Tahoe 4681, User Manual

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Tahoe 4681 (4-port G.shdsl.bis/FastEthernet modem card)
The meaning of subsequent entries is described later in this chapter.
Basic DHCP server configuration rules
Before starting using DHCP server please read following guidelines:
the configuration is organized in a hierarchical manner – the most general group of set-
tings is a network – the physical interface of a modem. Any number of IP subnets may exist
within a network. Inside an IP subnet an IP address range may be selected – IP addresses
from that range will be dynamically assigned to the network stations. A static connection
between an IP address and a hardware address may also be set.
Each group ( network, subnet ) has its own options (name server addresses, domain names,
etc.). Creating a new group (e.g. a subnet within a network ) causes copying of the options
from the parent group (e.g. if the lan network has a domain-name option, after adding a
subnet named local within the lan the option will be automatically copied – it may be modi-
fied or deleted later)
on the beginning a network for each interface should be created
in each of the networks an IP subnet should be created according to IP subnets connected
to that interface (modem may not have the routing set up to each of them – it’s enough that
they are in the same physical network)
now IP ranges and static IP entries may be added
dhcp { on | off | relay }
DHCP/BOOTP server may work in one of three modes:
on
– the server in enabled and answers to the requests
off
– the server is disabled
relay
– the server is disabled, but the relay agent is enabled and listens for the requests to be
forwarded to other DHCP server
dhcp add
The dhcp add commands add a network, subnet, IP range, etc. Following variants are sup-
ported: