Symbol Technologies AP-5131 User Manual

AP-5131 Access Point

Product Reference Guide

AP-5131 Access Point

Product Reference Guide

72E-94168-01

Revision A

November 2006

© 2006 by Symbol Technologies, Inc. All rights reserved.

No part of this publication may be reproduced or used in any form, or by any electrical or mechanical means,
without permission in writing from Symbol. This includes electronic or mechanical means, such as
photocopying, recording, or information storage and retrieval systems. The material in this manual is subject to
change without notice.

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Contents

About This Guide

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Document Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Notational Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viii

Service Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viii

Chapter 1. AP-5131 Introduction

New AP-5131 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Mesh Networking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Additional LAN Subnet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

On-board Radius Server Authentication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Hotspot Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Routing Information Protocol (RIP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Manual Date and Time Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Feature Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

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AP-5131 Access Point Product Reference Guide

Single or Dual Mode Radio Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Separate LAN and WAN Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Multiple Mounting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Antenna Support for 2.4 GHz and 5.2 GHz Radios . . . . . . . . . . . . . . . . . . . . . . 1-7

Sixteen Configurable WLANs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Support for 4 BSSIDs per Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Quality of Service (QoS) Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Industry Leading Data Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Kerberos Authentication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

EAP Authentication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

WEP Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

KeyGuard Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Wi-Fi Protected Access (WPA) Using TKIP Encryption . . . . . . . . . . . . . 1-12

WPA2-CCMP (802.11i) Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Firewall Security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

VPN Tunnels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Content Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

VLAN Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Multiple Management Accessibility Options. . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Updatable Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Programmable SNMP v1/v2/v3 Trap Support . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Power-over-Ethernet Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

MU-MU Transmission Disallow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Voice Prioritization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Support for CAM and PSP MUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Statistical Displays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Transmit Power Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

Advanced Event Logging Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

Configuration File Import/Export Functionality . . . . . . . . . . . . . . . . . . . . . . . 1-17

Default Configuration Restoration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

DHCP Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

Multi-Function LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

Theory of Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

Cellular Coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

MAC Layer Bridging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Media Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

Direct-Sequence Spread Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

MU Association Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Management Access Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Chapter 2. Hardware Installation

Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Available Product Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Placement of the AP-5131 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Site Surveys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Antenna Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Power Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Symbol Power Injector System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Installing the Power Injector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Preparing for Site Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Cabling the Power Injector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Power Injector LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Mounting the AP-5131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Desk Mounted Installations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Wall Mounted Installations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Suspended Ceiling T-Bar Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-15

Above the Ceiling (Plenum) Installations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

Setting Up MUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

v

Chapter 3. Getting Started

Installing the AP-5131 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Default Configuration Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Initially Connecting to the Access Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Connecting to the Access Point using the WAN Port . . . . . . . . . . . . . . . . . . . .3-3

Connecting to the Access Point using the LAN Port . . . . . . . . . . . . . . . . . . . . .3-4

Basic Device Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Configuring Device Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Configuring WLAN Security Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

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Testing Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Where to Go from Here? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Chapter 4. System Configuration

Configuring System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Configuring Data Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Managing Certificate Authority (CA) Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Importing a CA Certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Creating Self Certificates for Accessing the VPN . . . . . . . . . . . . . . . . . . . . . 4-10

Creating a Certificate for Onboard Radius Authentication . . . . . . . . . . . . . . 4-13

Configuring SNMP Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

Configuring SNMP Access Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

Enabling SNMP Traps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25

Configuring Specific SNMP Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28

Configuring SNMP RF Trap Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30

Configuring Network Time Protocol (NTP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32

Logging Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35

Importing/Exporting Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37

Updating Device Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41

Upgrade/Downgrade Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46

Chapter 5. Network Management

Configuring the LAN Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Configuring VLAN Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Configuring LAN1 and LAN2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Configuring Advanced DHCP Server Settings . . . . . . . . . . . . . . . . . . . . 5-11

Setting the Type Filter Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

Configuring WAN Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

Configuring Network Address Translation (NAT) Settings . . . . . . . . . . . . . . 5-19

Configuring Port Forwarding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21

Enabling Wireless LANs (WLANs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22

Creating/Editing Individual WLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24

Configuring WLAN Security Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-29

Configuring a WLAN Access Control List (ACL). . . . . . . . . . . . . . . . . . . 5-31

Setting the WLAN Quality of Service (QoS) Policy . . . . . . . . . . . . . . . . 5-34

Configuring WLAN Hotspot Support . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-40

Setting the WLAN’s Radio Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-45

Configuring the 802.11a or 802.11b/g Radio . . . . . . . . . . . . . . . . . . . . .5-48

Configuring Bandwidth Management Settings. . . . . . . . . . . . . . . . . . . . . . . . 5-55

Configuring Router Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-57

Setting the RIP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-59

Chapter 6. Configuring Access Point Security

Configuring Security Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Setting Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Resetting the AP-5131 Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Enabling Authentication and Encryption Schemes . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

Configuring Kerberos Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

Configuring 802.1x EAP Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

Configuring WEP Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

Configuring KeyGuard Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18

Configuring WPA Using TKIP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

Configuring WPA2-CCMP (802.11i) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22

Configuring Firewall Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

Configuring LAN to WAN Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

Available Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31

Configuring Advanced Subnet Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32

Configuring VPN Tunnels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34

Configuring Manual Key Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-38

Configuring Auto Key Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-42

Configuring IKE Key Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-44

Viewing VPN Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-48

Configuring Content Filtering Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-50

Configuring Rogue AP Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-53

Moving Rogue APs to the Allowed AP List . . . . . . . . . . . . . . . . . . . . . . . . . . .6-56

Displaying Rogue AP Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-58

Using MUs to Detect Rogue Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-60

Configuring User Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-62

Configuring the Radius Server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-62

Configuring LDAP Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-65

Configuring a Proxy Radius Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-67

Managing the Local User Database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-69

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Mapping Users to Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-71

Defining the User Access Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-72

Chapter 7. Monitoring Statistics

Viewing WAN Statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Viewing LAN Statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

Viewing a LAN’s STP Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

Viewing Wireless Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

Viewing WLAN Statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13

Viewing Radio Statistics Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17

Viewing Radio Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18

Retry Histogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22

Viewing MU Statistics Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23

Viewing MU Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25

Pinging Individual MUs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27

MU Authentication Statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28

Viewing the Mesh Statistics Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29

Viewing Known Access Point Statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-30

Chapter 8. Command Line Interface Reference

Connecting to the CLI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Accessing the CLI through the Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Accessing the CLI via Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Admin and Common Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

Network Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11

Network LAN Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12

Network LAN, Bridge Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16

Network LAN, WLAN-Mapping Commands . . . . . . . . . . . . . . . . . . . . . 8-19

Network LAN, DHCP Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-28

Network Type Filter Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-34

Network WAN Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-39

Network WAN NAT Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-42

Network WAN, VPN Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-48

Network Wireless Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-57

Network WLAN Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-58

Network Security Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-71

Network ACL Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-80

Network Radio Configuration Commands. . . . . . . . . . . . . . . . . . . . . . . . 8-85

Network Quality of Service (QoS) Commands. . . . . . . . . . . . . . . . . . . . 8-102

Network Bandwith Management Commands. . . . . . . . . . . . . . . . . . . . 8-107

Network Rogue-AP Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-110

Network Firewall Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-120

Network Router Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-125

System Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-131

System Debug and Last Password Commands . . . . . . . . . . . . . . . . . . . . . . .8-135

System Access Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-136

System Certificate Management Commands . . . . . . . . . . . . . . . . . . . . . . . . 8-139

System SNMP Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-152

System SNMP Access Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-153

System SNMP Traps Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-158

System Network Time Protocol (NTP) Commands . . . . . . . . . . . . . . . . . . . .8-164

System Log Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-169

System Configuration-Update Commands . . . . . . . . . . . . . . . . . . . . . . . . . .8-175

Firmware Update Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-182

Statistics Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-186

ix

Chapter 9. Configuring Mesh Networking

Mesh Networking Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

The AP-5131 Client Bridge Association Process . . . . . . . . . . . . . . . . . . . . . . . . 9-3

Spanning Tree Protocol (STP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-4

Defining the Mesh Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-4

Mesh Networking and the AP-5131’s Two Subnets . . . . . . . . . . . . . . . . . . . . . 9-5

Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-5

Impact of Importing/Exporting Configurations to a Mesh Network . . . . . . . . . 9-5

Configuring Mesh Networking Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

Setting the LAN Configuration for Mesh Networking Support. . . . . . . . . . . . . 9-6

Configuring a WLAN for Mesh Networking Support . . . . . . . . . . . . . . . . . . . .9-8

Configuring the AP-5131 Radio for Mesh Networking Support . . . . . . . . . . . 9-12

Usage Scenario - Trion Enterprises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-18

Trion’s Initial Deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-18

Adding 2 Client Bridges to Expand the Coverage Area. . . . . . . . . . . . . . . . . . 9-29

Adding 2 More Client Bridges to the Trion Network. . . . . . . . . . . . . . . . . . . . 9-36

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AP-5131 Access Point Product Reference Guide

Appendix A. Technical Specifications

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Radio Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Antenna Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

2.4 GHz Antenna Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

5.2 GHz Antenna Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Additional Antenna Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Antenna Accessory Connectors, Cable Type and Length. . . . . . . . . . . . . . . . . A-5

Country Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Appendix B. AP-5131 Usage Scenarios

Configuring Automatic Updates using a DHCP or Linux BootP Server

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Windows - DHCP Server Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Embedded Options - Using Option 43 . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Global Options - Using Extended/Standard Options . . . . . . . . . . . . . . . . B-4

DHCP Priorities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5

Linux - BootP Server Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6

BootP Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7

BootP Priorities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-9

Configuring an IPSEC Tunnel and VPN FAQs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-9

Configuring a VPN Tunnel Between Two AP-5131s . . . . . . . . . . . . . . . . . . . B-10

Configuring a Cisco VPN Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-13

Frequently Asked VPN Questions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-14

Replacing an AP-4131 with an AP-5131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-19

Appendix C. Customer Support

About This Guide

Introduction

This guide provides configuration and setup information for the AP-5131 model access point.

Document Conventions

The following document conventions are used in this document:

NOTE Indicate tips or special requirements.

CAUTION Indicates conditions that can cause equipment damage or data loss.

!

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AP-5131 Access Point Product Reference Guide

WARNING! Indicates a condition or procedure that could result in personal injury or

equipment damage.

Notational Conventions

The following notational conventions are used in this document:

• Italics are used to highlight specific items in the general text, and to identify chapters and
sections in this and related documents.

• Bullets (•) indicate:

• action items

• lists of alternatives

• lists of required steps that are not necessarily sequential

• Sequential lists (those describing step-by-step procedures) appear as numbered lists.

Service Information

If a problem is encountered with the AP-5131, contact the Symbol Customer Support. Refer to

Appendix C for contact information. Before calling, have the model number and serial number at hand.

If the problem cannot be solved over the phone, you may need to return your equipment for servicing.
If that is necessary, you will be given specific instructions.

Symbol Technologies is not responsible for any damages incurred during shipment if the
approved shipping container is not used. Shipping the units improperly can possibly void
the warranty. If the original shipping container was not kept, contact Symbol to have
another sent to you.

AP-5131 Introduction

The Symbol AP-5131 Access Point (AP) provides a bridge between Ethernet wired LANs or WANs and
wireless networks. It provides connectivity between Ethernet wired networks and radio-equipped
mobile units (MUs). MUs include the full line of Symbol terminals, bar-code scanners, adapters (PC
cards, Compact Flash cards and PCI adapters) and other devices.

The AP-5131 provides a maximum 54Mbps data transfer rate via each radio. It monitors Ethernet
traffic and forwards appropriate Ethernet messages to MUs over the network. It also monitors MU
radio traffic and forwards MU packets to the Ethernet LAN.

The AP-5131 is available in two models:

• A single-radio version (Part No. AP-5131-4002X-WW), that can be configured as either an

802.11a access point or an 802.11b/g access point.

• A dual-radio version (Part No. AP-5131-1304X-WW), allowing both the 802.11a radio and

the 802.11b/g radio to function simultaneously.

If you are new to using an access point for managing your network, refer to Theory of Operations on

page 1-18 for an overview on wireless networking fundamentals.

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AP-5131 Access Point Product Reference Guide

1.1 New AP-5131 Features

With this most recent 1.1 release of the AP-5131 firmware, the following new features have been
introduced to the existing AP-5131 feature set:

• Mesh Networking

• Additional LAN Subnet

• On-board Radius Server Authentication

• Hotspot Support

• Routing Information Protocol (RIP)

• Manual Date and Time Settings

1.1.1 Mesh Networking

Utilize the AP-5131’s new mesh networking functionality to allow the AP-5131 to function as a bridge
to connect two Ethernet networks or as a repeater to extend your network’s coverage area without
additional cabling. The AP-5131 mesh networking functionality is configurable in two modes. It can
be set in a wireless client bridge mode and/or a wireless base bridge mode (which accepts
connections from client bridges). These two modes are not mutually exclusive.

In client bridge mode, the AP-5131 scans to find other access points using the selected WLAN’s
ESSID. The AP-5131 must go through the association and authentication process to establish a
wireless connection. The mesh networking association process is identical to the AP-5131’s MU
association process. Once the association/authentication process is complete, the wireless client
adds the connection as a port on its bridge module. This causes the AP-5131 (in client bridge mode)
to begin forwarding configuration packets to the base bridge. An AP-5131 in base bridge mode allows
the AP-5131 radio to accept client bridge connections.

The two bridges communicate using the Spanning Tree Protocol (STP). The spanning tree determines
the path to the root and detects if the current connection is part of a network loop with another
connection. Once the spanning tree converges, both access points begin learning which destinations
reside on which side of the network. This allows them to forward traffic intelligently.

After the AP-5131 (in client bridge mode) establishes at least one wireless connection, it will begin
beaconing and accepting wireless connections (if configured to support mobile users). If the AP-5131
is configured as both a client bridge and a base bridge, it begins accepting client bridge connections.
In this way, the mesh network builds itself over time and distance.

AP-5131 Introduction

Once the AP-5131 (in client bridge mode) establishes at least one wireless connection, it establishes
other wireless connections in the background as they become available. In this way, the AP-5131 is
able to establish simultaneous redundant links. An AP-5131 (in client bridge mode) can establish up
to 3 simultaneous wireless connections with other AP-5131s. A client bridge always initiates the
connections and the base bridge is always the acceptor of the mesh network data proliferating the
network.

Since each AP-5131 can establish up to 3 simultaneous wireless connections, some of these
connections may be redundant. In that case, the STP algorithm establishes which links are the
redundant links and disables the links from forwarding.

For an overview on mesh networking as well as details on configuring the AP-5131’s mesh networking
functionality, see Configuring Mesh Networking on page 9-1.

1.1.2 Additional LAN Subnet

In a typical retail or small office environment (wherein a wireless network is available along with a
production WLAN) it is frequently necessary to segment a LAN into two subnets. Consequently, a
second LAN is necessary to “segregate” wireless traffic.

The AP-5131 now has a second LAN subnet enabling administrators to segment the AP-5131’s LAN
connection into two separate networks. The main AP-5131 LAN screen now allows the user to select
either LAN1 or LAN2 as the active LAN over the AP-5131’s Ethernet port. Both LANs can still be active
at any given time, but only one can transmit over the AP-5131 physical LAN connection. Each LAN
has a separate configuration screen (called LAN 1 and LAN 2 by default) accessible under the main
LAN screen. The user can rename each LAN as necessary. Additionally, each LAN can have its own
Ethernet Type Filter configuration, and subnet access (HTTP, SSH, SNMP and telnet) configuration.

1-3

For detailed information on configuring the AP-5131 for additional LAN subnet support, see

Configuring the LAN Interface on page 5-1.

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AP-5131 Access Point Product Reference Guide

1.1.3 On-board Radius Server Authentication

The AP-5131 now has the ability to work as a Radius Server to provide user database information and
user authentication. Several new screens have been added to the AP-5131’s menu tree to configure
Radius server authentication and configure the local user database and access policies. A new Radius
Server screen allows an administrator to define the data source, authentication type and associate
digital certificates with the authentication scheme. The LDAP screen allows the administrator to
configure an external LDAP Server for use with the AP-5131. A new Access Policy screen enables the
administrator to set WLAN access based on user groups defined within the User Database screen.
Each user is authorized based on the access policies applicable to that user. Access policies allow an
administrator to control access to a user groups based on the WLAN configurations.

For detailed information on configuring the AP-5131 for AAA Radius Server support, see Configuring

User Authentication on page 6-62.

1.1.4 Hotspot Support

The AP-5131 now allows hotspot operators to provide user authentication and accounting without a
special client application. The AP-5131 uses a traditional Internet browser as a secure authentication
device. Rather than rely on built-in 802.11security features to control AP-5131 association privileges,
you can configure a WLAN with no WEP (an open network). The AP-5131 issues an IP address to the
user using a DHCP server, authenticates the user and grants the user to access the Internet.

