ELSA Lancom DSL/10 Office, Руководство пользователя

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Operating modes and functions
ELSA LANCOM DSL/10 Office
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Automatic address administration with DHCP
In order to operate smoothly in a TCP/IP network, all the devices in a local network must
have unique IP addresses.
In a smaller network, it is still conceivable that these addresses could be entered
manually in all the computers in the network. In a larger network with many workstation
computers, however, this would simply be too enormous of a task.
In such situations, the DHCP (Dynamic Host Configuration Protocol) is the ideal solution.
Using this protocol, a DHCP server in a TCP/IP-based LAN can dynamically assign the
necessary addresses to the individual stations.
The DHCP server
As a DHCP server, the ELSA LANCOM DSL/10 Office can administer the IP addresses in
its TCP/IP network. In doing so, it passes the following parameters to the workstation
computers:
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IP address
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Network mask
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Broadcast address
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DNS server
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NBNS server
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Default gateway
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Period of validity for the parameters assigned
DHCP—'on', 'off' or 'auto'?
The DHCP server can be set to three different states:
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'on': The DHCP server is permanently active. The configuration of the server (validity
of the address pool) is checked when this value is entered.
– When correctly configured, the device will be available to the network as a
DHCP server.
– In the event of an incorrect configuration (e.g. invalid pool limits), the
DHCP server is disabled and switches to the 'off' state.
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'off': The DHCP server is permanently disabled.
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'auto': The server is in automode. In this mode, after switching it on, the device
looks for other DHCP server within the local network.
– The device then disables its own DHCP server if any other DHCP servers are
found. This prevents the unconfigured device from assigning addresses not in
the local network when switched on.