Moxa Technologies AWK-4121 User Manual

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Page 1

AWK-4121 User’s Manual

Edition 8.2, August 2016

www.moxa.com/product

Page 2

AWK-4121 User’s Manual

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The software described in this manual is furnished under a license agreement and may be used only in accordance with

the terms of that agreement.

Trademarks

The MOXA logo is a registered trademark of Moxa Inc.

All other trademarks or registered marks in this manual belong to their respective manufacturers.

Disclaimer

Information in this document is subject to change without notice and does not represent a commitment on the part of

Moxa.

Moxa provides this document as is, without warranty of any kind, either expressed or implied, including, but not limited

to, its particular purpose. Moxa reserves the right to make improvements and/or changes to this manual, or to the

products and/or the programs described in this manual, at any time.

Information provided in this manual is intended to be accurate and reliable. However, Moxa assumes no responsibility for

its use, or for any infringements on the rights of third parties that may result from its use.

This product might include unintentional technical or typographical errors. Changes are periodically made to the

information herein to correct such errors, and these changes are incorporated into new editions of the publication.

Technical Support Contact Information

www.moxa.com/support

-free: 1-888-669-2872

+1-714-528-6777

+1-714-528-6778

+49-89-3 70 03 99-0

+49-89-3 70 03 99-99

+91-80-4172-9088

+91-80-4132-1045

-free: 800-820-5036

+86-21-5258-9955

+86-21-5258-5505

-Pacific

+886-2-8919-1230

+886-2-8919-1231

Page 3

Table of Contents

1. Introduction ...................................................................................................................................... 1-1

Overview ........................................................................................................................................... 1-2

Package Checklist ............................................................................................................................... 1-2

Product Features ................................................................................................................................ 1-2

Product Specifications ......................................................................................................................... 1-3

Functional Design ............................................................................................................................... 1-6

LED Indicators ............................................................................................................................ 1-6

Beeper ....................................................................................................................................... 1-7

Reset Button ............................................................................................................................... 1-8

Relay (Digital Output) .................................................................................................................. 1-8

2. Getting Started ................................................................................................................................. 2-1

First-time Installation and Configuration ................................................................................................ 2-2

Communication Testing ....................................................................................................................... 2-3

Function Guide ................................................................................................................................... 2-4

3. Web Console Configuration ............................................................................................................... 3-1

Configuration by Web Browser ............................................................................................................. 3-2

Overview ........................................................................................................................................... 3-4

Basic Settings .................................................................................................................................... 3-5

System Info Settings ................................................................................................................... 3-5

Network Settings ......................................................................................................................... 3-6

Time Settings ............................................................................................................................. 3-7

Wireless Settings ................................................................................................................................ 3-8

Operation Mode .................................................................................................................................. 3-9

Basic Wireless Settings ........................................................................................................................ 3-9

WLAN Security Settings ............................................................................................................. 3-12

Advanced Wireless Settings ........................................................................................................ 3-18

WLAN Certification Settings (for EAP-TLS in Client mode only) ........................................................ 3-21

Advanced Settings ............................................................................................................................ 3-21

Using Virtual LAN .............................................................................................................................. 3-22

The Virtual LAN (VLAN) Concept .................................................................................................. 3-22

Configuring Virtual LAN .............................................................................................................. 3-23

DHCP Server (for AP mode only) ................................................................................................. 3-24

Packet Filters ............................................................................................................................ 3-25

RSTP Settings (for WDS, Master, or Slave mode only) ................................................................... 3-27

SNMP Agent ............................................................................................................................. 3-29

Link Fault Pass-Through (for Client/Slave mode only) .................................................................... 3-31

Auto Warning Settings ....................................................................................................................... 3-31

System Log .............................................................................................................................. 3-32

Syslog ..................................................................................................................................... 3-32

E-mail ...................................................................................................................................... 3-34

Relay ....................................................................................................................................... 3-35

Trap ........................................................................................................................................ 3-35

Status ............................................................................................................................................. 3-37

Wireless Status ......................................................................................................................... 3-37

Associated Client List (for AP/master mode only) .......................................................................... 3-38

DHCP Client List (for AP mode only) ............................................................................................ 3-38

System Log .............................................................................................................................. 3-39

Relay Status ............................................................................................................................. 3-40

DI and Power Status .................................................................................................................. 3-40

System Status .......................................................................................................................... 3-41

Network Status ......................................................................................................................... 3-41

Maintenance .................................................................................................................................... 3-42

Console Settings ....................................................................................................................... 3-43

Ping ......................................................................................................................................... 3-43

Firmware Upgrade ..................................................................................................................... 3-44

Config Import Export ................................................................................................................. 3-44

Load Factory Default .................................................................................................................. 3-45

Password ................................................................................................................................. 3-45

Misc. Settings ........................................................................................................................... 3-46

Save Configuration ........................................................................................................................... 3-46

Restart ............................................................................................................................................ 3-47

Logout ............................................................................................................................................ 3-47

4. Software Installation/Configuration ................................................................................................. 4-1

Overview ........................................................................................................................................... 4-2

Wireless Search Utility ......................................................................................................................... 4-2

Installing Wireless Search Utility ................................................................................................... 4-2

Configuring the Wireless Search Utility ........................................................................................... 4-5

Page 4

5. Other Console Configurations ............................................................................................................ 5-1

RS-232 Console Configuration (115200, None, 8, 1, VT100) .................................................................... 5-2

Configuration by Telnet and SSH Consoles ............................................................................................. 5-4

Configuration by Web Browser with HTTPS/SSL ...................................................................................... 5-4

Disabling Telnet and Browser Access ..................................................................................................... 5-5

6. References ........................................................................................................................................ 6-1

Wireless Distribution System (WDS) ..................................................................................................... 6-2

Beacon .............................................................................................................................................. 6-3

DTIM ................................................................................................................................................. 6-3

Fragment ........................................................................................................................................... 6-4

RTS Threshold .................................................................................................................................... 6-4

STP and RSTP .................................................................................................................................... 6-4

The STP/RSTP Concept ................................................................................................................ 6-4

Differences between RSTP and STP ................................................................................................ 6-4

7. Supporting Information .................................................................................................................... 7-1

About This User’s Manual ..................................................................................................................... 7-2

DoC (Declaration of Conformity) ........................................................................................................... 7-2

Federal Communication Commission Interference Statement ............................................................ 7-2

R&TTE Compliance Statement ....................................................................................................... 7-3

Firmware Recovery ............................................................................................................................. 7-4

Technical Support Contact Information .................................................................................................. 7-5

Page 5



1. Introduction

Moxa’s AirWorks AWK-4121 enables wireless access to network resources. The AWK-4121 is rated to operate

at temperatures ranging from -40 to 75°C and is rugged enough for any harsh industrial environment.

The following topics are covered in this chapter:

Overview

Package Checklist

Product Features

Product Specifications

Functional Design

 LED Indicators

 Beeper

 Reset Button

 Relay (Digital Output)

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AWK-4121 Introduction

1-2

NOTE

The above items come with the

customized versions.

Overview

The AWK-4121 outdoor wireless Access Point is an ideal solution for industrial applications that are hard to wire,

too expensive to wire, or use mobile equipment that connect to a TCP/IP network.

The AWK-4121 is rated for operation in the temperature range from -40 to 75°C, and its dust-tight and

weatherproof design is IP68-rated. An IP68 rating means the device is completely protected from dust and is

protected against the effects of immersion in water between 15cm and 1m in depth. This means you can set up

a WLAN or extend existing wired networks to outdoor locations and still maintain a reliable connection. The

AWK-4121 has two redundant DC power inputs for increased reliability, can be powered via PoE (discontinued

starting with HW Rev 2.0.0), and is easy to deploy.

Package Checklist

Moxa’s AWK-4121 is shipped with the following items. If any of these items is missing or damaged, please

contact your customer service representative for assistance.

• AWK-4121

• Omni-directional antennas (5/2 dBi, N-type male, 2.4/5 GHz)

• Wall mounting kit

• Field-installable power plug

• Field-installable RJ45 plug

• Metal cap to cover M12 female DI/O connector

• Metal cap to cover RJ45 connector

• Quick installation guide (printed)

• Warranty card

Product Features

• IEEE802.11a/b/g compliant

• Three-in-one design (AP/Bridge/Client)

• Advanced wireless security:

 64-bit and 128-bit WEP encryption, WPA /WPA2-Personal and Enterprise

(IEEE 802.1X/RADIUS, TKIP, and AES)

 SSID enable/disable

 Packet access control & filtering

• STP/RSTP support for redundancy of system networking (for Master and Slave mode only)

• Long-distance transmission support

• Turbo Roaming enables rapid handover (for Client mode only)

• ABC-01 for configuration import/export

• Customized antenna selection

• RS-232 console management

• 2DI+1DO for onsite monitoring and warming

• Operating temperature range from -40 to 75°C

• Power input via PoE (discontinued starting with HW Rev 2.0.0) or redundant 24 VDC power inputs

• Wall mounting ability

AWK-4121 standard version. The package contents may vary in different

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AWK-4121 Introduction

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WLAN Interface

Standards:

Spread Spectrum and Modulation (typical):

• DSSS with DBPSK,

• OFDM with BPSK, QPSK, 16QAM, 64QAM

• 802.11b: CCK @ 11/5.5 Mbps, DQPSK @ 2 Mbps, DBPSK @ 11 Mbps

• 802.11a/g: 64QAM @

Operating Channels (central frequency):

US:

EU:

JP:

Security:

• SSID broadcast enable/disable

• Firewall for MAC/IP/Protocol/Port

• 64

AES)

Transmission Rates:

802.11b: 1, 2, 5.5, 11

802.1

TX Transmit Power (for hardware revision 1.1):

802.11b:

802.11g:

802.11a:

• IP68-rated metal housing

• Waterproof RJ45 connectors and M12 connectors

Product Specifications

IEEE 802.11a/b/g for Wireless LAN

IEEE 802.11i for Wireless Security

IEEE 802.3u for 10/100BaseT(X)

IEEE 802.3af for Power-over-Ethernet

IEEE 802.1D for Spanning Tree Protocol

IEEE 802.1w for Rapid STP

IEEE 802.1Q VLAN

DQPSK, CCK

54/48 Mbps, 16QAM @ 36/24 Mbps, QPSK @ 18/12 Mbps, BPSK @ 9/6 Mbps

2.412 to 2.462 GHz (11 channels)

5.18 to 5.24 GHz (4 channels)

2.412 to 2.472 GHz (13 channels)

5.18 to 5.24 GHz (4 channels)

2.412 to 2.472 GHz (13 channels, OFDM)

2.412 to 2.484 GHz (14 channels, DSSS)

5.18 to 5.24 GHz (4 channels for W52)

-based filtering

-bit and 128-bit WEP encryption, WPA /WPA2 Personal and Enterprise (IEEE 802.1X/RADIUS, TKIP and

Mbps

1a/g: 6, 9, 12, 18, 24, 36, 48, 54 Mbps

Typ. 23±1.5 dBm @ 1 to 11 Mbps

Typ. 20±1.5 dBm @ 6 to 24 Mbps

Typ. 19±1.5 dBm @ 36 Mbps

Typ. 18±1.5 dBm @ 48 Mbps

Typ. 17±1.5 dBm @ 54 Mbps

Typ. 18±1.5 dBm @ 6 to 24 Mbps

Typ. 16±1.5 dBm @ 36 to 48 Mbps

Typ. 15±1.5 dBm @ 54 Mbps

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AWK-4121 Introduction

1-4

RX Sensitivity (for hardware revision 1.1):

802.11b:

802.11g:

802.11a:

TX Transmit Power (for hardware revision 1.0):

802.11b:

802.11g:

802.11a:

-97 dBm @ 1 Mbps

-94 dBm @ 2 Mbps

-92 dBm @ 5.5 Mbps

-90 dBm @ 11 Mbps

-93 dBm @ 6 Mbps

-91 dBm @ 9 Mbps

-90 dBm @ 12 Mbps

-88 dBm @ 18 Mbps

-84 dBm @ 24 Mbps

-80 dBm @ 36 Mbps

-76 dBm @ 48 Mbps

-74 dBm @ 54 Mbps

-90 dBm @ 6 Mbps

-89 dBm @ 9 Mbps

-89 dBm @ 12 Mbps

-85 dBm @ 18 Mbps

-83 dBm @ 24 Mbps

-79 dBm @ 36 Mbps

-75 dBm @ 48 Mbps

-74 dBm @ 54 Mbps

Typ. 18±1.5 dBm @ 1 to 11 Mbps

Typ. 18±1.5 dBm @ 6 to 24 Mbps

Typ. 16±1.5 dBm @ 36 to 48 Mbps

Typ. 15±1.5 dBm @ 54 Mbps

Typ. 16±1.5 dBm @ 6 to 24 Mbps

Typ. 14±1.5 dBm @ 36 to 48 Mbps

Typ. 13±1.5 dBm @ 54 Mbps

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AWK-4121 Introduction

1-5

RX Sensitivity (for hardware revision 1.0):