If a tourist visits a public hotspot and wants to browse a Web page, they boot their laptop and
associate with a local Wi-Fi network by entering a valid SSID. They start a browser, and the hotspot’s
access controller forces the un-authenticated user to a Welcome page (from the hotspot operator)
that allows the user to login with a username and password. In order to send a redirected page (a
login page), a TCP termination exists locally on the AP-5131. Once the login page displays, the user
enters their credentials. The AP-5131 connects to the Radius server and determines the identity of
the connected wireless user. Thus, allowing the user to access the Internet once successfully
authenticated.

For detailed information on configuring the AP-5131 for Hotspot support, see Configuring WLAN

Hotspot Support on page 5-40.

AP-5131 Introduction

1.1.5 Routing Information Protocol (RIP)

With the release of the 1.1 version AP-5131, Routing Information Protocol (RIP) functionality has been
added to the AP-5131’s existing Router screen. RIP is an interior gateway protocol that specifies how
routers exchange routing-table information. The parent Router screen also allows the administrator
to select the type of RIP and the type of RIP authentication used.

For detailed information on configuring RIP functionality as part of the AP-5131’s Router functionality,
see Setting the RIP Configuration on page 5-59.

1.1.6 Manual Date and Time Settings

As an alternative to defining a NTP server to provide AP-5131 system time, the AP-513 can now have
its date and time set manually. A new Manual Date/Time Setting screen can be used to set the

AP-5131 time using a Year-Month-Day HH:MM:SS format.

For detailed information on manually setting the AP-5131’s system time, see Configuring Network

Time Protocol (NTP) on page 4-32.

1-5

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AP-5131 Access Point Product Reference Guide

1.2 Feature Overview

The Symbol AP-5131 has the following existing features carried forward from its initial 1.0 release:

• Single or Dual Mode Radio Options

• Separate LAN and WAN Ports

• Multiple Mounting Options

• Antenna Support for 2.4 GHz and 5.2 GHz Radios

• Sixteen Configurable WLANs

• Support for 4 BSSIDs per Radio

• Quality of Service (QoS) Support

• Industry Leading Data Security

• VLAN Support

• Multiple Management Accessibility Options

• Updatable Firmware

• Programmable SNMP v1/v2/v3 Trap Support

• Power-over-Ethernet Support

• MU-MU Transmission Disallow

• Voice Prioritization

• Support for CAM and PSP MUs

• Statistical Displays

• Transmit Power Control

• Advanced Event Logging Capability

• Configuration File Import/Export Functionality

• Default Configuration Restoration

• DHCP Support

• Multi-Function LEDs

1.2.1 Single or Dual Mode Radio Options

One or two possible configurations are available on the AP-5131 depending on which model is
purchased. If the AP-5131 is manufactured as a single radio access point, the AP-5131 enables you
to configure the single radio for either 802.11a or 802.11b/g.

AP-5131 Introduction

If the AP-5131 is manufactured as a dual-radio access point, the AP-5131 enables you to configure
one radio for 802.11a, and the other 802.11b/g.

For detailed information on configuring your AP-5131, see Setting the WLAN’s Radio Configuration

on page 5-45.

1.2.2 Separate LAN and WAN Ports

The AP-5131 has one LAN port and one WAN port, each with their own MAC address. The AP-5131
must manage all data traffic over the LAN connection carefully as either a DHCP client, BOOTP client,
DHCP server or using a static IP address. The AP-5131 can only use a Power-over-Ethernet device
when connected to the LAN port.

For detailed information on configuring the AP-5131 LAN port, see Configuring the LAN Interface on

page 5-1.

A Wide Area Network (WAN) is a widely dispersed telecommunications network. In a corporate
environment, the WAN port might connect to a larger corporate network. For a small business, the
WAN port might connect to a DSL or cable modem to access the Internet. Regardless, network
address information must be configured for the AP-5131’s intended mode of operation.

1-7

For detailed information on configuring the AP-5131’s WAN port, see Configuring WAN Settings on

page 5-14.

The LAN and WAN port MAC addresses can be located within the LAN and WAN Stats screens.

For detailed information on locating the AP-5131 MAC addresses, see Viewing WAN Statistics on

page 7-2 and Viewing LAN Statistics on page 7-6.

1.2.3 Multiple Mounting Options

The AP-5131 rests on a flat surface, attaches to a wall, mounts under a ceiling or above a ceiling
(attic). Choose a mounting option based on the physical environment of the coverage area. Do not
mount the AP-5131 in a location that has not been approved in an AP-5131 radio coverage site survey.

For detailed information on the mounting options available for the AP-5131, see Mounting the

AP-5131 on page 2-11.

1.2.4 Antenna Support for 2.4 GHz and 5.2 GHz Radios

The AP-5131 supports several 802.11a and 802.11b/g radio antennas. Select the antenna best suited
to the radio transmission requirements of your coverage area.

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AP-5131 Access Point Product Reference Guide

For an overview of the Radio 1 (2.4 GHz) and Radio 2 (5.2 GHz) antennas supported on the AP-5131’s
Reverse SMA (RSMA) connectors, see Antenna Specifications on page A-4.

1.2.5 Sixteen Configurable WLANs

A Wireless Local Area Network (WLAN) is a data-communications system that flexibly extends the
functionalities of a wired LAN. A WLAN does not require lining up devices for line-of-sight
transmission, and are thus, desirable for wireless networking. Roaming users can be handed off from
one AP-5131 to another like a cellular phone system. WLANs can therefore be configured around the
needs of specific groups of users, even when they are not in physical proximity. Sixteen WLANs are
configurable on each AP-5131.

To enable and configure WLANs on an AP-5131 radio, see Enabling Wireless LANs (WLANs) on page

5-22.

1.2.6 Support for 4 BSSIDs per Radio

The AP-5131 supports four BSSIDs per radio. Each BSSID has a corresponding MAC address. The first
MAC address corresponds to BSSID #1. The MAC addresses for the other three BSSIDs (BSSIDs #2,
#3, #4) are derived by adding 1, 2, 3, respectively, to the radio MAC address.

If the radio MAC address displayed on the Radio Settings screen is 00:A0:F8:72:20:DC, then the
BSSIDs for that radio will have the following MAC addresses:

BSSID MAC Address Hexadecimal Addition

BSSID #1 00:A0:F8:72:20:DC Same as Radio MAC address

BSSID #2 00:A0:F8:72:20:DD Radio MAC address +1

BSSID #3 00:A0:F8:72:20:DE Radio MAC address +2

BSSID #4 00:A0:F8:72:20:DF Radio MAC address +3

For detailed information on strategically mapping BSSIDs to WLANs, see Configuring the 802.11a or

802.11b/g Radio on page 5-48.

AP-5131 Introduction

1.2.7 Quality of Service (QoS) Support

The AP-5131 QoS implementation provides applications running on different wireless devices a
variety of priority levels to transmit data to and from the AP-5131. Equal data transmission priority is
fine for data traffic from applications such as Web browsers, file transfers or email, but is inadequate
for multimedia applications.

Voice over Internet Protocol (VoIP), video streaming and interactive gaming are highly sensitive to
latency increases and throughput reductions. These forms of higher priority data traffic can
significantly benefit from the AP-5131 QoS implementation.The WiFi Multimedia QOS Extensions
(WMM) implementation used by the AP-5131 shortens the time between transmitting higher priority
data traffic and is thus desirable for multimedia applications. In addition, U-APSD (WMM Power
Save) is also supported.

WMM defines four access categories—voice, video, best effort and background—to prioritize traffic
for providing enhanced multimedia support.

For detailed information on configuring QoS support for the AP-5131, see Setting the WLAN Quality

of Service (QoS) Policy on page 5-34.

1.2.8 Industry Leading Data Security

1-9

The AP-5131 supports numerous encryption and authentication techniques to protect the data
transmitting on the WLAN.

The following authentication techniques are supported on the AP-5131:

• Kerberos Authentication

• EAP Authentication

The following encryption techniques are supported on the AP-5131:

• WEP Encryption

• KeyGuard Encryption

• Wi-Fi Protected Access (WPA) Using TKIP Encryption

• WPA2-CCMP (802.11i) Encryption

In addition, the AP-5131 supports the following additional security features:

• Firewall Security

• VPN Tunnels

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AP-5131 Access Point Product Reference Guide

• Content Filtering

For an overview on the encryption and authentication schemes available on the AP-5131, refer to

Configuring Access Point Security on page 6-1.

1.2.8.1 Kerberos Authentication

Authentication is a means of verifying information that is transmitted from a secure source. If
information is authentic, you know who created it and you know that it has not been altered in any
way since it was originated. Authentication entails a network administrator employing a software
“supplicant” on their computer or wireless device.

Authentication is critical for the security of any wireless LAN device. Traditional authentication
methods are not suitable for use in wireless networks where an unauthorized user can monitor
network traffic and intercept passwords. The use of strong authentication methods that do not
disclose passwords is necessary. Symbol uses the Kerberos authentication service protocol (specified
in RFC 1510), to authenticate users/clients in a wireless network environment and to securely
distribute the encryption keys used for both encrypting and decrypting.

A basic understanding of RFC 1510 Kerberos Network Authentication Service (V5) is helpful in
understanding how Kerberos functions. By default, WLAN devices operate in an open system network
where any wireless device can associate with an AP without authorization. Kerberos requires device
authentication before access to the wired network is permitted.

For detailed information on Kerbeors configurations, see Configuring Kerberos Authentication on

page 6-9.

1.2.8.2 EAP Authentication

The Extensible Authentication Protocol (EAP) feature provides access points and their associated
MU’s an additional measure of security for data transmitted over the wireless network. Using EAP,
authentication between devices is achieved through the exchange and verification of certificates.

EAP is a mutual authentication method whereby both the MU and AP are required to prove their
identities. Like Kerberos, the user loses device authentication if the server cannot provide proof of
device identification

Using EAP, a user requests connection to a WLAN through the AP-5131. The AP-5131 then requests
the identity of the user and transmits that identity to an authentication server. The server prompts the
AP for proof of identity (supplied to the AP-5131 by the user) and then transmits the user data back
to the server to complete the authentication.

AP-5131 Introduction

An MU is not able to access the network if not authenticated. When configured for EAP support, the
access point displays the MU as an EAP station.

EAP is only supported on mobile devices running Windows XP, Windows 2000 (using Service Pack #4)
and Windows Mobile 2003. Refer to the system administrator for information on configuring a Radius
Server for EAP (802.1x) support.

For detailed information on EAP configurations, see Configuring 802.1x EAP Authentication on page

6-11.

1.2.8.3 WEP Encryption

All WLAN devices face possible information theft. Theft occurs when an unauthorized user
eavesdrops to obtain information illegally. The absence of a physical connection makes wireless links
particularly vulnerable to this form of theft. Most forms of WLAN security rely on encryption to
various extents. Encryption entails scrambling and coding information, typically with mathematical
formulas called algorithms, before the information is transmitted. An algorithm is a set of instructions
or formula for scrambling the data. A key is the specific code used by the algorithm to encrypt or
decrypt the data. Decryption is the decoding and unscrambling of received encrypted data.

The same device, host computer or front-end processor, usually performs both encryption and
decryption. The data transmit or receive direction determines whether the encryption or decryption
function is performed. The device takes plain text, encrypts or scrambles the text typically by
mathematically combining the key with the plain text as instructed by the algorithm, then transmits
the data over the network. At the receiving end, another device takes the encrypted text and decrypts,
or unscrambles, the text revealing the original message. An unauthorized user can know the
algorithm, but cannot interpret the encrypted data without the appropriate key. Only the sender and
receiver of the transmitted data know the key.

1-11

Wired Equivalent Privacy (WEP) is an encryption security protocol specified in the IEEE Wireless
Fidelity (Wi-Fi) standard, 802.11b and supported by the AP-5131 AP. WEP encryption is designed to
provide a WLAN with a level of security and privacy comparable to that of a wired LAN. The level of
protection provided by WEP encryption is determined by the encryption key length and algorithm. An
encryption key is a string of case sensitive characters used to encrypt and decrypt data packets
transmitted between a mobile unit (MU) and the AP-5131. An AP-5131 and associated wireless
clients must use the same encryption key (typically 1 through 4) to interoperate.

For detailed information on WEP configurations, see Configuring WEP Encryption on page 6-16.

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AP-5131 Access Point Product Reference Guide

1.2.8.4 KeyGuard Encryption

Use KeyGuard to shield the master encryption keys from being discovered through hacking. KeyGuard
negotiation takes place between the access point and MU upon association. The access point can
use KeyGuard with Symbol MUs. KeyGuard is only supported on Symbol MUs making it a Symbol
proprietary security mechanism.

For detailed information on KeyGuard configurations, see Configuring KeyGuard Encryption on page

6-18.

1.2.8.5 Wi-Fi Protected Access (WPA) Using TKIP Encryption

Wi-Fi Protected Access (WPA) is a security standard for systems operating with a Wi-Fi wireless
connection. WEP’s lack of user authentication mechanisms is addressed by WPA. Compared to WEP,
WPA provides superior data encryption and user authentication.

WPA addresses the weaknesses of WEP by including:

• a per-packet key mixing function

• a message integrity check

• an extended initialization vector with sequencing rules

• a re-keying mechanism

WPA uses an encryption method called Temporal Key Integrity Protocol (TKIP). WPA employs 802.1X
and Extensible Authentication Protocol (EAP).

For detailed information on WPA using TKIP configurations, see Configuring WPA Using TKIP on page

6-20.

1.2.8.6 WPA2-CCMP (802.11i) Encryption

WPA2 is a newer 802.11i standard that provides even stronger wireless security than Wi-Fi Protected
Access (WPA) and WEP. Counter-mode/CBC-MAC Protocol (CCMP) is the security standard used by
the Advanced Encryption Standard (AES). AES serves the same function TKIP does for WPA-TKIP.
CCMP computes a Message Integrity Check (MIC) using the proven Cipher Block Message
Authentication Code (CBC-MAC) technique. Changing just one bit in a message produces a totally
different result.

WPA2-CCMP is based on the concept of a Robust Security Network (RSN), which defines a hierarchy
of keys with a limited lifetime (similar to TKIP). Like TKIP, the keys the administrator provides are used
to derive other keys. Messages are encrypted using a 128-bit secret key and a 128-bit block of data.
the end result is an encryption scheme as secure as any the AP-5131 provides.

AP-5131 Introduction

For detailed information on WPA2-CCMP configurations, see Configuring WPA2-CCMP (802.11i) on

page 6-22.

1.2.8.7 Firewall Security

A firewall keeps personal data in and hackers out. The AP-5131 firewall prevents suspicious Internet
traffic from proliferating the AP-5131 managed network. The AP-5131 performs network address
translation (NAT) on packets passing to and from the WAN port. This combination provides enhanced
security by monitoring communication with the wired network.

For detailed information on configuring the AP-5131 firewall, see Configuring Firewall Settings on

page 6-25.

1.2.8.8 VPN Tunnels

Virtual Private Networks (VPNs) are IP-based networks using encryption and tunneling providing
users remote access to a secure LAN. In essence, the trust relationship is extended from one LAN
across the public network to another LAN, without sacrificing security. A VPN behaves like a private
network; however, because the data travels through the public network, it needs several layers of
security. The AP-5131 can function as a robust VPN gateway.

For detailed information on configuring VPN security support, see Configuring VPN Tunnels on page

6-34.

1-13

1.2.8.9 Content Filtering

Content filtering allows system administrators to block specific commands and URL extensions from
going out through the AP-5131 WAN port only. Therefore, content filtering affords system
administrators selective control on the content proliferating the network and is a powerful screening
tool. Content filtering allows the blocking of up to 10 files or URL extensions and allows blocking of
specific outbound HTTP, SMTP, and FTP requests.

For detailed information on configuring content filtering support, see Configuring Content Filtering

Settings on page 6-50.

1.2.9 VLAN Support

A Virtual Local Area Network (VLAN) is a means to electronically separate data on the same AP-5131
from a single broadcast domain into separate broadcast domains. By using a VLAN, you can group by
logical function instead of physical location. There are 16 VLANs supported on the AP-5131. An
administrator can map up to 16 WLANs to 16 VLANs and enable or disable dynamic VLAN

1-14

AP-5131 Access Point Product Reference Guide

assignment. In addition to these 16 VLANs, the AP-5131 supports dynamic, user-based, VLANs when
using EAP authentication.

VLANs enable organizations to share network resources in various network segments within large
areas (airports, shopping malls, etc.). A VLAN is a group of clients with a common set of requirements
independent of their physical location. VLANs have the same attributes as physical LANs, but they
enable administrators to group clients even when they are not members of the same network
segment.

For detailed information on configuring VLAN support, see Configuring VLAN Support on page 5-4.

1.2.10 Multiple Management Accessibility Options

The AP-5131 can be accessed and configured using one of the following methods:

• Java-Based Web UI

• Human readable config file (imported via FTP or TFTP)

• MIB (Management Information Base)

• Command Line Interface (CLI) accessed via RS-232 or Telnet. Use the AP-5131 DB-9 serial
port for direct access to the command-line interface from a PC. Use Symbol's Null-Modem
cable (Part No. 25-632878-0) for the best fitting connection.

