Intermec MobileLAN 21 Series, MobileLAN 2101, MobileLAN 2100, MobileLAN 2102, MobileLAN 2106 System Manual

System Manual

MobileLAN™access
21XX

Intermec Technologies Corporation
6001 36th Avenue West
Everett, WA 98203-9280

U.S. service and technical support: 1-800-755-5505
U.S. media supplies ordering information: 1-800-227-9947

Canadian service and technical support: 1-800-668-7043
Canadian media supplies ordering information: 1-800-268-6936

Outside U.S.A. and Canada: Contact your local Intermec service supplier.

The information contained herein is proprietary and is provided solely for the purpose of allowing customers
to operate and/or service Intermec manufactured equipment and is not to be released, reproduced, or used for
any other purpose without written permission of Intermec.

Information and specifications in this manual are subject to change without notice.

2002 by Intermec Technologies Corporation



All Rights Reserved

The word Intermec, the Intermec logo, INCA (under license), MobileLAN, JANUS, IRL, Trakker Antares,
EZBuilder, TE 2000, Data Collection Browser, dcBrowser, Universal Access Point, UAP, Duratherm,
EasyCoder, Precision Print, PrintSet, Virtual Wedge, and CrossBar are either trademarks or registered
trademarks of Intermec.

Throughout this manual, trademarked names may be used. Rather than put a trademark ( or ) symbol in
every occurrence of a trademarked name, we state that we are using the names only in an editorial fashion, and
to the benefit of the trademark owner, with no intention of infringement.

There are U.S. and foreign patents pending.

Manual Change Record

This page records the changes to this manual. The manual was originally released as version 001.

Version Date Description of Change

002 11/1998 Added information about the 900 MHz UAP and WAP, and the OpenAir WAP.

003 6/1999 Added information about the IEEE 802.11 Direct Sequence radio and firmware

upgrade features.

004 10/1999 Added information about the S-UHF radio and the 2101 Universal Office Access

Point. This revision also reflects the discontinuance of the 2110 Wireless Access
Point and the name change for this manual from a user’s manual to a technical
reference manual.

005 12/1999 Revised IEEE 802.11 DS radio menus and parameters.

006 10/2000 Revised to support firmware v1.4. Features include the addition of the IEEE 802.11b

radio, WEP 128, IDRS, and the Web User Name parameter.

007 02/2001 Reorganized and revised to support firmware 1.50. Features include the ability to use

the access point as a DHCP server, improved access control, and internet software
download support.

008 03/2002 Reorganized and revised to support firmware 1.7x and the 2106 access point with the

802.11a radio. This revision also reflects the name change for this manual from a
technical reference manual to the MobileLAN access 21XX System Manual.

Contents

Contents

Before You Begin xiii

Warranty Information xiii
Safety Summary xiii
Cautions and Notes xiv
About This Manual xiv
Patent Information xv
Other Related Manuals xv

Getting Started

1

Overview of the MobileLAN access 21XX Family 1-3

Features 1-4
What’s New for Release 1.7X? 1-5
Understanding the LEDs 1-6
Understanding the Ports 1-8

How the 21XX Fits in Your Network 1-11

Using an Access Point in a Simple Wireless Network 1-11
Using Access Points and Roaming End Devices 1-12
Using Access Points with Dual Radios For Redundancy 1-13
Using Access Points to Create a Point-to-Point Bridge 1-14
Using an Access Point as a WAP 1-15

Configuring the 21XX (Setting the IP Address) 1-16

Using the MobileLAN access Utility 1-16
Using a Communications Program 1-18
Using a Web Browser Interface 1-21
Saving Configuration Changes 1-23

Installing the 21XX

2

Installation Guidelines 2-3

Microwave Ovens 2-3
Cordless Telephones 2-4
Other Access Points 2-4

Installing the 2101 2-4

Attaching the Standard Antenna 2-5
Attaching the Dual Antenna Bracket for Antenna Diversity (802.11b) 2-6
Mounting the 2101 Using the Wall Bracket 2-6

v

MobileLAN access 21XX System Manual

Connecting to Your Wired LAN 2-8
Connecting to Power 2-8

Installing the 2100 2-9

Mounting the 2100 2-9
Attaching an Antenna 2-9
Connecting to Your Wired LAN 2-9
Connecting to Power 2-10

Installing the 2102/2106 2-10

Mounting the 2102/2106 Using the Mounting Bracket 2-11
Positioning the Standard Antenna 2-12
Attaching an External Antenna (2102) 2-12
Connecting to Your Ethernet Network 2-14
Connecting to Power 2-14

Connecting to Your Fiber Optic Network 2-15

Connecting to an MT-RJ Network 2-15
Connecting to an SC Network 2-16
Connecting to an ST Network 2-17

3

Using the MobileLAN splitter 2-17

External Antenna Placement Guidelines 2-19

Positioning Antennas for 802.11b Radios 2-19

Positioning Antennas for Antenna Diversity 2-20
Positioning Antennas for Dual Radios 2-20

Positioning Antennas for an OpenAir WAP 2-21

Configuring the Ethernet Network

Configuring the TCP/IP Settings 3-3

Configuring the 21XX as a DHCP Client 3-5
Configuring the 21XX as a DHCP Server 3-6

Supported DHCP Server Options 3-8
Unsupported DHCP Server Options 3-8

About Network Address Translation (NAT) 3-8
Configuring the 21XX as an ARP Server 3-9
Configuring the 21XX to Send ARP Requests 3-10

Configuring the Ethernet or Fiber Optic Settings 3-11

vi

Configuring Ethernet Filters 3-13

Configuring the Ethernet Address Table 3-13
Using Ethernet Frame Type Filters 3-14

Using Predefined Subtype Filters 3-17
Customizing Subtype Filters 3-18

Configuring Advanced Filters 3-20

Setting Filter Values 3-20
Setting Filter Expressions 3-21
Ethernet Advanced Filter Example 3-23

Configuring the Spanning Tree

Contents

4

Configuring the Spanning Tree Parameters 4-3

About the Root Access Point 4-5
About Bridging 4-6
About Secondary LANs and Designated Bridges 4-8

Configuring Global Parameters 4-9

Configuring Global Flooding 4-9
Configuring Global RF Parameters 4-12

About IP Tunnels 4-14

Internet Group Management Protocol (IGMP) 4-16
Originating IP Tunnels 4-17
Establishing and Maintaining IP Tunnels 4-17
IP Addressing for End Devices 4-18
Using Non-IP Protocols 4-18
Frame Forwarding 4-18

Outbound Frames 4-20
Inbound Frames 4-20

Configuring IP Tunnels 4-20

Configuring IP Tunnel Filters 4-23

Using IP Tunnel Frame Type Filters 4-24

Using Predefined Subtype Filters 4-27
Customizing Subtype Filters 4-28

IP Tunnel Filter Examples 4-29

Example 1 4-30
Example 2 4-30
Example 3 4-32
Example 4 4-32

Comparing IP Tunnels to Mobile IP 4-33

vii

MobileLAN access 21XX System Manual

Configuring the Radios

5

About the Radios 5-3

Configuring the IEEE 802.11b Radio 5-4

Configuring 802.11b Radio Advanced Parameters 5-7
Configuring a MobileLAN voice Network 5-9

Configuring the IEEE 802.11a Radio 5-10

Configuring 802.11a Radio Advanced Parameters 5-13

Configuring the WLI Forum OpenAir Radio 5-15

Setting Manual MAC Parameters 5-17

Configuring the 902 MHz Radio 5-20

Configuring the S-UHF Radio 5-22

Configuring WAPs 5-24

Example: Configuring an OpenAir WAP 5-27

Configuring Point-to-Point Bridges 5-28

Example: Configuring an 802.11b Point-to-Point Bridge 5-31

Examples - Configuring 802.11b Networks 5-31

Example 1: Configuring Wireless Hops Without WEP 5-31
Example 2: Configuring a Wireless Hop From a Remote LAN 5-33
Example 3: Configuring Wireless Hops With WEP 5-34

viii

6

Setting Up Security

About Security 6-3

Enabling Access Methods 6-3

Setting Up Logins 6-5

Configuring the Internal RADIUS Server 6-8

Using MobileLAN secure (802.1x) 6-10

Using Static WEP Keys 6-13

Contents

Managing, Troubleshooting, and Upgrading the 21XX

7

Managing the 21XX 7-3

Using Simple Network Management Protocol (SNMP) 7-3
Using Intermec Device Registration Service (IDRS) Servers 7-5

Maintaining the 21XX 7-6

Understanding the LEDs Lighting Sequence 7-6
Viewing AP Connections 7-7
Viewing Port Statistics 7-8
Viewing the Configuration Summary 7-9
Viewing the About This Access Point Screen 7-10
Restoring the 21XX to the Default Configuration 7-10

Using the MobileLAN access Utility 7-11
Using the Web Browser Interface 7-12

Troubleshooting the 21XX 7-13

Getting Help With Your Installation 7-13
General Troubleshooting 7-13
Troubleshooting the Radios 7-17

Using LEDs 7-17
Using a Communications Program or a Telnet Session 7-17
Using Radio MAC Ping (802.11b Radios) 7-18
Using ICMP Echo 7-19

Reloading Access Point Files 7-21

8

Upgrading the 21XX 7-24

Using the MobileLAN access Utility 7-24
Using a Web Browser Interface 7-27
Using a Communications Program 7-28
Using TFTP 7-31
Troubleshooting the Upgrade 7-36

Additional Access Point Features

Understanding the Access Point Segments 8-3

Using the AP Monitor 8-3

Entering the AP Monitor 8-3
Using AP Monitor Commands 8-4
Using Content Addressable Memory (CAM) Mode Commands 8-5
Using Test Mode Commands 8-6
Using Service Mode Commands 8-7

ix

MobileLAN access 21XX System Manual

Using Command Console Mode 8-11

Entering Command Console Mode 8-11
Using the Commands 8-12
Using TFTP Commands 8-14
Using sdvars Commands 8-18

Creating Script Files 8-21

Specifications and Default Settings

A

Specifications A-3

2101 A-3

2100 A-4

2102 A-5

2106 A-6

Radio Specifications A-7

IEEE 802.11b A-7

IEEE 802.11a A-8

WLI Forum OpenAir A-8

902 MHz A-9

S-UHF A-9

Antennas and Antenna Accessories A-10

Default Settings A-12

TCP/IP Settings Menu Defaults A-12
Spanning Tree Settings Menu Defaults A-12

Global Flooding Menu Defaults A-13

Global RF Parameters Menu Defaults A-13
Ethernet Configuration Menu Defaults A-14

Ethernet Filters Menu Defaults A-14

Ethernet Advanced Filters Menu Defaults A-15
IP Tunnels Menu Defaults A-16

Tunnel Filters Menu Defaults A-16
Network Management Menu Defaults A-17
Security Menu Defaults A-17

Password Menu Defaults A-17

802.1x Menu Defaults A-18

IEEE 802.11 (b or a) WEP Menu Defaults A-18

Internal RADIUS Server Menu Defaults A-18
IEEE 802.11b Radio Menu Defaults A-19
IEEE 802.11a Radio Menu Defaults A-20
OpenAir Radio Menu Defaults A-21

x

G

I

Contents

902 MHz Radio Configuration Menu Defaults A-22
S-UHF Radio Configuration Menu Defaults A-22

Glossary

Index

xi

asdfasdf

Before You Begin

This section introduces you to standard warranty provisions, safety precautions,
cautions and notes, document formatting conventions, and sources of additional product
information. A documentation roadmap is also provided to guide you in finding the
appropriate information.

Warranty Information

To receive a copy of the standard warranty provision for this product, contact your local
Intermec sales organization. In the U.S.A. you can call 1-800-755-5505, and in Canada
call 1-800-668-7043. Otherwise, refer to the Worldwide Sales & Service list that ships
with this manual for the address and telephone number of your Intermec Technologies
sales organization.

Opening this product may void the warranty. The internal workings of this

Note:

product can only be accessed by Intermec service personnel. Radio replacements and
upgrades require Intermec service personnel.

Before You Begin

Safety Summary

Your safety is extremely important. Read and follow all warnings and cautions in this
book before handling and operating Intermec equipment. You can be seriously injured,
and equipment and data can be damaged if you do not follow the safety warnings and
cautions.

Do not repair or adjust alone Do not repair or adjust energized equipment alone
under any circumstances. Someone capable of providing first aid must always be
present for your safety.

First aid Always obtain first aid or medical attention immediately after an injury.
Never neglect an injury, no matter how slight it seems.

Resuscitation Begin resuscitation immediately if someone is injured and stops
breathing. Any delay could result in death. To work on or near high voltage, you should
be familiar with approved industrial first aid methods.

Energized equipment Never work on energized equipment unless authorized by a
responsible authority. Energized electrical equipment is dangerous. Electrical shock
from energized equipment can cause death. If you must perform authorized emergency
work on energized equipment, be sure that you comply strictly with approved safety
regulations.

xiii

MobileLAN access 21XX System Manual

Cautions and Notes

The cautions and notes in this manual use the following format.

Caution

A caution alerts you to an operating procedure, practice, condition, or statement that
must be strictly observed to prevent equipment damage or destruction, or corruption
or loss of data.

Conseil

Une précaution vous avertit d’une procédure de fonctionnement, d’une méthode,
d’un état ou d’un rapport qui doit être strictement respecté pour empêcher
l’endommagement ou la destruction de l’équipement, ou l’altération ou la perte de
données.

Notes either provide extra information about a topic or contain special

Note:

instructions for handling a particular condition or set of circumstances.

About This Manual

The MobileLAN access 21XX System Manual provides you with information about the
features of the access points, and how to install, configure, and troubleshoot it. You
must be familiar with your host PC, your network, your other Intermec equipment, and
your data collection network.

Terminology

You should be aware of how these terms are being used in this manual:

Term Description

access point These terms are used to describe any of the MobileLAN

access 21XX products, including the 2100, the 2101, the
2102, the 2102S, and the 2106 unless specifically stated
otherwise.

WAP This term refers specifically to a MobileLAN access 21XX

that is configured as a wireless repeater.

end device Any wireless end device configured to transmit data to and

receive data from a MobileLAN access 21XX.

xiv

Before You Begin

Format Conventions for Input From a Keyboard or Keypad

This table describes the formatting conventions for input from host PC keyboards:

Convention How to Interpret the Convention

Special text

Shows the command as you should enter it into the device.

Italic text

Bold text

where This word introduces a list of parameters and explains the values

Indicates a variable that you must replace with a value.

Indicates the keys you must press on a PC keyboard. For example,
“press
keyboard.

you can specify for them.

” means you press the key labeled “Enter” on the PC

Enter

Patent Information

Product is covered by one or more of the following patents: 4,910,794; 5,070,536;
5,295,154; 5,349,678; 5,394,436; 5,425,051; 5,428,636; 5,483,676; 5,504,746;
5,546,397; 5,574,979; 5,592,512; 5,680,633; 5,682,299; 5,696,903; 5,740,366;
5,790,536; 5,844,893; 5,862,171; 5,940,771; 5,960,344.

There may be other U.S. and foreign patents pending.

Other Related Manuals

You may need additional information when working with the MobileLAN access 21XX
products. Please visit our Web site at www.intermec.com to download many of our
current manuals in PDF format. To order printed versions of the Intermec manuals,
contact your local Intermec representative or distributor.

xv

sadsf

1

Getting Started

MobileLAN access 21XX User’s Manual

1-2

Getting Started

The chapter introduces and explains the 21XX access points and how you can use
them in a data collection network.

Overview of the MobileLAN access 21XX Family

Intermec’s MobileLANaccess 21XX family of access points delivers reliable and
seamless wireless performance to almost any operational environment. They are
designed for standards-based connectivity and they support industry standard IEEE

802.11b, WLI Forum OpenAir, and IEEE 802.11a wireless technologies.

1

™

The 2100, 2101, or 2102/2102S with an IEEE 802.11b radio installed is Wi-Fi certified
for interoperability with other 802.11b wireless LAN devices.

The 21XX family consists of these access points:

2101

•

2100

•

2102/2102S

•

2106

•

The access point can be configured as an access point or as a point-to-point bridge. An
access point is connected to a wired local area network (LAN) and provides network
access for wireless end devices. A point-to-point bridge connects two wired LANs and
is often used to provide wireless communications in locations where running cable is
difficult, such as across roads or between buildings.

The access point can also be configured as a wireless access point (WAP) or repeater. A
WAP is not connected to a wired LAN; it receives data from wireless end devices and
forwards the data to an access point (that is connected to the wired LAN). A WAP is
useful in areas that do not support a wired network connection.

For help with your 2102S (Simplified) access point, see the MobileLAN

Note:

2102S User’s Guide (Part No. 072021).

access



1-3

MobileLAN access 21XX System Manual

Features

This table summarizes the similarities and differences between the access points.

21XX Feature Comparison

Feature 2101 2100 2102 2106

Access Point Yes Yes Yes Yes

Point-to-Point Bridge
(Wireless Bridge)

Wireless Access Point
(Repeater)

Radios 802.11b, OpenAir 802.11b, OpenAir,

Radio Independent

Dual Radio Support Yes Yes No No

Wi-Fi Compliant Yes Yes Yes Not Yet

10/100BaseT Yes Yes No Yes

10BaseT Yes Yes Yes Yes

Fiber Optics Yes Yes No No

Serial Port Yes Yes Yes No

Data Link Tunneling Yes Yes Yes Yes

IP Tunneling Yes Yes Yes Yes

Antenna Diversity Yes Yes Yes No

Non-incentive
Antenna System

Yes Yes Yes Not Yet

Yes Yes No No

802.11b, OpenAir 802.11a

900 MHz, S-UHF

Yes Yes No No



No Yes No No

NEMA 4/IP 54
Protection

Power Supply OptionDCACDCDC

Heater Option No Yes No No

Power Over Ethernet
Option

No Yes No No

Yes with
MobileLANsplitter

Yes Yes with

MobileLANsplitter

Yes with
MobileLANsplitter

1-4

Other features of the access points include the

ability to be managed by MobileLAN manager.

•

ability to be managed using a Web browser, Telnet, and SNMP.

•

ability to be a DHCP server or client.

•

ability to upgrade over the network or serial port.

•

ARP server registration.

•

software distribution.

•

256 wireless end devices supported.

•

advanced filtering of wired data traffic.

•

advanced RISC-based hardware architecture.

•

enhanced power management.

•

enhanced roaming reliability.

•

load balancing.

•

voice over IP optimization (802.11b radio).

•

Getting Started

1

What’s New for Release 1.7x?

New features that are documented in this manual for access point software release 1.7X
are

support for using WEP 128 with the MobileLANvoice wireless telephones. For

•

more information, see “Configuring a MobileLAN voice Network” in Chapter 5.

support for 2106 with the 802.11a radio. For more information, see “Installing the

•

2102/2106” in Chapter 2 and “Configuring the IEEE 802.11a Radio” in Chapter 5.

login security using an external password server (typically a RADIUS server). For

•

more information, see “Setting Up Logins” in Chapter 6.

login security using the access point as an internal RADIUS password server. For

•

more information, see “Configuring the Internal RADIUS Server” in Chapter 6.

802.1x security using an external 802.1x authentication server (typically a RADIUS

•

server). For more information, see “Using MobileLAN secure (802.1x)” in

Chapter 6.

MobileLANaccess Utility enhancements including help for recovering an access

•

point and the ability to act as a distributed upgrade server. For more information,

see “Reloading Access Point Files” and “Upgrading the 21XX” in Chapter 7.

1-5

MobileLAN access 21XX System Manual

Understanding the LEDs

The 2102 and 2106 have four LEDs; the 2101 and 2100 have five LEDs. The 2101 and
2100 have a separate LED for each of the radios.

LED Description

Power Remains on when power is applied.

Wireless #1 or
Radio

Wireless #2 (2101,

2100)

Flashes when a frame is transmitted or received on the radio port for
the radio installed in radio slot 1.

Flashes when a frame is transmitted or received on the radio port for
the radio installed in radio slot 2 (if a second radio is installed).

Wired LAN Flashes when a frame is transmitted or received on the Ethernet port.

Root/error Flashes if this device is configured as the root. May also remain on if

an error is detected.

2101 LEDs

1-6

Universal Access Point

™

Power

Wireless #1

Wireless #2

Root/error

Wired LAN

21XXT018.eps

2100 LEDs

Getting Started

1

2102 and 2106 LEDs

Powe r

Power

Wireless#1Wireless

#2

Wired

Radio

LAN

Wired LAN

Root/error

Root/
error

21XXT003.eps

21XXT031.eps

1-7

MobileLAN access 21XX System Manual

Understanding the Ports

Caution

You must use the appropriate Intermec power supply with these devices or equipment
damage may occur.

Conseil

Vous devez utiliser la source d'alimentation Intermec adéquate avec cet appareil
sinon vous risquez d'endommager l'équipement.

The 2101, 2102, and 2106 ports are located on the bottom of the access point. To access
the ports on the 2100, you must remove the cable access door.

To remove the 2100 cable access door

1. Unscrew the two thumbscrews on the cable access door.

2. Remove the door.

Port Description

Power Used with an appropriate power cable, this port connects the access

point to an AC power source.

Serial Used with an RS-232 null-modem cable, this port connects the access

point to a terminal or PC to perform initial configuration.

10BaseT/100BaseTx
(2101, 2100, 2106)

10BaseT (2102) Used with an appropriate cable, this port connects the access point to

Fiber optic (2101,

2100)

Used with an appropriate cable, this port connects the access point to
your Ethernet network. The access point auto-negotiates with the
device it is communicating with so that the data rate is set at the highest
rate at which both devices can communicate.

your Ethernet network.

Optional 100BaseFX port. You must use an MT-RJ connector. Used
with an appropriate cable, this port connects the access point to your
fiber optic network.

1-8

2100 Ports Without Fiber Optic Option

21XXT007.eps

Powe r
port

10BaseT/
100BaseTx
Ethernet port

Serial
port

Cable
access
door

21XXT002.eps

Powe r
port

10BaseT/
100BaseTx
Ethernet port

Serial
port

Fiber
optic port

Cable
access
door

Getting Started

1

2100 Ports With Fiber Optic Option

1-9

MobileLAN access 21XX System Manual

2101 Ports Without and With Fiber Optic Option

2102 Ports

2106 Ports

Power port

10BaseT/100BaseTx
Ethernet port

10BaseT
Ethernet port

Serial port

Serial
port

21XXT026.eps

Power
port

21XXT030.eps

Power port

Fiber optic
port

10BaseT/100BaseTx
Ethernet port

Serial port

21XXT036.eps

1-10

10BaseT/100BaseTx
Ethernet port

Power
port

21XXT035.eps

How the 21XX Fits in Your Network

In general, the 21XX forwards data from wireless end devices to the wired Ethernet
network. You can also use the access point as a point-to-point bridge or as a WAP. Use
the access point in the following locations and environments.

2101 Use in most indoor environments.

2100 Use in locations where an access point is exposed to extreme environments.

2102/2102S/2106 Use when you do not need mixed radios or the 2102 is configured

as a station at the remote end of a wireless hop to a secondary LAN.

The access point supports a variety of network configurations. These configurations are
explained in this section.

Using an Access Point in a Simple Wireless Network

You can use an access point to
extend your existing Ethernet
network to include wireless
end devices. The access point
connects directly to your wired
network, and the end devices
form a network that functions
as a wireless extension of the
wired LAN.

In a simple wireless network, a
single access point on the
wired network serves as a
transparent bridge between the
wired network and wireless
end devices. The end devices
communicate exclusively with
devices on the wired network;
they do not communicate with
other wireless end devices.

Host

Ethernet

Access
point

Getting Started

1

21XXT004.eps

1-11

MobileLAN access 21XX System Manual

Using Access Points and Roaming End Devices

For larger or more complex environments, you can install multiple access points so that
wireless end devices can roam from one access point to another. In large installations,
these access points may be on different subnets. Multiple access points establish
coverage areas or cells similar to those of a cellular telephone network. Wireless end
devices can connect with any access point that is within range and belongs to the same
network.

An end device initiates a roam when it attaches to a new access point. The access point
sends an attach message to the root access point, which in turn forwards a detach
message to the previous access point, allowing each access point to update its
forwarding database. Intermediate access points monitor these exchanges and update
their forwarding databases.

With the access point multichannel architecture, you can have more than one access
point within the same cell area to increase throughput. Also, overlapping radio coverage
cells offer redundancy for critical applications so that coverage is not lost if a single
access point or radio fails.

Ethernet

Host

UAPUAP

UAP

21XXT006.eps

1-12

Getting Started

1

Using Access Points with Dual Radios For Redundancy

You can use the multiple 2101s and 2100s that have two 802.11b radios or two OpenAir
radios to provide redundancy for your network. In each access point, you need to
configure one radio’s node type as a Master, which communicates with the wireless end
devices and configure the other radio’s node type as a Station.

