DES-3225G Series 24-Port Fast Ethernet Switch User's Guide Sixth Edition (December 2001) 651S3225G065 Printed In Taiwan RECYCLABLE Table of Contents INTRODUCTION ...............................................................................................................................................................................................1 FAST ETHERNET TECHNOLOGY ................................................................................................................................................................... 1 GIGABIT ETHERNET TECHNOLOGY ............................................................................................................................................................. 1 SWITCHING TECHNOLOGY ............................................................................................................................................................................ 2 FEATURES......................................................................................................................................................................................................... 2 Ports...............................................................................................................................................................................................................2 Performance features ..................................................................................................................................................................................3 Management .................................................................................................................................................................................................3 UNPACKING AND SETUP ...............................................................................................................................................................................4 UNPACKING...................................................................................................................................................................................................... 4 INSTALLATION ................................................................................................................................................................................................ 4 Desktop or Shelf Installation ....................................................................................................................................................................4 Rack Installation .........................................................................................................................................................................................5 POWER ON ........................................................................................................................................................................................................ 6 Power Failure ..............................................................................................................................................................................................6 IDENTIFYING EXTERNAL COMPONENTS................................................................................................................................................7 FRONT PANEL.................................................................................................................................................................................................. 7 REAR PANEL..................................................................................................................................................................................................... 7 SIDE PANELS.................................................................................................................................................................................................... 8 OPTIONAL PLUG-IN MODULES..................................................................................................................................................................... 8 100BASE-TX Module..................................................................................................................................................................................9 100BASE-FX (SC) Fiber Module .............................................................................................................................................................9 100BASE-FX (MT-RJ) Fiber Module ......................................................................................................................................................9 1000BASE-SX Gigabit Module...............................................................................................................................................................10 1000BASE-LX Gigabit Module...............................................................................................................................................................10 1000BASE-T Copper Gigabit Module...................................................................................................................................................11 LED INDICATORS........................................................................................................................................................................................... 11 CONNECTING THE SWITCH.......................................................................................................................................................................12 SWITCH TO END NODE ................................................................................................................................................................................ 12 SWITCH TO HUB OR SWITCH...................................................................................................................................................................... 12 10BASE-T Device.......................................................................................................................................................................................13 100BASE-TX Device..................................................................................................................................................................................13 SWITCH MANAGEMENT CONCEPTS ......................................................................................................................................................14 LOCAL CONSOLE MANAGEMENT ............................................................................................................................................................... 14 Diagnostic (console) port (RS-232 DCE) ............................................................................................................................................14 IP ADDRESSES AND SNMP COMMUNITY NAMES.................................................................................................................................... 15 TRAPS.............................................................................................................................................................................................................. 15 MIBS................................................................................................................................................................................................................ 16 PACKET FORWARDING................................................................................................................................................................................. 16 Aging Time ..................................................................................................................................................................................................16 Filtering Database....................................................................................................................................................................................17 SPANNING TREE ALGORITHM .................................................................................................................................................................... 17 STA Operation Levels ...............................................................................................................................................................................17 On the Bridge Level................................................................................................................................................................................ 18 On the Port Level.................................................................................................................................................................................... 18 User-Changeable STA Parameters.........................................................................................................................................................18 Illustration of STA .....................................................................................................................................................................................19 PORT TRUNKING............................................................................................................................................................................................ 20 VLANS AND BROADCAST DOMAINS.......................................................................................................................................................... 21 MAC-based Broadcast Domains.............................................................................................................................................................22 802.1Q VLANs............................................................................................................................................................................................22 802.1Q VLAN Segmentation ................................................................................................................................................................. 22 Sharing Resources Across 802.1Q VLANs ........................................................................................................................................ 23 802.1Q VLANs Spanning Multiple Switches ...................................................................................................................................... 23 Port-based VLANs .....................................................................................................................................................................................25 BROADCAST STORMS.................................................................................................................................................................................... 25 Segmenting Broadcast Domains.............................................................................................................................................................26 Eliminating Broadcast Storms................................................................................................................................................................26 USING THE CONSOLE INTERFACE...........................................................................................................................................................27 SETTING UP A CONSOLE............................................................................................................................................................................. 27 CONNECTING TO THE SWITCH USING TELNET....................................................................................................................................... 28 CONSOLE USAGE CONVENTIONS................................................................................................................................................................. 28 FIRST TIME CONNECTING TO THE SWITCH............................................................................................................................................. 28 User Accounts Management....................................................................................................................................................................30 Saving Changes .........................................................................................................................................................................................30 LOGGING ONTO THE SWITCH CONSOLE BY REGISTERED USERS................................................................ ...