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Allied Telesis AT-WL2411 Installation Manual

Wireless access point
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Installation
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PN 613-50229-00 Rev A
Wireless
Access Point
AT-WL2411
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Summary of Contents for Allied Telesis AT-WL2411

  • Page 1 Wireless ® Access Point AT-WL2411 ‹ Installation Guide PN 613-50229-00 Rev A...
  • Page 2 Copyright  2001 Allied Telesyn International, Corp. 960 Stewart Drive Suite B, Sunnyvale, CA 94085 USA All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn International, Corp. All other product names, company names, logos or other designations mentioned herein are trademarks or registered trademarks of their respective owners.

  • Page 3: Table Of Contents

    Configuring the AT-WL2411 UAP ...................................14 Chapter 2 Installing the AT-WL2411 UAP ..................................18 Using the AT-WL2411 UAP in a Wireless Network ...........................18 Using a UAP in a Simple Wireless Network ............................18 Using Multiple UAPs and Roaming End Devices..........................19 Using UAPs to Bridge Between Wired LANs ............................20 Understanding Bridging and the UAP Ports ..............................21...
  • Page 4 Configuring the LAN ID (Domain)................................45 Setting Root Priority ....................................46 Configuring the AP Name..................................47 Configuring the AT-WL2411 UAP as a DHCP Server ........................47 Configuring the AT-WL2411 UAP as a NAT Server .......................... 51 Configuring Global Flooding................................... 51 Configuring Global RF Parameters ................................
  • Page 5 AT-WL2411 Wireless Access Point Installation Guide Commonly Asked Technical Support Questions ........................... 118 Getting Help with Your Installation ................................121 Chapter 7 Advanced Features ......................................122 Using the UAP Monitor ....................................122 Understanding UAP Segments................................122 Entering the UAP Monitor ..................................123 Using UAP Monitor Commands ...................................
  • Page 6 Table of Contents Advanced Filters Menu Defaults ................................150 IP Tunnels Menu Defaults ..................................151 Tunnel Filters Menu Defaults.................................151 Network Management Menu Defaults ..............................152 Password Menu Defaults ..................................152 IEEE 802.11b HR Radio Menu Defaults...............................153 Appendix B Understanding IP ......................................155 An Overview of IP ......................................155 Operation ..........................................158 Tunnel Origination ....................................158 Building the Spanning Tree ...................................158...

  • Page 7: Preface

    Preface This guide contains instructions on how to install, configure, and manage an AT-WL2411 Wireless Access Point. Purpose of This Guide This guide is intended for network administrators who are responsible for managing the wireless access point. Network administrators should be familiar with Ethernet and Fast Ethernet technology.

  • Page 8: Where To Find Related Guides

    Where to Find Related Guides The Allied Telesyn web site at www.alliedtelesyn.com contains the most recent documentation for all of our products. All web-based documentation for this product and other Allied Telesyn products can be downloaded from the web site in PDF format. Contacting Allied Telesyn You can contact Allied Telesyn technical support by telephone, fax and e-mail.

  • Page 9: Returning Products

    AT-WL2411 Wireless Access Point Installation Guide Returning Products Products for return or repair must first be assigned a Return Materials Authorization (RMA) number. A product sent to Allied Telesyn without a RMA number will be returned to the sender at the sender’s expense.

  • Page 10: Ftp Server

    FTP Server If you need a new version of management software for an Allied Telesyn managed device and you know the file name of the program, you can download the software by connecting directly to our FTP server at ftp.alliedtelesyn.com. To login, enter ‘anonymous’ for the user name and your e-mail address for the password.

  • