Cooper Bussmann BU-945U-E 802.11 DSSS Dhcp Server Configuration, DNS Server Configuration

Cooper Bussmann Wireless Ethernet & Device Server BU-945U-E 802.11 DSSS User Manual

3.9 DHCP Server Configuration

The BU-945U-E is able to act as a DHCP server, supplying IP addresses automatically to other DHCP Client devices. Note that the BU-945U-E units need to act in conjunction with their connected devices. If a connected device is a DHCP server, the local and remote BU-945U-E units can be configured as DHCP Clients and receive IP addresses from the server device. Similarly, if a BU-945U-E is configured as a DHCP server, it can provide IP addresses to DHCP Clients, both BU-945U-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.

3.10 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 3.8 “DHCP Server Configuration”). DNS is the system which translates internet names (such as www.cooperbussmann.com) to IP Addresses. The Cooper Bussmann BU-945U-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 naming authority. If your network is stand-alone,
	this field is set to an arbitrary name of your choice.
Device Name (Host Name)	This is the DNS name of the local device. (Commonly referred to as the host name or computer name). This
	setting is duplicated on the main Module Information configuration page. This is the name which is used to
	refer to this device. (Refer Section 3.17 “Module Information Configuration”)

3.11 Spanning Tree Algorithm / Redundancy

The bridge “Spanning Tree Protocol” function was introduced to handle network loops and provide redundant paths in networks. To enable tick the STP box on any “WDS Connections” you have configured on the “Repeaters” configuration page.

For example, consider this network with a redundant wireless link. If the bridge Spanning Tree Protocol is enabled, one of the two wireless links will be disabled - that is, all wireless data will be transferred by one link only. If the active link fails, the other link will automatically start transferring the wireless data.

3A1582Rev1.6 www.cooperbussmann.com/BussmannWirelessResources 31