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IP Setup and Network Address Translation 9-35
Follow these steps to configure IP Address Serving:
■ If you enabled IP Address Serving either by using SmartStart or in Easy Setup, DHCP, BootP clients, and
Dynamic WAN clients are automatically enabled.
■ Select Number of Client IP Addresses and enter the total number of contiguous IP addresses that the
Netopia R310 will distribute to the client machines on your local area network.
■ In the screen example shown above, a hundred Client IP addresses have been allocated.
■ Select 1st Client Address and enter the first client IP address that you will allocate to your first client
machine. For instance, on your local area network you may first want to figure out what machines are going
to be allocated specific static IP addresses so that you can determine the pool of IP addresses that you will
be serving addresses from via DHCP, BOOTP, and/or Dynamic WAN.
Note: On a Netopia R310 the factory default IP Address serving settings are:
1st Client Address: 192.168.1.3
Number of Client IP Addresses: 100
(this allows for one static address at 192.168.1.2 for the server)
■ Example: Your ISP has given your Netopia R310 the IP address 192.168.6.137, with a subnet mask of
255.255.255.248. The subnet mask allocated will give you six IP addresses to use when connecting to the
ISP over the Internet (for more information on understanding IP addressing refer to Appendix D,
“Understanding IP Addressing.”). Your address range will be from .137-.143. In this example you would
enter 192.168.6.138 as the 1st client address, as the router itself must have an IP address.
■ To enable DHCP, select Serve DHCP Clients and toggle it to Yes. DHCP serving is automatic when IP
Address Serving is enabled.
Note: When the remote router requests a DNS server address via IPCP, the Netopia R310 will supply
whatever DNS address that is either manually configured or acquired dynamically. This feature allows a
DNS to be served that was acquired via DHCP.
■ The Netopia R310 defaults to a DHCP lease time of one hour. If this is unnecessarily brief for your network
environment, you can configure the DHCP Lease Time (Hours) field. You can enter any number up to and
including 168 (one week) for the DHCP lease.
DHCP NetBIOS Options
If your network uses NetBIOS, you can enable the Netopia R310 to use DHCP to distribute NetBIOS information.
NetBIOS stands for Network Basic Input/Output System. It is a layer of software originally developed by IBM
and Sytek to link a network operating system with specific hardware. NetBIOS has been adopted as an industry
standard. It offers LAN applications, a variety of “hooks” to carry out inter-application communications and data
transfer. Essentially, NetBIOS is a way for application programs to talk to the network. To run an application that
works with NetBIOS, a non-IBM network operating system or network interface card must offer a NetBIOS
emulator. Many vendors either provide a version of NetBIOS to interface with their hardware or emulate its
transport layer communications services in their network products. A NetBIOS emulator is a program provided
by NetWare clients that allow workstations to run applications that support IBM’s NetBIOS calls.
■ Select Serve NetBIOS Options and press Return. The DHCP NetBIOS Options screen appears.