802.11b:

802.11g:

802.11a:

Protocol Support

General Protocols:

LLDP AP

Interface

Default Antennas:

type (male)

Connector for External Antennas:

LAN Ports:

Console Port:

LED Indicators:

Alarm Contact (digital output, M12 connector): 1 relay output with current carrying capacity of 1 A @ 24

VDC

Digital Inputs (M12 connector):

• +13 to +30 V for state “1”

• +3 to

• Max. input current: 8 mA

Physical Characteristics

Housing:

Weight:

Dimensions:

Installation:

Environmental Limits

Operating Temperature:

Storage Temperature:

Ambient Relative Humidity:

Power Requirements

Input Voltage:

Ethernet (IEEE 802.3af

compliant)

Connector:

-92 dBm @ 1 Mbps

-90 dBm @ 2 Mbps

-88 dBm @ 5.5 Mbps

-84 dBm @ 11 Mbps

-87 dBm @ 6 Mbps

-86 dBm @ 9 Mbps

-85 dBm @ 12 Mbps

-82 dBm @ 18 Mbps

-80 dBm @ 24 Mbps

-76 dBm @ 36 Mbps

-72 dBm @ 48 Mbps

-70 dBm @ 54 Mbps

-87 dBm @ 6 Mbps

-86 dBm @ 9 Mbps

-85 dBm @ 12 Mbps,

-82 dBm @ 18 Mbps,

-80 dBm @ 24 Mbps,

-76 dBm @ 36 Mbps,

-72 dBm @ 48 Mbps,

-70 dBm @ 54 Mbps

Proxy ARP, DNS, HTTP, HTTPS, IP, ICMP, SNTP, TCP, UDP, RADIUS, SNMP, PPPoE, DHCP

-only Protocols: ARP, BOOTP, DHCP, STP/RSTP (IEEE 802.1D/w)

2 dual-band omni-directional antennas, 5 dBi at 2.4 GHz, 2 dBi at 5 GHz, N-

N-type (female)

1, 10/100BaseT(X), auto negotiation speed (waterproof RJ45-type)

RS-232 (waterproof RJ45-type)

PWR, FAULT, STATE, WLAN, LAN

2 electrically isolated inputs

-30 V for state “0”

Metal, IP68 protection

1.5 kg

224 x 147.7 x 64.5 mm (8.82 x 5.82 x 2.54 in)

Wall mounting (standard), DIN-rail mounting (optional), pole mounting (optional)

-40 to 75°C (-40 to 167°F)

-40 to 85°C (-40 to 185°F)

5% to 100% (non-condensing)

12 to 48 VDC, redundant dual DC power inputs or 48 VDC Power-over-

M12 connector with A-coding

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AWK-4121 Introduction

1-6

Power Consumption:

• 0.121 to 0.494 A @ 12 to 48 VDC

• 0.3 A @ 24 VDC

Reverse Polarity Protection:

Standards and Certifications

Safety:

EMC:

Radio:

Note: Please check Moxa’s website for the most up

Reliability

MTBF (mean time between failures):

Warranty

Warranty Period:

Details:

ATTENTION

The AWK

body.

The AWK

trained technician should be enlisted to ensure

safe deployment of

Present

UL 60950-1, EN 60950-1

EN 301 489-1/17, FCC Part 15 Subpart B Class B, EN 55022/55024

EN 300 328, EN 301 893, TELEC

-to-date certification status.

364,564 hours

5 years

See www.moxa.com/warranty

Patent http://www.moxa.com/doc/operations/Moxa_Patent_Marking.pdf

-4121 is NOT a portable mobile device and should be located at least 20 cm away from the human

-4121 is NOT designed for the general public. A well-

AWK-4121 units, and to establish a wireless network.

Functional Design

LED Indicators

The LEDs on the front panel of AWK-4121 provide a quick and easy means of determining the current

operational status and wireless settings.

The FAULT LED indicates system failures and user-configured events. If the AWK-4121 cannot retrieve the IP

address from a DHCP server, the FAULT LED will blink at one-second intervals.

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AWK-4121 Introduction

1-7

ATTENTION

When the LEDs for STATE

intervals, it means the system failed to boot. This may be due to improper operation or uncontrollable issues,

such as an unexpected shutdown during firmware update. To recover th

Recovery” in Chapter 6.

The following table summarizes how to read the device’s wireless settings from the LED displays. More

information is available in Chapter 3 in the “Basic Wireless Settings” section.

LED Color State Description

Front Panel LED Indicators (System)

Power is being supplied

PWR Green

FAULT Red

Green

WLAN

Amber

Green

LAN

Amber

Off Power is not being supplied

Blinking (slow

at 1-sec

intervals)

Blinking (fast

at 0.5-sec

intervals)

Off Error condition does not exist.

On WLAN function is in Client/Slave mode.

Blinking WLAN’s data communication is run in Client/Slave mode

Off WLAN is not in use or not working properly

On WLAN functions in AP/Bridge mode.

Blinking WLAN’s data communication is run in AP/Master mode

Off WLAN is not in use or not working properly.

On LAN port’s 100 Mbps link is active.

Blinking Data is being transmitted at 100 Mbps

Off LAN port’s 100 Mbps link is inactive.

On LAN port’s 10 Mbps link is active.

Blinking Data is being transmitted at 10 Mbps

Off LAN port’s 10 Mbps link is inactive.

(From power inputs 1 or 2, or PoE*).

*Discontinued starting with HW Rev 2.0.0

Cannot get an IP address from the DHCP server

IP address conflict

Beeper

The beeper signals that the system is ready with two short beeps.

(Green), FAULT, and WLAN all light up simultaneously and blink at one-second

e firmware, refer to “Firmware

Page 12

AWK-4121 Introduction

1-8

STEP 1:

Remove the reset button cover.

STEP 2:

Using a pointed object, press and hold the reset

button.

Reset Button

The RESET button is located on the bottom panel of the AWK-4121. You can reboot the AWK-4121 or reset it

to factory default settings by pressing the RESET button with a pointed object such as an unfolded paper clip.

• System reboot: Hold the RESET button down for under 5 seconds and then release.

• Reset to factory default: Hold the RESET button down for over 5 seconds until the STATE LED starts

blinking green. Release the button to reset the AWK-4121.

Relay (Digital Output)

The AWK-4121 has one relay output, which consists of the 2 contacts for the 8-pin M12 connector on the

bottom panel, as shown below. These relay contacts forward system failure and user-configured events.

The two wires attached to the relay contacts form an open circuit when a user-configured event is triggered. If

a user-configured event does not occur, the relay circuit will remain closed. For safety reason, the relay circuit

is kept open when the AWK-4121 is not powered.

The AWK-4121’s relay status is summarized as follows:

Power Status Event Relay

Off – Open

On Yes Open

No Short

Page 13

AWK-4121 Introduction

1-9

Digital Inputs and Relay-out Pin Assignment (8-pin M12 connector)

PIN 1 2 3 4 5 6 7 8

Function DOUT_I DOUT_O DI0+ DI0- DI1+ DI1- reserved reserved

Page 14



2. Getting Started

This chapter explains how to install Moxa’s AirWorks AWK-4121 for the first time, quickly set up your wireless

network, and test whether the connection is running well. With the function guide, you can easily locate the

functions you need.

The following topics are covered in this chapter:

First-time Installation and Configuration

Communication Testing

Function Guide

Page 15

AWK-4121 Getting Started

2-2

NOTE

After you select

4121 will be

reset to factory default settings and the IP address will be reset to

NOTE

Default user name and password:

For security reasons, we strongly recommend changing the default password. To do so, select

Password

First-time Installation and Configuration

Before installing the AWK-4121, make sure all items in the Package Checklist are in the box. In addition, you

will need access to a notebook computer or PC equipped with an Ethernet port. The AWK-4121 has a default IP

address that you must use when connecting to the device for the first time.

Step 1: Select the power source.

The AWK-4121 can be powered by DC power input or PoE (discontinued starting with HW Rev 2.0.0). The

AWK-4121 will use whichever power source you choose.

Step 2: Connect the AWK-4121 to a notebook or PC.

Since the AWK-4121 supports MDI/MDI-X auto-sensing, you can use either a straight-through cable or

crossover cable to connect the AWK-4121 to a computer. The LED indicator on the AWK-4121’s LAN port will

light up when a connection is established.

Step 3: Set up the computer’s IP address.

Choose an IP address on the same subnet as the AWK-4121. Since the AWK-4121’s default IP address is

192.168.127.253, and the subnet mask is 255.255.255.0, you should set the IP address of the computer to

192.168.127.xxx.

Step 4: Use the web-based manager to configure AWK-4121

Open your computer’s web browser and type http://192.168.127.253 in the address field to access the

homepage of the web-based Network Manager. Before the homepage opens, you will need to enter the user

name and password as shown in the following figure. For first-time configuration, enter the default user name

and password and then click on the Login button.

Maintenance Load Factory Default and click the Submit button, the AWK-

192.168.127.253.

User Name: admin

Password: root

, and then follow the on-screen instructions to change the password.

Maintenance

Page 16

AWK-4121 Getting Started

2-3

NOTE

After you click

status

appearing next to the title) and a

will

be shown on the

About 30

seconds are required for the

→

IP: 192.168.127.1

IP: 192.168.127.2

activate the changes, click Restart and then Save and Restart after you change the settings.

Step 5: Select the AWK-4121 operation mode.

By default, the AWK-4121’s operation mode is set to AP. You can change the setting to Client mode in Wireless

Settings

be found in Chapter 3.

Step 6: Test communications.

In the following sections we will describe two test methods that you can use to verify if a network connection

has been established.

Submit to apply your changes, the web page is refreshed (indicated by an “(Updated)”

blinking reminder to restart the device for the new settings to take effect,

upper-right corner of web page, as follows.

AWK-4121 to complete the restart process.

Basic Wireless Settings. Detailed information about configuring the AWK-4121’s operation can

Communication Testing

After installing the AWK-4121 you can run a sample test to make sure that the AWK-4121 and the wireless

connection are functioning normally. Two testing methods are described below. Use the first method if you are

using only one AWK-4121 device, and use the second method if you are using two or more AWK-4121 units.

Testing Method for One AWK-4121

If you are only using one AWK-4121, you will need a second notebook computer equipped with a WLAN card.

Configure the WLAN card to connect to the AWK-4121 (NOTE: the default SSID is MOXA), and change the IP

address of the second notebook (notebook B) so that it is on the same subnet as the first notebook (notebook

A), which is connected to the AWK-4121.

After configuring the WLAN card, establish a wireless connection with the AWK-4121 and open a DOS window

on Notebook B. At the prompt, type

ping <IP address of notebook A>

and then press Enter (see the figure below). A “Reply from IP address …” response means the communication

was successful. A “Request timed out.” response means the communication failed. In this case, recheck the

configuration to make sure the connections are correct.

SSID: Moxa

PING

AWK-4121

IP: 192.168.127.253

Notebook B

Notebook A

Page 17

AWK-4121 Getting Started

2-4

PING

IP: 192.168.127.1

IP: 192.168.127.2

SSID

IP:192.168.127.253

IP: 192.168.127.252

Testing Method for Two or More AWK-4121 Units

If you have two or more AWK-4121s, you will need a second notebook computer (notebook B) equipped with

an Ethernet port. Use the default settings for the first AWK-4121 connected to notebook A and change the

second or third AWK-4121 connected to notebook B to Client mode. Then, configure the notebooks and

AWK-4121s properly.

AWK-4121 / Client

Notebook B

After setting up the testing environment, open a DOS window on notebook B. At the prompt, type

ping <IP address of notebook A>

and then press Enter. A “Reply from IP address …” response means the communication was successful. A “Request timed

out” response means the communication failed. In this case, recheck the configuration to make sure the connections are

correct.

: Moxa

Notebook A

AWK-4121 / AP

Function Guide

The management functions are categorized in a tree and shown in the left field of the web-based management

console. You can efficiently locate the function you need with the following guide.

Page 18

AWK-4121 Getting Started

2-5

Quick overview of the AWK-4121’s status

Basic settings for administering the AWK-4121

Essential settings related to establishing a

wireless network

Advanced features to support additional network

management and secure wired and wireless

communication

Note: These advanced functions are all optional.

Application-oriented device management

functions to set up events, traps, and

reactions via relay warning, e-mail, and

SNMP notification

Note: These functions are all optional.

Real-time status information for monitoring

wired/wireless network performance, advanced

services, and device management functions.