During normal operations, wireless end devices send frames to the master radio, which
then bridges the frames to the Ethernet network. If the Ethernet network is down, the
master radio receives the frames and then the station radio forwards the frames to a
master radio in another access point.

In this next example, AP3 may be located on a loading dock or other remote location. It
has dual radios for redundancy. During normal operations, AP3 functions as a standard
access point, transmitting frames to and from the host on the Ethernet network. If the
Ethernet connection is disrupted, however, AP3 functions as a WAP, continuing
operations by transmitting frames using a wireless link to a master radio in AP1.

AP1 must have the Wireless Hops parameter enabled, and AP3 must be within

Note:

range of AP1.

Host

Ethernet

AP1

AP3

21XXT014.eps

1-13

MobileLAN access 21XX System Manual

Using Access Points to Create a Point-to-Point Bridge

You can use access points to create a point-to-point bridge between two wired LANs.
You can have one access point wired to a network in one building and have a second
access point wired to a network in another building. This configuration lets wired and
wireless end devices in both buildings communicate with each other, which can be
useful in a campus environment or any other environment where pavement or other
objects prevent installation of a wired link.

These access points can be acting simultaneously as access points and bridges or they
can be acting as a bridge that is communicating to other access points. If these access
points are acting as access points and bridges and if they connect 802.11b or OpenAir
networks, each access point must contain two of the same radios. If they connect 902
MHz networks or if they are simply acting as a bridge, each access point only needs one
radio.

For information about configuring access points for point-to-point bridging, see
Chapter 5, “Configuring the Radios.”

Currently, the access points with an 802.11a radio (2106) and access points with

Note:

an S-UHF (2100) radio cannot do point-to-point bridging.

Host

Ethernet Ethernet

Host

21XXT013.eps

1-14

Getting Started

1

Using an Access Point as a WAP

You can extend the range of your network by configuring the access point as a wireless
access point (WAP). You position the WAP in a strategic location so it receives data
from wireless end devices and then forwards the data toward the wired network. This
configuration is useful when distance or physical layout impedes radio reception and
transmission. No more than two WAPs are allowed for each access point that is wired to
your network.

For information about configuring the access point as a WAP, see Chapter 5,
“Configuring the Radios.”

If you have an 802.11b, 802.11a, or OpenAir network, the WAP must contain

Note:

two radios of the same type. 2102s and 2106s cannot be WAPs.

Host

Ethernet

WAP

21XXT012.eps

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MobileLAN access 21XX System Manual

Configuring the 21XX (Setting the IP Address)

The 21XX will work directly out of the box if you are using a DHCP server to assign it
an IP address. By default, the access point is configured to be a DHCP client. However,
if you are not using a DHCP server to assign IP address, you must assign the access
point an IP address before you can manage it remotely.

To configure the IP address, you can use:

the MobileLAN access Utility. This utility needs to be installed on a PC that is on

•

the same Ethernet segment and subnet as the access point. Or, it can also be
installed on a PC with a wireless link (configured to Intermec’s default settings) to
the access point. For help, see “Using the MobileLAN access Utility” in the next
section.

a communications program (such as HyperTerminal). This program needs to be

•

installed on a PC with an open serial port. For help, see “Using a Communications
Program” later in this section.

This manual assumes that you are using the MobileLAN access Utility or a
communications program for your initial configuration and then using a Web browser
interface to perform all other configurations. You can also continue to use a
communications program or you can start a Telnet session to configure the access point.

Using the MobileLAN access Utility

The MobileLAN access Utility is an easy-to-use Microsoft Windows-based utility
that lets you

configure an IP address for the access point. This utility eliminates the need to

•

serially connect a PC to the access point to configure its IP address.

restore the access point settings to factory defaults. For help, see the online help and

•

“Restoring the 21XX to the Default Configuration” in Chapter 7.

recover a failed access point. For help, see the online help and “Reloading Access

•

Point Files” in Chapter 7.

upgrade the access point software. For help, see the online help and “Upgrading the

•

21XX” in Chapter 7.

After you configure the IP address, you can use a Web browser or a Telnet session to
complete the configuration.

To use the MobileLAN access Utility, you must have the following:

Windows 95-OSR2/98SE/ME, Windows NT4.0/2000/XP

•

Access point firmware release 1.61 or later

•

1-16

Getting Started

You need to install the MobileLAN access Utility on a PC that is on the same IP

Note:

subnet as the access point.

Or, you need to install it on a PC with a wireless link (configured to Intermec’s default
radio settings) to the access point. Before you use the utility, you must have an active
radio connection.

To use the MobileLAN access Utility

1. Insert the MobileLAN access Utility CD into your PC’s CD-ROM drive. The CD
starts automatically and you will see the CD home page with menu buttons. Click
Install Software. If you do not see this home page, from the Start menu, choose
Run. In the Open field, type

Or, use a Web browser to navigate to mobilelan.intermec.com. Click Software
Downloads and download the MobileLAN access Utility.

2. Follow the instructions that appear on your screen to install the utility.

3. Start the utility.

X

:\INDEX.HTM, where X is the CD-ROM drive.

1

4. Click the down arrow on the right side of the Select Task field and choose Set IP
Address.

5. In the New IP Address field, enter the IP address.

6. In the Ethernet MAC Address field, enter the MAC address of the access point. This
address is located on the bottom of the access point.

7. Connect the power cable to the access point and to a power source. The access point
has no On/Off switch, so it boots as soon as you apply power.

1-17

MobileLAN access 21XX System Manual

8. Immediately click Set. The Status box lets you know when the IP address has been
set.

9. To continue configuring the access point using a Web browser, from the Actions
menu choose Configure Access Point and then enter the new IP address of this
access point.

Or, to close the utility, from the File menu choose Exit.

For more help using the utility, from the Help menu choose Contents.

For optimal performance, you may need to set additional parameters. For more
information, see Chapter 3, “Configuring the Ethernet Network.”

Using a Communications Program

To perform a basic configuration for the 21XX, you need

a power cable.

•

an RS-232 null-modem cable. One end of this cable must be a 9-pin socket

•

connector to connect to the serial port on the access point. Intermec offers a 9­socket to 9-socket null-modem cable (Part No. 059167).

a terminal or PC with an open serial port.

•

The following procedure explains how to configure the basic parameters using a
communications program; however, if you want to use a remote connection to configure
the parameters, you only need to perform Steps 1 through 6.

To use a communications program

1. Use the RS-232 null-modem cable to connect the serial port on the access point to a
serial port on your PC. You may need to remove the serial port plug.

2. Start the communications program and configure the serial port communications
parameters on your PC to:

Bits per second 9600
Data bits 8
Parity None
Stop bit 1
Flow control None

Click OK.

3. Connect the power cable to the access point and to a power source. The access point
has no On/Off switch, so it boots as soon as you apply power.

1-18

Getting Started

1

4. Press
The Username field appears.

5. Type the default username Intermec, press
Intermec, and press

when the message “Starting system” appears on your PC screen.

Enter

. The Access Point Configuration menu appears.

Enter

, type the default password

Enter

1-19

MobileLAN access 21XX System Manual

6. If you are not using a DHCP server, you need to manually assign an IP address.
Configure these parameters in the TCP/IP Settings menu:

IP Address A unique IP address.

IP Subnet Mask The subnet mask that matches the other devices in your

IP Router (Gateway) If the access point will communicate with devices on

Or, if you are using a DHCP server to automatically assign an IP address to your
access point, configure these parameters in the TCP/IP Settings menu:

DHCP Mode Set to <Enabled, if IP Address is zero>.

DHCP Server Name The name of the DHCP server that the access point is

network.

another subnet, enter the address of the router that will
forward frames.

to access for automatic address assignment. If no
server name is specified, the access point responds to
offers from any server.

7. In the Spanning Tree Settings menu, configure LAN ID (Domain). All access points
must have the same LAN ID to participate in the same spanning tree.

8. In the radio menu for your radio, configure these parameters.

802.11b radios If you are using 802.11b radios, configure these parameters in the
IEEE 802.11b Radio menu.

(SSID) Network Name The network name. All 802.11b radios must have the

same network name to communicate.

Frequency The frequency appropriate for your installation.

Frequencies range from 2.4 to 2.5 GHz and depend on
the specific country.

802.11a radios If you are using 802.11a radios, these parameters in the IEEE

802.11a Radio menu.

(SSID) Network Name The network name. All 802.11a radios must have the

same network name to communicate.

Frequency The frequency appropriate for your installation.

Frequencies range from 5.15 to 5.35 GHz and depend
on the specific country.

1-20

Getting Started

OpenAir radios If you are using OpenAir radios, note that all OpenAir radios on

the same network must have the same LAN ID to communicate.

Channel A number from 1 to 15.

Subchannel A number from 1 to 15.

Security ID An identification up to 20 alphanumeric characters

long. All OpenAir radios must have the same security
ID to communicate.

Intermec recommends that you set the security ID to a value other than

Note:

NULL (the default value) to prevent unauthorized access to your network.

900 MHz radios If you are using 900 MHz radios, configure the Mode-Channel
parameter. All 900 MHz radios must have the same Mode-Channel setting to
communicate.

S-UHF radios If you are using S-UHF radios in the U.S.A. and you are required to
transmit a call sign, configure the Call Sign parameter.

9. Save the configuration.

1

10. Disconnect the null-modem and power cables.

You are now ready to install the access point in your network. For optimal performance,
you may need to set additional parameters. For more information, see Chapter 3,
“Configuring the Ethernet Network.”

Using a Web Browser Interface

After you have configured the IP address, you can configure, manage, and troubleshoot
the access point from a remote location using a Telnet session or a Web browser
interface. The Web browser interface has been tested using Internet Explorer v3.0 and
later and Netscape Communicator v4.0 and later. Remotely accessing the access point
using other browsers may provide unpredictable results.

Only one session can be active with the access point at a time. If your session terminates
abruptly or a new login screen appears, someone else may have accessed the access
point. When using the Web browser interface, keep the following points in mind:

Your session terminates if you do not use it for 15 minutes.

•

Command Console mode is not available.

•

If you access the Internet using a proxy server, you must add the IP address of the

Note:

access point to your Exceptions list. The Exceptions list contains the addresses that you
do not want to use with a proxy server.

1-21

MobileLAN access 21XX System Manual

To use a Web browser interface

1. Determine the IP address of the access point. If a DHCP server assigned the IP
address, you must get the IP address from the DHCP server.

2. Start the Web browser application.

3. Access the access point using one of these methods:

In the Address field (Internet Explorer) or in the Location field (Netscape

•

Communicator), enter the IP address, and press

From the File menu, choose Open (Internet Explorer) or choose Open Page

•

(Netscape Communicator). In the field, enter the IP address and press

The Access Point Login screen appears. You may need to enter a user name and
password.

Enter

.

.

Enter

1-22

Getting Started

4. Click Login. The TCP/IP Settings screen appears. You can define a user name and
password. For help, see “Setting Up Logins” in Chapter 6.

1

Your Web browser session is established.

Although you can use several different methods to manage the access point

Note:

remotely, this manual assumes you are using a Web browser.

Saving Configuration Changes

When you are done configuring the access point, you may want to activate your changes
immediately or you may want to save the changes now and activate them later. If you
choose to activate the changes later, they will become active the next time the access is
booted.

The access points use three configuration files:

Default This configuration file is the factory default configuration. For help, see
“Restoring the 21XX to the Default Configuration” in Chapter 7.

Current When you click Submit Changes, the access point updates the current
configuration file. The access point does not change the active configuration file. You
can see a list of pending changes when you click Save/Discard Changes. Having
separate files for the current and active configurations lets you make changes while the
access point is running without interrupting communication.

Active When you click Save/Discard Changes and then you click Save Changes and
Reboot, the access point copies the current configuration file to the active configuration
file. The active configuration file is the file that the access point uses.

1-23

MobileLAN access 21XX System Manual

To save your changes

1. On the menu bar, click Save/Discard Changes.

This screen appears and is explained next.

Click to use your new
configuration now.

Click to use your new
configuration the next
time you reboot the
access point.

Lists configuration
changes you have made.

2. Verify that all your configuration changes appear in the Pending Changes box.

3. Click Save Changes and Reboot to reboot the access point and immediately use
your new active configuration.

Or, click Save Changes without Reboot. The access point saves the changes to its
current configuration and continues to run its active configuration. You will need to
reboot the access point when you want the current configuration to become the
active configuration.

To discard the changes

1-24

Click Discard Pending Changes.

