Using Address Serving; Tips And Rules For Distributing Ip Addresses - Netopia R6100 Reference Manual

Using address serving

The Netopia R6000 Series provides three 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 R6000 Series 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.
Serve dynamic WAN clients
The third method, used to fulfill WAN client requirements, is called Serve Dynamic WAN Clients. The correct
term or protocol is a subset of the PPP suite call IPCP. Originally, this would apply only to switched WAN
interface routers, and not to leased line routers. However, a new feature can give you Asynchronous PPP dial-in
support on the Auxiliary port on any router including leased line Netopia Routers.
In any situation where a device is dialing into a Netopia Router, the router may need to be configured to serve IP
via the WAN interface. This is only a requirement if the calling device has not been configured locally to know
what its address(es) are. So when a client, dialing into a Netopia Router's WAN interface, is expecting
addresses to be served by the answering router, you must set the answering Netopia Router to serve IP via its
WAN interface.
You can do this in either of two ways:
use the Serve Dynamic WAN Clients option in the Address Serving Setup screen.
Enabling Serve Dynamic WAN Clients only allows you to specify a pool of addresses from which the dial-in
client may get an IP address. It does not allow static addressing.
If you want to serve addresses dynamically, use Serve Dynamic WAN Clients.
define the address that you want to serve in the Connection Profile's IP Setup screen.
This method requires a static value to be used. Thus any user dialing in can obtain the same IP address for
every connection to the profile.
If you want to serve addresses statically, define the address in the Connection Profile.
Notes:
The addresses that are to be served cannot be used elsewhere. For example you wouldn't want to
define a static address in a Connection Profile to be served via the WAN that is already defined in the
DHCP pool of addresses.
In order to work correctly, you must define a host or node address in the IP Profile Parameters of the
Connection Profile.
This is accomplished by specifying the IP address that is to be statically served via the WAN, and then
by entering a mask value of 255.255.255.255.

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
Understanding IP Addressing B-9