Functions for maintaining the AWK-4121, and for

diagnosing the network.

On-demand functions to support the web-based

console management operation.

Page 19



3. Web Console Configuration

In this chapter, we will explain each web management page of the web-based console configuration. Moxa’s

easy-to-use management functions will help you set up your AWK-4121, as well as establish and maintain your

wireless network easily.

The following topics are covered in this chapter:

Configuration by Web Browser

Overview

Basic Settings

 System Info Settings

 Network Settings

 Time Settings

Wireless Settings

Operation Mode

Basic Wireless Settings

 WLAN Security Settings

 Advanced Wireless Settings

 WLAN Certification Settings (for EAP-TLS in

Client mode only)

Advanced Settings

Using Virtual LAN

 The Virtual LAN (VLAN) Concept

 Configuring Virtual LAN

 DHCP Server (for AP mode only)

 Packet Filters

 RSTP Settings (for WDS, Master, or Slave

mode only)

 SNMP Agent

 Link Fault Pass-Through (for Client/Slave

mode only)

Auto Warning Settings

 System Log

 Syslog

 E-mail

 Relay

 Trap

Status

 Wireless Status

 Associated Client List (for AP/master mode

only)

 DHCP Client List (for AP mode only)

 System Log

 Relay Status

 DI and Power Status

 System Status

 Network Status

Maintenance

 Console Settings

 Ping

 Firmware Upgrade

 Config Import Export

 Load Factory Default

 Password

 Misc. Settings

Save Configuration

Restart

Logout

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NOTE

To use the AWK

management and monitoring functions from a PC host connected to the same LAN as

the AWK

4121 are on the same logical subnet. Similarly,

if the AWK

sure your PC host is on the management

VLAN.

The Moxa AWK

Configuration by Web Browser

Moxa AWK-4121’s web browser interface provides a convenient way to modify its configuration and access the

built-in monitoring and network administration functions. The recommended web browser is Microsoft

Internet Explorer 7.0 or 8.0 with JVM (Java Virtual Machine) installed.

Follow the steps below to access the AWK-4121’s web-based console management.

1. Open your web browser (e.g.: Internet Explorer) and type the AWK-4121’s IP address in the address field.

Then press Enter to establish the connection.

2. The Web Console Login page will open. Enter the password (User Name is set as admin; the default

password is root if a new password has not been set.) and then click Login to continue.

-4121’s

-4121, you must make sure that the PC host and AWK-

-4121 is configured for other VLAN settings, you must make

-4121’s default IP address is 192.168.127.253.

You may need to wait a few moments for the web page to download onto your computer. Please note that the

model name and IP address of your AWK-4121 are both shown in the title of the web page. This information can

help you identify multiple AWK-4121s.

You can use the menu tree on the left side of the window to open the function pages to access each of

AWK-4121’s functions.

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ATTENTION

The model name of the AWK

country code represents the AWK

example in the following figures. The country code for the model name on your screen may vary if you are using

a different version (band) AWK

ATTENTION

For security reasons, you will need to log back into the AWK

In the following paragraphs, we will go through each of the AWK-4121’s management functions in detail. You

can also get a quick overview of these functions in the Function Guide section of Chapter 2.

-4121 is shown as AWK-4121-XX where XX indicates the country code. The

-4121 version and which bandwidth it uses. We use AWK-4121-US as an

-4121.

-4121 after the 5-minute time-out.

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NOTE

The 802.11 info that is displayed may be different for different operation modes. For example, “Current BSSID”

is not available in Client mode, and “Signal strength” is not available in AP mode.

Overview

The Overview page summarizes the AWK-4121’s current status. The information is categorized into the

following groups: System info, Device info, and 802.11 info.

Click on SSID for more detailed 802.11 information, as shown in the following figure.

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Basic Settings

The Basic Settings group includes the most commonly used settings required by administrators to maintain and

control the AWK-4121.

System Info Settings

The System Info items, especially Device name and Device description, are displayed and included on the

Overview page, SNMP information, and alarm emails. Setting System Info items makes it easier to identify

the different AWK-4121s connected to your network.

Device name

Format Description Factory Default

Max. 31 Characters This option is useful for specifying the role or application of

different AWK-4121 units.

AWK-4121_<Serial

No. of this

AWK-4121>

Device location

Format Description Factory Default

Max. 31 Characters This specifies the location of different AWK-4121 units. None

Device description

Format Description Factory Default

Max. 31 Characters Use this space to record more detailed description of

AWK-4121.

Device name

Format Description Factory Default

Max. 31 Characters To provide information about whom to contact in order to

resolve problems, use this space to record contact information

of the person responsible for maintaining this AWK-4121.

None

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The IP address of the DNS Server used by your network. After

4121’s URL (e.g., http://ap11.abc.com) in your browser’s

address field instead of entering the IP address. The Secondary

Network Settings

The Network Settings configuration allows you to modify the usual TCP/IP network parameters. An

explanation of each configuration item is given below.

IP configuration

Setting Description Factory Default

DHCP The AWK-4121’s IP address will be assigned automatically by

the network’s DHCP server

Static Set up the AWK-4121’s IP address manually.

Static

IP address

Setting Description Factory Default

AWK-4121’s IP address Identifies the AWK-4121 on a TCP/IP network. 192.168.127.253

Subnet mask

Setting Description Factory Default

AWK-4121’s subnet

mask

Gateway

Setting Description Factory Default

AWK-4121’s default

gateway

Primary/ Secondary DNS server

Setting Description Factory Default

IP address of Primary/

Secondary DNS server

Identifies the type of network to which the AWK-4121 is

connected (e.g., 255.255.0.0 for a Class B network, or

255.255.255.0 for a Class C network).

The IP address of the router that connects the LAN to an

outside network.

entering the DNS Server’s IP address, you can input the

AWK-

DNS server will be used if the Primary DNS server fails to

connect.

255.255.255.0

None

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NOTE

The AWK

lock (RTC). Users are strongly recommended to update the Local time for the

AWK

term shutdown, especially when the network does not have an Internet

connection for accessing the NTP server or there is no NTP server on the L

The time zone setting allows conversion from GMT (Greenwich

ATTENTION

Changing the time zone will automatically adjust the Current local time. You should configure the Time zone

before setting the Current local time.

Time Settings

The AWK-4121 has a time calibration function based on information from an NTP server or user specified Date

and Time information. Functions such as Auto warning can add real-time information to the message.

Current local time shows the AWK-4121’s system time when you open this web page. You can click on the

Set Time button to activate the update after setting up the date and time parameters. An “(Updated)” string

will appear to indicate that the change is complete. Local time settings will be immediately activated in the

system without running Save and Restart.

Current local time

Setting Description Factory Default

User adjustable time The date and time parameters allow configuration of the local

Time zone

Setting Description Factory Default

User selectable time

zone

Daylight saving time

Setting Description Factory Default

Enable/ Disable Daylight saving time (also known as DST or summer time)

-4121 has a real-time c

-4121 after initial setup or long-

time with immediate activation.

Mean Time) to local time.

involves advancing clocks (usually 1hour) during the summer

time to provide an extra hour of daylight in the afternoon.

AN.

None

(yyyy/mm/dd

hh:mm:ss format;

24-hour format.)

GMT (Greenwich

Mean Time)

Disable

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IP or Domain address of NTP time server. The 2nd time will be

This parameter determines how often the time is updated from

NOTE

Although it is more convenient to use dynamic bridging, there is a

(such as IPX and AppleTalk) are not forwarded.

When Daylight Saving Time is enabled, the following parameters are shown:

• The Starts at parameter allows users to enter the date that daylight saving time begins.

• The Stops at parameter allows users to enter the date that daylight saving time ends.

• The Time offset parameter indicates how many hours forward the clock should be advanced.

Time server 1/ 2

Setting Description Factory Default

The 1st/ 2nd time

server IP/Name

Query period

Setting Description Factory Default

Query period time

(1- 9999 seconds)

used if the 1st NTP server fails to connect.

the NTP server.

time.nist.gov

600 (seconds)

Wireless Settings

The essential settings for wireless networks are presented in this function group. Settings must be properly set

before establishing your wireless network. Familiarize yourself with the following terms before starting the

configuration process:

AP/Bridge: This mode provides both Access Point and Static LAN-to-LAN Bridging functionality. The static

LAN-to-LAN bridging function is supported by the Wireless Distribution System (WDS).

Client: This mode is for Dynamic LAN-to-LAN Bridging or Device-to-LAN scenarios. The Client automatically

establishes bridge links with other APs.

In either AP/Bridge or Client mode, the AWK-4121 forwards packets between its Ethernet interface (LAN) and

wireless interface (WLAN) to connect wired hosts on the Ethernet side with wireless host(s) on the wireless side.

There are two types of wireless links specified by the IEEE802.11 standard:

• STA-AP: This type of wireless link is established between an IEEE802.11 Station (STA) and an IEEE802.11

Access Point (AP). An STA is usually a client computer (PC or PDA) with a WLAN network interface card

(NIC). The Client mode is actually an STA.

• WDS: This type of wireless link is established between two IEEE802.11 APs. Wireless packets transmitted

along the WDS link comply with the IEEE802.11 WDS (Wireless Distribution System) format at the link layer.

Refer to the “Wireless Distribution System (WDS)” section in Chapter 5 for details. Keep in mind that

WPA/WPA2 CANNOT be supported in WDS.

To establish a static bridge link based on the WDS, the APs at both end of the WDS link must be configured

manually with each other’s MAC addresses. To establish a dynamic bridge link between an AP and a Client, both

devices must be configured with the same channel, and security settings (see “WLAN Security Settings” for

details). Moreover, the same SSID is also needed for clients that roam the APs in Bridge mode. The Client

automatically scans for any AP that is using the matched SSID and establishes a bridge link with the scanned

AP.

When the AWK-4121 is configured for Client mode, it can be used as an Ethernet-to-wireless (or LAN-to-WLAN)

network adapter. For example, a notebook computer equipped with an Ethernet adaptor but no wireless card

can be connected to this device with an Ethernet cable to provide wireless connectivity to another AP.

-based packets between its wireless interface (WLAN) and Ethernet interface (LAN); other types of traffic

limitation—the Client can only transmit

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The RF (Radio Frequency) module can be manually turned on or

4121 plays the role of wireless

Operation Mode

The AWK-4121 supports four main operation modes—Client, AP, Master, and Slave—each of which plays a

distinct role on the wireless network.

Wireless Enable

Setting Description Factory Default

Enable/Disable

off. This function is available in AP operation mode only.

Enable

Operation Mode

Setting Description Factory Default

AP The AWK-4121 plays the role of wireless AP/Bridge AP

Client The AWK-4121 plays the role of wireless Client

Master This mode collocates with AWK-5222/5232/6222/6232’s

Wireless bridge mode. The AWK-

Master.

Slave This mode collocates with AWK-5222/5232/6222/6232’s

Wireless bridge mode. The AWK-

Slave.

Basic Wireless Settings

The “WLAN Basic Setting Selection” panel is used to add and edit SSIDs. An SSID is a unique identifier that

wireless networking devices use to establish and maintain wireless connectivity. Multiple access points on a

network or sub-network can use the same SSIDs. You can configure your AWK to use up to 9 SSIDs, and

configure each SSID differently. All of the SSIDs are active at the same time; that is, client devices can use any

of the SSIDs to associate with the access point.

Click on Add SSID to create more SSIDs.

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NOTE

When you switch to Client mode, a Site Survey button will be available on the Basic Wireless Settings panel.

Click the “Site Survey” button to view information about available APs, as shown in the following figure. You can

click on the SSID of an entity and bring the value of its SSID onto the SSID field of the Basic Wireless Settings

page. Click the Refresh button to re

Click on Edit to assign different configuration settings to each SSID. The configuration panel appears as

follows:

-scan and update the table.

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NOTE

If the

reminding you to set the default gateway when

mode is enabled. You can ignore this message if you are

only planning a local n

Available channels vary

The SSID of a client and the SSID of the AP must be identical for

NOTE

The AWK

hidden APs in all IEEE802.11a channels

and IEEE802.11g channel 1 to 11. The AWK

SSID

NOTE

When

The AWK-4121 provides 8 entities for WDS settings and can support up to 8 WDS links to other APs or wireless

bridges. The list appears when WDS

Remember to activate a WDS link by checking the

Gateway field in Basic Settings  Network Settings is empty, a warning message will appear,

Client

etwork and no packets will be sent outside the network.

RF type

Setting Description Factory Default

A Supports IEEE802.11a standard only B/G Mixed

B Supports IEEE802.11b standard only

G Supports IEEE802.11g standard only

B/G Mixed Supports both of IEEE802.11b/g standards, but 802.11g can

be slowed down when 802.11b clients are on the network

Channel (for AP/Master mode only)

Setting Description Factory Default

AWK-4121 plays a role of wireless AP. 6 (in B/G Mixed

with RF type

SSID

Setting Description Factory Default

Max. 31 Characters

them to communicate with each other.