1.2.11 Updatable Firmware

Symbol periodically releases updated versions of the AP-5131 device firmware to the Symbol Web
site. If the AP-5131 firmware version displayed on the System Settings page (see Configuring System

Settings on page 4-2) is older than the version on the Web site, Symbol recommends updating the

AP-5131 to the latest firmware version for full feature functionality.

For detailed information on updating the AP-5131 firmware using FTP or TFTP, see Updating Device

Firmware on page 4-41.

1.2.12 Programmable SNMP v1/v2/v3 Trap Support

Simple Network Management Protocol (SNMP) facilitates the exchange of management information
between network devices. SNMP uses Management Information Bases (MIBs) to manage the device
configuration and monitor Internet devices in remote locations. MIB information accessed via SNMP
is defined by a set of managed objects called object identifiers (OIDs). An object identifier (OID) is
used to uniquely identify each object variable of a MIB.

AP-5131 Introduction

SNMP allows a network administrator to configure the AP-5131, manage network performance, find
and solve network problems, and plan for network growth. The AP-5131 supports SNMP management
functions for gathering information from its network components. The AP-5131 CDROM and the (AP­5131 downloads site) contains the following 2 MIB files:

• Symbol-CC-WS2000-MIB-2.0 (standard Symbol MIB file)

• Symbol-AP-5131-MIB (AP-5131 specific MIB file)

The AP-5131 SNMP agent functions as a command responder and is a multilingual agent responding
to SNMPv1, v2c and v3 managers (command generators). The factory default configuration maintains
SNMPv1/2c support of the community names, hence providing backward compatibility.

For detailed information on configuring SNMP traps, see Configuring SNMP Settings on page 4-17.

1.2.13 Power-over-Ethernet Support

When users purchase a Symbol WLAN solution, they often need to place access points in obscure
locations. In the past, a dedicated power source was required for each access point in addition to the
Ethernet infrastructure. This often required an electrical contractor to install power drops at each
access point location.

1-15

An approved power injector solution merges power and Ethernet into one cable, reducing the burden
of installation and allows optimal AP-5131 placement in respect to the intended radio coverage area.
The AP-5131 can only use a Power-over-Ethernet device when connected to the LAN port.

The Symbol Power Injector (Part No. AP-PSBIAS-T-1P-AF) is a single-port, 802.3af compliant Power
over Ethernet hub combining low-voltage DC with Ethernet data in a single cable connecting to the
AP-5131. The Power Injector’s single DC and Ethernet data cable creates a modified Ethernet cabling
environment on the AP-5131’s LAN port eliminating the need for separate Ethernet and power cables.

For detailed information on using the Symbol Power Injector, see Symbol Power Injector System on

page 2-8.

1.2.14 MU-MU Transmission Disallow

The AP-5131’s MU-MU Disallow feature prohibits MUs from communicating with each other even if
they are on different WLANs, assuming one of the WLAN’s is configured to disallow MU-MU
communication. Therefore, if an MU’s WLAN is configured for MU-MU disallow, it will not be able to
communicate with any other MUs connected to this AP-5131.

For detailed information on configuring an AP-5131 WLAN to disallow MU to MU communications,
see Creating/Editing Individual WLANs on page 5-24.

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AP-5131 Access Point Product Reference Guide

1.2.15 Voice Prioritization

Each AP-5131 WLAN has the capability of having its QoS policy configured to prioritize the network
traffic requirements for associated MUs. A WLAN QoS page is available for each enabled WLAN on
either the AP-5131 802.11a or 802.11b/g radio.

Use the QoS page to enable voice prioritization for devices to receive the transmission priority they
may not normally receive over other data traffic. Voice prioritization allows the AP-5131 to assign
priority to voice traffic over data traffic, and (if necessary) assign legacy voice supported devices (non
WMM supported voice devices) additional priority.

For detailed information on configuring voice prioritization over other voice enabled devices, see

Setting the WLAN Quality of Service (QoS) Policy on page 5-34.

1.2.16 Support for CAM and PSP MUs

The AP-5131 supports both CAM and PSP powered MUs. CAM (Continuously Aware Mode) MUs
leave their radios on continuously to hear every beacon and message transmitted. These systems
operate without any adjustments by the AP-5131.

A beacon is a uniframe system packet broadcast by the AP to keep the network synchronized. A
beacon includes the ESSID, AP-5131 MAC address, Broadcast destination addresses, a time stamp,
a DTIM (Delivery Traffic Indication Message) and the TIM (Traffic Indication Map).

PSP (Power Save Polling) MUs power off their radios for short periods. When a Symbol MU in PSP
mode associates with an AP-5131, it notifies the AP-5131 of its activity status. The AP-5131 responds
by buffering packets received for the MU. PSP mode is used to extend an MU’s battery life by enabling
the MU to “sleep” during periods of inactivity.

1.2.17 Statistical Displays

The AP-5131 can display robust transmit and receive statistics for the WAN and LAN ports. WLAN
stats can be displayed collectively and individually for enabled WLANs. Transmit and receive
statistics are available for the AP-5131’s 802.11a and 802.11b/g radios. An advanced radio statistics
page is also available to display retry histograms for specific data packet retry information.

Associated MU stats can be displayed collectively and individually for specific MUs. An echo (ping)
test is also available to ping specific MUs to assess association strength. Finally, the AP-5131 can
detect and display the properties of other APs detected within the AP-5131’s radio coverage area. The
type of AP detected can be displayed as well as the properties of individual APs.

AP-5131 Introduction

For detailed information on available AP-5131 statistical displays and the values they represent, see

Monitoring Statistics on page 7-1.

1.2.18 Transmit Power Control

The AP-5131 has a configurable power level for each radio. This enables the network administrator
to define the antenna’s transmission power level in respect to the AP-5131’s placement or network
requirements as defined in the AP-5131 site survey.

For detailed information on setting the radio transmit power level, see Configuring the 802.11a or

802.11b/g Radio on page 5-48.

1.2.19 Advanced Event Logging Capability

The AP-5131 provides the capability for periodically logging system events. Logging events is useful
in assessing the throughput and performance of the AP-5131 or troubleshooting problems on the
AP-5131 managed Local Area Network (LAN).

For detailed information on AP-5131 events, see Logging Configuration on page 4-35.

1.2.20 Configuration File Import/Export Functionality

1-17

Configuration settings for an AP-5131 can be downloaded from the current configuration of another
AP-5131. This affords the administrator the opportunity to save the current configuration before
making significant changes or restoring the default configuration.

For detailed information on importing or exporting configuration files, see Importing/Exporting

Configurations on page 4-37.

1.2.21 Default Configuration Restoration

The AP-5131 has the ability to restore its default configuration or a partial default configuration with
the exception of current WAN and SNMP settings. Restoring the default configuration is a good way
to create new WLANs if the MUs the AP-5131 supports have been moved to different radio coverage
areas.

For detailed information on restoring a default or partial default configuration, see Configuring

System Settings on page 4-2.

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AP-5131 Access Point Product Reference Guide

1.2.22 DHCP Support

The AP-5131 can use Dynamic Host Configuration Protocol (DHCP) to obtain a leased IP address and
configuration information from a remote server. DHCP is based on the BOOTP protocol and can coexist
or interoperate with BOOTP. Configure the AP-5131 to send out a DHCP request searching for a DHCP/
BOOTP server to acquire HTML, firmware or network configuration files when the AP-5131 boots.
Because BOOTP and DHCP interoperate, whichever responds first becomes the server that allocates
information.

The AP-5131 can be set to only accept replies from DHCP or BOOTP servers or both (this is the default
setting). Disabling DHCP disables BOOTP and DHCP and requires network settings to be set manually.
If running both DHCP and BOOTP, do not select BOOTP Only. BOOTP should only be used when the
server is running BOOTP exclusively.

The DHCP client automatically sends a DHCP request at an interval specified by the DHCP server to
renew the IP address lease as long as the AP-5131 is running (this parameter is programmed at the
DHCP server). For example: Windows 2000 servers typically are set for 3 days.

1.2.23 Multi-Function LEDs

The AP-5131 houses seven LED indicators. Four LEDs exist on the top of the AP-5131 and are visible
from wall, ceiling and table-top orientations. Three of these four LEDs are single color activity LEDs,
and one is a multi-function red and white status LED. Two LEDs exist on the rear of the AP-5131 and
are viewable using a single (customer installed) extended light pipe, adjusted as required to suit
above the ceiling installations.

For detailed information of the AP-5131 LEDs and their functionality, see LED Indicators on page 2-20.

1.3 Theory of Operations

To understand AP-5131 management and performance alternatives, users need familiarity with

AP-5131 functionality and configuration options. The AP-5131 includes features for different

interface connections and network management.

The AP-5131 uses electromagnetic waves to transmit and receive electric signals without wires.
Users communicate with the network by establishing radio links between mobile units (MUs) and
access points.

The AP-5131 uses DSSS (direct sequence spread spectrum) to transmit digital data from one device
to another. A radio signal begins with a carrier signal that provides the base or center frequency. The

AP-5131 Introduction

digital data signal is encoded onto the carriers using a DSSS chipping algorithm. The AP-5131 radio
signal propagates into the air as electromagnetic waves. A receiving antenna (on the MU) in the path
of the waves absorbs the waves as electrical signals. The receiving MU interprets (demodulates) the
signal by reapplying the direct sequence chipping code. This demodulation results in the original
digital data.

The AP-5131 uses its environment (the air and certain objects) as the transmission medium.The

AP-5131 can either transmit in the 2.4 to 2.5-GHz frequency range (802.11b/g radio) or the 5.2 GHz

frequency range (802.11a radio), the actual range is country-dependent. Symbol devices, like other
Ethernet devices, have unique, hardware encoded Media Access Control (MAC) or IEEE addresses.
MAC addresses determine the device sending or receiving data. A MAC address is a 48-bit number
written as six hexadecimal bytes separated by colons. For example: 00:A0:F8:24:9A:C8

Also see the following sections:

• Cellular Coverage

• MAC Layer Bridging

• Content Filtering

• DHCP Support

• Media Types

• Direct-Sequence Spread Spectrum

• MU Association Process

• Operating Modes

• Management Access Options

1-19

1.3.1 Cellular Coverage

An AP-5131 establishes an average communication range with MUs called a Basic Service Set (BSS)
or cell. When in a particular cell, the MU associates and communicates with the AP-5131 supporting
the radio coverage area of that cell. Adding AP-5131’s to a single LAN establishes more cells to
extend the range of the network. Configuring the same ESSID (Extended Service Set Identifier) on all
AP-5131s makes them part of the same Wireless LAN.

AP-5131s with the same ESSID defines a coverage area. A valid ESSID is an alphanumeric, case­sensitive identifier up to 32 characters. An MU searches for an AP-5131 with a matching ESSID and
synchronizes (associates) to establish communications. This device association allows MUs within
the coverage area to move about or roam. As the MU roams from cell to cell, it associates with a

1-20

AP-5131 Access Point Product Reference Guide

different AP-5131. The roam occurs when the MU analyzes the reception quality at a location and
determines a different AP-5131 provides better signal strength and lower MU load distribution.

If the MU does not find an AP-5131 with a workable signal, it can perform a scan to find any AP. As
MUs switch APs, the AP updates its association statistics.

The user can configure the ESSID to correspond to up to 16 WLANs on each 802.11a or 802.11b/g
radio. A Wireless Local Area Network (WLAN) is a data-communications system that flexibly extends
the functionalities of a wired LAN. A WLAN does not require lining up devices for line-of-sight
transmission, and are thus, desirable. Within the WLAN, roaming users can be handed off from one
AP-5131 to another like a cellular phone system. WLANs can therefore be configured around the
needs of specific groups of users, even when they are not in physical proximity.

1.3.2 MAC Layer Bridging

The AP-5131 provides MAC layer bridging between its interfaces. The AP-5131 monitors traffic from
its interfaces and, based on frame address, forwards the frames to the proper destination. The

AP-5131 tracks source and destination addresses to provide intelligent bridging as MUs roam or

network topologies change. The AP-5131 also handles broadcast and multicast messages and
responds to MU association requests.

The AP-5131 listens to all packets on its LAN and WAN interfaces and builds an address database
using MAC addresses. An address in the database includes the interface media that the device uses
to associate with the AP-5131. The AP-5131 uses the database to forward packets from one interface
to another. The bridge forwards packets addressed to unknown systems to the Default Interface
(Ethernet).

The AP-5131 internal stack interface handles all messages directed to the AP-5131. Each AP-5131
stores information on destinations and their interfaces to facilitate forwarding. When a user sends
an ARP (Address Resolution Protocol) request packet, the AP-5131 forwards it over all enabled
interfaces except over the interface the ARP request packet was received.

On receiving the ARP response packet, the AP-5131 database keeps a record of the destination
address along with the receiving interface. With this information, the AP-5131 forwards any directed
packet to the correct destination. Transmitted ARP request packets echo back to other MUs. The

AP-5131 removes from its database the destination or interface information that is not used for a

specified time. The AP refreshes its database when it transmits or receives data from these
destinations and interfaces.

AP-5131 Introduction

1.3.3 Media Types

The AP-5131 radio interface conforms to IEEE 802.11a/b/g specifications. The interface operates at
a maximum 54Mbps (802.11a radio) using direct-sequence radio technology. The AP-5131 supports
multiple-cell operations with fast roaming between cells. Within a direct-sequence system, each cell
can operates independently. Adding cells to the network provides increased coverage area and total
system capacity.

The RS-232 serial port provides a Command Line Interface (CLI) connection. The serial link supports
a direct serial connection. The AP-5131 is a Data Terminal Equipment (DTE) device with male pin
connectors for the RS-232 port. Connecting the AP-5131 to a PC requires a null modem serial cable.

1.3.4 Direct-Sequence Spread Spectrum

Spread spectrum (broadband) uses a narrowband signal to spread the transmission over a segment
of the radio frequency band or spectrum. Direct-sequence is a spread spectrum technique where the
transmitted signal is spread over a particular frequency range. The Symbol AP-5131 uses Direct-
Sequence Spread Spectrum (DSSS) for radio communication.

Direct-sequence systems communicate by continuously transmitting a redundant pattern of bits
called a chipping sequence. Each bit of transmitted data is mapped into chips by the AP-5131 and
rearranged into a pseudorandom spreading code to form the chipping sequence. The chipping
sequence is combined with a transmitted data stream to produce the AP -5131’s output signal.

1-21

MUs receiving a direct-sequence transmission use the spreading code to map the chips within the
chipping sequence back into bits to recreate the original data transmitted by the AP-5131.
Intercepting and decoding a direct-sequence transmission requires a predefined algorithm to
associate the spreading code used by the transmitting AP-5131 to the receiving MU. This algorithm
is established by IEEE 802.11b specifications. The bit redundancy within the chipping sequence
enables the receiving MU to recreate the original data pattern, even if bits in the chipping sequence
are corrupted by interference.

The ratio of chips per bit is called the spreading ratio. A high spreading ratio increases the resistance
of the signal to interference. A low spreading ratio increases the bandwidth available to the user. The
AP-5131 uses different modulation schemes to encode more bits per chip at higher data rates. The
AP-5131 is capable of a maximum 54Mbps data transmission rate (802.11a radio), but the coverage
area is less than that of AP-5131 operating at lower data rates since coverage area decreases as
bandwidth increases.

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AP-5131 Access Point Product Reference Guide

1.3.5 MU Association Process

An AP-5131 recognizes MUs as they begin the association process with the AP-5131. An AP-5131
keeps a list of the MUs it services. MUs associate with an AP-5131 based on the following conditions:

• Signal strength between the AP-5131and MU

• Number of MUs currently associated with the AP-5131

• MUs encryption and authentication capabilities

• MUs supported data rate

MUs perform pre-emptive roaming by intermittently scanning for AP-5131’s and associating with the
best available AP-5131. Before roaming and associating, MUs perform full or partial scans to collect
AP-5131 statistics and determine the direct-sequence channel used by the AP-5131.

Scanning is a periodic process where the MU sends out probe messages on all channels defined by
the country code. The statistics enable an MU to reassociate by synchronizing its channel to the

AP-5131. The MU continues communicating with that AP-5131 until it needs to switch cells or roam.

MUs perform partial scans at programmed intervals, when missing expected beacons or after
excessive transmission retries. In a partial scan, the MU scans AP-5131’s classified as proximate on
the AP-5131 table. For each channel, the MU tests for Clear Channel Assessment (CCA). The MU
broadcasts a probe with the ESSID and broadcast BSS_ID when the channel is transmission-free. It
sends an ACK to a directed probe response from the AP-5131 and updates the table.

An MU can roam within a coverage area by switching AP-5131s. Roaming occurs when:

• Unassociated MU attempts to associate or reassociate with an available AP-5131

• Supported rate changes or the MU finds a better transmit rate with another AP-5131

• RSSI (received signal strength indicator) of a potential AP-5131 exceeds the current

AP-5131

• Ratio of good-transmitted packets to attempted-transmitted packets falls below a threshold.

