Pirelli P.RG F4202N User Manual page 104

Fiber optic intergrated access device

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P.RG F4202N

A client (host) sends out a broadcast message on the LAN requesting an IP ad-

dress 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 simultane-

ously 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 ser-

vices, as it did with the original lease, allowing it to update its network configura-

tions to reflect 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 ad-

dress available for use by others.

Your gateway's DHCP server:

 Displays a list of all DHCP host devices connected to the Router

 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 config-

ured and enabled/disabled separately for each LAN device

 Can assign a static lease to a LAN PC so that it receives the same IP ad-

dress 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 Router can act as a DHCP relay, escalating DHCP responsibili-

ties to a WAN DHCP server. In this case, P.RG F4202N will act merely as a

router, while its LAN hosts will receive their IP addresses from a DHCP server

on the WAN.

With the Router's optional Zero Configuration Technology feature, the IP Auto

Detection method detects statically-defined IP addresses in addition to the

Router'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.

HBK 939800036-A1

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