D-Link DES-3208 manual Aging Time, Spanning Tree Algorithm

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10/100 Fast Ethernet Switch User’s Guide

5.Calculation and configuration of Switched Local Area Network topology.

Aging Time

The Aging Time is a parameter that affects the auto-learn process of the Switch in terms of the network configuration. Dynamic Entries, which make up the auto-learned-node address, are aged out of the address table according to the Aging Time that you set.

The Aging Time can be from 10 seconds to 1,000,000 seconds. A very long Aging Time can result with the out-of-date Dynamic Entries that may cause incorrect packet filtering/forwarding decisions.

In the opposite case, if the Aging Time is too short, many entries may be aged out soon, resulting in a high percentage of received packets whose source addresses cannot be found in the address table.

Spanning Tree Algorithm

The Spanning Tree Algorithm (STA) in the Switch allows you to create alternative paths (with multiple switches or other types of bridges) in your network. These backup paths are idle until the Switch determines that a problem has developed in the primary paths. When a primary path is lost, the Switch providing the alternative path will automatically go into service with no operator intervention. This automatic network reconfiguration provides maximum uptime to network users. The concept of the Spanning Tree Algorithm is a complicated and complex subject and must be fully researched and understood. Please read the following before making any changes .

♦Network loop detection and prevention.

With STA, there will be only one path between any two LANs. If there is more than one path, forwarded packets will loop indefinitely. STA detects any looped path and selects the path with the lowest path

Switch Management

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Contents DES-3208 10/100 Fast Ethernet Switch User’s Guide Wichtige Sicherheitshinweise Warranties Exclusive Limited Warranty Software Trademarks Page Page Table of Contents Switch Management Switch Monitoring Page About this Guide TermsOverview of this User’s Guide Appendix C, MII Port Specifications Fast Ethernet Technology IntroductionSwitching Technology Features Performance featuresPorts Management Unpacking Unpacking SetupDesktop or Shelf Installation Setup100 Fast Ethernet Switch installed on a Desktop or Shelf Rack InstallationPower on Power Failure Front Panel Identifying External ComponentsRear panel view of the DES-3208 Rear Panel10/100 Fast Ethernet Switch User’s Guide DES-3208 Switch LED indicators LED Indicators10/100 Fast Ethernet Switch User’s Guide PC to Switch Connecting SwitchDES-3208 Switch connected to a 10BASE-T or 100Base-TX Hub Hub to SwitchHub without Uplink MDI-II port 10Base-T Hub100Base-TX Hub Switch to Switch other devices Using straight cableUsing crossover cable Using straight cable Local Console Managament Switch ManagementIP Addresses and Snmp Community Names Console port RS-232 DCETraps MIBs Packet Forwarding Spanning Tree Algorithm Aging TimeSTA Operation Levels Automatic topology re-configurationOn the Port Level User-Changeable Parameters10/100 Fast Ethernet Switch User’s Guide Illustration of STA Before Applying the STA Rules User-selective STA parameters Connecting to the Switch Using the Console InterfaceConsole Usage Conventions First Time Connecting To The Switch Steps to create a Super User or General User Super and General User PrivilegesMain Menu for General User Super User and General User Privileges Login on the Switch Console by Registered Users Choose Change Password Changing Your PasswordAdding a New User Adding and Deleting UsersDeleting a User TCP/IP Settings Setting up the SwitchUsing the Console Interface System Restart Setting Out-of-band management and console settings11. Out-of-Band/Console Setting Menu Software Updates12. Software Update Menu System Configuration MenuSnmp Trap Manager Configuration Snmp Management Settings14. Snmp Trap Manager Configuration Menu Snmp Security Community Names Snmp Manager Configuration16. Port Configuration Menu Port ConfigurationDisplaying Port Statistics Switch Monitoring17. Statistics Counters Spanning Tree Algorithm Parameters Forwarding Table 18. STA, Forwarding Table Custom Filtering Table19. Custom Filtering Table Using the Console Interface Protocol Parameters 21. Protocol Parameters Stap Port Parameters22. Stap Port Parameters Resetting the SwitchFactory Reset System Reset24. Factory Reset General Technical SpecificationsPhysical and Environmental Performance RJ-45 PIN SpecificationRJ-45 Connector pin assignment Figure C-1. The Standard MII connector MII Connector SpecificationsMII Connector Pin Assignment Table C-1. The MII standard pin assignment Index BOOTP&TFTP, 48 Tftp onlyIndex MDI-II Index Page Offices Registration Card

DES-3208 specifications

The D-Link DES-3208 is a robust and reliable Layer 2 Fast Ethernet unmanaged switch designed to enhance networking capabilities in both small and medium-sized businesses. With a compact and efficient design, the DES-3208 offers seamless connectivity for various devices, ensuring speedy data transfers and enhanced network performance.

One of the key features of the DES-3208 is its 8 Fast Ethernet (10/100 Mbps) ports, which allow for easy expansion of network infrastructure. The switch operates on a non-blocking architecture, which means it can handle multiple data streams simultaneously without compromising performance. This is particularly beneficial in environments where high traffic and data-intensive applications are commonplace.

The DES-3208 supports auto-MDI/MDIX functionality, which eliminates the need for crossover cables as the switch automatically detects the cable type connected. This feature simplifies network setup and allows for flexible configurations, enhancing usability for IT managers and system administrators.

Power-saving technologies are also a hallmark of the D-Link DES-3208. It features innovative Green Ethernet technology that reduces power consumption by detecting inactive ports and adjusting power usage accordingly. This not only contributes to environmental initiatives but also provides cost savings on energy bills over time.

Additionally, the switch supports a variety of network protocols to ensure compatibility with different network environments. These features include IEEE 802.3x flow control, which helps prevent packet loss during data transmissions, and IEEE 802.1p prioritization, ensuring critical traffic is processed in a timely manner.

The fanless design of the DES-3208 contributes to silent operation, making it an ideal choice for office environments where minimal noise is preferred. The compact form factor further allows for easy placement either on a desk or in a rack mount.

Overall, the D-Link DES-3208 is a versatile and efficient solution for businesses seeking an unmanaged switch that balances performance, energy efficiency, and ease of use. It adeptly meets the needs of growing networks while providing essential features that promote reliability and connectivity.
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