An MU selects the best available AP-5131 and adjusts itself to the AP-5131 direct-sequence channel
to begin association. Once associated, the AP-5131 begins forwarding frames addressed to the target
MU. Each frame contains fields for the current direct-sequence channel. The MU uses these fields to
resynchronize to the AP-5131.

The scanning and association process continues for active MUs. This process allows the MUs to find
new AP-5131’s and discard out-of-range or deactivated AP-5131’s. By testing the airwaves, the MUs
can choose the best network connection available.

AP-5131 Introduction

1.3.6 Operating Modes

The AP-5131 can operate in a couple of configurations.

• Access Point - As an Access Point, the AP-5131 functions as a layer 2 bridge (similar to

Symbol’s existing AP-4131 access point). The wired uplink can operate as a trunk and
support multiple VLANs. Up to 16 WLANs can be defined and mapped to AP-5131 WLANs.
Each WLAN can be configured to be broadcast by one or both AP-5131 radios (unlike the

AP-4131). The AP-5131 can operate in both an Access Point mode and Wireless Gateway/

Router mode simultaneously. The network architecture and AP-5131 configuration define
how the Access Point and Wireless Gateway/Router mode are negotiated.

• Wireless Gateway/Router - If operating as a Wireless Gateway/Router, the AP-5131

functions as a router between two layer 2 networks: the WAN uplink (the ethernet port) and
the Wireless side. The following options are available providing a solution for single-cell
deployment:

• PPPoE - The WAN interface can terminate a PPPoE connection, thus enabling the

AP-5131 to operate in conjunction with a DSL or Cable modem to provide WAN

connectivity.

• NAT - (Network Address Translation) on the Wireless interface. Using NAT, the AP-5131

router is able to manage a private IP scheme. NAT allows translation of private
addresses to the WAN IP address.

• DHCP - On the Wireless side, the AP-5131 can assign private IP addresses.

• Firewall - In between the WAN and Wireless interfaces, a Firewall protects against a

number of known attacks.

1-23

1.3.7 Management Access Options

Managing the AP-5131 includes viewing network statistics and setting configuration options.
Statistics track the network activity of associated MUs and data transfers on the AP interfaces.

The AP-5131 requires one of the following connection methods to perform a custom installation and
manage the network:

• Secure Java-Based WEB UI - (use Sun Microsystems’ JRE 1.5 or higher available from Sun’s

Web site and be sure to disable Microsoft’s Java Virtual Machine if installed)

• Command Line Interface (CLI) via Serial, Telnet and SSH

• Config file - Human-readable; Importable/Exportable via FTP and TFTP

1-24

AP-5131 Access Point Product Reference Guide

• MIB (Management Information Base) accessing the AP-5131 SNMP function using a MIB
Browser. The AP-5131 CDROM contains the following 2 MIB files:

• Symbol-CC-WS2000-MIB-2.0 (standard Symbol MIB file)

• Symbol-AP-5131-MIB (AP-5131 specific MIB file)

Make configuration changes to AP-5131’s individually. Optionally, use the AP-5131 import/export
configuration function to download AP-5131’s settings to other AP-5131s.

For detailed information, see Importing/Exporting Configurations on page 4-37.

Hardware Installation

An AP-5131 installation includes mounting the AP-5131 on a table-top, wall, ceiling T-bar or above
the ceiling (attic or plenum), connecting the AP-5131 to the network (LAN or WAN port connection),
connecting antennae and applying power. Installation procedures vary for different environments.

See the following sections for more details:

• Precautions

• Package Contents

• Requirements

• Placement of the AP-5131

• Power Options

• Symbol Power Injector System

• Mounting the AP-5131

• LED Indicators

• Setting Up MUs

2-2

AP-5131 Access Point Product Reference Guide

CAUTION Symbol recommends conducting a radio site survey prior to installing

!

the AP-5131. A site survey is an excellent method of documenting
areas of radio interference and providing a tool for AP-5131
placement.

2.1 Precautions

Before installing the AP-5131 verify the following:

• Do not install in wet or dusty areas without additional protection. Contact a Symbol
representative for more information.

• Verify the environment has a continuous temperature range between -20° C to 50° C.

2.2 Package Contents

Check package contents for the correct model AP-5131 and applicable AP-5131 accessories. Each
available configuration (at a minimum), contains the following:

• AP-5131 (two models available)

• Single 802.11a/g radio, external antenna (Part No. AP-5131-4002X-WW)

• Dual 802.11a+g radios, external antenna (Part No. AP-5131-1304X-WW)

• Software and Documentation CD-ROM

• AP-5131 Install Guide (Part No. 72-70931-01)

• Accessories Bag (4 rubber feet for desk mounting and a LED light pipe, badge and label for
above the ceiling installations).

2.2.1 Available Product Configurations

An AP-5131 can be ordered in the following access point and accessory combinations:

Symbol Part # Description

AP-5131-13040-WW AP-5131 802.11a+g Dual Radio Access Point

AP-5131 Install Guide
Software and Documentation CD-ROM
Accessories Bag

Symbol Part # Description

AP-5131-13041-WWR AP-5131 802.11a+g Dual Radio Access Point

AP-5131 Install Guide
Power Injector (Part No. AP-PSBIAS-1P2-AFR)
Software and Documentation CD-ROM
Accessories Bag

AP-5131-13042-WW AP-5131 802.11a+g Dual Radio Access Point

AP-5131 Install Guide
Software and Documentation CD-ROM
(4) Dual-Band Antennae (Part No. ML-2452-APA2-01)
Accessories Bag

AP-5131-13043-WWR AP-5131 802.11a+g Dual Radio Access Point

AP-5131 Install Guide
Software and Documentation CD-ROM
Power Injector (Part No. AP-PSBIAS-1P2-AFR)
(4) Dual-Band Antennae (Part No. ML-2452-APA2-01)
Accessories Bag

AP-5131-40020-WW AP-5131 802.11a/g Single Radio Access Point

AP-5131 Install Guide
Software and Documentation CD-ROM
Accessories Bag

AP-5131-40021-WWR AP-5131 802.11a/g Single Radio Access Point

AP-5131 Install Guide
Software and Documentation CD-ROM
Power Injector (Part No. AP-PSBIAS-1P2-AFR)
Accessories Bag

Hardware Installation

2-3

AP-5131-40022-WW AP-5131 802.11a/g Single Radio Access Point

AP-5131 Install Guide
Software and Documentation CD-ROM
(2) Dual-Band Antennae (Part No. ML-2452-APA2-01)
Accessories Bag

AP-5131-40023-WWR AP-5131 802.11a/g Single Radio Access Point

AP-5131 Install Guide
Software and Documentation CD-ROM
Power Injector (Part No. AP-PSBIAS-1P2-AFR)
(2) Dual-Band Antennae (Part No. ML-2452-APA2-01)
Accessories Bag

Verify the model indicated on the bottom of the AP-5131 is correct. Contact the Symbol Support
Center to report missing or improperly functioning items.

2-4

AP-5131 Access Point Product Reference Guide

The Symbol power injector (Part No. AP-PSBIAS-1P2-AFR) is included in certain orderable
configurations, but can be added to any configuration. For more information on the Symbol power
injector, see Symbol Power Injector System on page 2-8.

NOTE A standard Symbol 48 Volt Power Adapter (Part No. 50-24000-050) is

recommended with AP-5131 product SKUs that do not include the Symbol
power injector.

For an overview on the optional antennae available for the AP-5131, see Antenna Options on page 2-

5. For detailed specifications on the 2.4 GHz and 5.2 GHz antenna suite, see 2.4 GHz Antenna Matrix
on page A-4 and 5.2 GHz Antenna Matrix on page A-4.

CAUTION Using an antenna other than the Dual-Band Antenna (Part No.

!

ML-2452-APA2-01) could render the AP-5131’s Rogue AP Detector
Mode feature inoperable. Contact your Symbol sales associate for
specific information.

2.3 Requirements

The minimum installation requirements for a single-cell, peer-to-peer network:

• AP-5131 (either the dual or single radio model)

• AP-5131 48 Volt Power Supply (Part No. 50-24000-050) or Symbol power injector
(Part No. AP-PSBIAS-1P2-AFR)

• a power outlet

• Dual-Band Antennae (Part No. ML-2452-APA2-01)

NOTE The AP-5131 optimally uses 2 antennae for the single-radio model and 4

antennae for the dual-radio model.

.

2.4 Placement of the AP-5131

For optimal performance, install the AP-5131 away from transformers, heavy-duty motors, fluorescent
lights, microwave ovens, refrigerators and other industrial equipment. Signal loss can occur when

Hardware Installation

metal, concrete, walls or floors block transmission. Install the AP-5131 in open areas or add access
points as needed to improve coverage.

Antenna coverage is analogous to lighting. Users might find an area lit from far away to be not bright
enough. An area lit sharply might minimize coverage and create dark areas. Uniform antenna
placement in an area (like even placement of a light bulb) provides even, efficient coverage.

Place the AP-5131 using the following guidelines:

• Install the AP-5131 at an ideal height of 10 feet from the ground.

• Orient the AP-5131 antennae vertically for best reception.

• Point the AP-5131 antenna(s) downward if attaching to the ceiling.

Symbol recommends conducting a site survey to define and document radio interference obstacles
before installing the AP-5131 to maximize its radio coverage area.

2.4.1 Site Surveys

A site survey analyzes the installation environment and provides users with recommendations for
equipment and placement. The optimum placement of 802.11a access points differs from 802.11b/g
access points, because the locations and number of access points required are different to support
the radio coverage area.

2-5

Symbol recommends conducting a new site survey and developing a new coverage area floor plan
when switching from 2 or 11Mbps access points (AP-3021 or AP-4131 models) to 54Mbps access
points (AP-5131 models), as the device placement requirements are significantly different.

2.4.2 Antenna Options

Both Radio 1 and Radio 2 require one antenna and can optimally use two antennae per radio (4
antennae total for dual-radio models). Two antennae per radio provides diversity that can improve
performance and signal reception. Symbol supports two antenna suites for the AP-5131. One antenna

2-6

AP-5131 Access Point Product Reference Guide

suite supporting the 2.4 GHz band and another antenna suite supporting the 5.2 GHz band. Select an
antenna model best suited to the intended operational environment of your AP-5131.

NOTE On a single-radio AP-5131, Radio 1 can be configured to be either a 2.4

GHz or 5.2 GHz radio. On a dual-radio model, Radio 1 refers to the AP­5131’s 2.4 GHz radio and Radio 2 refers to the AP-5131 5.2 GHz radio.
However, there could be some cases where a dual-radio AP-5131 is
performing a Rogue AP detector function. In this scenario, the AP-5131 is
receiving in either 2.4 GHz or 5.2 GHz over the Radio 1 or Radio 2
antennae depending on which radio is selected for the scan.

Antenna connectors for Radio 1 are located in a different location from the Radio 2 antenna
connectors. On single radio versions, the R-SMA connectors can support both bands and should be
connected to a R-SMA dual-band antenna or an appropriate single band antenna. If necessary a R­SMA to R-BNC adapter (Part No. 25-72178-01) can be purchased separately from Symbol.

The 2.4 GHz antenna suite includes the following models:

Symbol Part Number Antenna Type Nominal Net Gain (dBi)

ML-2499-11PNA2-01R Wide Angle Directional 8.5

ML-2499-HPA3-01R Omni-Directional Antenna 3.3

ML-2499-BYGA2-01R Yagi Antenna 13.9

ML-2452-APA2-01 Dual-Band 3.0

NOTE An additional adapter is required to use ML-2499-11PNA2-01 and

ML-2499-BYGA2-01 model antennae. Please contact Symbol for more
information.

The 5.2 GHz antenna suite includes the following models:

Symbol Part Number Antenna Type Nominal Net Gain (dBi)

ML-5299-WPNA1-01R Panel Antenna 13.0

ML-5299-HPA1-01R Wide-Band Omni-Directional

Antenna

ML-2452-APA2-0 Dual-Band 4.0

5.0

Hardware Installation

2-7

For detailed specifications on the 2.4 GHz and 5.2 GHz antennae mentioned in this section, see
section 2.4 GHz Antenna Matrix on page A-4 and section 5.2 GHz Antenna Matrix on page A-4.

2-8

AP-5131 Access Point Product Reference Guide

2.5 Power Options

The power options for the AP-5131 include:

• Symbol Power Injector (Part No. AP-PSBIAS-1P2-AFR)

• Symbol 48-Volt Power Supply (Part No. 50-24000-050)

• Any standard 802.3af compliant device.

2.6 Symbol Power Injector System

The AP-5131 can receive power either directly form a Symbol 48V AC-DC power supply
(Part No. 50-24000-050) or via an Ethernet cable connected to the LAN port (using the 802.3af
standard).

When users purchase a Symbol WLAN solution, they often need to place access points in obscure
locations. In the past, a dedicated power source was required for each access point in addition to the
Ethernet infrastructure. This often required an electrical contractor to install power drops at each
access point location. An approved power injector solution merges power and Ethernet into one
cable, reducing the burden of installation and allows optimal AP-5131 placement in respect to the
intended radio coverage area.

The Symbol Power Injector is included in certain AP-5131 kits. The Symbol Power Injector
(Part No. AP-PSBIAS-1P2-AFR) is an integrated AC-DC converter and 802.3af power injector which
requires 110-220V AC power to combine low-voltage DC with Ethernet data in a single cable
connecting to the AP-5131. The AP-5131 can only use a Power Injector when connected to the LAN
port.

The Symbol AP-5131 Power Supply (Part No. 50-24000-050) is not included in the kit and is orderable
separately as an accessory.

CAUTION The AP-5131 supports any standards-based 802.3af compliant power

!

A separate power injector is required for each AP-5131 comprising the network.

source (including non-Symbol power sources). However, using the
wrong solution (including a POE system used on a legacy Symbol
access point) could severely damage the AP-5131 and void the
product warranty.

Hardware Installation

2.6.1 Installing the Power Injector

Refer to the following sections for information on planning, installing, and validating the power
injector installation:

• Preparing for Site Installation

• Cabling the Power Injector

• Power Injector LED Indicators

2.6.1.1 Preparing for Site Installation

The power injector can be installed free standing, on an even horizontal surface or wall mounted
using the power injector’s wall mounting key holes. The following guidelines should be adhered to
before cabling the power injector to an Ethernet source and an AP-5131:

• Do not block or cover airflow to the power injector.

• Keep the power injector away from excessive heat, humidity, vibration and dust.

• The power injector is not a repeater, and does not amplify the Ethernet data signal. For

optimal performance, ensure the power injector is placed as close as possible to the
network data port.

2-9

2.6.1.2 Cabling the Power Injector

To install the power injector to an Ethernet data source and AP-5131:

CAUTION Ensure AC power is supplied to the power injector using an AC cable

!

1. Connect the power injector to an AC outlet (110VAC to 220VAC).

2. Connect an RJ-45 Ethernet cable between the network data supply (host) and the power

injector Data In connector.

3. Connect an RJ-45 Ethernet cable between the power injector Data & Power Out connector

and the Symbol AP-5131 LAN port.

CAUTION Cabling the power injector to the AP-5131’s WAN port renders the

!

with an appropriate ground connection approved for the country of
operation.

AP-5131 non-operational. Only use a AP-PSBIAS-1P2-AFR model
power injector with the AP-5131’s LAN port.

2-10

AP-5131 Access Point Product Reference Guide

Ensure the cable length from the Ethernet source (host) to the power injector and AP-5131
does not exceed 100 meters (333 ft.)

The power injector has no On/Off power switch. The power injector receives power and is
ready for AP-5131 device connection and operation as soon as AC power is applied.

2.6.1.3 Power Injector LED Indicators

The power injector demonstrates the following LED behavior under normal and/or problematic
operating conditions:

LED AC (Main) Port

Green (Steady) Power injector is receiving power from AC

outlet.

Green (Blinking) Output voltage source is out of range. The power injector is overloaded or has a

For more information and device specifications for the Symbol power injector, refer to the Power
Injector Quick Install Guide (Part No. 72-70762-01) available from the Symbol Web site or the AP-5131
Software and documentation CDROM.

Indicates a device is connected to the
power injector’s outgoing Data & Power
cable.

short circuit.

Hardware Installation

2.7 Mounting the AP-5131

The AP-5131 can rest on a flat surface, attach to a wall, mount under a suspended T-Bar or above a
ceiling (plenum or attic). Choose one of the following mounting options based on the physical
environment of the coverage area. Do not mount the AP-5131 in a location that has not been approved
in a site survey.

Refer to the following, depending on how you intend to mount the AP-5131:

• Desk Mounted Installations

• Wall Mounted Installations

• Suspended Ceiling T-Bar Installations

• Above the Ceiling (Plenum) Installations

2.7.1 Desk Mounted Installations

The desk mount option uses rubber feet allowing the unit to sit on most flat surfaces. The four (4)
round rubber feet can be found in the AP-5131 (main) box in a separate plastic bag.

