C-12 Netopia ISDN Router Reference GuideThe example follows these rules:n An IP address must not be used as a static address if it is alsoin a range of addresses being distributed by DHCP or MacIP.n A single IP address range is used by all the address-servedclients. These include DHCP, BOOTP, MacIP, and WAN clients,even though BOOTP and static MacIP clients might not beconsidered served.n The address range specified for address-served clients cannotwrap around from the end of the total available range back tothe beginning. See below for a further explanation and anexample.n The network address issued by an ISP cannot be used as ahost address.A DHCP exampleSuppose, for example, that your ISP gave your network the IPaddress 199.1.1.32, and a 4-bit subnet mask. Address 199.1.1.32is reserved as the network address. Address 199.1.1.47 isreserved as the broadcast address. This leaves 14 addresses toallocate, from 199.1.1.33 through 199.1.1.46. If you want toallocate a sub-block of 10 addresses using DHCP, enter “10” in theDHCP Setup screen’s Number of Addresses to Allocate item. Then,in the same screen’s First Address item, enter the first address inthe sub-block to allocate such that all 10 addresses are within youroriginal block. You could enter 199.1.1.33, or 199.1.1.37, or anyaddress between them. Note that if you entered 199.1.1.42 as thefirst address, network routing errors would probably result becauseyou would be using a range with addresses that do not belong toyour network (199.1.1.49, 199.1.1.50, and 199.1.1.51).Nested IP subnetsUnder certain situations, you may wish to create remote subnetsfrom the limited number of IP addresses issued by your ISP or otherauthority. You can do this using connection profiles. These subnets
