Appendix B IP Addresses and Subnetting
ENC User’s Guide
279
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 209
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 210
Conflicting Router IP Addresses Example
Summary of Contents for ENTERPRISE NETWORK CENTER
Page 2: ......
Page 6: ...Document Conventions ENC User s Guide 6 Server DSLAM Firewall Switch Router ...
Page 8: ...Contents Overview ENC User s Guide 8 ...
Page 15: ...15 PART I User s Guide ...
Page 16: ...16 ...
Page 46: ...Chapter 1 Web Configurator ENC User s Guide 46 ...
Page 83: ...83 PART II Technical Reference ...
Page 84: ...84 ...
Page 86: ...Chapter 3 Dashboard ENC User s Guide 86 Figure 58 Dashboard B C D E A ...
Page 92: ...Chapter 3 Dashboard ENC User s Guide 92 ...
Page 186: ...Chapter 7 Report ENC User s Guide 188 ...
Page 258: ...Chapter 9 Maintenance ENC User s Guide 262 ...
Page 266: ...Appendix A Product Specifications ENC User s Guide 270 ...
Page 286: ...Appendix C Pop up Windows JavaScript and Java Permissions ENC User s Guide 290 ...
Page 296: ...Appendix D Open Software Announcements ENC User s Guide 300 ...