SSID broadcast (for AP/Master mode only)

Setting Description Factory Default

Enable/ Disable SSID can be broadcast or not. Enable

mode)

MOXA

WDS (for AP mode only)

Setting Description Factory Default

Enable/ Disable AWK-4121 supports WDS or not. Disable

-4121-JP (for Japanese frequency bands) only connects SSID-

-4121-EU (for European frequency bands) only connects

-hidden APs in all IEEE802.11b/g channels.

WDS is enabled, you can choose to use a pure point-to-point WDS link by disabling AP functionality

Enable is checked. Enter the MAC address to set up a WDS link.

Active check box.

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WLAN Security Settings

The AWK-4121 provides four standardized wireless security modes: Open, WEP (Wired Equivalent Privacy),

WPA (Wi-Fi Protected Access) and WPA2. Several types of security models are available in AWK-4121 by

selecting Security mode and the WPA type:

• Open: No authentication, no data encryption.

• WEP: Static WEP (Wired Equivalent Privacy) keys must be manually configured.

• WPA/WPA2-Personal: Also known as WPA/WPA2-PSK. You need to specify the Pre-Shared Key in the

Passphrase field, which will be used by the TKIP or AES engine as a master key to generate keys that

actually encrypt outgoing packets and decrypt incoming packets.

• WPA/WPA2-Enterprise: Also called WPA/WPA2-EAP (Extensible Authentication Protocol). In addition to

device-based authentication, WPA/WPA2-Enterprise enables user-based authentication via IEEE802.1X.

The AWK-4121 can support three EAP methods: EAP-TLS, EAP-TTLS, and EAP-PEAP.

Security mode

Setting Description Factory Default

Open No authentication Open

WEP Static WEP is used

WPA* WPA is used

WPA2* Fully supports IEEE802.11i with “TKIP/AES + 802.1X”

* WPA and WPA2 cannot be supported in WDS (Bridge) mode.

Open

For security reasons, it is highly recommended that the security mode should be set to the options other than

Open System. When the security mode is set to Open System, no authentication or data encryption will be

performed.

WEP

According to the IEEE802.11 standard, WEP can be used for authentication and data encryption

(confidentiality). Shared (or Shared Key) authentication type is used if WEP authentication and data

encryption are both needed. Normally, Open (or Open System) authentication type is often used when WEP

data encryption is run with authentication.

When WEP is enabled as a security mode, the length of a key (so-called WEP seed) can be specified as 64/128

bits, which is actually a 40/104-bit secret key with a 24-bit initialization vector. The AWK-4121 provides 4

entities of WEP key settings that can be selected to use with Key index. The selected key setting specifies the

key to be used as a send-key for encrypting traffic from the AP side to the wireless client side. All 4 WEP keys

are used as receive-keys to decrypt traffic from the wireless client side to the AP side.

The WEP key can be presented in two Key types, HEX and ASCII. Each ASCII character has 8 bits, so a 40-bit

(or 64-bit) WEP key contains 5 characters, and a 104-bit (or 128-bit) key has 13 characters. In hex, each

character uses 4 bits, so a 40-bit key has 10 hex characters, and a 128-bit key has 26 characters.

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Authentication type

Setting Description Factory Default

Open Data encryption is enabled, but no authentication Open

Shared Data encryption and authentication are both enabled.

Key type

Setting Description Factory Default

HEX Specifies WEP keys in hex-decimal number form HEX

ASCII Specifies WEP keys in ASCII form

Key length

Setting Description Factory Default

64 bits Uses 40-bit secret keys with 24-bit initialization vector 64 bits

128 bits Uses 104-bit secret key with 24-bit initialization vector

Key index

Setting Description Factory Default

1-4 Specifies which WEP key is used Open

WEP key 1-4

Setting Description Factory Default

ASCII type:

64 bits: 5 chars

128 bits: 13chars

HEX type:

64 bits: 10 hex chars

128 bits: 26 hex chars

A string that can be used as a WEP seed for RC4 encryption

engine.

None

WPA/WPA2-Personal

WPA (Wi-Fi Protected Access) and WPA2 are significantly improved encryption methods of WEP. WPA is a

security standard based on 802.11i draft 3, while WPA2 is based on the fully ratified version of 802.11i. The

initial vector is transmitted, encrypted, and enhanced with its 48 bits, twice as long as WEP. The key is regularly

changed so for added security.

Even though AES encryption is only included in the WPA2 standard, it is widely available in the WPA security

mode of some wireless APs and clients as well. The AWK-4121 also supports AES algorithms in WPA and WPA2

for better compatibility.

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NOTE

The value for key renewal instructs the wireless AP how often it should change the encryption keys. Usually the

security level will be higher if you set this value shorter so that the encryption keys are changed more often.

Default value is 3600 seconds (6 minutes). Lon

Personal versions of WPA/WPA2, also known as WPA/WPA-PSK (Pre-Shared Key), provide a simple way of

encrypting a wireless connection for high confidentiality. A passphrase is used as a basis for encryption

methods (or cipher types) in a WLAN connection. The passphrases should be complex and as long as possible.

The number of ASCII characters of the Passphrase must be at least 8 and can go up to 63. For security reason,

this passphrase should be disclosed to the relevant users only and changed regularly.

WPA type

Setting Description Factory Default

Personal Provides Pre-Shared Key-enabled WPA and WPA2 Personal

Enterprise Provides enterprise-level security for WPA and WPA2

Encryption method

Setting Description Factory Default

TKIP Temporal Key Integrity Protocol is enabled AES

AES Advance Encryption System is enabled

Mixed* Provides TKIP broadcast key and TKIP+AES unicast key for

some legacy clients. This option is rarely used.

*This option is available in AP/Master mode only, and cannot support AES-enabled clients.

Passphrase

Setting Description Factory Default

8 – 63 characters Master key to generate keys for encryption and decryption None

Key renewal (for AP/Master mode only)

Setting Description Factory Default

60 – 86400 seconds

(1 minute to 1 day)

Specifies the time period of group key renewal 3600 (seconds)

ger time periods can be considered if traffic is not so busy.

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WPA/WPA2-Enterprise (for AP/Master mode)

By selecting WPA type as Enterprise, you can use EAP (Extensible Authentication Protocol), a framework

authentication protocol used by 802.1X to provide network authentication. In these Enterprise-level security

modes, a back-end RADIUS (Remote Authentication Dial-In User Service) server is needed if IEEE 802.1X

functionality is enabled in WPA /WPA2. The IEEE 802.1X protocol also offers the possibility of carrying out an

efficient connection authentication in a large-scaled network. It is not necessary to exchange keys or pass

phrases.

WPA type

Setting Description Factory Default

Personal Provides Pre-Shared Key-enabled WPA and WPA2 Personal

Enterprise Provides enterprise-level security for WPA and WPA2

Encryption method

Setting Description Factory Default

TKIP Temporal Key Integrity Protocol is enabled AES

AES Advance Encryption System is enabled

Mixed Provides TKIP broadcast key and TKIP+AES unicast key for

some legacy clients. This option is rarely used.

*This option is available in AP/Master mode only, and cannot support AES-enabled clients.

Primary/ Secondary RADIUS server IP

Setting Description Factory Default

The IP address of

RADIUS server

Primary/ Secondary RADIUS port

Setting Description Factory Default

Port number Specifies the port number of the delegated RADIUS server 1812

Specifies the delegated RADIUS server for EAP None

Primary/ Secondary RADIUS shared key

Setting Description Factory Default

Max. 31 characters The secret key shared between AP and RADIUS server None

Key renewal

Setting Description Factory Default

60 – 86400 seconds

(1 minute to 1 year)

Specifies the time period of group key renewal 3600 (seconds)

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WPA/WPA2-Enterprise (for Client/Slave mode)

In a client role, the AWK-4121 can support three EAP methods (or EAP protocols): EAP-TLS, EAP-TTLS, and

EAP-PEAP, corresponding to WPA/WPA-Enterprise settings on the AP side.

Encryption method

Setting Description Factory Default

TKIP Temporal Key Integrity Protocol is enabled AES

AES Advance Encryption System is enabled

EAP Protocol

Setting Description Factory Default

TLS Specifies Transport Layer Security protocol TLS

TTLS Specifies Tunneled Transport Layer Security

PEAP Specifies Protected Extensible Authentication Protocol, or

Protected EAP

Before choosing the EAP protocol for your WPA/WPA2-Enterpise settings on the client end, please contact the

network administrator to make sure the system supports the protocol on the AP end. Detailed information on

these three popular EAP protocols is presented in the following sections:

EAP-TLS

TLS is the standards-based successor to the Secure Socket Layer (SSL). It can establish a trusted

communication channel over a distrusted network. TLS provides mutual authentication through certificate

exchange. EAP-TLS is also secure to use. You are required to submit a digital certificate to the authentication

server for validation, but the authentication server must also supply a certificate.

You can use Basic Wireless Settings  WLAN Certificate Settings to import your WLAN certificate and

enable EAP-TLS on the client end.

You can check the current certificate status in Current Status if it is available.

Certificate issued to: Shows the certificate user

Certificate issued by: Shows the certificate issuer

Certificate expiration date: Indicates the expiration date of the certificate

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EAP-TTLS

It is usually much easier to re-use existing authentication systems, such as a Windows domain or Active

Directory, LDAP directory, or Kerberos realm, rather than creating a parallel authentication system. As a result,

TTLS (Tunneled TLS) and PEAP (Protected EAP) are used to support the use of so-called “legacy authentication

methods.”

TTLS and PEAP work in a similar way. First, they establish a TLS tunnel, like EAP-TLS, and validate whether the

network is trustworthy with digital certificates on the authentication server. This step is run to establish a

tunnel that protects the next step (or “inner” authentication) so it is sometimes referred to as the “outer”

authentication. Then the TLS tunnel is used to encrypt an older authentication protocol that authenticates the

user for the network.

As you can see, digital certificates are still needed for the outer authentication in a simplified form. Only a small

number of certificates are required, which can be generated by a small certificate authority. Certificate

reduction makes TTLS and PEAP much more popular than EAP-TLS.

The AWK-4121 provides some non-cryptographic EAP methods including PAP, CHAP, MS-CHAP, and

MS-CHAP-V2. These EAP methods are not recommended for direct use on wireless networks. However, they

may be useful as inner authentication methods with TTLS or PEAP.

Because the inner and outer authentications can use distinct user names in TTLS and PEAP, you can use an

anonymous user name for the outer authentication, while the true user name is shown only through the

encrypted channel. Remember, not all client software supports anonymous altercation. Confirm this with the

network administrator before you enable identity hiding in TTLS and PEAP.

TTL Inner Authentication

Setting Description Factory Default

PAP Password Authentication Protocol is used MS-CHAP-V2

CHAP Challenge Handshake Authentication Protocol is used

MS-CHAP Microsoft CHAP is used

MS-CHAP-V2 Microsoft CHAP version 2 is used

Anonymous

Setting Description Factory Default

Max. 31 characters A distinct name used for outer authentication None

User name & Password

Setting Description Factory Default

User name and password used in inner authentication None

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PEAP

There are a few differences in the inner authentication procedures for TTLS and PEAP. TTLS uses the encrypted

channel to exchange attribute-value pairs (AVPs), while PEAP uses the encrypted channel to start a second EAP

exchange inside of the tunnel. The AWK-4121 provides MS-CHAP-V2 merely as an EAP method for inner

authentication.

Inner EAP protocol

Setting Description Factory Default

MS-CHAP-V2 Microsoft CHAP version 2 is used MS-CHAP-V2

Anonymous

Setting Description Factory Default

Max. 31 characters A distinct name used for outer authentication None

User name & Password

Setting Description Factory Default

User name and password used in inner authentication None

Advanced Wireless Settings

Additional wireless-related parameters are presented in this section to help you set up your wireless network

in detail.

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4121 sends out a Delivery Traffic

pecifies the maximum size a data packet before splitting and

the Access Point

NOTE

You can refer to the related glossaries in Chapter 5 for more detailed information about the above-mentioned

settings. By setting these parameters properly, you can better tune the performance of your wireless network.

Distance or max. range

The distance specifies the transmission distance or max. range

Adjusts the interference coping capability of the wireless signal.