•

2

Installing the 21XX

21XX Access Point Technical Reference Manual

This chapter explains how to install the access points in your network, provides some
external antenna guidelines and provides some tips on how to position access points
to improve your network performance.

Installation Guidelines

Intermec recommends that you have Intermec or other certified providers conduct a site
survey to determine the ideal locations for all of your network components. A proper
site survey requires special equipment and training. The following general practices
should be followed in any installation:

Locate access points centrally within areas requiring coverage.

•

Overlap access point radio coverage areas to avoid coverage holes.

•

Try to position the access point so that its LEDs are visible. The LEDs are useful for

•

troubleshooting.

Install wired LAN cabling within node limit and cable length limitations.

•

Use an uninterruptible power supply (UPS) when AC power is not reliable.

•

Installing the 21XX

2

Proper antenna placement can help improve range. For information about antenna
options, contact your local Intermec representative. For more guidelines, see “External
Antenna Placement Guidelines” later in this chapter.

When determining ideal locations for the access points, be aware that you may see
network performance degradation from microwave ovens, cordless telephones, and
other access points. For more information, see the next sections.

Microwave ovens, cordless telephones, and other access points do not degrade the

Note:

network performance of the 802.11a radio.

Microwave Ovens

Microwave ovens operate in the same frequency band as 802.11b and OpenAir radios;
therefore, if you use a microwave oven within range of your wireless network, you may
notice network performance degradation. Both your microwave oven and your wireless
network will continue to function, but you may want to consider relocating your
microwave oven out of range of your access point.

For the 802.11b radio, the access point has a Microwave Oven Robustness parameter
that you can enable to minimize potential interference between your microwave oven
and your wireless network. For help, see “Configuring 802.11b Radio Advanced
Parameters” in Chapter 5.

2-3

MobileLAN access 21XX System Manual

Cordless Telephones

If you have an OpenAir or 902 MHz radio in your access point, the radio may experience
interference from some cordless telephones. For optimal performance, consider operating
902 MHz and 2.4 GHz cordless telephones out of range of your access points.

Other Access Points

Access points that are configured for the frequency and that are in the same radio
coverage area may interfere with each other and decrease throughput. You can reduce
the chance of interference by configuring your access points so they are configured 5
channels apart, such as Channels 1, 6, and 11.

Installing the 2101

You can place the 2101 horizontally on a desk or counter. The 2101 also ships with a
wall bracket that lets you mount it vertically to a wall.

Additional mounting options include a desk bracket that lets you mount the 2101
upright on a desk or counter, a cubicle bracket that lets you mount the 2101 on a cubicle
wall, and a locking bracket that you can use with the wall bracket.

These optional mounting brackets and accessories are available:

Desk bracket kit (Part No. 069657)

•

Cubicle bracket kit (Part No. 069926)

•

Locking bracket kit (Part No. 070184)

•

Dual antenna bracket kit (Part No. 069888)

•

Power supply holder kit (Part No. 069893)

•

To order one of these kits, contact your Intermec representative. To mount the 2101,
follow the instructions in the kit.

2-4

Installing the 21XX

To install the 2101

1. Attach the antenna(s).

2. Mount the 2101.

3. Connect the 2101 to your wired LAN (unless you are using it as a WAP).

4. Connect the 2101 to power.

These steps are explained in detail in the next sections. When you are done, you need to
configure the 2101 so it can communicate with your network.

2

Attaching the Standard Antenna

Intermec offers a variety of antennas and antenna accessories. For more information, see
“Antennas and Antenna Accessories” in Appendix A.

To attach the standard antenna

1. Carefully align the antenna with the antenna
connector on the radio card in the 2101.

2. Gently insert the antenna into the antenna
connector until you feel the antenna click
into place.

Antenna

2101I002 .eps

2-5

MobileLAN access 21XX System Manual

Attaching the Dual Antenna Bracket for Antenna Diversity (802.11b)

The 802.11b radio features antenna diversity,
which lets you attach two antennas to a single
radio. One antenna port sends and receives
data, while the other antenna port only
receives data.

If you attach only one antenna to the 802.11b
radio, you must attach it to the | (send/receive)
port. This illustration shows how the optional
dual antenna bracket can be used to mount
antennas or antenna cables to a wall.

For more information about antenna diversity
and the send/receive port, see “External
Antenna Placement Guidelines” later in this
chapter.

To
Antenna

Antenna
bracket

Antenna
adapter
cable

21XXT033.eps

Mounting the 2101 Using the Wall Bracket

If you want to mount the 2101 vertically to a wall or beam, it ships with a mounting
bracket and four mounting screws. Install the 2101 in this mounting bracket on a sturdy
surface in accordance with local building codes. You need these tools and materials:

Drill and drill bit appropriate for the mounting screws

•

Screwdriver

•

To mount the access point vertically to a wall or beam

1. Insert one mounting screw into each of the threaded brass inserts on the back of the
2101 and tighten securely.

2-6

Mounting the 2101 Using the Wall Bracket (continued)

Brass
inserts

Mounting
screws
(4 places)

2101G004.eps

Installing the 21XX

2

2. Use the mounting bracket as a template to mark the location of the mounting holes
on the mounting surface.

3. Drill the mounting holes.

4. Position the bracket on the wall so the arrow points up.

Cable

Mounting
screws
(2-6 places)

Universal Access Point

™

routing
channels

Mounting
bracket

Wall

2101G006.eps

5. Using the screws you provided, secure the bracket to the wall.

2-7

MobileLAN access 21XX System Manual

6. Route the power and Ethernet cables through the cable routing channels in the
mounting bracket, if desired.

7. Mount the 2101 in the bracket by inserting the shoulder screws into the keyhole
slots in the bracket. Slide the 2101 down until it is firmly seated in the bracket.

Connecting to Your Wired LAN

Unless you are using the 2101 as a WAP, you must connect it to your Ethernet or fiber
optic network. To connect the 2101 to your fiber optic network, you must have a 2101
with the fiber optic option. For help, see “Connecting to Your Fiber Optic Network”
later in this chapter.

If you are using the MobileLAN power splitter to connect to power, see “Using the
MobileLAN splitter” later in this chapter.

To connect to your Ethernet network

Attach one end of the Ethernet cable to the 10BaseT/100BaseTx port on the 2101,

•

and attach the other end to your Ethernet network.

Connecting to Power

You can either use a power cord to connect the 2101 directly to an AC power outlet or
you can use the MobileLAN splitter to connect Ethernet and power to a MobileLAN
power bridge and the Intermec Power Hub. For help, see “Using the MobileLAN
splitter” later in this chapter.

To connect the 2101 to power

Plug one end of the power cord into the power port on the 2101 and plug the other

•

end into an AC power outlet. The access point boots as soon as you apply power.

2-8

Installing the 2100

The 2100 is designed to be placed horizontally or vertically on a desk or counter. You
can also mount it vertically to a wall or beam using a mounting bracket option. You
must mount the 2100 in either the horizontal or vertical position to maintain the IP 54
environmental rating.

To install the 2101

1. Mount the 2100.

2. Attach the antenna(s).

3. Connect the 2100 to your wired LAN (unless you are using it as a WAP).

4. Connect the 2100 to power.

These steps are explained in detail in the next sections. When you are done, you need to
configure the 2100 so it can communicate with your network.

Installing the 21XX

2

Mounting the 2100

If you want to mount the 2100 to a wall or beam using an Intermec mounting bracket
kit, you need one of these mounting kits:

Mounting bracket kit (Part No. 068918)

•

Rotating mounting bracket kit (Part No. 068751)

•

To order one of these kits, contact your Intermec representative. To mount the 2100,
follow the instructions in the kit.

Attaching an Antenna

A variety of external antenna options are available for the 2100. Contact your Intermec
representative for information about the various antenna options, including higher gain
and directional antennas. For more information about antennas and antenna accessories,
see “Antennas and Antenna Accessories” in Appendix A.

Connecting to Your Wired LAN

Unless you are using the 2100 as a WAP, you need to connect it to your Ethernet or
fiber optic network. To connect the 2100 to your fiber optic network, you must have a
2100 with the fiber optic option. For help, see “Connecting to Your Fiber Optic
Network” later in this chapter.

2-9

MobileLAN access 21XX System Manual

To connect to the Ethernet network

Attach one end of the Ethernet cable to the 10BaseT/100BaseTx port on the 2100

•

and attach the other end to your Ethernet network.

Connecting to Power

You can either use a power cord to connect the 2100 directly to a power outlet or you
can order a 2100 with the power over Ethernet option. This option lets you power the
2100 through its Ethernet cable that is connected to a MobileLAN power bridge and the
Intermec Power Hub. For help, see the documentation that shipped with your
MobileLAN power bridge.

To connect the 2100 to power

Plug one end of the power cord into the power port on the 2100 and plug the other

•

end into an AC power outlet. The access point boots as soon as you apply power.

Installing the 2102/2106

You can install the 2102 or the 2106 horizontally on a desk or counter, or you can install
it vertically to a wall using the wall bracket that ships with it.

An optional cubicle bracket is also available for mounting the 2102 or the 2106 on a
cubicle wall. These optional mounting bracket kits and accessories are available for the
2102 or the 2106:

Cubicle bracket kit (Part No. 070366)

•

Power supply holder kit (Part No. 069893)

•

This optional mounting bracket kit is available for the 2102:

Dual antenna bracket kit (Part No. 069888)

•

Contact your Intermec representative for more information about ordering access point
accessories.

To install the 2102 or 2106

1. Mount the 2102 or 2106.

2. Position or install the antenna.

3. Connect the 2102 or 2106 to your wired LAN (unless you are using it as a WAP).

2-10

4. Connect the 2102 or 2106 to power.

These steps are explained in detail in the next sections. When you are done, you need to
configure the 2102 or 2106 so it can communicate with your network.

Installing the 21XX

2

Mounting the 2102/2106 Using the Mounting Bracket

If you want to mount the 2102 or the 2106 on a wall, it ships with a mounting bracket
and four mounting screws. Install the 2102 or the 2106 in this mounting bracket on a
sturdy surface in accordance with local building codes. You need these tools and
materials:

Two #5 or M3 screws (appropriate for the surface on which you are mounting the

•

bracket)

Drill and drill bit appropriate for the mounting screws

•

Screwdriver

•

To mount the 2102/2106

1. Use the mounting bracket as a template to mark the location of the mounting holes
on the mounting surface.

2. Drill the mounting holes.

3. Position the bracket on the mounting surface.

Mounting
bracket

Hook
(2 places)

Clip

4. Using the screws you provided, secure the bracket to the wall.

5. Fit the slots on the back of the 2102 or the 2106 over the hooks on the mounting
bracket.

6. Slide the 2102 or the 2106 up slightly, and then press the base of the access point
until it clicks into the clip at the bottom of the mounting bracket.

Back
panel

Screw
(2 places)

Slot
(2 places)

21XXT037.eps

2-11

MobileLAN access 21XX System Manual

Positioning the Standard Antenna

The 2102 and the 2106 feature a built-in standard antenna that rotates 180° as shown in
the next illustration. Use these guidelines when positioning the antenna.

Do not force the antenna past the hard stop at 0° or 180° or you may break the

Note:

antenna connector.

Place the antenna at 0° when storing the 2102 or the 2106.

•

Place the antenna at 90° when using the 2102 or the 2106 horizontally; for instance,

•

when the 2102 is positioned on a desk or counter.

Place the antenna at 180° when using the 2102 or the 2106 vertically; for instance,

•

when it is mounted on a wall or cubicle.

90°

180°

2-12

0°

2102G015.eps

Attaching an External Antenna (2102)

To attach an external antenna to the 2102, you must first disconnect the built-in antenna
and then attach an antenna cable directly to the radio card. Intermec offers a variety of
antennas and antenna accessories, including diversity antennas. For more information,
see “Antennas and Antenna Accessories” in Appendix A. You need this tool:

Needle-nose pliers

•

To attach an external antenna

1. Remove the radio card door.

2. Pull straight up on the antenna wire to disconnect it from the radio card.

Attaching an External Antenna (continued)

3. Tuck the antenna wire inside the 2102 housing.

Door

Antenna
wire

21XXT010.eps

Installing the 21XX

2

4. Remove the punch-out tab from the door.

Door

Punch-out
tab

Pliers

21XXT009.eps

5. Attach the antenna cable to the radio by inserting the cable connector into the radio
card.

6. Replace the door.

2-13

MobileLAN access 21XX System Manual

Connecting to Your Ethernet Network

Unless you are using the 2102 as a WAP, you need to connect it to your Ethernet
network. Connect the 2106 to your Ethernet network. If you are using the MobileLAN
power splitter to connect to power, see “Using the MobileLAN splitter” later in this
chapter.

