3Com 4226T, 4228G, 4250T manual Solving Stack, Formation, How do you obtain a registered IP Address?

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56CHAPTER 4: PROBLEM SOLVING

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.

 

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

If you are having problems with correctly forming a stack, first ensure that

Formation

Spanning Tree is enabled. If it is enabled, do the following:

Problems

 

 

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.

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Contents SuperStack 3Com Corporation 350 Campus Drive Marlborough, MA United States Government LegendContents Setting UP for Management Safety Information PIN -OUTSPage About this Guide Convention Description ConventionsIcon Description Related DocumentationAbout this Guide Introducing About the Switch FamilySwitch 4200 Family Front View DetailIntroducing the Superstack 3 Switch 4200 Series Fiber GBICs 1000BASE-T GBICsColor Indicates Port Status LEDs 10BASE-T/100BASE-TX ports Port Status LEDs Gbic portsPower/Self Test LED Color IndicatesUnit LEDs Alert LEDSystem RPS. See Connecting a Redundant Power System on Rear View DetailFeature Switch 4200 Family Automatic IP Configuration Duplex ModeRmon Alarm Quality of Service QoSInstalling the Switch Site Package ContentsChoosing a Suitable Rack-mounting Repeat steps 2 and 3 for the other side of the Switch Fitting a bracket for rack-mountingStacking Units Placing Units OnTop of Each Other Power-up Powering-upSwitch 4200 Family SequencePower/Self Test LED colors Color StateFiber cables Cross-over Cable Straight-through CableApproved Gbic The 3Com approved Gbic transceivers are TransceiversInstalling the Switch Gbic Installing the Switch Setting UP for Management Setting Up Configure IP information manually for your Switch or viewAutomatically configured IP information OverviewManual IP Configuration Automatic IP ConfigurationSetting UP for Management Manually Configuring IP Information Pre-requisitesSetting Up the Switch with IP Information Connecting the Workstation to the SwitchConfiguring the Workstation with IP Information Using Command Line Interface via Telnet Example top-level command line interface menu Connecting a workstation to the Switch via the console port Setting Up the Switch with IP Information Example top-level command line interface menu Automatically Configured IPViewing Viewing Automatically Configured IP Information Viewing IP Information via the Console Port Methods of Managing a Switch Refer to Setting Up Command Line Interface Management on Command Line Network Using TelnetInterface Management CLI Management viaChoosing a Browser Setting Up WebInterface Setting Up Snmp Management Protocol Snmp can manage a Switch ifOver the Network Management workstationDefault Users User Default Name Password Access LevelSecurity Device User Modify operation on the web interface Setting UP for Management Problem Solving For Technical Support information, see Appendix DSolving Problems Solutions belowPower LED does not light On powering-up, the Power/Self Test LED lights yellowProblems Solving Communication ProblemsSolving Hardware Snmp fan fail trap hardware failure IP AddressingHow do you obtain a registered IP Address? Solving StackFormation Solving Software Upgrade Problems Problem Solving Safety Information Important Safety Information This must be approved for the country where it is usedImportant Safety Information ’information de Sécurité Importante Schko Wichtige Sicherheitsinformationen Vorsicht Europe Appendix a Safety Information Null Modem Cable PC-AT Serial CablePin to RS-232 25-pin Pin to 9-pinModem Cable RJ-45 PinAssignments Pin Number 10/100 1000Pin Number 10/100 1000 Appendix B PIN-OUTS Switch 4226T 3C17300 Protocols Used for Administration Terminal EmulationSwitch 4250T 3C17302 Switch 4228G 3C17304 Services Register YourProduct PurchaseAccess Software TroubleshootOnline DownloadsContact Us Country Telephone Number Latin America Telephone Technical Support and Repair800 876 Appendix D Obtaining Support for Your Product Index NumbersIndex Regulatory Notices

4250T, 4226T, 4228G specifications

The 3Com 4228G, 4226T, and 4250T are professional-grade network switches designed for businesses seeking to enhance their network infrastructure. These models offer robust performance and reliability, catering to various networking needs, from small offices to large enterprise environments.

The 3Com 4228G switch is a 28-port gigabit Ethernet switch designed for high-bandwidth applications. It provides 24 Gigabit Ethernet ports with 802.3af Power over Ethernet (PoE) capability, allowing devices such as IP phones and wireless access points to be powered directly through the Ethernet cables. This feature simplifies installation and reduces additional cabling costs. The switch also supports VLAN tagging for network segmentation, improving security and performance. Its advanced traffic management lets IT administrators prioritize network traffic effectively, ensuring critical applications receive the necessary bandwidth.

On the other hand, the 3Com 4226T is a 26-port gigabit Ethernet switch, primarily designed for environments requiring a high level of connectivity without PoE. It offers similar features to the 4228G, such as VLAN support and enhanced traffic management capabilities. The 4226T is ideal for businesses that do not require power over Ethernet yet need reliable, high-speed networking capabilities. With 26 ports, this switch is an excellent choice for medium-sized enterprises looking to upgrade their network infrastructure without overwhelming their existing resources.

The 3Com 4250T is a more advanced switch, offering 48 Gigabit Ethernet ports and a robust feature set suitable for more complex networking environments. It includes Layer 2 and Layer 3 functionality, allowing for advanced routing and switching capabilities, making it highly adaptable to various network designs. The 4250T also simplifies network management through its extensive configuration options and support for IPv6. Moreover, it features an efficient cooling system and reduced power consumption, aligning with today’s growing demand for energy-efficient solutions.

All three models utilize advanced technologies such as Spanning Tree Protocol (STP) for loop prevention, QoS mechanisms to prioritize traffic, and comprehensive security features to protect the network from unauthorized access. With their different port configurations and capabilities, the 3Com 4228G, 4226T, and 4250T switches provide exceptional performance and flexibility, making them ideal for businesses aiming to enhance their networking capabilities.
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