To install the AP-5131 in a desk mount orientation:

2-11

1. Turn the AP-5131 upside down.

2. Attach the radio antennae to their correct connectors.

The antenna protection plate cannot be used in a desk mount configuration, as the plate only
allows antennas to be positioned in a downward orientation.

CAUTION Both the Dual and Single Radio model AP-5131’s use RSMA type

!

3. Remove the backings from the four (4) rubber feet and attach them to the four rubber feet

recess areas on the AP-5131.

antenna connectors. On the Dual Radio AP-5131, a single dot on the
antenna connector indicates the primary antenna for both Radio 1 (2.4
GHz) and Radio 2 (5.2 GHz). Two dots designate the secondary
antenna for both Radio 1 and Radio 2. On Single Radio models, a
single dot on the antenna connector indicates the primary antenna for
Radio 1, and two dots designate the secondary antenna for Radio 1.

2-12

AP-5131 Access Point Product Reference Guide

4. Cable the AP-5131 using either the Symbol power injector solution or an approved line cord
and power supply.

CAUTION Do not supply power to the AP-5131 until the cabling of the unit is

!

For Symbol power injector installations:

complete.

a. Connect a RJ-45 Ethernet cable between the network data supply (host) and the power

injector Data In connector.

b. Connect a RJ-45 Ethernet cable between the power injector Data & Power Out

connector and the Symbol AP-5131 LAN port.

c. Ensure the cable length from the Ethernet source (host) to the power injector and

AP-5131 does not exceed 100 meters (333 ft). The power injector has no On/Off power
switch. The power injector receives power as soon as AC power is applied. For more
information on using the power injector, see Symbol Power Injector System on page 2-8.

For standard Symbol 48-Volt power adapter (Part No. 50-24000-050) and line cord
installations:

a. Connect RJ-45 Ethernet cable between the network data supply (host) and the AP-5131

LAN port.
b. Verify the power adapter is correctly rated according the country of operation.
c. Connect the power supply line cord to the power adapter.
d. Attach the power adapter cable into the power connector on the AP-5131.
e. Plug the power adapter into an outlet.

Hardware Installation

5. Verify the behavior of the AP-5131 LEDs. For more information, see LED Indicators on page

2-20.

6. Return the AP-5131 to an upright position and place it in the location you wish it to operate.

Ensure the AP-5131 is sitting evenly on all four rubber feet.

The AP-5131 is ready to configure. For information on an AP-5131 default configuration, see

Getting Started on page 3-1. For specific details on AP-5131 system configurations, see
System Configuration on page 4-1.

2.7.2 Wall Mounted Installations

Wall mounting requires hanging the AP-5131 along its width (or length) using the pair of slots on the
bottom of the unit and using the AP-5131 itself as a mounting template for the screws. The AP-5131
can be mounted onto any plaster or wood wall surface.

The mounting hardware and tools (customer provided) required to install the AP-5131 on a wall
consists of:

• Two Phillips pan head self-tapping screws (ANSI Standard) #6-18 X 0.875in. Type A or AB

Self-Tapping screw, or (ANSI Standard Metric) M3.5 X 0.6 X 20mm Type D Self-Tapping
screw

• Two wall anchors

• Security cable (optional)

2-13

To mount the AP-5131 on a wall:

1. Orient the AP-5131 on the wall by its width or length.

2. Using the arrows on one edge of the case as guides, move the edge to the midline of the

mounting area and mark points on the midline for the screws.

3. At each point, drill a hole in the wall, insert an anchor, screw into the anchor the wall

mounting screw and stop when there is 1mm between the screw head and the wall.

If pre-drilling a hole, the recommended hole size is 2.8mm (0.11in.) if the screws are going
directly into the wall and 6mm (0.23in.) if wall anchors are being used.

4. If required, install and attach a security cable to the AP-5131 lock port.

5. Place the large corner of each of the mount slots over the screw heads.

6. Slide the AP-5131 down along the mounting surface to hang the mount slots on the screw

heads.

7. Attach the radio antennae to their correct connectors.

2-14

AP-5131 Access Point Product Reference Guide

CAUTION Both the Dual and Single Radio model AP-5131s use RSMA type

!

8. Cable the AP-5131 using either the Symbol power injector solution or an approved line cord
and power supply.

NOTE The AP-5131 must be mounted with the RJ45 cable connector oriented

upwards to ensure proper operation.

CAUTION Do not supply power to the AP-5131 until the cabling of the unit is

!

antenna connectors. On the Dual Radio AP-5131, a single dot on the
antenna connector indicates the primary antenna for both Radio 1 (2.4
GHz) and Radio 2 (5.2 GHz). Two dots designate the secondary
antenna for both Radio 1 and Radio 2. On Single Radio models, a
single dot on the antenna connector indicates the primary antenna for
Radio 1, and two dots designate the secondary antenna for Radio 1.

complete.

For Symbol power injector installations:

a. Connect a RJ-45 Ethernet cable between the network data supply (host) and the Power

Injector Data In connector.

b. Connect a RJ-45 Ethernet cable between the power injector Data & Power Out

connector and the AP-5131 LAN port.

c. Ensure the cable length from the Ethernet source (host) to the power injector and

AP-5131 does not exceed 100 meters (333 ft). The power injector has no On/Off power
switch. The power injector receives power as soon as AC power is applied. For more
information on using the power injector, see Symbol Power Injector System on page 2-8.

For standard Symbol 48-Volt Power Adapter (Part No. 50-24000-050) and line cord
installations:

a. Connect RJ-45 Ethernet cable between the network data supply (host) and the AP-5131

LAN port.
b. Verify the power adapter is correctly rated according the country of operation.
c. Connect the power supply line cord to the power adapter.
d. Attach the power adapter cable into the power connector on the AP-5131.

Hardware Installation

e. Plug the power adapter into an outlet.

NOTE If the AP-5131 is utilizing remote management antennae, a wire cover

can be used to provide a clean finished look to the installation. Contact
Symbol for more information.

9. Verify the behavior of the AP-5131 LEDs. For more information, see LED Indicators on page

2-20.

The AP-5131 is ready to configure. For information on an AP-5131 default configuration, see

Getting Started on page 3-1. For specific details on AP-5131 system configurations, see
System Configuration on page 4-1.

2.7.3 Suspended Ceiling T-Bar Installations

A suspended ceiling mount requires holding the AP-5131 up against the T-bar of a suspended ceiling
grid and twisting the AP-5131 chassis onto the T-bar.

The mounting hardware and tools (customer provided) required to install the AP-5131 on a ceiling T­bar consists of:

• Safety wire (recommended)

• Security cable (optional)

2-15

To install the AP-5131 on a ceiling T-bar:

1. If required, loop a safety wire —with a diameter of at least 1.01 mm (.04 in.), but no more

than 0.158 mm (.0625 in.) —through the tie post (above the AP-5131’s console connector)
and secure the loop.

2. If required, install and attach a security cable to the AP-5131 lock port.

3. Attach the radio antennae to their correct connectors.

CAUTION Both the Dual and Single Radio model AP-5131s use RSMA type

!

antenna connectors. On the Dual Radio AP-5131, a single dot on the
antenna connector indicates the primary antenna for both Radio 1 (2.4
GHz) and Radio 2 (5.2 GHz). Two dots designate the secondary
antenna for both Radio 1 and Radio 2. On Single Radio models, a
single dot on the antenna connector indicates the primary antenna for
Radio 1, and two dots designate the secondary antenna for Radio 1

2-16

AP-5131 Access Point Product Reference Guide

4. Cable the AP-5131 using either the Symbol power injector solution or an approved line cord
and power supply.

CAUTION Do not supply power to the AP-5131 until the cabling of the unit is

!

For Symbol power injector installations:

a. Connect a RJ-45 Ethernet cable between the network data supply (host) and the Power

Injector Data In connector.

b. Connect a RJ-45 Ethernet cable between the power injector Data & Power Out

connector and the AP-5131 LAN port.

c. Ensure the cable length from the Ethernet source (host) to the power injector and

AP-5131 does not exceed 100 meters (333 ft). The power injector has no On/Off power
switch. The power injector receives power as soon as AC power is applied. For more
information on using the power injector, see Symbol Power Injector System on page 2-8.

For standard Symbol 48-Volt Power Adapter (Part No. 50-24000-050) and line cord
installations:

complete.

a. Connect RJ-45 Ethernet cable between the network data supply (host) and the AP-5131

LAN port.
b. Verify the power adapter is correctly rated according the country of operation.
c. Connect the power supply line cord to the power adapter.
d. Attach the power adapter cable into the power connector on the AP-5131.
e. Plug the power adapter into an outlet.

5. Verify the behavior of the AP-5131 LEDs. For more information, see LED Indicators on page

2-20.

6. Align the bottom of the ceiling T-bar with the back of the AP-5131.

7. Orient the AP-5131 chassis by its length and the length of the ceiling T-bar.

8. Rotate the AP-5131 chassis 45 degrees clockwise, or about 10 o’clock.

9. Push the back of the AP-5131 chassis on to the bottom of the ceiling T-bar.

CAUTION Ensure the safety wire and cabling used in the T-Bar AP-5131

!

installation is securely fastened to the building structure in order to
provide a safe operating environment.

Hardware Installation

10. Rotate the AP-5131 chassis 45 degrees counter-clockwise. The clips click as they fasten to

the T-bar.

2-17

11. The AP-5131 is ready to configure. For information on an AP-5131 default configuration, see

Getting Started on page 3-1. For specific details on AP-5131 system configurations, see
System Configuration on page 4-1.

NOTE If the AP-5131 is utilizing remote management antennae, a wire cover

can be used to provide a clean finished look to the installation. Contact
Symbol for more information.

2.7.4 Above the Ceiling (Plenum) Installations

An AP-5131 above the ceiling installation requires placing the AP-5131 above a suspended ceiling
and installing the provided light pipe under the ceiling tile for viewing the rear panel status LEDs of
the unit. An above the ceiling AP-5131 installation enables installations compliant with drop ceilings,
suspended ceilings and industry standard tiles from .625 to .75 inches thick.

NOTE The AP-5131 is Plenum rated to UL2043 and NEC1999 to support above

the ceiling installations.

2-18

AP-5131 Access Point Product Reference Guide

CAUTION Symbol does not recommend mounting the AP-5131 directly to any

!

The mounting hardware required to install the AP-5131 above a ceiling consists of:

• Light pipe

• Badge for light pipe

• Decal for badge

• Safety wire (strongly recommended)

• Security cable (optional)

To install the AP-5131 above a ceiling:

1. If possible, remove the adjacent ceiling tile from its frame and place it aside.

2. Install a safety wire, between 1.5mm (.06in.) and 2.5mm (.10in.) in diameter, in the ceiling
space.

3. If required, install and attach a security cable to the AP-5131’s lock port.

4. Mark a point on the finished side of the tile where the light pipe is to be located.

5. Create a light pipe path hole in the target position on the ceiling tile.

6. Use a drill to make a hole in the tile the approximate size of the AP-5131 LED light pipe.

suspended ceiling tile with a thickness less than 12.7mm (0.5in.) or a
suspended ceiling tile with an unsupported span greater than 660mm
(26in.). Symbol strongly recommends fitting the AP-5131 with a safety
wire suitable for supporting the weight of the device. The safety wire
should be a standard ceiling suspension cable or equivalent steel wire
between 1.59mm (.062in.) and 2.5mm (.10in.) in diameter.

CAUTION Symbol recommends care be taken not to damage the finished surface

!

7. Remove the light pipe’s rubber stopper before installing the light pipe.

8. Connect the light pipe to the bottom of the AP-5131. Align the tabs and rotate approximately
90 degrees. Do not over tighten

of the ceiling tile when creating the light pipe hole and installing the
light pipe.

Hardware Installation

Light Pipe

Ceiling Tile

Decal

Badge

9. Snap the clips of the light pipe into the bottom of the AP-5131.

10. Fit the light pipe into hole in the tile from its unfinished side.

11. Place the decal on the back of the badge and slide the badge onto the light pipe from the

finished side of the tile.

12. Attach the radio antennae to their correct connectors.

2-19

CAUTION Both the Dual and Single Radio model AP-5131s use RSMA type

!

13. Attach safety wire (if used) to the AP-5131 safety wire tie point or security cable (if used) to

the AP-5131’s lock port.

14. Align the ceiling tile into its former ceiling space.

15. Cable the AP-5131 using either the Symbol power injector solution or an approved line cord

and power supply.

CAUTION Do not supply power to the AP-5131 until the cabling of the unit is

!

antenna connectors. On the Dual Radio AP-5131, a single dot on the
antenna connector indicates the primary antenna for both Radio 1 (2.4
GHz) and Radio 2 (5.2 GHz). Two dots designate the secondary
antenna for both Radio 1 and Radio 2. On Single Radio models, a
single dot on the antenna connector indicates the primary antenna for
Radio 1, and two dots designate the secondary antenna for Radio 1.

complete.

2-20

AP-5131 Access Point Product Reference Guide

For Symbol power injector installations:

a. Connect a RJ-45 Ethernet cable between the network data supply (host) and the Power

Injector Data In connector.

b. Connect a RJ-45 Ethernet cable between the power injector Data & Power Out

connector and the AP-5131 LAN port.

c. Ensure the cable length from the Ethernet source (host) to the power injector and

AP-5131 does not exceed 100 meters (333 ft). The power injector has no On/Off power
switch. The power injector receives power as soon as AC power is applied. For more
information on using the power injector, see Symbol Power Injector System on page 2-8.

For standard Symbol 48-Volt Power Adapter (Part No. 50-24000-050) and line cord
installations:

a. Connect RJ-45 Ethernet cable between the network data supply (host) and the AP-5131

LAN port.
b. Verify the power adapter is correctly rated according the country of operation.
c. Connect the power supply line cord to the power adapter.
d. Attach the power adapter cable into the power connector on the AP-5131.
e. Plug the power adapter into an outlet.

16. Verify the behavior of the AP-5131 LED lightpipe. For more information, see LED Indicators

on page 2-20.

17. Place the ceiling tile back in its frame and verify it is secure.

The AP-5131 is ready to configure. For information on an AP-5131 default configuration, see

Getting Started on page 3-1. For specific details on AP-5131 system configurations, see
System Configuration on page 4-1.

2.8 LED Indicators

The AP-5131 utilizes seven LED indicators. Five LEDs display within four LED slots on the front of the
AP-5131 (on top of the AP-5131 housing) and two LEDs (for above the ceiling installations) are located
on the back of the device (the side containing the LAN, WAN and antenna connectors).

Hardware Installation

D)

Power and Error Conditions (Split LE

Data Over Ethernet

802.11a Radio Activity

802.11b/g Radio Activity

The five LEDs on the top housing of the AP-5131 are clearly visible in table-top, wall and below ceiling
installations. The five AP-5131 top housing LEDs have the following display and functionality:

2-21

Power Status

Solid white indicates the AP-5131 is adequately powered.

Solid red indicates the AP-5131 is experiencing a problem condition requiring

Error Conditions

Ethernet Activity

immediate attention.

Flashing white indicates data transfers and Ethernet activity.

Flickering amber indicates beacons and data transfers over the AP-5131

802.11a Radio Activity

802.11b/g Radio
Activity

802.11a radio.

Flickering green indicates beacons and data transfers over the AP-5131

802.11b/g radio.

The LEDs on the rear of the AP-5131 are viewed using a single (customer installed) extended
lightpipe, adjusted as required to suit above the ceiling installations. The LEDs displayed using the
lightpipe have the following color display and functionality:

2-22

AP-5131 Access Point Product Reference Guide

Boot and Power Status

Error Conditions

Power and Error
Conditions

Solid white indicates the AP-5131 is adequately powered.

Solid red indicates the AP-5131 is experiencing a problem condition requiring
immediate attention.

Blinking red indicates the AP-5131 Rogue AP Detection feature has located a
rogue device

2.9 Setting Up MUs

For a discussion of how to initially test the AP-5131 to ensure it can interoperate with the MUs
intended for its operational environment, see Basic Device Configuration on page 3-5 and specifically

Testing Connectivity on page 3-13.

Refer to the LA-5030 & LA-5033 Wireless Networker PC Card and PCI Adapter Users Guide, available
from the Symbol Web site, for installing drivers and client software if operating in an 802.11a/g
network environment.

Refer to the Spectrum24 LA-4121 PC Card, LA-4123 PCI Adapter & LA-4137 Wireless Networker User
Guide, available from the Symbol Web site, for installing drivers and client software if operating in
an 802.11b network environment.

Use the default values for the ESSID and other configuration parameters until the network connection
is verified. MUs attach to the network and interact with the AP transparently.

Getting Started

The AP-5131 should be installed in an area tested for radio coverage using one of the site survey tools
available to the Symbol field service technician. Once an installation site has been identified, the
installer should carefully follow the hardware precautions, requirements, mounting guidelines and
power options outlined in Appendix 2, Hardware Installation on page 2-1.

