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DES-3326S 
 Layer 3 Switch 
 
User’s Guide 
 
 
 
 
 
 
 
 
 
 
 
 
 
First Edition (June, 2001) 
651E3326S015 
Printed In Taiwan 
 
 
RECYCLABLE 
                                                                                                                                                                                                                                                                                                                                                         
                    
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                            Wichtige Sicherheitshinweise  1. Bitte lesen Sie sich diese Hinweise sorgfältig durch.  2. Heben Sie diese Anleitung für den spätern Gebrauch auf.  3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen.  Vervenden Sie keine  Flüssig- oder Aerosolreiniger.  Am besten dient ein angefeuchtetes Tuch zur Reinigung.  4. Um eine Beschädigung des Gerätes zu vermeiden sollten Sie nur Zubehörteile  verwenden, die vom Hersteller zugelassen sind.  5. Das Gerät is vor Feuchtigkeit zu schützen.  6.
                    
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                          18. Zum Netzanschluß dieses Gerätes ist eine geprüfte Leitung zu verwenden, Für einen  Nennstrom bis 6A und einem Gerätegewicht gr őßer 3kg ist eine Leitung nicht leichter  als H05VV-F, 3G, 0.75mm2  einzusetzen.                                                                                                                                                                                                                                                                                               
                    
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                          WARRANTIES EXCLUSIVE  IF THE D-LINK PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, THE  CUSTOMER'S SOLE REMEDY SHALL BE, AT D-LINK'S OPTION, REPAIR OR  REPLACEMENT. THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND  ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, EITHER IN FACT  OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. D-LINK NEITHER  ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY
                    
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                          irrespective of any earlier expiration of original warranty period.  When D-Link provides  replacement, then the defective product becomes the property of D-Link.  Warranty service may be obtained by contacting a D-Link office within the applicable  warranty period, and requesting a Return Material Authorization (RMA) number.  If a  Registration Card for the product in question has not been returned to D-Link, then a  proof of purchase (such as a copy of the dated purchase invoice) must be pro
                    
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                          error-free, and no warranty that all defects in the software product, within or without the  scope of D-Link's applicable product documentation, will be corrected.  vi                                                                                                                                                                                                                                                                                                                                           
                    
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                          D-Link Offices for Registration and Warranty Service  The product's Registration Card, provided at the back of this manual, must be sent to a  D-Link office.  To obtain an RMA number for warranty service as to a hardware product,  or to obtain warranty service as to a software product, contact the D-Link office nearest  you.  An address/telephone/fax/e-mail/Web site list of D-Link offices is provided in the  back of this manual.    Trademarks  Copyright 2001 D-Link Corporation.  Contents subj
                    
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                          FCC Warning  This equipment has been tested and found to comply with the limits  for a Class A digital device, pursuant to Part 15 of the FCC Rules.   These limits are designed to provide reasonable protection against  harmful interference when the equipment is operated in a commercial  environment.  This equipment generates, uses, and can radiate radio  frequency energy and, if not installed and used in accordance with  this user’s guide, may cause harmful interference to radio  communication
                    
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                          Table of Contents    Introduction..........................................................................13  Layer 3 Switching ...............................................................13  The Functions of a Layer 3 Switch....................................15  Features .............................................................................16  Ports ................................................................................16  Performance Features.............................
                    
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                          Switch LED Indicators ........................................................37  Stacking Module LED Indicators.........................................37  Connecting The Switch..........................................................39  Switch to End Node ............................................................39  Switch to Hub or Switch .....................................................40  Switch Stack Connections ..................................................41  10BASE-T Device
                    
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                          VLAN Layout..................................................................169  Assigning IP Network Addresses and Subnet Masks to  VLANs............................................................................170  Defining Static Routes....................................................171  Getting Started .................................................................171  Management.....................................................................171  Configuring the Switch ......
                    
