3Com 3CR16708-91 Getting Started Guide - Page 54
Solving Communication Problems, IP Addressing, How do you obtain a registered IP Address?
UPC - 662705487151
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54 CHAPTER 4: PROBLEM SOLVING Solving Communication Problems enough power subsequently becomes available the port will be powered. ■ Check that the port has not had a power limit imposed upon it. If you experience communication problems with the Switch, ensure that: ■ The Switch IP address has been configured as described in Chapter 3. ■ If the Switch is separated from your management application by a router, ensure that the default gateway IP address within the Switch is the same as the IP address of the router. ■ The Switch's IP address has been entered correctly in your network management application (such as 3Com Network Supervisor). The following is a brief overview of IP addressing, and how to obtain a registered IP address. IP Addressing To be managed correctly, each device on your network (for example a Switch or Hub) must have a unique IP address. IP addresses have the format n.n.n.n where n is a decimal number between 0 and 255. An example IP address is 192.168.100.8. The IP address is split into two parts: ■ The first part ('192.168.100' in the example) identifies the network on which the device resides ■ The second part ('.8' in the example) identifies the device within the network The natural subnet mask for this example is 255.255.255.0. If your network has a connection to the external IP network, that is, you access the Internet, you must apply for a registered IP address. How do you obtain a registered IP Address? The IP registration system ensures that every IP address used is unique; if you do not have a registered IP address, you may be using an identical address to someone else and your network will not operate correctly.