Transmission Rate

Setting Description Factory Default

Auto The AWK-4121 will senses and adjusts the data rate

automatically

Available rates User can manually select a target transmission data rate

Transmission Power

Setting Description Factory Default

Available Transmission

Power

RF Type Vs. Transmission Power Range

Setting Description Factory Default

A 1~17 dBm 12 dBm

B 1~22 dBm

G 1~22 dBm

B/G Mixed 1~22 dBm

Beacon Interval (for AP/Master mode only)

Setting Description Factory Default

Beacon Interval

(40-1000 ms)

Specifies wireless signal coverage by automatically selecting

the strength of Tx power

This value indicates the frequency interval of the beacon 100 (ms)

Auto

12 dBm

DTIM Interval (for AP/Master mode only)

Setting Description Factory Default

Data Beacon Rate

(1-15)

Fragmentation threshold

Setting Description Factory Default

Fragment Length

(256-2346)

RTS threshold

Setting Description Factory Default

RTS/CTS Threshold

(256-2346)

Transmission distance

Setting Description Factory Default

for transmission

11000 m)

(500-

Indicates how often the AWK-

Indication Message

creating another new packet

Determines how large a packet can be before

coordinates transmission and reception to ensure efficient

communication

between two AWK devices. This parameter should be set

properly, especially for long-distance communication.

2346

500

Noise protection

Setting Description Factory Default

Enable/Disable

This option should be enabled for communication distances

below 500 meters, and should be disabled for communication

distances over 500 meters.

Disable

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NOTE

Make sure the same

Bridges

distance

transmission.

WMM is a QoS standard for WLAN traffic. Voice and video data

. When this parameter is more than 500, an optimal algorithm will be enabled to support long-

Antenna

Setting Description Factory Default

Auto The AWK-4121 uses two antennas (MAIN and AUX) and

MAIN Diversity function is disabled. Only MAIN antenna is in use.

AUX Diversity function is disabled. Only AUX antenna is in use.

EAPOL version

Setting Description Factory Default

1 EAPOL version 1 was standardized in the 2001 version of

2 EAPOL version 2 was specified in 802.1X-2004.

WMM

Setting Description Factory Default

Enable/ Disable

Transmission distance parameters are set in both AP and Client sides, and both

Auto

enables the diversity function for reducing multipath effects.

802.1X, which is much more commonly implemented.

will be given priority bandwidth when enabled with WMM

supported wireless clients.

Disable

Full 11a channel support

Setting Description Factory Default

Enable/ Disable “Full 11a channel support” allows users to select one channel

from 802.11a, including channels in licensed and unlicensed

bands.

Turbo Roaming (for Client mode only)

Setting Description Factory Default

Enable/ Disable Moxa’s Turbo Roaming can enable rapid handover when the

AWK-4121, as a client, roams among a group of APs.

When Turbo Roaming is enabled, RF type and Scan channels will be shown as follows. RF type shows the

current RF type, which this client is using now. You can set up Scan channels for the APs among which this

client is going to roam. There are three Scan channels available. Please note that the Scan channels may need

to be modified when the RF type is changed. (For example, channel 36 is not available in B, G or B/G Mix

mode.)

Disable

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NOTE

The WLAN certificate

4121 reboots. Even though it is expired, it can still be seen on

Current Certificate.

WLAN Certification Settings (for EAP-TLS in Client mode only)

When EAP-TLS is used, a WLAN Certificate will be required at the client end to support WPA/WPA2-Enterprise.

The AWK-4121 can support the PKCS #12, also known as Personal Information Exchange Syntax Standard,

certificate formats that define file formats commonly used to store private keys with accompanying public key

certificates, protected with a password-based symmetric key.

Current status displays information for the current WLAN certificate, which has been imported into the

AWK-4121. Nothing will be shown if no certificate is available.

Certificate issued to: shows the certificate user

Certificate issued by: shows the certificate issuer

Certificate expiration date: indicates when the certificate gets invalid

You can import a new WLAN certificate in Import WLAN Certificate by following these steps in order:

1. Input the corresponding password (or key) in the Certificate private password field. Then click Submit

to set the password.

2. You can see the password displayed in the Certificate private password field. Then click on the Browse

button in Select certificate/key file and select the certificate file.

3. Click Upload Certificate File to import the certificate file. If it succeeds, you can see the information

uploaded in Current Certificate. If it fails, you may need to return to step 1 to set the password correctly

and then import the certificate file again.

will remain after the AWK-

Advanced Settings

Several advanced functions are available to increase the functionality of your AWK-4121 and wireless network

system. A VLAN is a collection of clients and hosts grouped together as if they were connected to the broadcast

domains in a layer 2 network. The DHCP server helps you deploy wireless clients efficiently. Packet filters

provide security mechanisms, such as firewalls, in different network layers. Moreover, the AWK-4121 can

support STP/RSTP protocol to increase reliability across the entire network, and SNMP support can make

network management easier.

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Using Virtual LAN

Setting up Virtual LANs (VLANs) on your AWK series increases the efficiency of your network by dividing the

LAN into logical segments, as opposed to physical segments. In general, VLANs are easier to manage.

The Virtual LAN (VLAN) Concept

What is a VLAN?

A virtual LAN, commonly known as a VLAN, is a group of hosts with a common set of requirements that

communicate as if they were attached to the same broadcast domain, regardless of their physical location. A

VLAN has the same attributes as a physical LAN, but it allows for end stations to be grouped together even if

they are not located on the same network switch. Network reconfiguration can be done through software

instead of physically relocating devices.

VLANs now extend as far as the reach of the access point signal. Clients can be segmented into wireless

sub-networks via SSID and VLAN assignment. A Client can access the network by connecting to an AP

configured to support its assigned SSID/VLAN.

Benefits of VLANs

VLANs are used to conveniently, efficiently, and easily manage your network in the following ways:

• Manage adds, moves, and changes from a single point of contact

• Define and monitor groups

• Reduce broadcast and multicast traffic to unnecessary destinations

• Improve network performance and reduce latency

• Increase security

• Secure network restricts members to resources on their own VLAN

• Clients roam without compromising security

VLAN Workgroups and Traffic Management

The AP assigns clients to a VLAN based on a Network Name (SSID). The AP can support up to 9 SSIDs per radio

interface, with a unique VLAN configurable per SSID.

The AP matches packets transmitted or received to a network name with the associated VLAN. Traffic received

by a VLAN is only sent on the wireless interface associated with that same VLAN. This eliminates unnecessary

traffic on the wireless LAN, conserving bandwidth and maximizing throughput.

In addition to enhancing wireless traffic management, the VLAN-capable AP supports easy assignment of

wireless users to workgroups. In a typical scenario, each user VLAN represents a department workgroup; for

example, one VLAN could be used for a marketing department and the other for a human resource department.

In this scenario, the AP would assign every packet it accepted to a VLAN. Each packet would then be identified

as marketing or human resource, depending on which wireless client received it. The AP would insert VLAN

headers or “tags” with identifiers into the packets transmitted on the wired backbone to a network switch.

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Finally, the switch would be configured to route

packets from the marke

appropriate corporate resources such as printers

and servers. Packets from the human resource

department could be restricted to a gateway that

allowed access to only the Internet. A member of

the human resource department could send

receive e-mail and access the Internet, but would

be prevented from accessing servers or hosts on

the local corporate network.

SSID. This field will refer

VLAN ID for devices that connect to the port. The

ting department to the

and

Configuring Virtual LAN

VLAN Settings

To configure the AWK’s VLAN, use the VLAN Setting page to configure the ports.

Management VLAN ID

Setting Description Factory Default

VLAN ID

ranges from

1 to 4094

Port

Type Description Trunk Port

LAN This port is the LAN port on the AWK. Yes

WLAN This is a wireless port for the specific

WDS This is the WDS port on the AWK Yes

Port PVID

Setting Description Factory Default

VLAN ID ranging from 1

to 4094

Set the management VLAN of this AWK. 1

to the SSID that you have created. If more SSIDs have been

created, new rows will be added.

Set the port’s

port can be a LAN port or WLAN ports.

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list

NOTE

The VLAN feature can allow wireless clients to manage the AP. If the VLAN Management ID matches a VLAN ID,

then those wireless clients who are members of that VLAN will have AP management access.

CAUTION: Once a VLAN Management ID is configured and is equivalent to one of the VLAN IDs on the AP, all

members of that User VLAN will have management access to the AP. Be careful to restrict VLAN membership

to those with legitimate access to the AP.

VLAN Tagged

Setting Description Factory Default

A comma-separated

of VLAN IDs. Each of

the VLAN IDs range

from 1 to 4094.

Specify which VLANs can communicate with this specific VLAN. (Empty)

DHCP Server (for AP mode only)

DHCP (Dynamic Host Configuration Protocol) is a networking protocol that allows administrators to assign

temporary IP addresses to network computers by “leasing” an IP address to a user for a limited amount of time,

instead of assigning permanent IP addresses.

The AWK-4121 can act as a simplified DHCP server and easily assign IP addresses to your DHCP clients by

responding to the DHCP requests from the client ends. The IP-related parameters you set on this page will also

be sent to the client.

You can also assign a static IP address to a specific client by entering its MAC address. The AWK-4121 provides

a Static DHCP mapping list with up to 16 entities. Be reminded to check the Active check box for each entity

to activate the setting.

You can check the IP assignment status under Status  DHCP Client List.

DHCP server

Setting Description Factory Default

Enable Enables AWK-4121 as a DHCP server Disable

Disable Disable DHCP server function

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The IP address of the DNS Server used by your network. After

as well.

Default gateway

Setting Description Factory Default

IP address of a default

gateway

Subnet mask

Setting Description Factory Default

subnet mask Identifies the type of sub-network (e.g., 255.255.0.0 for a

Primary/ Secondary DNS server

Setting Description Factory Default

IP address of Primary/

Secondary DNS server

Start IP address

Setting Description Factory Default

IP address Indicates the IP address which AWK-4121 can start assigning None

The IP address of the router that connects to an outside

network

Class B network, or 255.255.255.0 for a Class C network)

entering the DNS Server’s IP address, you can use URL

The Secondary DNS server will be used if the Primary DNS

server fails to connect.

None

Maximum number of users

Setting Description Factory Default

1 – 999 Specifies how many IP address can be assigned continuously None

Client lease time

Setting Description Factory Default

1 – 10 days The lease time for which an IP address is assigned. The IP

Packet Filters

The AWK-4121 includes various filters for IP-based packets going through LAN and WLAN interfaces. You can

set these filters as a firewall to help enhance network security.

MAC Filter

The AWK-4121’s MAC filter is a policy-based filter that can allow or filter out IP-based packets with specified

MAC addresses. The AWK-4121 provides 8 entities for setting MAC addresses in your filtering policy.

Remember to check the Active check box for each entity to activate the setting.

10 (days)

address may go expired after the lease time is reached.

Enable

Setting Description Factory Default

Enable Enables MAC filter Disable

Disable Disables MAC filter

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ATTENTION

Be careful when you enable the filter function:

Drop + “

Accept + “

ATTENTION

Be careful when you enable the filter function:

Drop + “no entity on list is

Accept + “no entity on list is activated” = all packets are denied.

Policy

Setting Description Factory Default

Accept Only the packets fitting the entities on list can be allowed. Drop

Drop Any packet fitting the entities on list will be denied.

no entity on list is activated” = all packets are allowed

no entity on list is activated” = all packets are denied

IP Protocol Filter

The AWK-4121’s IP protocol filter is a policy-based filter that can allow or filter out IP-based packets with

specified IP protocol and source/destination IP addresses.

The AWK-4121 provides 8 entities for setting IP protocol and source/destination IP addresses in your filtering

policy. Four IP protocols are available: All, ICMP, TCP, and UDP. You must specify either the Source IP or the

Destination IP. By combining IP addresses and netmasks, you can specify a single IP address or a range of IP

addresses to accept or drop. For example, “IP address 192.168.1.1 and netmask 255.255.255.255” refers to

the sole IP address 192.168.1.1. “IP address 192.168.1.1 and netmask 255.255.255.0” refers to the range of

IP addresses from 192.168.1.1 to 192.168.255. Remember to check the Active check box for each entity to

activate the setting.

Enable

Setting Description Factory Default

Enable Enables IP protocol filter Disable

Disable Disables IP protocol filter

Policy

Setting Description Factory Default

Accept Only the packets fitting the entities on the list can be allowed Drop

Drop Any packet fitting the entities on the list will be denied

activated” = all packets are allowed.

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ATTENTION

Be careful when you enable the filter function:

Drop + “

Accept + “

TCP/UDP Port Filter

The AWK-4121’s TCP/UDP port filter is a policy-based filter that can allow or filter out TCP/UDP-based packets

with a specified source or destination port.

The AWK-4121 provides 8 entities for setting the range of source/destination ports of a specific protocol. In

addition to selecting TCP or UDP protocol, you can set either the source port, destination port, or both. The end

port can be left empty if only a single port is specified. Of course, the end port cannot be larger than the start

port.

The Application name is a text string that describes the corresponding entity with up to 31 characters.

Remember to check the Active check box for each entity to activate the setting.

