9-10 Administration GuideIP Address ServingIn addition to being a router, the Netopia 4741 is also an IP address server. There are three protocols it canuse to distribute IP addresses. The first, called Dynamic Host Configuration Protocol (DHCP), is widely supported on PC networks, as wellas Apple Macintosh computers using Open Transport and computers using the UNIX operating system.Addresses assigned via DHCP are “leased” or allocated for a short period of time; if a lease is notrenewed, the address becomes available for use by another computer. DHCP also allows most of the IPparameters for a computer to be configured by the DHCP server, simplifying setup of each machine. The second, called BootP (also known as Bootstrap Protocol), is the predecessor to DHCP and allows olderIP hosts to obtain most of the information that a DHCP client would obtain. However, in contrast, BootPaddress assignments are “permanent” since there is no lease renewal mechanism in BootP. The third protocol, called Dynamic WAN, is part of the PPP/MP suite of wide area protocols used for WANconnections. It allows remote terminal adapters and NAT-enabled routers to be assigned a temporary IPaddress for the duration of their connection.Since no two hosts can use the same IP address at the same time, make sure that the addresses distributedby the Netopia 4741 and those that are manually configured are not the same. Each method of distributionmust have its own exclusive range of addresses to draw from.Go to the System Configuration screen. Select IP Address Serving and press Return. The IP Address Servingscreen will appear.MainMenuSystem IP AddressConfiguration Serving• Serve DHCP Clients• Serve BootP Clients• Serve Dynamic WAN ClientsIP Address Serving+--------------------++--------------------+IP Address Serving Mode... | Disabled || DHCP Server |Number of Client IP Addresses: | DHCP Relay Agent |1st Client Address: +--------------------+Client Default Gateway... 192.168.1.1Serve DHCP Clients: YesDHCP Lease Time (Hours): 1DHCP NetBIOS Options...Serve BOOTP Clients: YesServe Dynamic WAN Clients Yes