See the following sections for more details:

• Installing the AP-5131

• Configuration Options

• Basic Device Configuration

3.1 Installing the AP-5131

Make the required cable and power connections before mounting the AP-5131 in its final operating
position. Test the AP-5131 with an associated MU before mounting and securing the AP-5131.
Carefully follow the mounting instructions in one of the following sections to ensure the AP-5131 is
installed correctly:

3-2

AP-5131 Access Point Product Reference Guide

• For instructions on installing the AP-5131 on a table top, see Desk Mounted Installations on

page 2-11.

• For instructions on AP-5131 wall mounting, see Wall Mounted Installations on page 2-13.

• For instructions on mounting an AP-5131 to a ceiling T-bar, see Suspended Ceiling T-Bar

Installations on page 2-15.

• For instructions on installing the AP-5131 in an above the ceiling attic space, see Above the

Ceiling (Plenum) Installations on page 2-17.

For information on the 802.11a and 802.11b/g radio antenna suite available to the AP-5131, see

Antenna Options on page 2-5. For more information on using a Symbol Power Injector to combine

Ethernet and power in one cable to the AP-5131, see Symbol Power Injector System on page 2-8. To
verify the behavior of the AP-5131 LEDs once installed, see LED Indicators on page 2-20.

3.2 Configuration Options

Once installed and powered, the AP-5131 can be configured using one of several connection
techniques. Managing the AP-5131 includes viewing network statistics and setting configuration
options. The AP-5131 requires one of the following connection methods to manage the network:

• Secure Java-Based WEB UI - (use Sun Microsystems’ JRE 1.5 or higher available from Sun’s
Web site. Disable Microsoft’s Java Virtual Machine if installed). For information on using the
Web UI to set AP-5131 default configuration values, see Basic Device Configuration on page

3-5 or chapters 4 through 7 of this guide.

• Command Line Interface (CLI) via Serial, Telnet and SSH. The AP-5131 CLI is accessed
through the AP-5131 RS232 port, via Telnet or SSH. The CLI follows the same configuration
conventions as the device user interface with a few documented exceptions. For details on
using the CLI to manage the AP-5131, see Appendix 8, Command Line Interface Reference

on page 8-1.

• Config file - Readable text file; Importable/Exportable via FTP, TFTP and HTTP. Configuration
settings for an AP-5131 can be downloaded from the current configuration of another AP­5131 meeting the import/export requirements. For information on importing or exporting
configuration files, see Importing/Exporting Configurations on page 4-37.

• MIB (Management Information Base) accessing the AP-5131 SNMP functions using a MIB
Browser. The AP-5131 CDROM contains the following 2 MIB files:

• Symbol-CC-WS2000-MIB-2.0 (standard Symbol MIB file)

• Symbol-AP-5131-MIB (AP-5131 specific MIB file)

Getting Started

3.3 Default Configuration Changes

The following table illustrates the changes made to the AP-5131 version 1.1 configuration as
compared to the 1.0 version configuration:

Version 1.0 Version 1.1

3-3

WAN DHCP client

Auto-Update Enabled

LAN 1 Static IP: 192.168.0.1

Static Mask: 255.255.255.0

DHCP Server Enabled

LAN 2 Not applicable in 1.0 release Static IP: 192.168.1.1

Access via WAN

port

HTTPS, SSH, SNMP: Enabled HTTP, HTTPS, SSH, SNMP, Telnet:

Static IP: 10.1.1.1

Static Mask: 255.0.0.0

DHCP Client

Auto-Update Enabled

Default Gateway

Ethernet Port Enabled

Static Mask: 255.255.255.0

DHCP Server Enabled

Enabled

3.4 Initially Connecting to the Access Point

NOTE The procedures described below assume this is the first time you are

connecting to the access point.

3.4.1 Connecting to the Access Point using the WAN Port

To initially connect to the AP-5131 using the access point’s WAN port:

1. Connect AC power to the AP-5131, as Power-Over-Ether support is not available on the WAN

port.

2. Start a browser and enter the AP-5131’s static IP WAN address (10.1.1.1). The default

password is “symbol.”

3. Refer to Basic Device Configuration on page 3-5 for instructions on the initial (basic)

configuration of the AP-5131.

3-4

AP-5131 Access Point Product Reference Guide

3.4.2 Connecting to the Access Point using the LAN Port

To initially connect to the AP-5131 using the access point’s LAN port:

1. The LAN port default is set to DHCP. Connect the AP-5131’s LAN port to a DHCP server.

The AP-5131 will receive its IP address automatically.

2. To view the AP-5131’s IP address, connect one end of a null modem serial cable to the
AP-5131 and the other end to the serial port of a computer running HyperTerminal or similar
emulation program.

3. Configure the following settings:

• Baud Rate - 19200

• Data Bits - 8

• Stop Bits - 1

• No Parity

• No Flow Control

4. Press <ESC> or <Enter> to access the AP-5131 CLI.

5. Enter the default username of “admin” and the default password of “symbol.”

As this is the first time you are logging into the AP-5131, you are prompted to enter a new
password and set the county code. Refer to Country Codes on page A-6 for a list of each
available countries two digit country code.

6. At the CLI prompt (admin>), type “summary.”

The AP-5131’s LAN IP address will display.

7. Using a Web browser, use the AP-5131’s IP address to access the AP-5131.

8. Refer to Basic Device Configuration on page 3-5 for instructions on the initial (basic)
configuration of the AP-5131.

Getting Started

3.5 Basic Device Configuration

For the basic setup described in this section, the Java-based Web UI will be used to configure the
AP-5131. Use the AP-5131’s LAN interface for establishing a link with the AP-5131. Configure the AP­5131 as a DHCP client. For optimal screen resolution, set your screen resolution to 1024 x 768 pixels
or greater.

1. Log in using admin as the default user ID and symbol as the default password. Use your

new password if it has been updated from default.

NOTE For optimum compatibility, use Sun Microsystems’ JRE 1.5 or higher

(available from Sun’s Website), and be sure to disable Microsoft’s Java
Virtual Machine if installed.

3-5

2. If the default login is successful, the Change Admin Password window displays. Change

the password.

3-6

AP-5131 Access Point Product Reference Guide

Enter the current password and a new admin password in fields provided, and click Apply.
Once the admin password has been updated, a warning message displays stating the AP­5131 must be set to a country.

The export function will always export the encrypted Admin User password. The import
function will import the Admin Password only if the AP-5131 is set to factory default. If the
AP-5131 is not configured to factory default settings, the Admin User password WILL NOT
get imported.

.

NOTE Though the AP-5131 can have its basic settings defined using a number of

different screens, Symbol recommends using the AP-5131 Quick Setup
screen to set the correct country of operation and define its minimum
required configuration from one convenient location.

3.5.1 Configuring Device Settings

Configure a set of minimum required device settings within the AP-5131 Quick Setup screen. The
values defined within the Quick Setup screen are also configurable in numerous other locations
within the AP-5131 menu tree. When you change the settings in the Quick Setup screen, the values
also change within the screen where these parameters also exist. Additionally, if the values are
updated in these other screens, the values initially set within the Quick Setup screen will be updated.

To define a basic AP-5131 configuration:

1. Select System Configuration -> Quick Setup from the AP-5131 menu tree, if the Quick
Setup screen is not already displayed.

Getting Started

3-7

2. Enter a System Name for the AP-5131.

The System Name is useful if multiple Symbol devices are being administered.

3. Select the Country for the AP-5131’s country of operation from the drop-down menu

The AP-5131 prompts the user for the correct country code on the first login. A warning
message also displays stating that an incorrect country settings may result in illegal radio
operation. Selecting the correct country is central to legally operating the AP-5131. Each
country has its own regulatory restrictions concerning electromagnetic emissions and the
maximum RF signal strength that can be transmitted. To ensure compliance with national
and local laws, be sure to set the Country accurately. CLI and MIB users cannot configure
their AP-5131 until a two character country code (for example, United States - us) is set.
Refer to Appendix A, Country Codes on page A-6 for the two character country codes.

NOTE The System Name and Country are also configurable within the System

Settings screen. Refer to Configuring System Settings on page 4-2 (if

necessary) to set a system location and admin email address for the
AP-5131 or to view other default settings.

3-8

AP-5131 Access Point Product Reference Guide

4. Optionally enter the IP address of the server used to provide system time to the AP-5131
within the Time Server field.

NOTE DNS names are not supported as a valid IP address. The user is required

to enter a numerical IP address.

Once the IP address is entered, the AP-5131’s Network Time Protocol (NTP) functionality is
engaged automatically. Refer to the AP-5131 Product Reference Guide for information on
defining alternate time servers and setting a synchronization interval for the AP-5131 to
adjust its displayed time. Refer to Configuring Network Time Protocol (NTP) on page 4-32 (if
necessary) for information on setting alternate time servers and setting a synchronization
interval for the AP-5131 to adjust its displayed time.

5. Click the WAN tab to set a minimum set of parameters for using the WAN interface.
a. Select the Enable WAN Interface checkbox to enable a connection between the

AP-5131 and a larger network or outside world through the WAN port. Disable this
option to effectively isolate the AP-5131’s WAN connection. No connections to a larger
network or the Internet will be possible. MUs cannot communicate beyond the
configured subnets.

b. Select the This Interface is a DHCP Client checkbox to enable DHCP for the AP-5131

WAN connection. This is useful, if the larger corporate network or Internet Service
Provider (ISP) uses DHCP. DHCP is a protocol that includes mechanisms for IP address
allocation and delivery of host-specific configuration parameters from a DHCP server to
a host. Some of these parameters are IP address, network mask, and gateway.

NOTE Symbol recommends that the WAN and LAN ports should not both be

configured as DHCP clients.

c. Specify an IP address for the AP-5131’s WAN connection. An IP address uses a series

of four numbers expressed in dot notation, for example, 190.188.12.1 (no DNS names
supported).

d. Specify a Subnet Mask for the AP-5131’s WAN connection. This number is available

from the ISP for a DSL or cable-modem connection, or from an administrator if the
AP-5131 connects to a larger network. A subnet mask uses a series of four numbers
expressed in dot notation. For example, 255.255.255.0 is a valid subnet mask.

Getting Started

e. Define a Default Gateway address for the AP-5131’s WAN connection. The ISP or a

network administrator provides this address.

f. Specify the address of a Primary DNS Server. The ISP or a network administrator

provides this address.

6. Optionally, use the Enable PPP over Ethernet checkbox to enable Point-to-Point over

Ethernet (PPPoE) for a high-speed connection that supports this protocol. Most DSL
providers are currently using or deploying this protocol. PPPoE is a data-link protocol for
dialup connections. PPPoE will allow the AP-5131 to use a broadband modem (DSL, cable
modem, etc.) for access to high-speed data networks.

a. Select the Keep Alive checkbox to enable occasional communications over the WAN

port even when client communications to the WAN are idle. Some ISPs terminate
inactive connections, while others do not. In either case, enabling Keep-Alive maintains
the WAN connection, even when there is no traffic. If the ISP drops the connection after
the idle time, the AP-5131 automatically reestablishes the connection to the ISP.

b. Specify a Username entered when connecting to the ISP. When the Internet session

begins, the ISP authenticates the username.

c. Specify a Password entered when connecting to the ISP. When the Internet session

starts, the ISP authenticates the password.

For additional AP-5131 WAN port configuration options, see Configuring WAN Settings on

page 5-14.

7. Click the LAN tab to set a minimum set of parameters to use the AP-5131 LAN interface.

a. Select the Enable LAN Interface checkbox to forward data traffic over the AP-5131

LAN connection. The LAN connection is enabled by default.

b. Use the This Interface drop-down menu to specify how network address information

is defined over the AP-5131’s LAN connection. Select DHCP Client if the larger
corporate network uses DHCP. DHCP is a protocol that includes mechanisms for IP
address allocation and delivery of host-specific configuration parameters from a DHCP
server to a host. Some of these parameters are IP address, network mask, and gateway.
Select DHCP Server to use the AP-5131 as a DHCP server over the LAN connection.
Select the Bootp client option to enable a diskless system to discover its own IP
address.

.

NOTE Symbol recommends that the WAN and LAN ports should not both be

configured as DHCP clients.

3-9

3-10

AP-5131 Access Point Product Reference Guide

c. If using the static or DHCP Server option, enter the network-assigned IP Address of the

AP-5131.

NOTE DNS names are not supported as a valid IP address for the AP-5131. The

user is required to enter a numerical IP address.

d. The Subnet Mask defines the size of the subnet. The first two sets of numbers specify

the network domain, the next set specifies the subset of hosts within a larger network.
These values help divide a network into subnetworks and simplify routing and data
transmission.

e. If using the static or DHCP Server option, enter a Default Gateway to define the

numerical IP address of a router the AP-5131 uses on the Ethernet as its default gateway.

f. If using the static or DHCP Server option, enter the Primary DNS Server numerical IP

address.

g. If using the DHCP Server option, use the Address Assignment Range parameter to

specify a range of IP address reserved for mapping clients to IP addresses. If a manually
(static) mapped IP address is within the IP address range specified, that IP address could
still be assigned to another client. To avoid this, ensure all statically mapped IP
addresses are outside of the IP address range assigned to the DHCP server.

For additional AP-5131 LAN port configuration options, see Configuring the LAN Interface

on page 5-1.

8. Enable the radio(s) using the Enable checkbox(es) within the Radio Configuration field. If
using a single radio AP-5131, enable the radio, then select either 2.4 GHz or 5.2 GHz from
the RF Band of Operation field. Only one RF band option at a time is permissible in a
single-radio AP-5131. If using a dual-radio AP-5131, the user can enable both RF bands. For
additional AP-5131 radio configuration options, see Configuring the 802.11a or 802.11b/g

Radio on page 5-48.

9. Select the WLAN #1 tab (WLANs 1 - 4 are available within the Quick Setup screen) to define
its ESSID and security scheme for basic operation.

NOTE A maximum of 16 WLANs are configurable within the AP-5131 Wireless

Configuration screen. The limitation of 16 WLANs exists regardless of
whether the AP-5131 is a single or dual-radio model.

Getting Started

a. Enter the Extended Services Set Identification (ESSID) and name associated with the

WLAN. For additional information on creating and editing up to 16 WLANs per AP-5131,
see Creating/Editing Individual WLANs on page 5-24.

b. Use the Available On checkboxes to define whether the target WLAN is operating over

the 802.11a or 802.11b/g radio. Ensure the radio selected has been enabled (see step 8).

c. Even an AP-5131 configured with minimal values must protect its data against theft and

corruption. A security policy should be configured for WLAN1 as part of the basic
configuration outlined in this guide. A security policy can be configured for the WLAN
from within the Quick Setup screen. Policies can be defined over time and saved to be
used as needed as the AP-5131’s security requirements change. Symbol recommends
you familiarize yourself with the security options available on the AP-5131 before
defining a security policy. Refer to Configuring WLAN Security Settings on page 3-11.

10. Click Apply to save any changes to the AP-5131 Quick Setup screen. Navigating away from

the screen without clicking Apply results in all changes to the screens being lost.

11. Click Undo Changes (if necessary) to undo any changes made. Undo Changes reverts the

settings displayed on the AP-5131 Quick Setup screen to the last saved configuration.

3.5.1.1 Configuring WLAN Security Settings

3-11

To configure a basic security policy for a WLAN:

1. From the AP-5131 Quick Setup screen, click the Create button to the right of the Security

Policy item.

The New Security Policy screen displays with the Manually Pre-shared key/No

authentication and No Encryption options selected. Naming and saving such a policy (as

is) would provide no security and might only make sense in a guest network wherein no
sensitive data is either transmitted or received. Consequently, at a minimum, a basic
security scheme (in this case WEP 128) is recommended in a network environment wherein
sensitive data is transmitted.

NOTE For information on configuring the other encryption and authentication

options available to the AP-5131, see Configuring Security Options on

page 6-2.

2. Ensure the

Name of the security policy entered suits the intended configuration or function

of the policy.

3-12

AP-5131 Access Point Product Reference Guide

Multiple WLANs can share the same security policy, so be careful not to name security
policies after specific WLANs or risk defining a WLAN to single policy. Symbol recommends
naming the policy after the attributes of the authentication or encryption type selected.

3. Select the WEP 128 (104 bit key) checkbox.

The WEP 128 Settings field displays within the New Security Policy screen.

4. Configure the WEP 128 Settings field as required to define the Pass Key used to generate
the WEP keys

Pass Key Specify a 4 to 32 character pass key and click the Generate

.

button. The AP-5131, other proprietary routers and Symbol MUs
use the same algorithm to convert an ASCII string to the same
hexadecimal number. Non-Symbol clients and devices need to
enter WEP keys manually as hexadecimal numbers. The AP-5131
and its target client(s) must use the same pass key to
interoperate.

Getting Started

Keys #1-4 Use the Key #1-4 fields to specify key numbers. The key can be

either a hexidecimal or ASCII depending on which option is
selected from the drop-down menu. For WEP 64 (40-bit key), the
keys are 10 hexadecimal characters in length or 5 ASCII
characters. For WEP 128 (104-bit key), the keys are 26
hexadecimal characters in length or 13 ASCII characters. Select
one of these keys for activation by clicking its radio button. The
AP-5131 and its target client(s) must use the same key to
interoperate.