To connect to your Ethernet network

(2102) Attach one end of the 10BaseT cable to the 10BaseT port on the 2102, and

•

attach the other end to your Ethernet network.

(2106) Attach one end of the Ethernet cable to the 10BaseT/100BaseTx port on the
2106 and attach the other end to your Ethernet network.

Connecting to Power

You can either use a power cord to connect the 2102 or 2106 directly to an AC power
outlet or you can use the MobileLAN splitter to connect Ethernet and power to a
MobileLAN power bridge and the Intermec Power Hub. For help, see “Using the
MobileLAN splitter” later in this chapter.

The 2102 and 2106 use different power cords.

Note:

To connect to power

Plug one end of the power cord into the power port on the 2102 or the 2106 and

•

plug the other end into an AC power outlet. The access point boots as soon as you
apply power.

2-14

Connecting to Your Fiber Optic Network

21XXU039.eps

MT-RJ connector

To
access
point

MT-RJ adapter

To
MT-RJ
network

You can order your 2101 or 2100 access points with a fiber optic option. To connect the
access point with the fiber optic option to your fiber optic network, you must have a
patch cord and an adapter. Patch cords and adapters are available from many different
manufacturers. Using adapters and patch cords, you can connect your access point to

an MT-RJ network.

•

a square connector (SC) network.

•

a straight tip (ST) network.

•

For help choosing the proper cord and adapter, contact your local Intermec
representative

All cables must be multimode, 62.5/125 µm.

Note:

Installing the 21XX

2

Connecting to an MT-RJ Network

To connect to an MT-RJ network, you need

a patch cord for connecting the MT-RJ transceiver to the MT-RJ adapter.

•

an adapter for connecting an MT-RJ cord to an MT-RJ network.

•

To connect to an MT-RJ network

1. Remove any cable protectors attached to the patch cord and adapter.

2. Connect the access point to your network.

2-15

MobileLAN access 21XX System Manual

SC connector

To access
point

SC connector

To SC
network

SC adapter

21XXU040.eps

21XXU041.eps

SC connector
To
access
point

To
SC network

To
SC network

SC adapter

SC connector

Connecting to an SC Network

To connect to an SC network, you need

a patch cord for connecting the MT-RJ transceiver to the SC adapter.

•

an adapter for connecting an SC cord to an SC network.

•

To connect to an SC network

1. Remove any cable protectors attached to the patch cord and adapter.

2. Connect the access point to your network as shown in the next illustrations.

2-16

Installing the 21XX

21XXU042.eps

ST connector

ST adapter

ST connector

To
access
point

To
ST network

To
ST network

Connecting to an ST Network

To connect to an ST network, you need

a patch cord for connecting the MT-RJ transceiver to the ST adapter.

•

an adapter for connecting an ST cord to an ST network.

•

To connect to an ST network

1. Remove any cable protectors attached to the patch cord and adapter.

2. Connect the access point to your network.

2

Using the MobileLAN splitter

The MobileLAN splitter provides a power over Ethernet option to the 2101, 2102, and

2106. If you connect a splitter to the access point, you only need to run Ethernet lines to
the access point; you do not need to also run power.

You need to connect the splitter to a MobileLAN power bridge, which supplies

Note:

the AC power.

In a typical Ethernet cable (CAT5), four twisted pair lines are used for data and four are
unused. The splitter powers the access point using the unused Ethernet lines. These
Ethernet lines are passed through the splitter to an output RJ45 connector, which is
connected to a MobileLAN power bridge.

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MobileLAN access 21XX System Manual

21XXT050.eps

Mobile LAN
splitter

To Ethernet

To A C

Using the MobileLAN splitter (continued)

The splitter uses a switching regulator to convert DC voltage to the input voltage
required by the access point (5 VDC or 3.3 VDC). The input voltage goes to a power
connector, which is connected to the access point power port. An LED on the splitter
lights when power is being supplied to the access point. The data passes through the
splitter and then through the Ethernet connector, which is connected to the access point
10BaseT/100BaseTx port.

You order the MobileLAN splitter as an accessory. Intermec offers two different
splitters, depending on your access point input voltage.

(2101, 2102) MobileLAN power splitter, 5 VDC (Part No. 063198)

•

(2106) MobileLAN power splitter, 3.3 VDC (Part No. 071318)

•

To use the MobileLAN splitter

1. Install the MobileLAN power bridges. For help, see the documentation that shipped
with your power bridge.

2. Connect the MobileLAN splitter to the 10BaseT/100BaseTx or 10BaseT port of the
access point.

3. Connect the splitter to the power port of the access point.

4. Use the appropriate Ethernet cable to connect the splitter to the power bridge.

2-18

External Antenna Placement Guidelines

Every wireless network environment presents its own unique obstacles. Therefore, the
exact range that you will achieve with each access point is difficult to determine.
Intermec recommends that you allow an Intermec-certified RF specialist to perform a
site survey before you install a wireless network. For more information, contact your
local Intermec representative.

Radio signals may reflect off some obstacles and be absorbed by others. For example,
two radios may achieve up to 305 meters (1,000 feet) of range if positioned outdoors
within line of sight, with no obstacles between them. However, the same two radios
may only achieve up to 152 meters (500 feet) of range when the RF signal has to travel
through items such as cubicles. If the signal must penetrate office walls, the signal range
may decrease to 91 meters (300 feet).

Proper antenna placement can help improve range. For information about antenna
options, contact your local Intermec representative. Here are some general guidelines
for positioning antennas:

Installing the 21XX

2

Place the antenna as high as possible. In an office environment, try to place it above

•

cubicle walls.

Do not place a sheet of metal (such as a filing cabinet) between two antennas.

•

These next sections provide detailed information about antenna placement for those
access points that can have more than one antenna.

Positioning Antennas for 802.11b Radios

The antenna ports on the radio card are marked | and ||. Port | is the send/receive port;
port || is the receive only port. Intermec recommends that you use two antennas for
optimal performance of your 802.11b radio. If you attach only one antenna to this radio,
you must attach it to Port |.

The antenna diversity system uses only one antenna at a time.

Note:

On the 2101 and 2102, both antenna ports are visible. On the 2100, use antenna
connectors 2 and 4 to attach antennas to the send/receive ports.

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MobileLAN access 21XX System Manual

Positioning Antennas for Antenna Diversity

The 802.11b radio features antenna diversity, which means that two antennas can be
attached to a single radio. If you are using two antennas for one 802.11b radio,
placement of the antennas is critical because each antenna has a particular function.
Antennas placed too close together may cause interference with each other. Antennas
placed too far apart may not be able to establish two-way communications with other
radios. To achieve optimum placement for the two antennas, you must place the
transmit/receive antenna so that it is within range of all the radios that the receive-only
radio can hear.

Note these important points about antenna placement for an 802.11b radio:

Use external antennas to achieve the recommended antenna separation for

•

placement of either omni or directional antennas.

Position directional antennas so they point in the same direction.

•

Follow the recommended antenna separation precisely when using the closest

•

distances. Movement of as little as 3.05 cm (1.2 in) may strongly affect
performance.

Position the antennas so that both antennas are within range of the radios they need

•

to communicate with.

Do not position the two antennas around a corner or so that a wall is between them.

•

The recommended antenna separation is listed in this table. You should choose the
greatest distance possible within the constraints of your environment.

Location Recommended Antenna Separation

Highly reflective warehouse environment 0.33 m (13 in) or 0.64 m (25 in)

Moderately reflective warehouse environment 0.64 m (25 in), 1.22 m (4 ft), or 1.83 m (6 ft)

Open/Office environment 1.22 m (4 ft) to 3.05 m (10 ft)

Positioning Antennas for Dual Radios

These recommendations apply to omni antennas; if you are using gain antennas, you
should increase the separation between the antennas.

If your access point has two 802.11b radios, position the antennas for one radio at

•

least 3.05 m (10 ft) from the antennas for the other radio.

If your access point has two radios and one of the radios is an 802.11b radio, cable

•

the antennas for the 802.11b radio at least 3.05 m (10 ft) from the access point.

2-20

If you are using more than one antenna for one 802.11b radio, position the antennas

•

at least 0.61 m (2 ft) apart.

Positioning Antennas for an OpenAir WAP

If the OpenAir WAP has two radios, you need to use external antennas and position
them at the recommended distances for proper functioning. There are two types of
Intermec-recommended antennas you can use:

Omni

•

Directional

•

You can position the antennas in one of three ways:

Horizontal. Both antennas are mounted in the same plane (at the same height).

•

Stacked. One antenna is mounted directly above the other.

•

Angled. The two antennas are mounted some distance apart and at different heights.

•

You can use two omni antennas, two directional antennas or you can use one omni
antenna and one directional antenna. This table shows the MINIMUM distance that
must exist between the two antennas.

Position 2 Omni Antennas 2 Directional Antennas

Installing the 21XX

1 Omni, 1 Directional
Antenna

2

Horizontal 3dBi omni, 3 m (10 ft)

6dBi omni, 6.1 m (20 ft)
9dBi omni, 12.2 m (40 ft)

Stacked 0.6 m (2 ft) (does not apply) 0.6 m (2 ft)

Angled 1.1 m (3.5 ft) vertically and

7.3 m (24 ft) horizontally

Note these additional points about positioning your antennas:

Mount omni antennas so they point down.

•

If you are using two directional antennas, mount them back-to-back.

•

If you are using one omni antenna and one directional antenna, mount the

•

directional antenna so that it points away from the omni antenna.

If you are using one omni antenna and one directional antenna in the stacked

•

position, mount the directional antenna above the omni antenna.

3 m (10 ft) 6.1 m (20 ft)

0.6 m (2 ft) vertically and
3 m (10 ft) horizontally

0.6 m (2 ft) vertically and

6.1 m (20 ft) horizontally

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MobileLAN access 21XX User’s Manual

2-4

3

Configuring the Ethernet Network

MobileLAN access 21XX User’s Manual

3-2

This chapter explains how to configure the 21XX so that it communicates with your
Ethernet network.

Configuring the TCP/IP Settings

If you are using a DHCP server to automatically assign an IP address to the access
point, go to “Configuring the 21XX as a DHCP Client” in the next section. If you are
not using a DHCP server, you need to manually assign some TCP/IP parameters.

You should have already configured an IP address for the access point. For help,

Note:

see “Configuring the 21XX (Setting the IP Address)” in Chapter 1.

To configure the TCP/IP settings

1. From the menu, click TCP/IP Settings. The TCP/IP Settings screen appears.

Configuring the Ethernet Network

3

2. Configure the TCP/IP settings. For help, see the next table.

3. If you want to configure the access point as a NAT server, see “About Network
Address Translation (NAT)” later in this section.

4. If you want to configure the access point as an ARP server, see “Configuring the
21XX as an ARP Server” later in this section.

5. If you want to configure the access point to send ARP requests, see “Configuring
the 21XX to Send ARP Requests” later in this section.

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MobileLAN access 21XX System Manual

6. If you want to configure the access point as a DHCP server, see “Configuring the
21XX as a DHCP Server” later in this section.

7. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

The following table explains each TCP/IP parameter. The other parameters on this
screen are explained in the next sections.

Parameter Explanation

IP Address Enter the IP address of the access point. The IP address has the form

IP Subnet Mask Enter the subnet mask that matches the other devices in your network.

IP Router (Gateway) Enter the IP address of the router that will forward packets if the access

, where x is a number from 0 to 225.

x.x.x.x

The subnet mask has the form

225.

point will communicate with devices on another subnet. The IP address
has the form

, where x is a number from 0 to 225.

x.x.x.x

, where x is a number from 0 to

x.x.x.x

IP Frame Type This parameter controls the encapsulation of IP frames sent by this

access point. You select either DIX (Ethernet 2.0) or SNAP
encapsulation.

DIX

Encapsulate using DIX (Ethernet 2.0) frames.

SNAP

Encapsulate using SNAP frames. You need to use SNAP if

other network computers use SNAP encapsulation for IP frames.

3-4

Configuring the Ethernet Network

3

Configuring the 21XX as a DHCP Client

You can use a DHCP server to automatically assign an IP address to your access point;
that is, the access point can act as a DHCP client.

You cannot configure the access point as both a DHCP server and a DHCP client.

Note:

To configure the 21XX as a DHCP client

1. From the menu, click TCP/IP Settings. The TCP/IP Settings screen appears.

2. Click the down arrow on the right side of the DHCP Mode field and choose either
“Always Use DHCP” or “Enabled, if IP Address is Zero.” If you choose “Enabled,
if IP Address is Zero, make sure that the IP Address field is 0.0.0.0.

