D-Link DES-3216 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-3216 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-3216 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-3216

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Contents DES-3216 10/100 Auto Negotiation Switch User’s Guide Link Limited Warranty Hardware North, Central, and South America FCC Warning Wichtige Sicherheitshinweise Table of Contents Page Page Organization About This GuideAudience Introduction FeaturesRear Panel Front PanelTelnet Management Management MethodsUpdating Firmware Local Console ManagementDesktop/ Shelf Installation Installing the DES-3216Installation Options Rack Installation Power OnCable Specifications Connecting the DES-3216 to the NetworkCable Diagram MDI-X Port Connecting the DES-3216 to the DES-5024 and HubsPorts DES-3216 to DES-3216 ConnectionLEDs LQNDES-3216 LED Panel Power LEDLED Local Console Management Managing the DES-3216∙ Data bits ∙ Parity None ∙ Stop bits ∙ Flow Control None TelnetLog ∙ Default User Name D-Link ∙ Default Password D-LinkHelp Message Help MessageSpacebar Panel ConventionsConsole Program System ConfigurationSwitch Port 1-8, 9-16 Configuration Spanning Tree ConfigurationTrunking Port Management Snmp Management ConfigurationVlan Port Management System Information System Configuration MenuSystem Reset Factory Reset to Default Config ValuesHardware Revision Software UpdateBoot Prom Firmware Version System Information MenuSystem Description LAN Default GatewaySoftware Version MAC AddressSystem Reset System ResetFactory Reset Factory ResetFactory Reset Confirmation Disadvantages of Store and Forward System Rate ControlAdvantages of Store and Forward Disadvantages of Cut-Through Advantages of Cut-ThroughSoftware Update Software Update MenuSoftware Update Transfer File Transfer through Xmodem Create New User User Account ManagementUser Account Change Menu User Name PasswordConfirm Password Access LevelDelete Delete UsersStatus Change Password Change PasswordNew Password Old PasswordSwitch Port Configuration Physical Switch Port Configuration MenuState Priority Port StateSpanning Tree Algorithm Spanning Tree ConfigurationSpanning Tree Configuration Menu STA Operation LevelsHello Time Forward Delay TimeBridge Priority Root CostUser Selective STA parameters Root PortSnmp Management Configuration Menu Snmp Management ConfigurationSnmp Community String Snmp Manager SettingAccess Right Link Change Event Snmp Trap Manager SettingAuthentication Failure Cold StartPage Vlan Port Management Menu Vlan Port ManagementVlan Port Management menu TrunkGroup Create New VlanNew Vlan Name Port #Vlan Name Delete Vlan MenuVirtual LAN Name Modify Vlan MenuTrunking Port Management menu Trunking Port Management MenuName Create New Trunking PortNew Trunking Group Name Trunking Port Delete Trunking PortTrunking Port Name Modify Trunking PortProblem Solution TroubleshootingPage Port Specifications Appendix a DES-3216 Technical SpecificationsSwitch Specifications 10/100 Auto Negotiation Switch Users’ Guide General EMI 10/100 Auto Negotiation Switch Users’ Guide Performance Index Access LevelUser Name 32, 33