Netopia R5300 - Manual (Page 246)

B-8 User’s Reference Guide
global limits on the size of the address ser ving database, which is shared by all address ser ving functions
active in the router.
■ The Netopia R5000 Series Router releases the DHCP address back to the available DHCP address pool
exactly one hour after the last-heard lease request. Some other DHCP implementations may retain the
lease for an additional time after the lease expired. This is intended to act as a buffer for variances in
clocks between the client and ser ver.
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Macintosh workstation (MacTCP or Open Transpor t):
Once the Mac workstation requests and receives a valid address, the Netopia R5000 Series Router actively
checks for the workstation’s existence once ever y minute.
■ For a dynamic address, the Netopia R5000 Series Router 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 R5000 Series Router releases the address back to the address pool after
it has lost contact with the Mac workstation for over 20 minutes.
Netopia R5000 Series Router MacIP server characteristics
The Mac workstation uses ATP to both request and receive an address from the Netopia R5000 Series Router's
MacIP ser ver. Once acquired, Name Binding Protocol (NBP) confirm packets will be sent out ever y minute from
the Netopia R5000 Series Router to the Mac workstation.
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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 ser ver. Appropriate candidates for a static address include: a network
administrator’s computer, a computer dedicated to communicating with the Internet, and routers.
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The Netopia R5000 Series Router provides three ways to ser ve IP addresses to computers on a network. The
first, Dynamic Host Configuration Protocol (DHCP), is suppor ted by PCs with Microsoft Windows and a TCP/IP
stack. Macintosh computers using Open Transpor t 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 Ser ve Dynamic
WAN Clients (IPCP), is used to fulfill WAN client requirements
The Netopia R5000 Series Router can use both DHCP and MacIP. Whether you use one or both depends on
your par ticular networking environment. If that environment includes both PCs and Macintosh computers that
do not use Open Transpor t, you need to use both DHCP and MacIP to distribute IP addresses to all of your
computers.