3. In the DHCP Server Name field, enter the name of the DHCP server that the access
point is to access for automatic address assignment. If no server name is specified,
the access point responds to offers from any server.

4. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

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MobileLAN access 21XX System Manual

Configuring the 21XX as a DHCP Server

You can configure the access point as a simple DHCP server that can provide DHCP
server functions for small installations where no other DHCP server is available. The
DHCP server will offer IP addresses to any DHCP client it hears as long as a pool of
unallocated IP addresses is available. These clients may include other access points,
wireless end devices, wired hosts on the distribution LAN, or wired hosts on secondary
LANs.

If you configure the access point as a DHCP server, it is not intended to replace a

Note:

general purpose, configurable DHCP server, and it makes no provisions for
synchronizing DHCP policy between itself and other DHCP servers. Customers with
complex DHCP policy requirements should use other DHCP server software.

You cannot configure the access point as both a DHCP server and a DHCP client.

Note:

To avoid a single point of failure, you can configure more than one access point to be a
DHCP server; however, the access points do not share DHCP client databases. You
should configure each DHCP server with a different DHCP address pool from which to
allocate client addresses.

To configure the 21XX as a DHCP server

1. From the menu, click TCP/IP Settings. The TCP/IP Settings screen appears.

2. Verify that the IP Subnet Mask field and IP Router field are configured. For help,
see “Configuring the TCP/IP Settings” earlier in this chapter.

3-6

Configuring the Ethernet Network

3. Click the down arrow on the right side of the DHCP Mode field and choose “This
AP is a DHCP Server.”

4. Click Submit Changes to save your changes.

5. Click DHCP Server Setup. The DHCP Server Setup screen appears.

3

6. Configure the DHCP server. For help, see the next table.

7. Click Submit Changes to save your changes and then click “here.” To activate your
changes, from the menu bar click Save/Discard Changes and then click Save
Changes and Reboot. For help, see “Saving Configuration Changes” in Chapter 1.

The following table explains each parameter.

Parameter Explanation

Low Address The low IP address in the range of IP addresses available to the DHCP

server for distribution to DHCP clients. If these addresses are not on the
same subnet as the access point, the access point will perform Network
Address Translation (NAT) for the devices to which it grants IP
addresses.

High Address The high IP address in the range of IP addresses available to the DHCP

server for distribution to DHCP clients. If these addresses are not on the
same subnet as the access point, the access point will perform Network
Address Translation (NAT) for the devices to which it grants IP
addresses.

DNS Address 1 The IP address of a Domain Name Server that will be distributed to

DHCP clients. You can enter up to two DNS addresses to be delivered
to DHCP clients.

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MobileLAN access 21XX System Manual

DHCP Server Parameters Table (continued)

Parameter Explanation

DNS Address 2 The IP address of a Domain Name Server that will be distributed to

Lease Time Specifies the duration of the leases that are granted by the DHCP

Supported DHCP Server Options

The DHCP server issues IP address leases to configure this field:

DHCP clients. You can enter up to two DNS addresses to be delivered
to DHCP clients.

server. Enter the lease time in the format days:hours:minutes.

If you set the lease time to 0, infinite leases are granted

IP broadcast address

router, will contain the same values as those configured for the access point.

The IP broadcast address, along with the subnet mask and IP

Unsupported DHCP Server Options

The DHCP server does not support any DHCP options other than those listed. The
DHCP server disregards any DHCP options that are not explicitly required by the
DHCP specification. The DHCP server ignores all packets with a non-zero giaddr
(gateway IP address). The DHCP server only responds to requests from its own subnet.

About Network Address Translation (NAT)

NAT allows IP addresses to be used by more than one device. The access point can act
as a NAT server, which instantaneously rewrites IP addresses and port numbers in IP
headers so that packets all appear to be coming from (or going to) the single IP address
of the access point instead of the actual source or destination.

When a device uses the access point as an IP router, the access point replaces the IP
header, which includes the device’s MAC address, IP source address, and TCP/UDP
port, with its own. You can configure the DHCP server to indicate that the access point
is the IP router when the server allocates an IP address. Special consideration is given to
changing the FTP data connection TCP port number, which is in the body of the TCP
packet. After the packet source is modified, it is forwarded to the proper subnet.

If the destination subnet is not the same subnet as the access point’s Ethernet network,
the destination MAC address is changed to the IP router that has been configured for the
access point. If destination subnet is the same subnet as the access point’s Ethernet
network, the access point converts the MAC address to the MAC address that belongs to
the destination IP address. This may involve using ARP for MAC address discovery.

3-8

When the access point receives a packet with its IP address, it identifies the need for
address translation by inspecting the destination port number. If the port number is
within the pool reserved for NAT operation, it looks up the original MAC address, IP
address, and port number. The packet is then modified and forwarded to the end device.

Configuring the Ethernet Network

NAT operation is disabled or enabled automatically depending on the continuous range
of addresses you enter into the DHCP server. NAT is disabled if the range of addresses
to be given to DHCP clients is on the same subnet as the access point. NAT is enabled if
the range of addresses to be given to DHCP clients is not on the same subnet as the
access point; thus, you are creating a virtual network and the DHCP server will also
perform NAT translation.

When NAT operation is enabled, the access point uses the low address in the range of
addresses as its own. The DHCP/NAT clients also use this address as their router IP
address. These clients can configure the access point using this internal IP address or the
normal external IP address.

To configure the 21XX as a NAT server

1. From the menu, click TCP/IP Settings. The TCP/IP Settings screen appears.

2. Verify that the IP Address field and IP Subnet Mask field are configured. For help,
see “Configuring the TCP/IP Settings” earlier in this chapter.

3. Click the down arrow on the right side of the DHCP Mode field and choose “This
AP is a DHCP Server.”

3

4. Click Submit Changes to save your changes.

5. Click DHCP Server Setup and enter a range of IP addresses that are NOT on the
same subnet as the access point.

6. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

Configuring the 21XX as an ARP Server

The access point maintains an ARP cache, which is a table of known MAC addresses
and associated IP addresses. When an access point receives an ARP request on its
Ethernet port, it checks its ARP cache to determine if the destination IP address is
known. If the destination IP address is known and you have enabled ARP Server mode,
the access point will act as an ARP server.

An ARP request is a multicast packet, which means the packet is sent to all devices on
the network. If the access point is acting as an ARP server, it translates the multicast
packet into a unicast packet, which means that the packet is only sent to the destination
end device. Thus, all wireless end devices do not need to wake up to listen to the ARP
request, which saves battery life.

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MobileLAN access 21XX System Manual

To configure the 21XX as an ARP server

1. From the menu, click TCP/IP Settings. The TCP/IP Settings screen appears.

2. Click the down arrow on the right side of the ARP Server Mode field and choose
No Flooding or Normal Flooding.

To disable the ARP server, choose Disabled.

3. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

Configuring the 21XX to Send ARP Requests

ARP requests are multicast packets, which means they are sent to all devices on the
network. The access point periodically sends an unsolicited ARP request to the default
IP router so that all routers can update their routing tables. This ARP request enables a
network management program to learn about the access point on the network by
querying routers. The auto ARP period controls the time interval between ARP
broadcasts.

If the address of the default IP router is 0.0.0.0, the access point sends an ARP request
to its own IP address. Without this option, an access point might not use its IP address
for extended periods of time and the IP address would expire from the router ARP table.
If the IP address expires, the network management program must ping all potential
addresses on a subnet to locate active IP addresses or require the user to enter a list. You
should not let the IP address for the access point expire.

To set the auto ARP period

1. From the menu, click TCP/IP Settings. The TCP/IP Settings screen appears.

2. In the Auto ARP Minutes field enter a time a period from 1 to 120 minutes. To
disable this parameter, set the time period to 0.

3. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

3-10

Configuring the Ethernet Network

Configuring the Ethernet or Fiber Optic Settings

Many of the standard Ethernet or fiber optic settings are configured in the TCP/IP
Settings screen. For help, see “Configuring the TCP/IP Settings” earlier in this chapter.
In the Ethernet Settings screen, you can

set the port type, if you have both an Ethernet port and a fiber optic port. This field

•

specifies the port that the access point uses to communicate with the Ethernet
network. If you do not have a fiber optic port, you will not see this field.

set the link speed, if you chose the port type to be Ethernet. This field specifies the

•

speed and the duplex mode that the access point uses to communicate with the
Ethernet network. If you chose the port type to be fiber optic, the link speed is
automatically set to 100 Mbps Fiber Optic. If you want the access point to auto­negotiate this field, choose Auto Select. Auto Select is the default setting and should
work for most networks.

enable or disable the link status check. Enable this parameter if you want the access

•

point to periodically check its Ethernet connection. If it loses the connection, this
access point can no longer be the root access point and any end devices that are
connected to this access point (whether or not it is the root) will roam to a different
access point. The access point will attempt to reconnect to the spanning tree through
one of its radio ports. Disable this parameter if this access point must be the root
access point or if it is used as a WAP.

3

set the hello period, which defines how often the access point sends out multicast

•

hello packets so it can dynamically discover and test connections to other routers on
the network. Once this information is learned, the access point and routers can
exchange routing information.

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MobileLAN access 21XX System Manual

To configure the Ethernet or fiber optic settings

1. From the menu, click Ethernet. The Ethernet screen appears.

2. If you have a fiber optic port, click the down arrow on the right side of the Port
Type field and choose which port is connected to the Ethernet network.

3. Click the down arrow on the right side of the Link Speed field and choose the speed
and duplex mode you want this port to use to communicate with the Ethernet or
fiber optic network.

4. Click the down arrow on the right side of the Link Status Check field and choose
Enabled or Disabled.

5. Click down arrow on the right side of the Hello Period field and choose a hello
period of 1, 2, or 3 seconds.

6. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

3-12

Configuring Ethernet Filters

You can set both Ethernet and IP tunnel filters, and you can create protocol filters for
both predefined and user-defined protocol types. In addition, you can define arbitrary
frame filters based on frame content.

For help configuring IP filters, see “Configuring IP Tunnel Filters” in Chapter 4.

Configuring the Ethernet Address Table

You can use the Ethernet address table to list the permanent unicast 802 MAC addresses
that are using the access point that is the designated bridge on the secondary LAN to
communicate to the primary LAN. These addresses become permanent entries in the
route table of the designated bridge on the secondary LAN.

You must enter the MAC addresses of the devices on the secondary LAN that do not

always

You should fill in this table when configuring designated bridges for secondary LANs
so that this access point will not need to flood frames to all the wired stations on the
secondary LAN. If you choose not to use this table, the access point may need to flood
frames to all ports (Ethernet and radio) to learn the path to the MAC address.

initiate communication.

Configuring the Ethernet Network

3

To configure the Ethernet address table

1. From the main menu, click Ethernet and then click Ethernet Filters.

2. Click Address Table. The Address Table screen appears.

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MobileLAN access 21XX System Manual

3. Enter up to 20 MAC addresses. MAC addresses consist of six hex pairs that are
separated by spaces, colons, or hyphens.

4. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

Using Ethernet Frame Type Filters

You can define filters for common networking protocols such as IP, Novell IPX, and

802.2 LLC. You can also set filters that will pass only those Ethernet frame types found

on your network.

You can set the default action for general and specific frame types. For example, you
can set the DIX-Other EtherTypes frame parameter to drop, and then use the subtype
menus to pass only those specific DIX types that are used in your radio network.

You can also set the scope for general and specific frame types. For example, you can
set the action to Drop and the scope to All for DIX-IP-TCP Ports, and then all IP
packets with the TCP type will be dropped even if specific TCP parts are set to pass in
the subtype menus.

Action Set the action to Pass or Drop. If you select Pass, then all frames of that type
are passed. If you select Drop, then all frames of that type are dropped.

Scope Set scope to Unlisted or All. If you select All, then all frames of that type are
unconditionally passed or dropped, depending on the action you specified. If you select
Unlisted, then frames are passed or dropped only if the frame type is not listed in the
predefined or customizable tables.

To set frame type filters

1. From the main menu, click Ethernet and then click Frame Type Filters. The Frame
Type Filters screen appears.

3-14

Frame Type Filters Screen

Configuring the Ethernet Network

3

2. In each frame type field, click the down arrow on the right side of the Action field
and set the action to Pass or Drop.

In each frame type field, click the down arrow on the right side of the Scope field
and set the scope to Unlisted or All.

For help, see the next table.

3. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

4. If you set the Scope field to Unlisted for any of the frame types, you must also
configure predefined subtype filters or customizable subtype filters. For help, see
“Using Predefined Subtype Filters” or “Customizing Subtype Filters” later in this
section.