5. Click the Apply button to save the security policy and return to the AP-5131 Quick Setup

screen.

At this point, you can test the AP-5131 for MU interoperability.

3.5.2 Testing Connectivity

Verify the AP-5131’s link with an MU by sending Wireless Network Management Protocol (WNMP)
ping packets to the associated MU. Use the Echo Test screen to specify a target MU and configure
the parameters of the test. The WNMP ping test only works with Symbol MUs. Only use a Symbol
MU to test AP-5131 connectivity using WNMP.

3-13

NOTE Before testing for connectivity, the target MU needs to be set to the same

ESSID as the AP-5131. Since WEP 128 has been configured for the AP­5131, the MU also needs to be configured for WEP 128 and use the same
WEP keys. Ensure the MU is associated with the AP-5131 before testing
for connectivity.

To ping a specific MU to assess its connection with an AP-5131:

1. Select Status and Statistics -> MU Stats from the AP-5131 menu tree.

2. Select the Echo Test button from within the MU Stats Summary screen.

3. Define the following parameters for the test.

Station Address The station address is the IP address of the target MU. Refer to

the MU Stats Summary screen for associated MU IP address
information.

Number of pings Defines the number of packets to be transmitted to the MU. The

default is 100.

3-14

AP-5131 Access Point Product Reference Guide

Packet Length Specifies the length of each packet transmitted to the MU during

the test. The default length is 100 bytes.

4. Click the Ping button to begin transmitting packets to the specified MU address.

Refer to the Number of Responses value to assess the number of responses from the MU
versus the number of ping packets transmitted by the AP-5131. Use the ratio of packets sent
versus the number of packets received the link quality between the MU and the AP-5131.

Click the OK button to exit the Echo Test screen and return to the MU Stats Summary screen.

3.5.3 Where to Go from Here?

Once basic connectivity has been verified, the AP-5131 can be fully configured to meet the needs of
the network and the users it supports. Refer to the following:

• For detailed information on AP-5131 device access, SNMP settings, network time,
importing/exporting device configurations and device firmware updates, see Chapter 4,

System Configuration on page 4-1.

• For detailed information on configuring AP-5131 LAN interface (subnet) and WAN interface
see, Chapter 5, Network Management on page 5-1.

• For detailed information on configuring specific encryption and authentication security
schemes for individual AP-5131 WLANs, see Chapter 6, Configuring Access Point Security

on page 6-1.

• To view detailed statistics on the AP-5131 and its associated MUs, see Chapter 7,

Monitoring Statistics on page 7-1.

System Configuration

The Symbol AP-5131 contains a built-in browser interface for system configuration and remote
management using a standard Web browser such as Microsoft Internet Explorer, Netscape Navigator
or Mozilla Firefox. The browser interface also allows for system monitoring of the AP-5131.

Web management of the AP-5131 requires either Microsoft Internet Explorer 5.0 or later or Netscape
Navigator 6.0 or later.

NOTE For optimum compatibility, use Sun Microsystems’ JRE 1.5 or higher

(available from Sun’s Web site), and be sure to disable Microsoft’s Java
Virtual Machine if installed.

To connect to the AP, the AP-5131 IP is required. If connected to the AP-5131 using the WAN port, the
default static IP address is 10.1.1.1. The default password is “symbol.” If connected to the AP-5131
using the LAN port, the default setting is DHCP client. The user is must know the IP address in order
to access the AP-5131 using a Web browser.

4-2

AP-5131 Access Point Product Reference Guide

.

NOTE DNS names are not supported as a valid IP address for the AP-5131. The

user is required to enter a numerical IP address.

System configuration topics include:

• Configuring System Settings

• Configuring Data Access

• Managing Certificate Authority (CA) Certificates

• Configuring SNMP Settings

• Configuring Network Time Protocol (NTP)

• Logging Configuration

• Importing/Exporting Configurations

• Updating Device Firmware

4.1 Configuring System Settings

Use the System Settings screen to specify the name and location of the AP-5131, assign an email
address for the network administrator, restore the AP’s default configuration or restart the AP.

To configure System Settings for the AP-5131:

1. Select System Configuration -> System Settings from the AP-5131 menu tree.

System Configuration

2. Configure the AP-5131 System Settings field to assign a system name and location, set the

country of operation and view device version information.

4-3

System Name Specify a device name for the AP-5131. Symbol recommends

selecting a name serving as a reminder of the user base the

AP-5131 supports (engineering, retail, etc.).

System Location Enter the location of the

parameter acts as a reminder of where the AP can be found. Use
the System Name field as a specific identifier of device location.
Use the System Name and System Location fields together to
optionally define the AP name by the radio coverage it supports and
specific physical location. For example, “second floor engineering”

Admin Email Address Specify the AP administrator's email address.

AP-5131. The System Location

4-4

AP-5131 Access Point Product Reference Guide

Country The AP-5131 prompts the user for the correct country code after

AP-5131 Version The displayed number is the current version of the AP-5131 device

the first login. A warning message also displays stating that an
incorrect country setting will lead to an illegal use of the AP-5131.
Use the pull-down menu to select the country of operation.
Selecting the correct country is extremely important. Each country
has its own regulatory restrictions concerning electromagnetic
emissions (channel range) and the maximum RF signal strength
transmitted. To ensure compliance with national and local laws, be
sure to set the Country field correctly.

If using the

AP-5131 configuration file, CLI or MIB to configure the

AP-5131’s country code, see Country Codes on page A-6.

firmware. Use this information to determine if the AP is running the
most recent firmware available from Symbol. Use the Firmware

Update screen to keep the AP’s firmware up to date. For more

information, see Updating Device Firmware on page 4-41.

System Uptime Displays the current uptime of the

Name field. System Uptime is the cumulative time since the

AP-5131 defined in the System

AP-5131 was last rebooted or lost power.

Serial Number Displays the AP-5131 Media Access Control (MAC) address. The

AP-5131 MAC address is hard coded at the factory and cannot be
modified. The LAN and WAN port MAC addresses can be located
within the LAN and WAN Stats screens. For information on
locating the AP-5131 MAC addresses, see Viewing WAN Statistics

on page 7-2 and Viewing LAN Statistics on page 7-6.

3. Refer to the Factory Defaults field to restore either a full or partial default configuration.

CAUTION Restoring the AP-5131’s configuration back to default settings

!

changes the administrative password back to “symbol.” If restoring
the configuration back to default settings, be sure you change the
administrative password accordingly.

System Configuration

4-5

Restore Default
Configuration

Restore Partial
Default Configuration

Select the Restore Default Configuration button to reset the
AP’s configuration to factory default settings. If selected, a
message displays warning the user the current configuration will
be lost if the default configuration is restored. Before using this
feature, Symbol recommends using the Config Import/Export
screen to export the current configuration for safekeeping, see

Importing/Exporting Configurations on page 4-37.

Select the Restore Partial Default Configuration button to
restore a default configuration with the exception of the current
LAN, WAN, SNMP settings and IP address used to launch the
browser. If selected, a message displays warning the user all
current configuration settings will be lost with the exception of
WAN and SNMP settings. Before using this feature, Symbol
recommends using the Config Import/Export screen to export the
current configuration for safekeeping, see Importing/Exporting

Configurations on page 4-37.

4. Use the Restart AP-5131 field to restart the AP (if necessary).

Restart

AP-5131

Click the Restart AP-5131 button to reboot the AP. Restarting the

AP-5131 resets all data collection values to zero. Symbol does not

recommend restarting the AP during significant system uptime or
data collection activities.

CAUTION After a reboot, static route entries disappear from the AP Route Table

!

if a LAN Interface is set to DHCP Client. The entries can be retrieved
(once the reboot is done) by performing an Apply operation from the
WEB UI or a save operation from the CLI.

5. Click Apply to save any changes to the System Settings screen. Navigating away from the

screen without clicking the Apply button results in all changes to the screen being lost.

NOTE The Apply button is not needed for restoring the AP-5131 default

configuration or restarting the AP-5131.

6. Click Undo Changes (if necessary) to undo any changes made. Undo Changes reverts the

settings displayed on the System Settings screen to the last saved configuration.

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AP-5131 Access Point Product Reference Guide

7. Click Logout to securely exit the AP-5131 Symbol Access Point applet. A prompt displays
confirming the logout before the applet is closed.

4.2 Configuring Data Access

Use the AP-5131 Access screen to enable/disable data throughput to the AP-5131’s LAN1, LAN2
and/or WAN interfaces and display screens for changing administrator passwords.

Use the AP-5131 Access screen checkboxes to enable or disable LAN1, LAN2 and/or WAN access
using the protocols and ports listed. If access is disabled, this effectively locks out the administrator
from configuring the AP-5131 using that interface. To avoid jeopardizing the network data managed
by the AP-5131, Symbol recommends enabling only those interfaces used in the routine (daily)
management of the network, and disabling all other interfaces until they are required.

To configure access for the AP-5131:

1. Select System Configuration -> AP-5131 Access from the AP-5131 menu tree.

2. Use the AP-5131 Access field checkboxes to enable/disable the following AP-5131 on the
AP-5131’s LAN1, LAN2 or WAN interfaces:

System Configuration

Applet HTTP (port 80) Select the LAN1, LAN2 and/or WAN checkboxes to enable access

to the

AP-5131 configuration applet using a Web browser.

4-7

Applet HTTPS (port

443)

CLI TELNET (port 23)

CLI SSH (port 22) Select the LAN1, LAN2 and/or WAN checkboxes to enable access

SNMP (port 161) Select the LAN1, LAN2 and/or WAN checkboxes to enable access

Select the LAN1, LAN2 and/or WAN checkboxes to enable access
to the

AP-5131 configuration applet using a Secure Sockets Layer

(SSL) for encrypted HTTP sessions.

Select the LAN1, LAN2 and/or WAN checkboxes to enable access
to the

AP-5131 CLI via the TELNET terminal emulation TCP/IP

protocol.

to the

AP-5131 CLI using the SSH (Secure Shell) protocol.

to the

AP-5131 configuration settings from an SNMP-capable

client.

3. Refer to the Applet Timeout field to set an HTTPS timeout interval.

HTTP/S Timeout

Disables access to the AP-5131 if no data activity is detected over
Applet HTTPS (port 443) after the user defined interval. Default is
0 Mins.

4. Configure the Secure Shell field to set timeout values to reduce network inactivity.

Authentication
Timeout

Defines the maximum time (between 30 - 120 seconds) allowed for
SSH authentication to occur before executing a timeout. The
minimum permissible value is 30 seconds.

SSH Keepalive
Interval

The SSH Keepalive Interval defines a period (in seconds) after
which if no data has been received from a client, SSH sends a
message through the encrypted channel to request a response from
the client. The default is 0, and no messages will be sent to the
client until a non-zero value is set. Defining a Keepalive interval is
important, otherwise programs running on a server may never
notice if the other end of a connection is rebooted.

5. Use the Admin Authentication buttons to specify the authentication server connection

method.

The

Local

AP-5131 verifies the authentication connection.

4-8

AP-5131 Access Point Product Reference Guide

Radius Designates that a Radius server is used in the authentication

6. Use the Radius Server if a Radius server has been selected as the authentication server,
enter the required network address information.

credential verification. If using this option, the connected PC is
required to have its Radius credentials verified with an external
Radius server. Additionally, the Radius Server’s Active Directory
should have a valid user configured and have a PAP based Remote
Access Policy configured for Radius Admin Authentication to work.

Radius Server IP Specify the

Authentication Dial-In User Service (Radius) server. Radius is a

client/server protocol and software enabling remote-access
servers to communicate with a server used to authenticate users
and authorize access to the requested system or service.

Port Specify the port on which the server is listening. The Radius server

typically listens on ports 1812 (default port).

Shared Secret Define a shared secret for authentication on the server. The shared

secret is required to be the same as the shared secret defined on
the Radius server. Use shared secrets to verify Radius messages
(with the exception of the Access-Request message) sent by a
Radius-enabled device configured with the same shared secret.

Apply the qualifications of a well-chosen password to the
generation of a shared secret. Generate a random, case-sensitive
string using letters, numbers and symbols. The default is symbol.

numerical (non DNS name) IP address of the Remote

7. Update the Administrator Access field to change the administrative password used to
access the AP-5131 configuration settings.

Change Admin
Password

Click the
for updating the AP administrator password. Enter and confirm a
new administrator password as required.

Change Admin Password button to display a screen

8. Click Apply to save any changes to the AP-5131 Access screen. Navigating away from the
screen without clicking the Apply button results in all changes to the screen being lost.

9. Click Undo Changes (if necessary) to undo any changes made. Undo Changes reverts the
settings displayed on the AP-5131 Access screen to the last saved configuration.

10. Click Logout to securely exit the AP-5131 Symbol Access Point applet. A prompt displays
confirming the logout before the applet is closed.

System Configuration

4.3 Managing Certificate Authority (CA) Certificates

Certificate management includes the following sections:

• Importing a CA Certificate

• Creating Self Certificates for Accessing the VPN

4.3.1 Importing a CA Certificate

A certificate authority (CA) is a network authority that issues and manages security credentials and
public keys for message encryption. The CA signs all digital certificates that it issues with its own
private key. The corresponding public key is contained within the certificate and is called a CA
certificate. A browser must contain this CA certificate in its Trusted Root Library so that it can trust
certificates “signed” by the CA's private key.

Depending on the public key infrastructure, the digital certificate includes the owner's public key, the
certificate expiration date, the owner's name and other public key owner information.

The AP-5131 can import and maintain a set of CA certificates to use as an authentication option for
Virtual Private Network (VPN) access. To use the certificate for a VPN tunnel, define a tunnel and
select the IKE settings to use either RSA or DES certificates. For additional information on configuring
VPN tunnels, see Configuring VPN Tunnels on page 6-34.

4-9

CAUTION Loaded and signed CA certificates will be lost when changing the

AP-5131’s firmware version using either the GUI or CLI. After a

!

Refer to your AP-5131 network administrator to obtain a CA certificate to import into the AP-5131.

NOTE Verify the AP-5131 device time is synchronized with an NTP server before

To import a CA certificate:

1. Select System Configuration -> Certificate Mgmt -> CA Certificates from the AP-5131

menu tree.

certificate has been successfully loaded, export it to a secure location
to ensure its availability after a firmware update.

importing a certificate to avoid issues with conflicting date/time stamps.
For more information, see Configuring Network Time Protocol (NTP) on

page 4-32.

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AP-5131 Access Point Product Reference Guide

2. Copy the content of the CA Certificate message (using a text editor such as notepad) and
then click on Paste from Clipboard.

The content of the certificate displays in the Import a root CA Certificate field.

3. Click the Import root CA Certificate button to import it into the CA Certificate list.

4. Once in the list, select the certificate ID within the View Imported root CA Certificates
field to view the certificate issuer name, subject, and certificate expiration data.

5. To delete a certificate, select the Id from the drop-down menu and click the Del button.

4.3.2 Creating Self Certificates for Accessing the VPN

The AP-5131 requires two kinds of certificates for accessing the VPN, CA certificates and self
certificates. Self certificates are certificate requests you create, send to a Certificate Authority (CA)
to be signed, then import the signed certificate into the management system.

CAUTION Self certificates can only be generated using the AP-5131 GUI and CLI

interfaces. No functionality exists for creating a self-certificate using

!

the AP-5131’s SNMP configuration option.

System Configuration

To create a self certificate:

1. Select System Configuration -> Certificate Mgmt -> Self Certificates from the AP-5131

menu tree.

2. Click on the Add button to create the certificate request.

4-11

The Certificate Request screen displays.

3. Complete the request form with the pertinent information. Only 4 values are required, the

others optional:

Key ID Enter a logical name for the certificate to help distinguish between

certificates. The name can be up to 7 characters in length.

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AP-5131 Access Point Product Reference Guide

Subject The required Subject value contains important information about

Signature Algorithm Use the drop-down menu to select the signature algorithm used for

Key Length Defines the length of the key. Possible values are 512, 1024, and

4. When the form is completed, click the Generate button.

The Certificate Request screen disappears and the ID of the generated certificate request
displays in the drop-down list of certificates within the Self Certificates screen.

5. Click the Generate Request button.

the certificate. Contact the CA signing the certificate to determine
the content of the Subject parameter.

the certificate. Options include:

• MD5-RSA - Message Digest 5 algorithm in combination with
RSA encryption.

• SHA1-RSA - Secure Hash Algorithm 1 in combination with
RSA encryption.

2048.

The generated certificate request displays in Self Certificates screen text box.

System Configuration

6. Click the Copy to Clipboard button.

The content of certificate request is copied to the clipboard.

Create an email to your CA, paste the content of the request into the body of the message
and send it to the CA.

The CA signs the certificate and will send it back. Once received, copy the content from the
email into the clipboard.

7. Click the Paste from clipboard button.

The content of the email displays in the window.

Click the Load Certificate button to import the certificate and make it available for use as
a VPN authentication option. The certificate ID displays in the Signed list.

