay, escalating DHCP responsibilities to a
WAN DHCP server. In this case, the gateway will act merely as a router, while its LAN
hosts will receive their IP addresses from a DHCP server on the WAN.
With the gateway's optional Zero Configuration Technology feature, the IP Auto Detection
method detects statically-defined IP addresses in addition to the gateway's DHCP clients. It
learns all the IP addresses on the LAN, and integrates the collected information with the
database of the DHCP server. This allows the DHCP server to issue valid leases, thus
avoiding conflicting IP addresses used by other computers in the network.

13.19.1 DHCP Server Parameters

To view a summary of the services currently being provided by the
DHCP server:
Click the icon 'IP Address Distribution' in the 'Advanced' screen; the 'IP Address
Distribution' screen opens.
MP-202 Telephone Adapter
Figure 13-26: DHCP Server Summary
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MP-202
LTRT-50604