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MobileLAN access 21XX System Manual

The following table explains various frame types.

Frame Type Explanation

DIX IP TCP Ports
DIX IP UDP Ports
SNAP IP TCP Ports
SNAP IP UDP Ports

DIX IP Other Protocols
SNAP IP Other Protocols

DIX IPX Sockets Novell NetWare protocol over Ethernet II frames.

SNAP IPX Sockets Novell NetWare protocol over 802.2 SNAP frames.

802.3 IPX Sockets Novell NetWare protocol over 802.3 RAW frames.

DIX Other Ethernet Types
SNAP Other Ethernet
Types

802.2 IPX Sockets Novell running over 802.2 Logical Link Control (LLC).

802.2 Other SAPs 802.2 SAPs other than IPX or SNAP.

You cannot filter HTTP, Telnet, SNMP, and ICMP frames because they are used

Note:

Primary Internet Protocol Suite (IP) transport protocols.

IP protocols other than TCP or User Datagram Protocol (UDP).

DIX or SNAP registered protocols other than IP or IPX.

for configuration and management of the access point. Additionally, you cannot filter
broadcast ARP request packets if the target IP address belongs to the local access point
or to an access point in the subtree rooted at the local access point.

3-16

Configuring the Ethernet Network

Using Predefined Subtype Filters

You can configure the access point to pass or drop certain predefined frame subtypes.

To configure predefined subtype filters

1. From the main menu, click Ethernet and then click Predefined Subtype Filters. The
Predefined Subtype Filters screen appears.

3

2. In each frame subtype field, click the down arrow on the right side of the Action
field and choose Pass or Drop.

3. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

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MobileLAN access 21XX System Manual

Customizing Subtype Filters

You can configure the access point to pass or drop certain customized frame subtypes.
You define the action, subtype, and value parameters.

Action Set the action to Pass or Drop. If you select Pass, then all frames of that
subtype and value are passed. If you select Drop, then all frames of that subtype and
value are dropped.

Subtype Selects the frame subtype you wish to configure.

Value The following table describes frame subtypes and their values. The value must

be two hex pairs. You must enter port values as decimals; for example, enter “23.” for
port 23. The access point displays the hexadecimal equivalent in the Value field on the
menu. When a match is found between frame subtype and value, the specified action is
taken.

To customize subtype filters

1. From the main menu, click Ethernet and then click Customizable Subtype Filters.
The Customizable Subtype Filters screen appears.

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2. Click the down arrow on the right side of the Action field and choose Pass or Drop.

3. Click the down arrow on the right side of the SubType field and choose the
customizable frame subtype. For help, see the next table.

4. Click the down arrow on the right side of the Value field and enter the two hex
pairs. For help, see the next table.

Configuring the Ethernet Network

5. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

The following table describes frame subtype filters and their values.

Subtype Value

DIX-IP-TCP-Port Port value in hexadecimal.

DIX-IP-UDP-Port Port value in hexadecimal.

DIX-IP-Protocol Protocol number in hexadecimal.

DIX-IPX-Socket Socket value in hexadecimal.

DIX-EtherType Specify the registered DIX type in hexadecimal.

SNAP-IP-TCP-Port Port value in hexadecimal.

SNAP-IP-UDP-Port Port value in hexadecimal.

SNAP-IP-Protocol Port value in hexadecimal.

SNAP-IPX-Socket Socket value in hexadecimal.

3

SNAP-EtherType SNAP type in hexadecimal. To filter on both SNAP type and OUI, use

advanced filters.

802.3-IPX-Socket Socket value in hexadecimal.

802.2-IPX-Socket Socket value in hexadecimal.

802.2-SAP 802.2 SAP in hexadecimal.

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MobileLAN access 21XX System Manual

Configuring Advanced Filters

You can configure advanced filters if you need more flexibility in your filtering.
Settings for advanced filters execute after those for other filters; that is, advanced filters
are only applied if the frame has passed the other filters.

You can use filter values and filter expressions to minimize network traffic over the
wireless links; however, Intermec recommends that you use advanced Ethernet filters
only if you have an extensive understanding of network frames and their contents. Use
other existing filters whenever possible.

Setting Filter Values

You can associate an ID with a pattern value by selecting a filter and then entering an
ID and a value. All values with the same value ID belong to the same list.

To set the value ID and value

1. From the main menu, click Ethernet and then click Advanced Filters.

2. Click Filter Values. The Filter Values screen appears.

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3. Enter up to 22 value IDs and values.

4. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

Configuring the Ethernet Network

Setting Filter Expressions

You can set filter expressions by specifying parameters for packet filters. You can also
create a filter expression, which is executed in ascending order based on the ExprSeq
values until the access point determines whether to pass or drop the frame.

To set filter expressions

1. From the main menu, click Ethernet and then click Advanced Filters.

2. Click Filter Expressions. The Filter Expressions screen appears.

3

3. Configure the filter expressions parameters. For help, see the next table.

4. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

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MobileLAN access 21XX System Manual

The next table explains each parameter.

Parameter Explanation

ExprSeq
(Expression
Sequence)

Offset Identifies a point inside a bracket where testing for the expression is to

Mask Applies a data pattern to the packet. If the data pattern in the mask

Op (Operation) Performs a logical operation when a data pattern matches a value in the

Chains expressions together for filtering. After you change the
parameter, the statements are reordered and renumbered so the
Expression Sequence order is maintained. The range is from 0 to 255.

This parameter works with the Action parameter; for example, if the
action is set to And, then the next sequence in another expression is
processed.

start. The range is from 0 to 65535.

matches the packet, then the specific action is performed. The mask
indicates the bits that are significant at the specified offset. A bit is
significant if a bit in the mask is set to one. If this field is empty, the
length of the field is determined by the longest value in the Filter
Values menu for the specified value ID. The mask values are entered in
hexadecimal pairs. You can enter 0 to 8 pairs.

Filter Values menu to determine if the specified action should be taken.
Valid operations include:

EQ (equal)

•

NE (not equal)

•

GT (greater than)

•

LT (less than or equal)

•

Value ID Represents a value in the Filter Values menu. The bytes after the packet

offset are compared to the data pattern indicated by the value. Value ID
can be from 0 to 255 and must match one or more value IDs in the
Filter Values menu.

Action Sets the action to Pass, Drop, or And. If you set the action to And, the

filter expression with the next highest sequence is applied.

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Configuring the Ethernet Network

Ethernet Advanced Filter Example

This example shows how to use Ethernet Advanced Filters to discard all DIX IP
multicast frames except those from selected Ethernet devices.

Set the following filter values for this example.

3

Three value entries have a value ID of 3 to demonstrate how to enter a list. All entries
with the same value ID belong to the same list.

The following table explains the values used in the Filter Values.

Value ID Value Description

1 08 00 Check for a DIX IP frame.

2 01 Check for a multicast/broadcast frame.

3 00 c0 b2 00 00 01

00 c0 b2 00 00 02
00 c0 b2 00 00 03

Check for these specific Ethernet device addresses.

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MobileLAN access 21XX System Manual

Set the first filter expression as shown below.

The following table explains the values used in the first filter expression.

Parameter Value Explanation

ExprSeq 1 This is the first expression.

Offset 0 The offset is zero. Look at the first byte of the destination address.

Mask 01 Only check the Ethernet multicast bit.

Op EQ Compare the value at the offset to the value specified on the Filter

Values menu to see if they are equal. (If the value at the offset
equals the specified value on the Filter Values menu, the frame is
multicast, in this example.)

Value ID 2 Use the value from the Filter Values menu whose value ID is 2.

Action And If this filter expression is true, continue to the next expression.

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Configuring the Ethernet Network

Set the second filter expression as shown below.

3

The following table explains the values used in the second filter expression.

Parameter Value Explanation

ExprSeq 2 This is the second expression.

Offset 12 The data for this expression begins at an offset of 12 bytes from

the beginning of the destination address. (Check for DIX IP frame
type, in this example.)

Mask ffff Check two bytes for an exact match.

Op EQ Compare the value at the offset to the value specified on the Filter

Values menu to see if they are equal. (If the value at the offset
equals the specified value on the Filter Values menu, the frame is
DIX IP, in this example.)

Value ID 1 Use the value from the Filter Values menu whose value ID is 1.

Action And If this filter expression is true, continue to the next expression.

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MobileLAN access 21XX System Manual

Set the third filter expression as shown below.

The following table explains the values used in the third filter expression.

Parameter Value Explanation

ExprSeq 3 This is the third expression.

Offset 6 The data for this expression begins at an offset of 6 bytes from

the beginning of the destination address. (Check the source
Ethernet address, in this example.)

Mask ffffffffffff Check six bytes for an exact match.

OP NE Compare the value at the offset to the value specified on the

Filter Values menu to see if they are not equal. (Compare the
source Ethernet address with the list of Ethernet addresses from
the Filter Values menu.)

Value ID 3 Use the value from the Filter Values menu whose value ID is 3.

Action Drop If the source Ethernet address does not match any address in the

list on the Filter Values menu, then drop the frame.

The three expressions combine to form a single compound expression. The compound
expression forms an advanced filter that drops all DIX IP multicast frames except those
from the three Ethernet stations whose addresses are listed on the Filter Values menu.

The default action is always the opposite of the action specified in the last expression. In
this example, the action of the last expression is drop; therefore, the default action is
pass. Any frame that meets the conditions specified in the advanced filter is passed.

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4

Configuring the Spanning Tree

MobileLAN access 21XX User’s Manual

Configuring the Spanning Tree

This chapter explains how to configure the spanning tree parameters, global flooding
parameters, and global RF parameters. It also explains how to configure IP tunnels
and IP tunnel filters.

Configuring the Spanning Tree Parameters

Access points automatically configure themselves into a self-organized network using a
spanning tree topology. As devices are added to or removed from the network, the
access points automatically reconfigure to maintain reliable operation. The spanning
tree provides efficient, loop-free forwarding of frames through the network and allows
rapid roaming of wireless end devices.

To configure the spanning tree parameters

1. From the main menu, click Spanning Tree Settings. The Spanning Tree Settings
screen appears.

4

2. Configure the spanning tree parameters. For help, see the next table.

3. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

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MobileLAN access 21XX System Manual

The following table explains each parameter

Parameter Explanation

AP Name Enter a unique name for this access point. The name can be from 1 to

LAN ID (Domain) Enter the LAN ID. All access points must have the same LAN ID to

Root Priority Determines if this access point is a candidate to become the root of the

16 characters. The default is the access point serial number.

If you have an OpenAir master radio, only the first 11 characters are
used.

participate in the same spanning tree. The LAN ID can be from 0 to

254.

If you are using OpenAir radios, all OpenAir devices in a network must
have the same LAN ID to be able to communicate. Also, if you assign a
LAN ID greater than 15, the access point uses a LAN ID that is the
remainder after dividing the LAN ID by 16. For example, if you set the
LAN ID to 21 or 37, the access point uses 5.

spanning tree. The access point with the highest root priority becomes
the root whenever it is powered on and active.

The root priority can be a value from 0 to 7. If you set the root priority
to 0, the access point can never become the root access point. You
should always set a WAPs root priority to 0.

For more information, see “About the Root Access Point” later in this
section.

Note: If your network contains 6710 and 21XX access points,
configure a 21XX as the root.

IAPP Frame Type Controls the encapsulation of Inner Access Point Protocol (IAPP)

frames sent by this access point. You can select either DIX (Ethernet

2.0) or SNAP encapsulation. Choose SNAP if other network computers
use SNAP encapsulation for IP frames.

Ethernet Bridging Determines how wireless frames are converted to Ethernet frames and

vice versa. Choose Enabled if you want frames to be forwarded directly
to the Ethernet network. On the root access point, this parameter is
always enabled.

Choose Disabled to use data link tunneling. The access point forwards
data from the wireless network encapsulated in OWL data frames to the
root access point. The root access point unencapsulates these frames
and dumps them raw on the Ethernet network. Also, the root access
point encapsulates all Ethernet traffic that is sent to the wireless
network. When access points receive this traffic, they forward it to the
wireless network. This process makes it seem like all wireless traffic is
originating on the root access point’s switch port. You may need to use
data link tunnels to make roaming transparent to network protocols that
are not designed to accommodate roaming.

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Spanning Tree Settings Table (continued)

Parameter Explanation

Configuring the Spanning Tree

4

Secondary LAN
Bridge Priority

Secondary LAN
Flooding

Determines when and if the access point can become the designated
bridge in a secondary LAN. To become a designated bridge, the access
point must have at least one radio configured as a Station node or be
the endpoint of an IP tunnel. The access point that meets either one of
these requirements and has the highest secondary LAN bridge priority
will be the designated bridge.

