ZyXEL P-661H Series Manual de usuario descargar pdf (Pagina 321)

Appendix C IP Addresses and Subnetting

P-661H/HW Series User’s Guide

321

IP Address Conflicts

Each device on a network must have a unique IP address. Devices with duplicate IP addresses

on the same network will not be able to access the Internet or other resources. The devices may

also be unreachable through the network.

Conflicting Computer IP Addresses Example

More than one device can not use the same IP address. In the following example computer A

has a static (or fixed) IP address that is the same as the IP address that a DHCP server assigns

to computer B which is a DHCP client. Neither can access the Internet. This problem can be

solved by assigning a different static IP address to computer A or setting computer A to obtain

an IP address automatically.

Figure 210 Conflicting Computer IP Addresses Example

Conflicting Router IP Addresses Example

Since a router connects different networks, it must have interfaces using different network

numbers. For example, if a router is set between a LAN and the Internet (WAN), the router’s

LAN and WAN addresses must be on different subnets. In the following example, the LAN

and WAN are on the same subnet. The LAN computers cannot access the Internet because the

router cannot route between networks.

Figure 211 Conflicting Computer IP Addresses Example

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ZyXEL P-661H Series Manual de usuario Pagina 321