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IP Setup 10-11
Follow these steps to configure IP Address Serving:
■ If you enabled IP Address Serving, then DHCP, BootP clients and Dynamic WAN clients are automatically
enabled.
■ The IP Address Serving Mode pop-up menu allows you to choose the way in which the Netopia 4753 will
serve IP addresses. The device can act as either a DHCP Server or a DHCP Relay Agent. (See “DHCP Relay
Agent” on page 10-23 for more information.) In most cases, you will use the device to serve its own pool of
IP addresses, hence DHCP Server is the default. Address serving can also be disabled.
■ Select Number of Client IP Addresses and enter the total number of contiguous IP addresses that the
Netopia 4753 will distribute to the client machines on your local area network.
■ 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 want to first figure out which 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.
Example: Your ISP has given your Netopia 4753 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 IP addressing refer to Appendix B, “Understanding IP
Addressing.”). Your address range will be from .137-.142. In this example you would enter 192.168.6.138
as the 1st Client Address, since 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.
■ The default DHCP Lease time is one hour. This may be unnecessarily brief in your network environment.
Consequently, the DHCP lease time is now configurable. The DHCP Lease Time (Hours) setting allows you
to modify the router’s default lease time of one hour. You can enter any number up to and including 168
hours (one week) for the DHCP lease.