NOTE If the AP-5131 is restarted after a certificate request has been generated

but before the signed certificate is imported, the import will not execute
properly. Do not restart the AP-5131 during this process.

8. To use the certificate for a VPN tunnel, first define a tunnel and select the IKE settings to
use either RSA or DES certificates. For additional information on configuring VPN tunnels,
see Configuring VPN Tunnels on page 6-34.

4-13

4.3.3 Creating a Certificate for Onboard Radius Authentication

The AP-5131 can use its on-board Radius Server to generate certificates to authenticate MUs for use
with the AP-5131. In addition, a Windows 2000 or 2003 Server is used to sign the certificate before
downloading it back to the AP-5131’s on-board Radius server and loading the certificate for use with
the AP-5131.

Both a CA and Self certificate are required for Onboard Radius Authentication. For information on CA
Certificates, see Importing a CA Certificate on page 4-9
Encoded format

!

To create a self certificate for on-board Radius authentication:

or risk loading an invalid certificate.

CAUTION Self certificates can only be generated using the AP-5131 GUI and CLI

interfaces. No functionality exists for creating a self-certificate using
the AP-5131’s SNMP configuration option.

. Ensure the certificate is in a Base 64

4-14

AP-5131 Access Point Product Reference Guide

1. Select System Configuration -> Certificate Mgmt -> Self Certificates from the AP-5131

menu tree.

2. Click on the Add button to create the certificate request.

The Certificate Request screen displays.

3. Complete the request form with the pertinent information.

Key ID (required) Enter a logical name for the certificate to help distinguish between

certificates. The name can be up to 7 characters in length.

Subject (required) The required

the certificate. Contact the CA signing the certificate to determine
the content of the Subject parameter.

Department Optionally enter a value for your organizations’s department name

if needing to differentiate the certificate from similar certificates
used in other departments within your organization.

Organization Optionally enter the name of your organization for supporting

information for the certificate request.

City Optionally enter the name of the City where the AP-5131(using the

certificate) resides.

State Optionally enter the name of the State where the AP-5131(using

the certificate) resides.

Postal Code Optionally enter the name of the Postal (Zip) Code where the

AP-5131(using the certificate) resides.

Country Code Optionally enter the AP-5131’s Country Code.

Email Enter a organizational email address (avoid using a personal

address if possible) to associate the request with the proper
requesting organization.

Domain Name Ensure the Domain name is the name of the CA Server. This value

must be set correctly to ensure the certificate is properly
generated.

Subject value contains important information about

IP Address Enter the IP address of this AP-5131 (as you are using the AP-5131’s

onbard Radius server).

System Configuration

Signature Algorithm Use the drop-down menu to select the signature algorithm used for

the certificate. Options include:

• MD5-RSA - Message Digest 5 algorithm in combination with
RSA encryption.

• SHA1-RSA - Secure Hash Algorithm 1 in combination with
RSA encryption.

Key Length Defines the length of the key. Possible values are 512, 1024, and

2048. Symbol recommends setting this value to 1024 to ensure
optimum functionality.

4. Complete as many of the optional values within the Certificate Request screen as

possible.

5. When the form is completed, click the Generate button from within the Certificate Request

screen.

The Certificate Request screen disappears and the ID of the generated certificate request
displays in the drop-down list of certificates within the Self Certificates screen.

NOTE A Warning screen may display at this phase stating key information could

be lost if you proceed with the certificate request. Click the OK button to
continue, as the certificate has not been signed yet.

4-15

6. Click the Generate Request button from within the Self Certificates screen. The certificate

content displays within the Self Certificate screen.

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AP-5131 Access Point Product Reference Guide

7. Click the Copy to clipboard button. Save the certificate content to a secure location.

8. Connect to the Windows 2000 or 2003 server used to sign the certificate.

9. Select the Request a certificate option. Click Next to continue.

10. Select the Advanced request checkbox from within the Choose Request Type screen and

click Next to continue.

11. From within the Advanced Certificate Requests screen, select the Submit a certificate

request using a base 64 encoded PKCS #10 file or a renewal request using a
base64 encoded PKCS file option. Click Next to continue.

12. Paste the content of certificate in the Saved Request field (within the Submit a Saved

Request screen).

NOTE An administrator must make sure the Web Server option is available as a

selectable option for those without administrative privileges.

If you do not have administrative privileges, ensure the Web Server option has been
selected from the Certificate Template drop-down menu. Click Submit.

13. Select the Base 64 encoded checkbox option from within the Certificate Issued screen and
select the Download CA Certificate link.

System Configuration

A File Download screen displays prompting the user to select the download location for
the certificate.

14. Click the Save button and save the certificate to a secure location.

15. Load the certificates on the AP-5131

CAUTION Ensure the CA Certificate is loaded before the Self Certificate, or risk

!

16. Open the certificate file and copy its contents into the CA Certificates screen by clicking the

Paste from Clipboard button.

The certificate is now ready to be loaded into the AP-5131’s flash memory.

17. Click the Import root CA Certificate button from within the CA Certificates screen.

18. Verify the contents of the certificate file display correctly within the CA Certificates screen.

19. Open the certificate file and copy its contents into the Self Certificates screen by clicking

the Paste from Clipboard button.

20. Click the Load Certificate button.

21. Verify the contents of the certificate file display correctly within the Self Certificates screen.

The certificate for the onboard Radius authentication of MUs has now been generated and
loaded into the AP-5131’s flash memory.

an invalid certificate load.

.

4-17

4.4 Configuring SNMP Settings

Simple Network Management Protocol (SNMP) facilitates the exchange of management information
between network devices. SNMP uses Management Information Bases (MIBs) to manage the device
configuration and monitor Internet devices in potentially remote locations. MIB information accessed
via SNMP is defined by a set of managed objects called object identifiers (OIDs). An object identifier
(OID) is used to uniquely identify each object variable of a MIB. The AP-5131 CDROM contains the
following 2 MIB files:

• Symbol-CC-WS2000-MIB-2.0 (common Symbol MIB file)

• Symbol-AP-5131-MIB (AP-5131 specific MIB file)

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AP-5131 Access Point Product Reference Guide

NOTE The Symbol-AP-5131-MIB contains the majority of the information

contained within the Symbol-CC-WS2000-MIB-2.0 file. This feature rich
information has been validated with the Symbol WS2000 and proven
reliable. The remaining portion of the Symbol-AP-5131-MIB contains
supplemental information unique to the AP-5131 feature set.

If using the Symbol-CC-WS2000-MIB-2.0 and/or Symbol-AP-5131-MIB to configure the AP-5131, use
the table below to locate the MIB where the feature can be configured.

Feature MIB Feature MIB

LAN Configuration Symbol-AP-5131-MIB Subnet Configuration Symbol-CC-WS2000-MIB-2.0

VLAN Configuration Symbol-AP-5131-MIB DHCP Server

Configuration

802.1x Port
Authentication

Ethernet Type Filter
Configuration

Wireless
Configuration

Security Configuration Symbol-AP-5131-MIB NAT Address Mapping Symbol-CC-WS2000-MIB-2.0

MU ACL Configuration Symbol-AP-5131-MIB VPN Tunnel

QOS Configuration Symbol-AP-5131-MIB VPN Tunnel status Symbol-CC-WS2000-MIB-2.0

Radio Configuration Symbol-AP-5131-MIB Content Filtering Symbol-CC-WS2000-MIB-2.0

Bandwidth
Management

SNMP Trap Selection Symbol-AP-5131-MIB Firewall Configuration Symbol-CC-WS2000-MIB-2.0

SNMP RF Trap
Thresholds

Config Import/Export Symbol-AP-5131-MIB Advanced LAN Access Symbol-CC-WS2000-MIB-2.0

Symbol-AP-5131-MIB Advanced DHCP

Server configuration

Symbol-AP-5131-MIB WAN IP Configuration Symbol-CC-WS2000-MIB-2.0

Symbol-AP-5131-MIB PPP Over Ethernet Symbol-CC-WS2000-MIB-2.0

Configuration

Symbol-AP-5131-MIB Rogue AP Detection Symbol-CC-WS2000-MIB-2.0

Symbol-AP-5131-MIB LAN to WAN Access Symbol-CC-WS2000-MIB-2.0

Symbol-CC-WS2000-MIB-2.0

Symbol-CC-WS2000-MIB-2.0

Symbol-CC-WS2000-MIB-2.0

MU Authentication
Stats

Symbol-AP-5131-MIB Router Configuration Symbol-CC-WS2000-MIB-2.0

System Configuration

Feature MIB Feature MIB

4-19

WNMP Ping
Configuration

Known AP Stats Symbol-AP-5131-MIB AP 5131 Access Symbol-CC-WS2000-MIB-2.0

Flash LEDs Symbol-AP-5131-MIB Certificate Mgt Symbol-CC-WS2000-MIB-2.0

Automatic Update Symbol-AP-5131-MIB SNMP Access

Symbol-AP-5131-MIB System Settings Symbol-CC-WS2000-MIB-2.0

Symbol-CC-WS2000-MIB-2.0

Configuration

SNMP Trap
Configuration

NTP Server
Configuration

Logging Configuration Symbol-CC-WS2000-MIB-2.0

Firmware Update Symbol-CC-WS2000-MIB-2.0

Wireless Stats Symbol-CC-WS2000-MIB-2.0

Radio Stats Symbol-CC-WS2000-MIB-2.0

MU Stats Symbol-CC-WS2000-MIB-2.0

Automatic Update Symbol-CC-WS2000-MIB-2.0

Symbol-CC-WS2000-MIB-2.0

Symbol-CC-WS2000-MIB-2.0

SNMP allows a network administrator to manage network performance, find and solve network
problems, and plan for network growth. The AP-5131 supports SNMP management functions for
gathering information from its network components, communicating that information to specified
users and configuring the AP-5131. All the fields available within the AP-5131 are also configurable
within the MIB.

The AP-5131 SNMP agent functions as a command responder and is a multilingual agent responding
to SNMPv1, v2c and v3 managers (command generators). The factory default configuration maintains
SNMPv1/2c support of the community names, hence providing backward compatibility.

SNMP v1/v2c community definitions and SNMP v3 user definitions work independently, and both use
the Access Control List (ACL) of the SNMP Access Control sub-screen.

Use the SNMP Access screen to define SNMP v1/v2c community definitions and SNMP v3 user
definitions. SNMP version 1 (v1) provides a strong network management system, but its security is
relatively weak. The improvements in SNMP version 2c (v2c) do not include the attempted security
enhancements of other version-2 protocols. Instead, SNMP v2c defaults to SNMP-standard

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AP-5131 Access Point Product Reference Guide

community strings for read-only and read/write access. SNMP version 3 (v3) further enhances
protocol features, providing much improved security. SNMP v3 encrypts transmissions and provides
authentication for users generating requests.

To configure SNMP v1/v2c community definitions and SNMP v3 user definitions for the AP-5131:

1. Select System Configuration - > SNMP Access from the AP-5131 menu tree.

SNMP v1/v2c community definitions allow read-only or read/write access to AP-5131
management information. The SNMP community includes users whose IP addresses are
specified on the SNMP Access Control screen.

A read-only community string allows a remote device to retrieve information, while a read/
write community string allows a remote device to modify settings. Symbol recommends
considering adding a community definition using a site-appropriate name and access level.
Set up a read/write definition (at a minimum) to facilitate full access by the AP-5131
administrator.

2. Configure the SNMP v1/v2 Configuration field (if SNMP v1/v2 is used) to add or delete
community definitions, name the community, specify the OID and define community access.

Add Click Add to create a new SNMP v1/v2c community definition.

System Configuration

Delete Select Delete to remove a SNMP v1/v2c community definition.

4-21

Community

OID Use the OID (Object Identifier) pull-down list to specify a setting of

Access Use the Access pull-down list to specify read-only (R) access or

Use the Community field to specify a site-appropriate name for
the community. The name is required to match the name used
within the remote network management software.

All or a enter a Custom OID. Select All to assign the user access to
all OIDs in the MIB. The OID field uses numbers expressed in dot
notation.

read/write (RW) access for the community. Read-only access
allows a remote device to retrieve AP-5131 information, while
read/write access allows a remote device to modify AP-5131
settings.

3. Configure the SNMP v3 User Definitions field (if SNMP v3 is used) to add and configure

SNMP v3 user definitions.

SNMP v3 user definitions allow read-only or read/write access to management information
as appropriate.

Add

Delete Select Delete to remove an entry for an SNMP v3 user.

Username

Click Add to create a new entry for an SNMP v3 user.

Specify a username by typing an alphanumeric string of up to 31
characters.

Security Level Use the Security Level area to specify a security level of noAuth

(no authorization), AuthNoPriv (authorization without privacy), or
AuthPriv (authorization with privacy).

The NoAuth setting specifies no login authorization or encryption
for the user.

The AuthNoPriv setting requires login authorization, but no
encryption.

The AuthPriv setting requires login authorization and uses the

Data Encryption Standard (DES) protocol.

OID Use the OID (Object Identifier) area to specify a setting of All or

enter a Custom OID. Select All to assign the user access to all OIDs
in the MIB. The OID field uses numbers expressed in dot notation.

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AP-5131 Access Point Product Reference Guide

Passwords Select Passwords to display the Password Settings screen for

Access Use the Access pull-down list to specify read-only (R) access or

4. Specify the users who can read and optionally modify the SNMP-capable client.

SNMP Access Control Click the SNMP Access Control button to display the SNMP

specifying authentication and password settings for an SNMP v3
user. The maximum password length is 11 characters. Use the

Authentication Algorithm drop-down menu to specify MD5 or
SHA1 as the authentication algorithm. Use the Privacy Algorithm

drop-down menu to define an algorithm of DES or AES-128bit.
When entering the same username on the SNMP Traps and

SNMP Access screens, the password entered on the SNMP Traps

page overwrites the password entered on the SNMP Access page.
To avoid this problem, enter the same password on both pages.

read/write (RW) access for a user. Read-only access permits a user
to retrieve
user to modify

Access Control screen for specifying which users can read

SNMP-generated information and potentially modify related
settings from an SNMP-capable client.

The SNMP Access Control screen's Access Control List (ACL) uses
Internet Protocol (IP) addresses to restrict access to the AP’s SNMP
interface. The ACL applies to both SNMP v3 user definitions and
SNMP v1/v2c community definitions.

For detailed instructions of configuring SNMP user access and
modification privileges, see Configuring SNMP Access Control on

page 4-23.

AP-5131 information, while read/write access allows a

AP-5131settings.

5. If configuring SNMP v3 user definitions, set the SNMP v3 engine ID.

AP-5131 SNMP v3

Engine ID

The AP-5131 SNMP v3 Engine ID field lists the unique SNMP v3
Engine ID for the
source for a trap, response or report. It is also used as the
destination ID when sending get, getnext, getbulk, set or inform
commands.

AP-5131. This ID is used in SNMP v3 as the

6. Click Apply to save any changes to the SNMP Access screen. Navigating away from the
screen without clicking the Apply button results in all changes to the screen being lost.

System Configuration

7. Click Undo Changes (if necessary) to undo any changes made. Undo Changes reverts the

settings displayed on the SNMP Access screen to the last saved configuration.

8. Click Logout to securely exit the AP-5131 Symbol Access Point applet. A prompt displays

confirming the logout before the applet is closed.

For additional SNMP configuration information, see:

• Configuring SNMP Access Control

• Enabling SNMP Traps

• Configuring Specific SNMP Traps

• Configuring SNMP RF Trap Thresholds

4.4.1 Configuring SNMP Access Control

Use the SNMP Access Control screen (as launched from the SNMP Access screen) to specify
which users can read SNMP generated information and, if capable, modify related settings from an
SNMP-capable client.

Use the SNMP Access Control screen's Access Control List (ACL) to limit, by Internet Protocol (IP)
address, who can access the AP-5131 SNMP interface.

4-23

NOTE The ACL applies to both SNMP v3 user definitions and SNMP v1/v2c

community definitions on the AP-5131 SNMP Access screen.

To configure SNMP user access control for the AP-5131:

1. Select System Configuration - > SNMP Access from the AP-5131 menu tree. Click on the

SNMP Access Control button from within the SNMP Access screen.

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AP-5131 Access Point Product Reference Guide

2. Configure the SNMP Access Control screen to add the IP addresses of those users receiving
SNMP access.

Access Control List Enter Start IP and End IP addresses (numerical addresses only, no

DNS names supported) to specify a range of user that can access
the

AP-5131 SNMP interface. An SNMP-capable client can be set

up whereby only the administrator (for example) can use a read/
write community definition.

Use just the Starting IP Address column to specify a single SNMP
user. Use both the Starting IP Address and Ending IP Address
columns to specify a range of addresses for SNMP users.

To add a single IP address to the ACL, enter the same IP address in
the Start IP and End IP fields.

Leave the ACL blank to allow access to the SNMP interface from
the IP addresses of all authorized users.

Add Click Add to create a new ACL entry.

Edit Click Edit to revise an existing ACL entry.

Delete Click Delete to remove a selected ACL entry for one or more SNMP

users.