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                          Identifying a Data Loop ..................................................335  Avoiding Trouble ............................................................335  Brief Review of Bitwise Logical Operations...........................342  Index...................................................................................344  xii                                                                                                                                                                       
                    
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                        DES-3326S Layer 3 Fast Ethernet Switch User’s Guide  1  INTRODUCTION  This section describes the Layer 3 functionality and Layer 2  and Layer 3 features of the DES-3326S.  Some background  information about Ethernet/Fast Ethernet, Gigabit Ethernet,  and switching technology is presented.  This is intended for  readers who may not be familiar with the concepts of layered  switching and routing but is not intended to be a complete or  in-depth discussion.  Layer 3 Switching  Layer 3 switching is t
                    
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                        DES-3326S Layer 3 Fast Ethernet Switch User’s Guide  Ethernet port to connect to a separate device, which in turn,  connects the network to a WAN or the Internet.  The DES-3326S can be thought of as 24 Fast Ethernet Layer 2  switching domains with a wire-speed router between each  domain.  It can be deployed in a network between a traditional  router and the intranetwork.  The traditional router and its  associated WAN interface would then handle routing between  the intranetwork and the WAN (th
                    
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                        DES-3326S Layer 3 Fast Ethernet Switch User’s Guide  and improve the utilization of the network’s installed  bandwidth.   The Functions of a Layer 3 Switch  Traditional routers, once the core components of large  networks, became an obstacle to the migration toward next- generation networks.  Attempts to make software-based  routers forward packets more quickly were inadequate.    A layer 3 switch does everything to a packet that a traditional  router does:  • Determines forwarding path based on
                    
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                        DES-3326S Layer 3 Fast Ethernet Switch User’s Guide  Features  The DES-3326S Switch was designed for easy installation and  high performance in an environment where traffic on the  network and the number of users increase continuously.   Switch features include:  Ports  • 24 high performance NWay ports all operating at 10/100  Mbps with Auto-MDIX function for connecting to end  stations, servers and hubs.   • All ports can auto-negotiate (NWay) between 10Mbps/  100Mbps, half-duplex or full duple
                    
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                        DES-3326S Layer 3 Fast Ethernet Switch User’s Guide  • Store and forward switching scheme.  • Full and half-duplex for both 10Mbps and 100Mbps  connections. The front-port Gigabit Ethernet module  operates at full-duplex only. Full-duplex allows the  switch port to simultaneously transmit and receive data,  and only works with connections to full-duplex capable  end stations and switches. Connections to hubs must  take place at half-duplex.  • Supports IEEE 802.3x flow control for full-duplex mo
                    
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                        DES-3326S Layer 3 Fast Ethernet Switch User’s Guide  • Data filtering rate eliminates all error packets, runts, etc.  at 148,800 pps per port at 100% of wire-speed for  100Mbps speed.  • 8K active MAC address entry table per device with  automatic learning and aging (10 to 9999 seconds).  • 8 MB packet buffer per device.  • Broadcast and Multicast storm filtering.  • Supports Port Mirroring.  • Supports Port Trunking – up to six trunk groups (each  consisting of up to eight ports) may be set up.
                    
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                        DES-3326S Layer 3 Fast Ethernet Switch User’s Guide  • Supports RIP – (Routing Information Protocol) version I  and II.  • Supports OSPF − (Open Shortest Path First)  • Supports MD5 and Password OSPF Packet  Authentication   • Supports IP version 4.  • IGMP version 1 and 2 support (RFC 1112 and RFC  2236).    • Supports PIM Dense Mode.    • Supports DVMRP.    • Supports IP multi-netting.  • Supports IP packet de-fragmentation.  • Supports 802.1D frame support.  Traffic Classification and Priorit
                    
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                        DES-3326S Layer 3 Fast Ethernet Switch User’s Guide  • SNMP v.1 Agent.  • Fully configurable either in-band or out-of-band control  via SNMP based software.  • Flash memory for software upgrades. This can be done  in-band via TFTP or out-of-band via the console.  • Built-in SNMP management:    Bridge MIB (RFC 1493)   MIB-II (RFC 1213)   Mini-RMON MIB (RFC 1757) – 4 groups   CIDR MIB (RFC 2096), except IP Forwarding Table.   802.1p MIB (RFC 2674).   RIP MIB v2 (RFC 1724).   IF MIB (RFC 2233)   Et