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B-180 User’s Reference Guide
■ The Netopia R910 does release the DHCP address back to the available DHCP address pool precisely one
hour after the last-heard lease request as some other DHCP implementations may hold on to the lease for
an additional time after the lease expired, to act as a buffer for variances in clocks between the client and
server.
MacIP serving
Macintosh workstation (MacTCP or Open Transport):
Once the Mac workstation requests and receives a valid address, the Netopia R910 actively checks for the
workstation’s existence once every minute.
■ For a dynamic address, the Netopia R910 releases the address back to the address pool after it has lost
contact with the Mac workstation for over 2 minutes.
■ For a static address, the Netopia R910 releases the address back to the address pool after it has lost
contact with the Mac workstation for over 20 minutes.
Netopia R910 MacIP server characteristics
The Mac workstation uses ATP to both request and receive an address from the Netopia R910's MacIP server.
Once acquired, NBP confirm packets will be sent out every minute from the Netopia R910 to the Mac
workstation.
Manually distributing IP addresses
If you choose to manually distribute IP addresses, you must enter each computer’s address into its TCP/IP
stack software. Once you manually issue an address to a computer, it possesses that address until you
manually remove it. That’s why manually distributed addresses are sometimes called static addresses.
Static addresses are useful in cases when you want to make sure that a host on your network cannot have its
address taken away by the address server. Appropriate candidates for a static address include: a network
administrator’s computer, a computer dedicated to communicating with the Internet, and routers.
Using address serving
The Netopia R910 provides two ways to serve IP addresses to computers on a network. The first, Dynamic Host
Configuration Protocol (DHCP), is supported by PCs with Microsoft Windows and a TCP/IP stack. Macintosh
computers using Open Transport and computers using the UNIX operating system may also be able to use
DHCP. The second way, MacIP, is for Macintosh computers. The third way, called Serve Dynamic WAN Clients
(IPCP), is used to fulfill WAN client requirements
The Netopia R910 can use both DHCP and MacIP. Whether you use one or both depends on your particular
networking environment. If that environment includes both PCs and Macintosh computers that do not use Open
Transport, you need to use both DHCP and MacIP to distribute IP addresses to all of your computers.
Tips and rules for distributing IP addresses
■ Before you allocate IP addresses using DHCP and MacIP, consider whether you need to set aside any static