D-Link DES-3224 manual Advantages of Cut-Through, Disadvantages of Cut-Through

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10/100 Auto Negotiation Switch User’s Guide

byte packets are delayed by 1200 microseconds in a Store and Forward device versus 60 microseconds in a Cut-Through device.

Store and Forward requires more memory because the DES-3224 must store the packet before sending it out.

Advantages of Cut-Through

Cut-Through is faster because the packet is sent as soon as the first 128 bytes are received.

Cut-Through requires less memory since the DES-3224 only reads the address but does not store the entire message.

Disadvantages of Cut-Through

Bad packets are perpetuated, taking up bandwidth.

The benefits diminish in high traffic networks.

Cut-Through can not be used on networks that use both Ethernet and Fast Ethernet. The network must use one or the other.

Follow these steps to change the default setting from Store and Forward to Cut-Through:

1.Toggle the space bar to change the setting.

2.Select Save and press Enter.

Managing the DES-3224

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Contents DES-3224 10/100 Auto Negotiation Switch User’s Guide Link Limited Warranty Hardware North, Central, and South America FCC Warning Wichtige Sicherheitshinweise Page Table of Contents Page Page Page About This Guide AudienceOrganization Features IntroductionFront Panel MDI-Uplink port MDI-X ports Side PanelsTelnet Management Rear PanelManagement Methods Local Console ManagementUpdating Firmware Installing the DES-3224 Installation OptionsUnpacking the DES-3224 Power On Desktop/ Shelf InstallationRack Installation Cable Specifications Connecting the DES-3224 to the NetworkCable Diagram Cable Requirements RS-232 Port PortsMDI-II Port MDI-X PortDES-3224 to DES-3224 Connection Connecting the DES-3224 to the DES-5024 and HubsLEDs Power LEDDES-3224 LED Panel Speed/ Link/ Activity LEDFull/ Half LED Utilization LEDs Local Console Management Managing the DES-3224∙ Parity None ∙ Stop bits ∙ Flow Control None TelnetLog ∙ Default User Name D-Link ∙ Default Password D-LinkHelp Message Help MessageSpacebar Console Program System ConfigurationSwitch Port 1-8, 9-16, 17-24 Configuration Spanning Tree ConfigurationTrunking Port Management System Configuration MenuSnmp Management Configuration Vlan Port ManagementSystem Information System ResetFactory Reset to Default Config Values Software UpdateSoftware Version Boot Prom Firmware VersionSystem Information Menu Hardware RevisionSystem Location LAN Default GatewaySystem Description System NameSystem Reset System ResetFactory Reset Factory ResetFactory Reset Confirmation System Rate Control Advantages of Store and ForwardDisadvantages of Store and Forward Disadvantages of Cut-Through Advantages of Cut-ThroughSoftware Update Software Update MenuSoftware Update Transfer Message Displayed as Eeprom is Being Written User Account Management User Account Change MenuCreate New User User Name PasswordConfirm Password Access LevelStatus Delete UsersDelete Change Password Old PasswordNew Password Switch Port Configuration Switch Port Configuration MenuState Physical Port StatePriority Spanning Tree Configuration Spanning Tree Configuration MenuSTA Operation Levels Root Cost Forward Delay TimeSpanning Tree Algorithm Bridge PriorityRoot Port Root BridgeSnmp Management Configuration Menu Snmp Management ConfigurationSnmp Manager Setting Access RightSnmp Community String Link Change Event Snmp Trap Manager SettingAuthentication Failure Cold StartPage Vlan Port Management Menu Vlan Port ManagementVlan Port Management menu TrunkGroup Create/ View VlanNew Vlan Name Port #Vlan Name Delete Vlan MenuVirtual LAN Name Modify Vlan MenuVlan Modify menu Trunking Port Management menu Trunking Port Management MenuCreate New Trunking Port New Trunking Group NameName Trunking Port Delete Trunking PortTrunking Port Name Modify Trunking PortTrunking Port Modify menu Problem Solution TroubleshootingPower LED is Off System Error LED Indicators DES-3224 Technical Specifications Switch SpecificationsPort Specifications General EMI Index Access LevelUser Name 34, 35