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56 CHAPTER 4: PROBLEM SOLVING
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.
InterNIC Registration Services is the organization responsible for
supplying registered IP addresses. The following contact information is
correct at time of publication:
World Wide Web site: http://www.internic.net
If your IP network is internal to your organization only, that is, you do not
access the Internet, you may use any arbitrary IP address as long as it is
not being used by another device on your network. 3Com suggests you
use addresses in the series 192.160.100.X (where X is a number between
1 and 254) with a subnet mask of 255.255.255.0.
These suggested IP addresses are part of a group of IP addresses that
have been set aside specially for use ‘in house’ only.
Solving Stack
Formation
Problems
If you are having problems with correctly forming a stack, first ensure that
Spanning Tree is enabled. If it is enabled, do the following:
1 Power off all units in the stack.
2 Check all the cable connections in the stack.
3 Power on all units in the stack.
Solving Software
Upgrade Problems
You can upgrade the management software of the Switch by using the
System > Control > Software Upgrade operation in the Web Interface, or
the system control softwareUpgrade command in the
command line interface. For details on these options, refer to the
Management Interface Reference Guide supplied in HTML format on the
CD-ROM that accompanies your Switch.
If you have problems with your software upgrade, refer to the Problem
Solving section in the Management Interface Reference Guide.
DUA1730-0AAA03.book Page 56 Thursday, November 17, 2005 12:17 PM