Enterasys Networks RBT-4102 Infrastructure Wireless Bridge

Network Topologies

4-5

Infrastructure Wireless Bridge

The IEEE 802.11 standard defines a Wireless Distribution System (WDS) for bridge

connections between BSS areas (access points). The access point uses WDS to forward

traffic on links between units.

The access point supports WDS bridge links on either the 5 GHz (802.11a) or 2.4GHz

(802.11b/g) bands, and can be used with various external antennas to offer flexible

deployment options. For external antenna information, refer to the RoamAbout RBT-4102

/ RBT-1602 Wireless Access Point Antenna Site Preparation and Installation Guide.

Up to six WDS bridge links can be specified for each unit in the wireless bridge network.

One unit only must be configured as the “root bridge” in the wireless network. The root

bridge should be the unit connected to the main core of the wired LAN. Other bridges

must configure one “parent” link to the root bridge or to a bridge connected to the root

bridge. The other five available WDS links can be specified as “child” links to other

bridges. This forms a tiered-star topology for the wireless bridge network.

When using WDS on a radio band, only wireless bridge units can associate to each other.

Wireless clients can only associate with the access point using a radio band set to access

point.

WirelessBridge Links

BetweenAccess Points

802.11aRadio

BridgeLink

802.11gRadio

APLink 802.11aRadio

BridgeLink

802.11gRadio

APLink

802.11gRadio

APLink

RootBridge

Bridge

802.11aRadio

BridgeLink

802.11gRadio

APLink Bridge

Bridge

Network

Core

Contents

Main Page i NOTICE ii COMPLIANCES RBT-4102, RBT-4102-BG, and RBT-4102-EU Federal Communication Commission Interference Statement IMPORTANT NOTE: FCC Radiation Exposure Statement iii Wireless 5 GHz Band Statements: Wireless 4.9 GHz Band Statement: Industry Canada - Class B RBT-4102-EU iv EC Conformance Declaration Countries of Operation & Conditions of Use in the European Community v Operation Using 5 GHz Channels in the European Community Countries of Operation & Conditions of Use in the Asia, Pacific, and Middle East Communities vi Operation Using 5 GHz Channels in the Asia, Pacific, and Middle East Community vii RBT-4102C and RBT-4102C-EU Federal Communication Commission Interference Statement IMPORTANT NOTE: FCC Radiation Exposure Statement Wireless 5 GHz Band Statements: viii RBT-4102C-EU Australia/New Zealand AS/NZS 4771 Japan Telec Approval EC Conformance Declaration ix Countries of Operation & Conditions of Use in the European Community x Operation Using 5 GHz Channels in the European Community Countries of Operation & Conditions of Use in the Asia, Pacific, and Middle East Communities xi Operation Using 5 GHz Channels in the Asia, Pacific, and Middle East Community EC-Konformittserklrung xii DECLARATION OF CONFORMITY IN LANGUAGES OF THE EUROPEAN COMMUNITY xiii xiv SAFETY COMPLIANCE Power Cord Safety Page Page xvii ENTERASYS NETWORKS, INC. FIRMWARE LICENSE AGREEMENT xviii xix xx xxi Page xxiii Table of Contents Preface xxiv xxv Preface Purpose Intended Audience Associated Documents xxvi Getting Help 1-1 Chapter 1: Introduction Introduction 1-2 Package Checklist Hardware Description Hardware Description 1-3 Rear Panel Introduction 1-4 Component Description Antennas External Antenna Connectors LED Indicators Hardware Description 1-5 Security Slot Console Port Page Page Page 2-1 Chapter 2: Hardware Installation Hardware Installation 2-2 2-3 Page 3-1 Chapter 3: Access Point Configuration Using the CLI Required Connections 3-2 Logging In Using the CLI 3-3 3-4 Using the CLI 3-5 3-6 Using Web Management 3-7 3-8 3-9 3-10 3-11 Page Page 3-14 4-1 Chapter 4: Network Configuration Network Configuration 4-2 Network Topologies Ad Hoc Wireless LAN (no Access Point) Network Topologies 4-3 Infrastructure Wireless LAN Network Configuration 4-4 Infrastructure Wireless LAN for Roaming Wireless PCs Network Topologies 4-5 Infrastructure Wireless Bridge Page A-1 Appendix A: Troubleshooting Diagnosing Access Point Indicators Page B-1 Appendix B: Cables and Pinouts Twisted-Pair Cable Assignments Cables and Pinouts B-2 10/100BASE-TX Pin Assignments Twisted-Pair Cable Assignments B-3 Straight-Through Wiring Crossover Wiring EIA/TIA568B RJ-45 Wiring Standard 10/100BASE-TXStraight-through Cable EIA/TIA568B RJ-45 Wiring Standard 10/100BASE-TXCrossover Cable Cables and Pinouts Console Port Pin Assignments Wiring Map for Serial Cable C-1 Appendix C: Specifications General Specifications Maximum Channels 802.11a 802.11b/g Modulation Type Network Configuration Operating Frequency AC Power Adapter Unit Power Supply Page C-4 Compliances Radio Signal Certification Safety Standards Sensitivity Sensitivity C-6 Transmit Power Operating Range C-7 Operating Range C-8 External Antennas External Antennas C-9 Page Index-1 Index A B C D