Enable

Setting Description Factory Default

Enable Enables TCP/UDP port filter Disable

Disable Disables TCP/UDP port filter

Policy

Setting Description Factory Default

Accept Only the packets fitting the entities on list can be allowed. Drop

Drop Any packet fitting the entities on list will be denied.

no entity on list is activated” = all packets are allowed

no entity on list is activated” = all packets are denied

RSTP Settings (for WDS, Master, or Slave mode only)

AWK-4121 supports IEEE802.1D Spanning Tree Protocol and IEEE802.1w Rapid STP standards. In addition to

eliminating unexpected path looping, STP/RSTP can provide a backup path recovery if a wired/ wireless path

fails accidentally. The reliability and availability can increase because this fail-over function.

AWK-4121’s STP/RSTP feature is disabled by default. To be completely effective, you must enable RSTP/STP on

every AWK-4121 connected to your network. If AWK-4121 plays a Client role, which is connected to a device

(PLC, RTU, etc.) as opposed to network switch equipment, it is not necessary to enable STP/RSTP. The reason

is that it will cause unnecessary negotiation. AWK-4121s support STP/RSTP in AP mode (including WDS) only.

The following figures indicate which Spanning Tree Protocol parameters can be configured. A more detailed

explanation of each parameter is given below the figure.

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The root of the Spanning Tree topology periodically sends out a

“hello” message to other devices on the network to check if the

The amount of time this device waits before checking to see if it

message from the root longer than Max. age, it will reconfigure

Input a higher cost to indicate that this port is less suitable as a

RSTP status

This field will appear only when selected to operate STP/RSTP. It indicates whether this AWK-4121 is the Root

of the Spanning Tree (the root is determined automatically) or not.

Bridge priority

Setting Description Factory Default

Numerical value

selected

by user

Hello time

Setting Description Factory Default

Numerical value input

by user

(1 – 10 seconds)

You can increase the bridge priority by selecting a lower

number. A higher bridge priority brings a greater chance of

being established as the root of the Spanning Tree topology.

topology is healthy. Hello time indicates how often the root

sends hello messages.

32768

2 (seconds)

Forwarding delay

Setting Description Factory Default

Numerical value input

by user

(4 – 30 seconds)

Max. age

Setting Description Factory Default

Numerical value input

by user

(6 – 40 seconds)

The AWK-4121 comes with 10 “ports” for RSTP settings. Numbers 3-10 (WDS1-WDS8) are available only when

WDS is enabled in AP mode.

Enable RSTP

Setting Description Factory Default

Enable/ disable Enables or disables the port as a node on the Spanning Tree

Port priority

Setting Description Factory Default

Numerical value

selected by user

should change to a different topology.

As a non-root role, if the device has not received a hello

itself as a root. Once two or more devices on the network are

recognized as a root, the devices will renegotiate to set up a

new Spanning Tree topology.

topology.

Increase this port’s priority as a node on the Spanning Tree

topology by inputting a lower number.

15 (seconds)

20 (seconds)

Disable (unchecked)

128

Port cost

Setting Description Factory Default

Enable/ Disable

node for the Spanning Tree topology

2000000

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NOTE

We recommend you set an edge port for the port, which is connected to a non

network or an end

device (PLC, RTU, etc.) as opposed to network equipment. This can prevent unnecessary waiting and

negotiation of STP/RSTP protocol, and accelerate system initialization. When an edge port receives BPDUs, it

can still function as an STP/RSTP port and start negotiation.

Setting an edge port is different from disabling STP/RSTP on a port. If you disable STP/RSTP, a port will not deal

with STP/RSTP BPDUs

MD5

Edge port

Setting Description Factory Default

Checked/ unchecked Sets a port, which no BPDU expectedly goes through, as an

edge port

unchecked, except

AP port

Port Status

Port Status indicates the current Spanning Tree status of this port. Use Forwarding for normal transmission,

or Blocking to block transmission.

SNMP Agent

The AWK-4121 supports SNMP V1/V2c/V3. SNMP V1 and SNMP V2c use a community string match for

authentication, which means that SNMP servers access all objects with read-only or read/write permissions

using the community string public/private (default value). SNMP V3, which requires you to select an

authentication level of MD5 or SHA, is the most secure protocol. You can also enable data encryption to

enhance data security.

The AWK-4121’s MIB, which can be downloaded from the Moxa website, supports reading the attributes via

SNMP. Currently only the HTTP get method is supported.

This model also supports MXview network management software. In the AWK settings, please make sure that

the SNMP settings match MXview's SNMP configuration settings.

-STP/RSTP sub-

at all.

SNMP security modes and security levels supported by the AWK-4121 are shown in the following table. Select

the security mode and level that will be used to communicate between the SNMP agent and manager.

Protocol

Version

SNMP

V1, V2c

SNMP V3 No-Auth No No Use account with admin or user to access

Setting on

UI web page

V1, V2c

Read

Community

V1, V2c

Write/Read

Community

MD5 or SHA Authentication

Authentication

Type

Community

string

Community

string

based on MD5 or

SHA

based on MD5 or

SHA

Data

Encryption

No Use a community string match for

No Provides authentication based on

Data

encryption

key

Method

authentication

objects

HMAC-MD5, or HMAC-SHA algorithms.

8-character passwords are the minimum

requirement for authentication.

Provides authentication based on HMAC-

or HMAC-SHA algorithms, and data

encryption key. 8-character passwords and a

data encryption key are the minimum

requirements for authentication and

encryption.

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characters for authentication. This means that the SNMP agent

can accesses all objects with read/write permissions using this

The following parameters can be configured on the SNMP Agent page. A more detailed explanation of each

parameter is given below the following figure.

Enable

Setting Description Factory Default

Enable Enables SNMP Agent Disable

Disable Disables SNMP Agent

Remote Management

Setting Description Factory Default

Enable Allow remote management via SNMP agent Disable

Disable Disallow remote management via SNMP agent

Read community (for V1, V2c)

Setting Description Factory Default

V1, V2c Read

Community

Write community (for V1, V2c)

Setting Description Factory Default

V1, V2c Read /Write

Community

SNMP agent version

Setting Description Factory Default

V1, V2c, V3, or

V1, V2c, or

V3 only

Use a community string match with a maximum of 31

can access all objects with read-only permissions using this

community string.

Use a community string match with a maximum of 31

community string.

Select the SNMP protocol version used to manage the switch. V1, V2c

public

private

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Admin auth type (for V1, V2c, V3, and V3 only)

Setting Description Factory Default

No Auth Use admin account to access objects. No authentication No Auth

MD5 Provide authentication based on the HMAC-MD5 algorithms.

8-character passwords are the minimum requirement for

authentication.

SHA Provides authentication based on

HMAC-SHA algorithms. 8-character passwords are the

minimum requirement for authentication.

Admin private key (for V1, V2c, V3, and V3 only)

Setting Description Factory Default

Disable No data encryption Disable

DES DES-based data encryption

AES AES-based data encryption

Private key

A data encryption key is the minimum requirement for data encryption (maximum of 63 characters)

Private MIB Information Device Object ID

Also known as OID, this is AWK-4121’s enterprise value, which is a fixed value.

Link Fault Pass-Through (for Client/Slave mode only)

This function means if Ethernet port is link down, wireless connection will be forced to disconnect. Once

Ethernet link is recovered, AWK will try to connect to AP.

If wireless is disconnected, AWK restarts auto-negotiation on Ethernet port but always stays in the link failure

state. Once the wireless connection is recovered, AWK will try to recover the Ethernet link.

System log will indicate the link fault pass through events in addition to the original link up/down events.

Link Fault Pass-Through

Setting Description Factory Default

Enable Enables Link Fault Pass-Through Disable

Disable Disable Link Fault Pass-Through

Auto Warning Settings

Since industrial-grade devices are often located at the endpoints of a system, these devices will not always

know what is happening elsewhere on the network. This means that these devices, including wireless APs or

clients, must provide system maintainers with real-time alarm messages. Even when system administrators

are out of the control room for an extended period, they can still be informed of the status of devices almost

instantaneously when exceptions occur.

In addition to logging these events, the AWK-4121 supports different approaches to warn engineers

automatically, such as SNMP trap, e-mail, and relay output. It also supports two digital inputs to integrate

sensors into your system to automate alarms by email and relay output.

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

4121 is rebooted, such as when its settings are changed

System Log

System Log Event Types

Detail information for grouped events is shown in the following table. You can check the box for Enable log to

enable the grouped events. All default values are enabled (checked). The log for system events can be seen in

Status

System-related events Event is triggered when…

System restart (warm start) The AWK-

Network-related events Event is triggered when…

LAN link on The LAN port is connected to a device or network.

LAN link off The port is disconnected (e.g., the cable is pulled out, or the

Client joined/ left

(for AP/Master mode)

WLAN connected to AP

(for Client/Slave mode)

WLAN disconnected

(for Client/Slave mode)

Config-related events Event is triggered when…

Configuration Changed A configuration item has been changed.

Configuration file import via Web Console The configuration file is imported to the AWK-4121.

Console authentication failure An incorrect password is entered.

Firmware upgraded The AWK-4121’s firmware is updated.

Power events Event is triggered when…

Power 1/2 transition (On  Off) The AWK-4121 is powered down in PWR1/2.

PoE transition (On  Off) The AWK-4121 is powered down in PoE (discontinued starting with

Power 1/2 transition (Off  On) The AWK-4121 is powered via PWR1/2.

PoE transition (Off  On) The AWK-4121 is powered via PoE (discontinued starting with

DI events Event is triggered when…

DI1/2 transition (On  Off) Digital Input 1/2 is triggered by on to off transition

DI1/2 transition (Off  On) Digital Input 1/2 is triggered by off to on transition

System Log.

(IP address, subnet mask, etc.).

opposing device shuts down).

A wireless client is associated or disassociated.

The AWK-4121 is associated with an AP.

The AWK-4121 is disassociated from an AP.

HW Rev 2.0.0).

Rev 2.0.0).

Syslog

This function provides the event logs for the Syslog server. The function supports up to three configurable

Syslog servers and Syslog server UDP port numbers. When an event occurs, the event will be sent as a Syslog

UDP packet to the specified Syslog servers.

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Syslog Event Types

Detail information for the grouped events is shown in the following table. You can check the box for Enable log

to enable the grouped events. All default values are enabled (checked). Details for each event group can be

found on the “System log Event Types” table on page 3-31.

Syslog Server Settings

You can configure the parameters for your Syslog servers in this page.

Syslog server 1/ 2/ 3

Setting Description Factory Default

IP address Enter the IP address of the 1st/ 2nd/ 3rd Syslog Server None

Syslog port

Setting Description Factory Default

Port destination

(1 to 65535)

Enter the UDP port of the corresponding Syslog server 514

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E-mail

E-mail Event Types

Check the box for Active to enable the event items. All default values are deactivated (unchecked). Details for

each event item can be found on the “System log Event Types” table on page 3-31.

E-mail Server Settings

You can set up to 4 e-mail addresses to receive alarm emails from the AWK-4121. The following parameters

can be configured on the E-mail Server Settings page. Besides, a Send Test Mail button can be used to test

whether the Mail server and e-mail addresses are working. More detailed explanations for these parameters

are provided after the following figure.

Mail server (SMTP)

Setting Description Factory Default

IP address The IP address of your email server. None

User name & Password

Setting Description Factory Default

User name and password used in the SMTP server None

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mail address which will be shown in

From e-mail address

Setting Description Factory Default

Max. 63 characters Enter the administrator’s e-

the “From” field of a warning e-mail.

To E-mail address 1/ 2/ 3/ 4

Setting Description Factory Default

Max. 63 characters Enter the receivers’ e-mail addresses. None

None

Relay

The AWK-4121 has one relay output, which consists of 2 terminal block contacts on the AWK-4121’s top panel.

These relay contacts are used to indicate user-configured events and system failure.

The two wires attached to the relay contacts form an open circuit when a user-configured event is triggered. If

a user-configured event does not occur, the relay circuit will remain closed. For safety reasons, the relay circuit

is kept open when the AWK-4121 is not powered.

Relay Event Types

Trap

You can check the box for Active to enable the event items. All default values are deactivated (unchecked).

Details for each event item can be found in the “System log Event Types” table on page 3-31.

Traps can be used to signal abnormal conditions (notifications) to a management station. This trap-driven

notification can make your network more efficient.

Because a management station usually takes care of a large number of devices that have a large number of

objects, it will be overloading for the management station to poll or send requests to query every object on

every device. It would be better if the managed device agent could notify the management station by sending

a message known as a trap for the event.

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Trap Event Types

SNMP Trap Receiver Settings

SNMP traps are defined in SMIv1 MIBs (SNMPv1) and SMIv2 MIBs (SNMPv2c). The two styles are basically

equivalent, and it is possible to convert between the two. You can set the parameters for SNMP trap receivers

through the web page.

