3Com 3C172203, 3C17204 manual Solving Communication Problems, IP Addressing

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48CHAPTER 4: PROBLEM SOLVING

Solving

Communication

Problems

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.

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Contents SuperStack 3C17203 3C172043Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Setting UP for Management Setting Up Command Line Interface ManagementSwitch Port Online Technical Services World Wide Web SitePIN -OUTS Null Modem Cable PC-AT Serial Cable RJ-45 Pin AssignmentsPage About this Guide Conventions List conventions that are used throughout this guideText Conventions Icon DescriptionRelated DocumentationProduct Registration DocumentationComments Pddtechpubscomments@3com.comIntroducing Hardware Features Switch Hardware featuresSoftware features Four groups supported Statistics, History, AlarmsEvent Switch Front View DetailColor Indicates Port Status LEDs Module Packet LEDsModule Status LEDs Power/Self Test LED Color IndicatesUnit LEDs To your Switch. Contact your supplier for more information Switch 4400 Rear Switch 4400 rear viewView Detail Default Settings shows the default settings for the Switch Installing the Switch Package Contents Rack-mounting Placing Units On Top of Each OtherStacking Units Power-up Powering-upSwitch SequencePower/Self Test LED colors Color StateCross-over Cable Straight-through Cable Installing the Switch Setting UP for Management Setting Up IP ConfigurationManual IP Configuration OverviewAutomatic IP Configuration Initial Switch Setup Methods Manual Setup Automatic SetupManual Setup Connecting the Workstation to the SwitchPanel Port Pre-requisitesConfiguring the Workstation with IP Information Setting Up the Switch with IP InformationConnecting a workstation to the Switch via the console port Setting Up the Switch with IP Information Manual Setup Documentation supplied with the terminal emulation software Automatic Setup Example top-level command line interface menu Viewing IP Information via the Console PortRefer to Setting Up Command Line Interface Management on CLI management via the console portRefer to Setting Up Web Interface Management on Refer to Setting Up Snmp Management onCommand Line Network Using TelnetInterface Management CLI Management viaSetting Up Web InterfaceChoosing a Browser Over the NetworkSetting Up Snmp Management Protocol Snmp can manage a Switch ifManagement workstation Documentation supplied with the Snmp network managementYou can change the default passwords using either User Default Access Level Name PasswordSecurity Device User Modify operation on the web interface 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 HardwareUnit LED is flashing green An Snmp fan fail trap is receivedSolving Communication Problems IP AddressingHow do you obtain a registered IP Address? Problem Solving Safety Information Important Safety Information This must be approved for the country where it is used’information de Sécurité Importante Schko Wichtige Sicherheitsinformationen Vorsicht Europe PC-AT Serial Cable Null Modem Cable 9-pin to RS-232 25-pinPin to 9-pin Connectors Modem CableRJ-45 Pin AssignmentsPin Number Signal Function Appendix B PIN-OUTS Switch 4400 24-port Switch 4400 24-port Technical SpecificationsProtocols Used for Administration Standards SupportedTerminal Emulation Switch 4400 48-port Switch 4400 48-port Technical SpecificationsAppendix C Technical Specifications Services Online TechnicalUsername anonymous Asia, Pacific Rim Europe and South AfricaCountry Telephone Number Fax Number NET 3Com 408 326 800 638 Not toll-free Enterprise Customers Appendix D Technical Support Index NumbersUnit information label Regulatory Notices

3C17204, 3C172203 specifications

The 3Com 3C172203 and 3C17204 are part of the 3Com series of networking products that have made significant contributions to local area networks (LANs) and enterprise connectivity. While they may not be as widely recognized today as newer technologies, their features, technologies, and characteristics played an essential role in enhancing network performance and reliability during their peak usage.

One of the defining features of the 3Com 3C172203 and 3C17204 is their support for Ethernet networking, which was pivotal in establishing fast and reliable communication between devices on a network. These products typically supported both 10Base-T and 100Base-TX standards, providing a flexible transition from older networks to faster Ethernet speeds. This backward compatibility ensured that organizations could upgrade their networks incrementally without needing a complete overhaul, thereby preserving their existing investments in infrastructure.

Both models also supported features designed to optimize network performance and provide enhanced management capabilities. For instance, built-in diagnostic features enabled network administrators to troubleshoot connection issues more effectively, thereby reducing downtime. Additionally, these devices incorporated intelligent switching capabilities that could manage data flow efficiently, prioritizing traffic and optimizing available bandwidth to ensure a smooth user experience, even under heavy load.

In terms of physical design, the 3C172203 and 3C17204 were built with a focus on durability. These units often featured robust metal enclosures suitable for various environments, from office spaces to more demanding industrial settings. Furthermore, their compact design allowed for easy integration into existing network setups without requiring significant rack space, making them an attractive option for enterprises looking to maximize their networking capabilities.

Security features were also a consideration in the design of these networking devices. They implemented basic security protocols to safeguard the integrity of data transmitted across the network, ensuring that unauthorized access was minimized and overall network security was enhanced.

In conclusion, the 3Com 3C172203 and 3C17204 represent an era of networking technology characterized by their support for Ethernet standards, intelligent switching capabilities, robust design, and essential management features. These products were integral in facilitating the growth of LANs and laid the groundwork for the advanced networking solutions that followed in the years ahead. While newer technologies have emerged since then, the fundamental principles established by devices like the 3C172203 and 3C17204 continue to influence contemporary networking designs.
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