The secondary LAN bridge priority can be a value from 0 to 7. If you
set the priority to 0, wireless traffic is encapsulated and will use data
link tunneling to the secondary LAN bridge. The secondary LAN
bridge will then forward the data to the primary LAN.

For more information, see “About Secondary LANs and Designated
Bridges” later in this section.

When an access point is the designated bridge in a secondary LAN, this
parameter specifies the types of frames it passes from the primary LAN
to the secondary LAN.

Disabled

Global Flooding screen) enables the Multicast or Unicast Outbound to
Secondary LANs parameter.

Enabled

point (in the Global Flooding screen) disables multicast or unicast
flooding.

Multicast

the Global Flooding screen) disables multicast flooding.

No flooding occurs unless the root access point (in the

Multicast and unicast flooding occurs unless the root access

Multicast flooding occurs unless the root access point (in

Unicast

Global Flooding screen) disables unicast flooding.

Unicast flooding occurs unless the root access point (in the

About the Root Access Point

The root access point is always on the primary LAN and initiates the spanning tree. The
root coordinates the network and distributes global system parameters to other access
points. The root is elected from a group of access points that are designated as root
candidates (access points that are powered on, active, and do not have a root priority of

0). The access point with the highest root priority is the root.

The election process also occurs in the event of a root access point failure. Besides the
root, you should have two or three access points with a non-zero root priority. If two
access points have the same root priority, the access point with the highest Ethernet
address becomes the root. You should configure your network with overlapping
coverage so that the network can automatically recover from any single point of failure.

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MobileLAN access 21XX System Manual

After the root access point is elected, it transmits hello messages on all enabled ports.
The spanning tree forms as other access points receive hello messages and attach to the
network on the optimal path to the root. A non-root access point also transmits hello
messages after it is attached to the network. Each hello message contains the LAN ID of
the access point that originated the message. The protocol does not allow wireless links
to exist between access points that do not have matching LAN IDs.

About Bridging

Wireless end devices operate similarly to other Ethernet products; therefore, all of your
existing Ethernet applications will work with the wireless network without any special
networking software. This illustration shows the access point general architecture. Some
of the significant functions supported at the bridging layer are explained in the next
table.

21XX General Architecture

Management and Configuration

MIB

DHCP

TCP/IP

TFTP

File

System

Configuration Port

RS-232 Connector

HTTP

SNMP

Agent

Telnet

Configuration

Settings

Forwarding

Database

Ethernet

Por t

Ethernet

Connector

Multiport Bridge

Spanning

Tree

Bridging

Radio

Por t 1

Antenna

Connectors

Connectors

Wireless ARP

Server

Radio

Por t 2

Antenna

IP

Por t

21XXT034.eps

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Configuring the Spanning Tree

4

Bridging Layer Functions Table

Function Explanation

Network
Organization

Forwarding The access point maintains a forwarding database of all physical station addresses, and it knows

Access points automatically configure into a self-organized network using a spanning tree
topology. As devices are added to or removed from the network, the access points automatically
reconfigure to maintain reliable operation. The spanning tree provides efficient, loop-free
forwarding of frames through the network and allows rapid roaming of end devices.

The root access point initiates the spanning tree. The root coordinates the network and distributes
common system parameters to other access points and wireless end devices. The root is elected
from a group of access points that are designated as root candidates at the time of installation.
The election process also occurs in the event of a root failure. You can configure your network
with overlapping coverage so that the network automatically recovers from any single point of
failure.

End devices can optionally participate in the spanning tree protocol by explicitly attaching to the
network. As a result, operational parameters are easily distributed, unicast flooding is reduced or
eliminated, and roaming hands-off logic is more robust.

the correct port for each address. The access point updates this database by monitoring source
addresses on each port (backward learning), by receiving explicit attachment messages, and by
examining messages exchanged between access points when wireless end devices roam. The
database also includes the power management status of each end device, which allows the access
point to support the pending message feature of the network. The forwarding database allows the
bridging software to make efficient forwarding decisions.

Switch Support Ethernet switches that do not comply with the 802.1D standard have difficulty handling wireless

end devices that roam between different switched segments. The access point provides data link
tunneling for switches that do not handle roaming. Using data link tunneling, frames for a given
end device always appear on the root access point’s switched segment, regardless of roaming,
and the switch’s routing tables remain stable.

Flooding
Configurations

Pending Messages Wireless end devices may use power management to maintain battery life. These end devices

Filtering Options The access point incorporates extensive filtering capabilities. Basic filters allow you to filter on

When the destination address is unknown, standard LAN bridges flood frames on all ports. Most
wireless end devices supported by the access point operate at lower speeds than Ethernet;
therefore, indiscriminate flooding from a busy Ethernet backbone to an end device can consume
a substantial portion of the available wireless bandwidth and reduce system performance. The
access point allows you to set flooding control options for both unicast and multicast frames to
free up bandwidth and improve system performance.

wake up periodically to receive frames that arrived while their radio was powered down. The
bridging software in the access point provides a pending message delivery service that allows
frames to be held until the end device is ready to receive them.

DIX type, protocol port, socket, or SAP. Advanced filters let you create and group filters based
on data patterns that you define.

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MobileLAN access 21XX System Manual

By default, wireless traffic is not bridged to a remote IP subnet. Any access point on a
remote subnet that can receive IP hello messages can establish an IP tunnel; therefore,
multiple IP tunnels can exist between the root access point and a single remote IP
subnet.

If bridging is disabled, all traffic for end devices is forwarded between access points
using data link encapsulation, which means that the MAC source/destination addresses
correspond to the access points originating/receiving the traffic for the end devices. By
using data link encapsulation, you prevent network monitoring tools and other network
components from detecting end device MAC/IP addresses that belong to the remote
subnet. Intermec strongly recommends using the default setting when you are using IP
tunnels to provide mobility of other routable protocols, such as IPX. In some network
installations, detecting these addresses may generate alarms or cause switches to behave
erroneously. There is no additional forwarding overhead for disabling bridging in this
situation.

If you enable bridging on a remote subnet, a single access point functions as the
designated bridge for the secondary LAN. In this case, only the designated bridge can
establish an IP tunnel. Any other access point on the remote subnet must attach to the
network through the designated bridge. End device MAC/IP addresses are fully visible
on the remote subnet. If you are using IP tunnels to provide mobility for IP and other
non-routable protocols, you can enable bridging on remote IP subnets, because IP has
built-in safeguards and filters for protecting the operation of IP routers and other
network components.

Also, you should enable bridging if the root access point and the Intermec gateway that
supports the Intermec NNL devices are on different IP subnets. You may also need to
enable bridging if your wireless end devices use terminal emulation running the NNL
protocol or if you use wireless end devices that are running both IP and NNL.

About Secondary LANs and Designated Bridges

There are two types of secondary LANs: one type is connected to the primary LAN via
an IP tunnel the other type is connected wirelessly to the primary LAN. For help
configuring IP tunnels, see “Configuring IP Tunnels” later in this chapter. For help
configuring a wireless secondary LAN, see “Configuring WAPs” in Chapter 5.

The access point that is responsible for bridging data between the secondary LAN and
the primary LAN is called the designated bridge. In both types of secondary LANs, the
designated bridge acts the same. The designated bridge must be an access point that has
at least one radio set to Station mode or is the endpoint of an IP tunnel. If more than one
access point meets at least one of these requirements, the access point with the highest
secondary LAN bridge priority is the designated bridge.

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Configuring the Spanning Tree

If an access point has the highest bridge priority on the secondary LAN, but it is not in
the radio coverage area of an access point on the primary LAN, it cannot become the
designated bridge. In this case, an access point with a lower bridge priority that is in the
radio coverage area or an access point on the primary LAN becomes the designated
bridge. If two access points have the same secondary LAN bridge priority, the access
point with the highest Ethernet address becomes the designated bridge. If the designated
bridge goes offline, the remaining access points negotiate to determine which access
point becomes the new designated bridge.

Designated bridges determine if the secondary LAN is bridging or non-bridging. By
enabling the Ethernet bridging parameter on the designated bridge, all wireless traffic
gets dumped raw on the secondary LAN. You should enable bridging if you have wired
hosts on the secondary LAN that must communicate with a wireless device on the
secondary LAN.

You should enable bridging unless the inbound path through a bridge or switch does not
support roaming. Bridges and switches that adhere to the IEEE 802.1D standard support
roaming. Some proprietary VLAN switches and ATM LANE bridges do not support
roaming. If you disable the Ethernet bridging parameter on the designated bridge, the
wireless traffic is encapsulated on the secondary LAN, which eliminates communication
from secondary LAN end devices.

4

If you set the secondary LAN bridge priority to 0 on the designated bridge, you have a
non-bridging secondary LAN; that is, bridging to the secondary LAN is automatically
disabled.

Configuring Global Parameters

Global parameters are configured on the root access point and on any other access point
that is a root candidate (does not have a root priority of 0). The root access point sends
these settings to all other access points on the network. You should set the same global
parameters for the root access point and its backup candidates.

Any global parameters you set on the root access point will override parameters those
you set in other access points.

Configuring Global Flooding

Use global flooding to configure how the access points handle a frame with an unknown
address. Access points try to forward frames to the port with the shortest path to the
destination address. When the access point has not learned the direction of the shortest
path, you can configure it to flood the frames in certain directions to try to locate the
destination address.

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MobileLAN access 21XX System Manual

To configure global flooding

1. From the main menu, click Spanning Tree Settings. The Spanning Tree Settings
screen appears.

2. Click Global Flooding. The Global Flooding screen appears.

3. Configure the Global Flooding parameters. For help, see the next table.

4. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.

4-10

The following table explains each parameter.

Parameter Explanation

Configuring the Spanning Tree

4

Multicast Flood
Mode

Multicast Outbound
to Terminals

Multicast Outbound
to Secondary LANs

Unicast Flood Mode Determines the flooding structure for inbound unicast frames with

Determines the flooding structure for inbound multicast frames with
unknown destination addresses.

Universal

other wireless end device.

Hierarchical

on the primary LAN but not with other wireless end devices.

Disabled

This parameter only applies to 802.11b and OpenAir radios. If
multicast flood mode is not disabled, this parameter specifies if
outbound multicast frames with unknown destination addresses are
flooded toward wireless end devices

If multicast flood mode is not disabled, this parameter specifies if
outbound multicast frames with unknown destination addresses are
flooded toward secondary LANs.

Enabled

serving as designated bridges for the secondary LANs.

Set locally

flooding on their LANs.

unknown destination addresses.

Universal

other wireless end device.

Allows any wireless end device to communicate with any

Allows wireless end devices to communicate with nodes

Prevents flooding.

The root access point controls flooding for all access points

Designated bridges for the secondary LANs control

Allows any wireless end device to communicate with any

Unicast Outbound to
Terminals

Unicast Outbound to
Secondary LANs

Hierarchical

on the primary LAN but not with other wireless end devices.

Disabled

If the unicast flood mode is not disabled, this parameter specifies if
outbound unicast frames with unknown destination addresses are
flooded toward wireless end devices. This parameter only applies to

802.11b and OpenAir radios.

If the unicast flood mode is not disabled, this parameter specifies if
outbound unicast frames with unknown destination addresses are
flooded toward secondary LAN segments.

Enabled

serving as designated bridges for the secondary LANs.

Set locally

flooding on their LANs.

Allows wireless end devices to communicate with nodes

Prevents flooding.

The root access point controls flooding for all access points

Designated bridges for the secondary LANs control

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MobileLAN access 21XX System Manual

Configuring Global RF Parameters

Use global RF parameters to set various parameters on the access points. If you are
configuring the root access point and you set the Set Globally parameter to Enabled, the
value for that parameter is set globally for all access points and wireless end devices in
the network. If you are configuring the root access point and you set the Set Globally
parameter to Disabled or if you are not configuring the root access point, each device
uses its local setting.

To configure global RF parameters

1. From the menu, click Spanning Tree Settings. The Spanning Tree Settings screen
appears.

2. Click Global RF Parameters. The Global RF Parameters screen appears.

4-12

3. Configure the global RF parameters. Click the links in the Global RF Parameters
menu to set more parameters. For help, see the next table.

4. Click Submit Changes to save your changes. To activate your changes, from the
menu bar click Save/Discard Changes and then click Save Changes and Reboot. For
help, see “Saving Configuration Changes” in Chapter 1.