1st / 2nd Trap version

Setting Description Factory Default

V1 SNMP trap defined in SNMPv1 V1

V2 SNMP trap defined in SNMPv2

1st / 2nd Trap server IP/name

Setting Description Factory Default

IP address or host

name

Enter the IP address or name of the trap server used by your

network.

None

1st / 2nd Trap community

Setting Description Factory Default

Max. 31 characters Use a community string match with a maximum of 31

characters for authentication.

Alert

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Status

Wireless Status

The status of the wireless connection that consists of the 802.11 Info such as Operation mode and Channel,

Transmission Information, and information on Outgoing Packets and Incoming Packets are shown on

the Wireless Status page. The status will refresh every 5 seconds if the Auto refresh box is checked.

Certain values for 802.11 info may not show up due to different operation modes. As a result, Current BSSID

and Signal strength are not available in AP mode.

It is helpful to use the continuously updated information on this page, such as Signal strength, to monitor the

signal strength of the AWK-4121 in Client mode.

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Associated Client List (for AP/master mode only)

This page shows all the clients that are currently associated with a specific AWK-4121. The following

information which is useful for easy network diagnosis is also available:

MAC Address Displays the associated client MAC address.

If DHCP server is enabled on this AP/Master, the IP address of the client will

also be displayed.

Connection Duration States how long the client has been connecting to this AP/Master.

SNR States the Signal-Noise Ratio of the associated client.

This is especially useful for identifying a weak signal client that is potentially

reducing the overall wireless performance.

Tx (Bytes/Pkts): Records the AP-to-client traffic after a client is associated with the AP.

Rx (Bytes/Pkts): Records the client-to-AP traffic after a client is associated with the AP.

DHCP Client List (for AP mode only)

The DHCP Client List shows all the clients that require and have successfully received IP assignments. You can

click the Refresh button to refresh the list.

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You can press Select all button to select all content in the list for further editing.

System Log

Triggered events are recorded in System Log. You can export the log contents to an available viewer by clicking

Export Log. You can use the Clear Log button to clear the log contents and the Refresh button to refresh the

log.

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Relay Status

The status of user-configurable events can be found under Relay Status. The status will refresh every 5

seconds if the Auto refresh box is checked.

If an event is triggered, it will be noted on this list. System administrators can click Acknowledge Event when

he has acknowledged the event and addressed it.

DI and Power Status

The status of power inputs and digital inputs is shown on this web page. The status will refresh every 5 seconds

if the Auto refresh box is checked.

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NOTE

A CPU overload can result in a watchdog

firewall rules (IP/MAC/Protocol filters) and traffic PPS (packet per second) contribute to the rise in CPU usage.

NOTE

The AWK

System Status

The system status section indicates the status of the device memory and CPU usage in the current device.

-4121 supports up to 1080 packets per second.

Network Status

The network status section indicates the network status of the device with respect to ARP, bridge status, LLDP,

RSTP, and the routing table.

-triggered reboot of the system. Factors such as a high number of

ARP Table

Address Resolution Protocol (ARP) Table indicates the current IP to MAC address mapping for the device.

Bridge Status

Indicates the current status of the network bridge on the device. The interfaces and the corresponding MAC

addresses in this section are the entry points for ingress traffic.

LLDP Status

Displays information on neighboring devices collected via LLDP (Link Layer Discovery Protocol).

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Routing Table

Displays the routing information for the current device.

RSTP Status

Displays the Spanning Tree Protocol parameters configured.

Maintenance

Maintenance functions provide the administrator with tools to manage the AWK-4121 and wired/wireless

networks.

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Console Settings

You can enable or disable access permission for the following consoles: HTTP, HTTPS, Telnet, and SSH

connections. For more security, we recommend you only allow access to the two secured consoles, HTTPS and

SSH.

Ping

Ping helps to diagnose the integrity of wired or wireless networks. By inputting a node’s IP address in the

Destination field, you can use the ping command to make sure it exists and whether or not the access path

is available.

If the node and access path are available, you will see that all packets were successfully transmitted with no

loss. Otherwise, some, or even all, packets may get lost, as shown in the following figure.

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ATTENTION

Please make sure the power source is stable when you upgrade your firmware. An unexpected power breakup

may damage your AWK

Firmware Upgrade

The AWK-4121 can be enhanced with more value-added functions by installing firmware upgrades. The latest

firmware is available at Moxa’s download center.

Before running a firmware upgrade, make sure the AWK-4121 is off-line. Click the Browse button to specify

the firmware image file and click Firmware Upgrade and Restart to start the firmware upgrade. After the

progress bar reaches 100%, the AWK-4121 will reboot itself.

When upgrading your firmware, the AWK-4121’s other functions are forbidden.

-4121.

Config Import Export

You can back up or restore the AWK-4121’s configuration with Config Import Export.

In the Config Import section, click Browse to specify the configuration file and click Config Import button

to begin importing the configuration.

In the Config Export section, click the Config Export button and save the configuration file onto your local

storage media. The configuration file is a text file and you can view and edit it with a general text-editing tool.

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You can also back up or restore the ABC-01 (HW Rev. 1.1 support only) configuration using Config Export and

Config Import.

To download the configuration to the AWK:

1. Turn off the AWK.

2. Plug in the ABC-01 to the AWK’s RS-232 console.

3. Turn on AWK.

4. AWK will detect ABC-01 during the boot up process, and will download the configuration from the ABC-01

to the AWK automatically. Once the configuration downloads and if configuration format is correct, the AWK

will emit three short beeps, and then continues with the boot up process.

5. Once the AWK has booted up successfully, it will emit the normal two beeps, and the ready LED will turn to

solid green.

Load Factory Default

Use this function to reset the AWK-4121 and roll all settings back to the factory default values. You can also

reset the hardware by pressing the reset button on the top panel of the AWK-4121.

Password

You can change the administration password for each of the AWK-4121’s console managers by using the

Password function. Before you set up a new password, you must input the current password and reenter the

new password for confirmation. For your security, do not use the default password root, and remember to

change the administration password regularly.

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Misc. Settings

This section provides additional settings that can be used to manage your AWK-4121 more conveniently.

Reset button

Setting Description Factory Default

Always enable The AWK-4121’s Reset button works normally. Always enable

Disable after 60 sec The AWK-4121’s reset to default function will become invalid

60 seconds after the AWK-4121 finishes booting up.

Save Configuration

The following figure shows how the AWK-4121 stores the setting changes into volatile and non-volatile memory.

All data stored in volatile memory will disappear when the AWK-4121 is shutdown or rebooted unless they are

y. Because the AWK-4121 starts up and initializes with the settings stored in flash memory, all new changes

must be saved to flash memory before restarting the AWK-4121.

This also means the new changes will not work unless you run either the Save Configuration function or the

Restart function.

After you click on Save Configuration in the left menu box, the following screen will appear. Click Save if you

wish to update the configuration settings in the flash memory at this time. Alternatively, you may choose to run

other functions and put off saving the configuration until later. However, the new setting changes will remain

in the non-volatile memory until you save the configurations.

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Restart

You must restart the device for any changes in the configuration setting to take effect. If you have submitted

configuration changes, you will find a blinking string in the upper right corner of the configuration screen. After

making all your changes, click the Restart function in the left menu box.

If you made changes recently but did not save, you will be given two options. Clicking the Restart button here

will reboot the AWK-4121 directly, and all setting changes will be ignored. Clicking the Save and Restart

button will apply all setting changes and then reboot the AWK-4121.

If you run the Restart function without changing any configurations or with all changes already saved, you will

see just one Restart button on your screen.

You will not be able to run any of the AWK-4121’s functions while the system is rebooting.

Logout

Logout helps users disconnect the current HTTP or HTTPS session and go to the Login page. For security

reasons, we recommend you logout before quitting the console manager.

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4. Software Installation/Configuration

The following topics are covered in this chapter:

Overview

Wireless Search Utility

 Installing Wireless Search Utility

 Configuring the Wireless Search Utility

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Overview

The Wireless Search Utility can be downloaded from the Moxa website at www.moxa.com.

Wireless Search Utility

Installing Wireless Search Utility

Once the Wireless Search Utility is downloaded, run the setup executable to start the installation.

1. Click Next on the welcome screen that opens to proceed with the installation.

2. Click Next to install program files to the default directory, or click Browse to select an alternate location.

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3. Click Next to create the program’s shortcut files in the default directory, or click Browse to select an

alternate location.

4. Click Next to select additional tasks.

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5. Click Next to proceed with the installation. The installer then displays a summary of the installation options.

6. Click Install to begin the installation. The setup window will report the progress of the installation. To

change the installation settings, click Back and navigate to the previous screen.

7. Click Finish to complete the installation of the Wireless Search Utility.

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Configuring the Wireless Search Utility

The Broadcast Search function is used to locate all AWK-4121 APs that are connected to the same LAN as your

computer. After locating an AWK-4121, you will be able to change its IP address. Since the Broadcast Search

function searches by TCP packet and not IP address, it doesn’t matter if the AWK-4121 is configured as an AP

or client. In either case, APs and clients connected to the LAN will be located, regardless of whether or not they

are part of the same subnet as the host.

1. Start the Wireless Search Utility program. When the Login page is displayed, select the Device Search

Only option to search for AWKs and to view each AWK’s configuration. Select the Device Management

option to assign IPs, upgrade firmware, and locate devices.

2. Open the Wireless Search Utility and then click the Search icon.

The “Searching” window indicates the progress of the search.

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3. When the search is complete, all AWKs that were located will be displayed in the Wireless Search Utility

window.

4. Click Locate to cause the selected device to beep.

Make sure your AWK is unlocked before using the search utility function buttons (Locate, Assign IP, etc.). The

AWK will unlock automatically if the password is set to the default. Otherwise, you must enter the new

password manually.

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ATTENTION

For security purposes, we suggest you can change the

tility login password instead of using

default.

Go to Tools  Login Options to manage and unlock additional AWKs.

Use the scroll down list to select the MAC addresses of those AWKs you would like to manage, and then click

Add. Key in the password for the AWK device and then click OK to save. If you return to the search page and

search for the AWK again, you will find that the AWK will unlock automatically.

Wireless Search U

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To modify the configuration of the highlighted AWK, click on the Web icon to open the web console. Refer to

Chapter 3, “Using the Web Console,” for information on using the web console.

Click on Telnet if you would like to use telnet to configure your AWKs.

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Click Assign IP to change the IP setting.

Search

The three advanced options—Search, Connection, and Miscellaneous—are explained below:

Retry count (default=5): Indicates the number of times the search will be automatically retried.

Retry interval (ms): Specifies the interval between retries.

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Connection

Connection timeout (secs): Sets the waiting time for the Default Login, Locate, Assign IP, Upload

Firmware, and Unlock actions to complete.

Upgrade timeout (secs): Sets the waiting time for a firmware upgrade before a connection is disconnected,

which is the waiting time for the firmware to be written to flash.

Misc.

Search on start: Checkmark this option if you would like the search function to start searching for devices

after you log in to the Wireless Search Utility.

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

5. Other Console Configurations

This chapter explains how to access the AWK-4121 for the first time. In addition to HTTP access, there are four

ways to access AWK-4121: serial console, Telnet console, SSH console, and HTTPS console. The serial console

connection method, which requires using a short serial cable to connect the AWK-4121 to a PC’s COM port, can

be used if you do not know the AWK-4121’s IP address. The other consoles can be used to access the

AWK-4121 over an Ethernet LAN, or over the Internet.

The following topics are covered in this chapter:

RS-232 Console Configuration (115200, None, 8, 1, VT100)

Configuration by Telnet and SSH Consoles

Configuration by Web Browser with HTTPS/SSL

Disabling Telnet and Browser Access

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ATTENTION

simultaneously.

However, we strongly suggest that you

Following this advice will allow you to maintain better control over the configuration of your AWK

ATTENTION

Do not use the RS

48VDC),

even though reverse voltage protection is supported. If you need to connect the RS

voltage, Moxa’s TCC

NOTE

We recommend using

Terminal Emulator, which can be downloaded free of charge from

Moxa’s website.

You CANNOT connect to the AWK-4121 using two or more of these console configurations

You can connect to the AWK-4121 simultaneously by web browser and serial/ Telnet /SSH console.

do NOT use more than one connection method at the same time.

-4121.

RS-232 Console Configuration (115200, None, 8, 1, VT100)

The serial console connection method, which requires using a short serial cable to connect the AWK-4121 to a

PC’s COM port, can be used if you do not know the AWK-4121’s IP address. It is also convenient to use serial

console configurations when you cannot access the AWK-4121 over Ethernet LAN, such as in the case of LAN

cable disconnections or broadcast storming over the LAN.

