Weidmuller WI-MOD-945-E: 900Mhz Wireless Ethernet & Device Server v2.16 - Manual (Page 65)

Weidmuller Wireless Ethernet Modem & Device Server WI-MOD-945-E User Manual
Page 65 www.weidmuller.com Rev 2.136
3.19 - DHCP Client Configuration
DHCP (Dynamic Host Configuration Protocol) allows DHCP Clients to automatically obtain their IP Address at start-up.
This simplifies network administration, as there is no need to manually configure each device with a separate IP Address.
The WI-MOD-945-E is able to act as a DHCP client. To set the WI-MOD-945-E to acquire its IP address from a DHCP
Server, check
the box “Obtain IP Address Automatically” on the Network Configuration page.
When configured as a DHCP Client the “Device Name” on the Module Information page will be the module identifier (as
the IP address will be unknown) and so should be given a unique name.
3.20 - DHCP Server Configuration
The WI-MOD-945-E is able to act as a DHCP server, supplying IP addresses automatically to other DHCP Client devices.
Note that the WI-MOD-945-E units need to act in conjunction with their connected devices. If a connected device is a
DHCP server, the local and remote WI-MOD-945-E units can be configured as DHCP Clients and receive IP addresses
from the server device. Similarly, if a WI-MOD-945-E is configured as a DHCP server, it can provide IP addresses to
DHCP Clients, both WI-MOD-945-E units as well as other connected devices. Configuration items for the DHCP Server
are listed below.
Enabled Tick this box to enable the DHCP Server
IP Range Minimum
/ Maximum The DHCP Server will assign IP addresses to DHCP Clients from within this range
of addresses.
Gateway / Primary
DNS / Secondary
DNS These Settings are common to all of the DHCP Clients, and refer to the gateway
address, and Domain Name Service (DNS) Configuration
Lease Time This is the number of seconds the client is granted the assigned IP address. The
client should renew its lease within this time.
3.21 - DNS Server Configuration
DNS (Domain Name Service) allows devices to be given human-readable names in additions to their IP address. This
makes identification of devices (hosts) simpler, and makes it possible to identify devices which have been automatically
assigned their IP address by a DHCP server (See section 3.20 -
“DHCP Server Configuration”. DNS is the system which
translates internet names (such as www.weidmuller.com) to IP Addresses. The WEIDMULLER WI-MOD-945-E can act as
a DNS Server for a local network. Name to IP address mapping are automatically updated by the built in DHCP server
when it issues an IP address to a client unit.
For the DNS Server configuration to be effective, Each DNS Client must be configured with the address of this DNS
server, as either the primary or secondary DNS (secondary DNS is only used if there is no response from the primary
DNS). Normally, this is done by setting the primary DNS field of the DHCP server configuration to the wireless IP address.
This address is then provided to client units to use as their primary DNS server address when the DHCP server issues an
IP address. The DNS Server is configured using the following settings.
Enabled Tick this box to enable the DNS Server
Domain Name This is a common suffix applied to the name of each device in the network. If your
network is part of a larger network, this would be assigned to you by the relevant
IP Netmask Sets the IP Netmask
Save Changes Save changes to non-volatile memory (Reset is required to activate)
Save Changes and
Reset Save to non-volatile memory and restart to activate changes