Before running PComm Terminal Emulator, use an RJ45 to DB9-F (or RJ45 to DB25-F) cable to connect the

AWK-4121’s RS-232 console port to your PC’s COM port (generally COM1 or COM2, depending on how your

system is set up). After installing PComm Terminal Emulator, take the following steps to access the RS-232

console utility.

1. From the Windows desktop, open the Start menu and start PComm Terminal Emulator in the PComm

(Lite) group.

2. Select Open under Port Manager to open a new connection.

-232 console manager when the AWK-4121 is powered at reversed voltage (ex. -

-232 console at reverse

-82 isolator is your best solution.

Moxa PComm (Lite)

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To modify the appearance of the PComm Terminal Emulator window, select Edit  Font and then choose the

desired formatting options.

ATTENTION

If you unplug the RS

logged out for network security. You

will need to log in again to resume operation.

3. The Communication Parameter page of the Property window opens. Select the appropriate COM port for

Console Connection, 115200 for Baud Rate, 8 for Data Bits, None for Parity, and 1 for Stop Bits.

4. Click on the Terminal tab, and select VT100 (or ANSI) for Terminal Type. Click on OK to continue.

5. The Console login screen will appear. Log into the RS-232 console with the login name (default: admin)

and password (default: root, if no new password is set).

6. The AWK-4121’s device information and Main Menu will be displayed. Please follow the description on

screen and select the administration option you wish to perform.

-232 cable or trigger DTR, you will automatically be

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NOTE

The AWK

and the default subnet mask is 255.255.255.0 (for a

Class C network). If you do not set these values properly, please check the network settings of your PC host and

then change the IP address to 192.168.127.xxx and subnet

Configuration by Telnet and SSH Consoles

You may use Telnet or SSH client to access the AWK-4121 and manage the console over a network. To access

the AWK-4121’s functions over the network from a PC host that is connected to the same LAN as the AWK-4121,

you need to make sure that the PC host and the AWK-4121 are on the same logical subnet. To do this, check

your PC host’s IP address and subnet mask.

Follow the steps below to access the console utility via Telnet or SSH client.

1. From Windows Desktop, run Start  Run, and then use Telnet to access the AWK-4121’s IP address from

-4121’s default IP address is 192.168.127.253

mask to 255.255.255.0.

the Windows Run window. (You may also issue the telnet command from the MS-DOS prompt.)

When using SSH client (ex. PuTTY), please run the client program (ex. putty.exe) and then input the

AWK-4121’s IP address, specifying 22 for the SSH connection port.

2. The Console login screen will appear. Please refer to the previous paragraph “RS-232 Console

Configuration” and for login and administration.

Configuration by Web Browser with HTTPS/SSL

To secure your HTTP access, the AWK-4121 supports HTTPS/SSL encryption for all HTTP traffic. Perform the

following steps to access the AWK-4121’s web browser interface via HTTPS/SSL.

1. Open your web browser and type https://<AWK-4121’s IP address> in the address field. Press Enter to

establish the connection.

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

2. Warning messages will pop out to warn users that the security certificate was issued by a company they

have not chosen to trust.

3. Select Yes to accept the certificate issued by Moxa IW and then enter the AWK-4121’s web browser

interface secured via HTTPS/SSL. (You can see the protocol in URL is https.) Then you can use the menu

tree on the left side of the window to open the function pages to access each of the AWK-4121’s functions.

Disabling Telnet and Browser Access

If you are connecting the AWK-4121 to a public network but do not intend to use its management functions

over the network, then we suggest disabling both Telnet Console and Web Configuration. Please run

Maintenance

Console Settings to disable them, as shown in the following figure.

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

6. References

This chapter provides more detailed information about wireless-related technologies. The information in this

chapter can help you administer your AWK-4121s and plan your industrial wireless network better.

The following topics are covered in this chapter:

Wireless Distribution System (WDS)

Beacon

DTIM

Fragment

RTS Threshold

STP and RSTP

 The STP/RSTP Concept

 Differences between RSTP and STP

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Wireless Distribution System (WDS)

Traditionally, APs are connected via Ethernet LAN ports. By using a Wireless Distribution System (WDS), APs

can communicate with one another wirelessly. For example, AP 2 acts as an access point for the notebook

computers or other IEEE802.11-enabled clients, and forwards packets sent from the notebook computers to AP

1 through WDS. Then, AP 1 forwards the packets to the Ethernet LAN. Packets destined for the notebook

computers follow a reverse path from the Ethernet LAN through the APs to the notebook computers. In this way,

AP 2 acts as an “AP repeater.”

By using WDS, two or more LAN segments can be connected wirelessly. As illustrated in the above figure, a pair

of wireless LAN-to-LAN bridges is used to connect two LAN segments. Since the AP is WDS-enabled, it can be

used as a wireless bridge.

It is a good idea to plan your wireless network by drawing a diagram so that you know how each AWK-4121 is

connected to other peer APs or wireless bridges by WDS, and how bridges are connected to other peer bridges

by WDS. See the following figure for an example of a network-planning diagram.

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ATTENTION

Be sure to eliminate loops from networks that consist of wireless bridges, Ethernet switches, Ethernet links,

and WDS links. If an

seriously degraded. The following figure shows a network topology containing a loop.

y loops exist, packets will circle around the loops and network performance will be

Beacon

A beacon is a packet broadcast by the AP to keep the network synchronized. A beacon includes the wireless LAN

DTIM

service area, the AP address, the Broadcast destination address, a time stamp, Delivery Traffic Indicator Maps

(DTIM), and the Traffic Indicator Message (TIM). Beacon Interval indicates the frequency interval of AP.

Delivery Traffic Indication Map (DTIM) is contained in beacon frames. It is used to indicate that broadcast and

multicast frames buffered by the AP will be delivered shortly. Lower settings result in more efficient networking,

while preventing your PC from dropping into power-saving sleep mode. Higher settings allow your PC to enter

sleep mode, thus saving power.

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Fragment

A lower setting means smaller packets, which will create more packets for each transmission. If you have

decreased this value and experience high packet error rates, you can increase it again, but it will likely decrease

overall network performance. Only minor modifications of this value are recommended.

RTS Threshold

RTS Threshold (256-2346) – This setting determines how large a packet can be before the Access Point

coordinates transmission and reception to ensure efficient communication. This value should remain at its

default setting of 2,346. When you encounter inconsistent data flow, only minor modifications are

recommended.

STP and RSTP

The STP/RSTP Concept

Spanning Tree Protocol (STP) was designed to help reduce link failures in a network, and provide protection

from loops. Networks that have a complicated architecture are prone to broadcast storms caused by

unintended loops in the network. The STP protocol is part of the IEEE802.1D standard, 1998 Edition bridge

specification.

Rapid Spanning Tree Protocol (RSTP) implements the Spanning Tree Algorithm and Protocol defined by

IEEE802.1w-2001 standard. RSTP provides the following benefits:

The topology of a bridged network will be determined much more quickly compared to STP.

RSTP is backward compatible with STP, making it relatively easy to deploy. For example:

Defaults to sending 802.1D-style BPDUs if packets with this format are received.

STP (802.1D) and RSTP (802.1w) can operate on the LAN ports and WLAN ports (AP and WDS1-WDS8) of the

same AWK-4121.

This feature is particularly helpful when the AWK-4121 connects to older equipment, such as legacy switches.

Differences between RSTP and STP

RSTP is similar to STP, but includes additional information in the BPDUs that allow each bridge to confirm that

it has taken action to prevent loops from forming when it decides to enable a link to a neighboring bridge.

Adjacent bridges connected via point-to-point links will be able to enable a link without waiting to ensure that

all other bridges in the network have had time to react to the change. The main benefit of RSTP is that the

configuration decision is made locally rather than network-wide, allowing RSTP to carry out automatic

configuration and restore a link faster than STP.

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

7. Supporting Information

This chapter presents additional information about this manual and product. You can also learn how to contact

Moxa for technical support.

The following topics are covered in this chapter:

About This User’s Manual

DoC (Declaration of Conformity)

 Federal Communication Commission Interference Statement

 R&TTE Compliance Statement

Firmware Recovery

Technical Support Contact Information

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NOTE

You can find out the hardware revision number of AWK

The firmware version number can be seen on the Overview page, as follow

About This User’s Manual

This manual is mainly designed for, but no limited to, the following hardware and firmware for the AWK-4121:

• Hardware Revision: 1.1

• Firmware Version: 1.13

You are strongly recommended to visit Moxa’s website (http://www.moxa.com) and find the latest product

datasheet, firmware, QIG (Quick Installation Guide), UM (User’s Manual) and related information.

-4121 on the side label.

DoC (Declaration of Conformity)

Federal Communication Commission Interference Statement

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part

15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in

a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not

installed and used in accordance with the instructions, may cause harmful interference to radio

communications. However, there is no guarantee that interference will not occur in a particular installation. If

this equipment does cause harmful interference to radio or television reception, which can be determined by

turning the equipment off and on, the user is encouraged to try to correct the interference by one of the

following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

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NOTE

The availability of some specific channels and / or operational frequency bands are country dependent and are

firmware programmed at the factory to match the intended destination. The firmware setting is not accessible

by the end user.

• Consult the dealer or an experienced radio/TV technician for help.

FCC Caution: To assure continued compliance, (example – use only shielded interface cables when connecting

to computer or peripheral devices). Any changes or modifications not expressly approved by the party

responsible for compliance could void the user’s authority to operate this equipment. This transmitter must not

be co-located or operated in conjunction with any other antenna or transmitter.

FCC Radiation Exposure Statement

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This

equipment should be installed and operated with a minimum distance of 20 cm between the radiator & your

body.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This

device may not cause harmful interference, and (2) this device must accept any interference received,

including interference that may cause undesired operation.

FCC 15.407(e): Within the 5.15-5.25 GHz band, U-NII devices are restricted to indoor operations to reduce any

potentially harmful interference to co-channel MSS operations.

R&TTE Compliance Statement

Moxa declares that the apparatus AWK-4121 complies with the essential requirements and other relevant

provisions of Directive 1999/5/EC.

This equipment complies with all the requirements of DIRECTIVE 1999/5/CE OF THE EUROPEAN PARLIAMENT

AND THE COUNCIL OF 9 March 1999 on radio equipment and telecommunication terminal equipment and the

mutual recognition of their conformity (R&TTE).

The R&TTE Directive repeals and replaces in the directive 98/13/EEC (Telecommunications Terminal

Equipment and Satellite Earth Station Equipment) as of April 8, 2000.

Safety

This equipment is designed with the utmost care for the safety of those who install and use it. However, special

attention must be paid to the dangers of electric shock and static electricity when working with electrical

equipment. All guidelines of this and of the computer manufacturer must therefore be allowed at all times to

ensure the safe use of the equipment.

EU Countries Intended for Use

The ETSI version of this device is intended for home and office use in Austria, Belgium, Denmark, Finland,

France (with Frequency channel restrictions), Germany, Greece, Ireland, Italy, Luxembourg, Portugal, Spain,

Sweden, The Netherlands, and United Kingdom.

The ETSI version of this device is also authorized for use in EFTA member states Norway and Switzerland.

EU Countries Not Intended for Use

None.

Potential Restrictive Use

France: only channels 10, 11, 12, and 13.

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Firmware Recovery

When the LEDs of FAULT, Signal Strength, CLIENT, BRIDGE and WLAN all light up simultaneously and

blink at one-second interval, it means the system booting has failed. It may result from some wrong operation

or uncontrollable issues, such as an unexpected shutdown during firmware update. The AWK-4121 is designed

to help administrators recover such damage and resume system operation rapidly. You can refer to the

following instructions to recover the firmware:

Connect to the AWK-4121’s ES-232 console with 115200bps and N-8-1. You will see the following message

shown on the terminal emulator every one second.

Press Ctrl - C and the following message will appear.

Enter 2 to change the network setting. Specify the path for the AWK-4121 firmware file on the TFTP server and

press y to write the settings into flash memory.

When AWK-4121 restarts, and the “Press Ctrl-C to enter Firmware Recovery Process…” message will reappear,

press Ctrl-C to enter the menu and select 1 to start the firmware upgrade process.

Select 0 in the sub-menu to load the firmware image via LAN, and then enter the file name of the firmware to

start the firmware recovery.

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Technical Support Contact Information

Customer satisfaction is our number one concern, and to ensure that customers receive the full benefit of our

products, Moxa Internet Services has been set up to provide technical support, driver updates, product

information, certification status, installation guide and user’s manual updates.

The following services are provided:

• E-mail for technical support:

support@moxa.com (Worldwide)

support@usa.moxa.com (The Americas)

• World Wide Web (WWW) Site for product information:

http://www.moxa.com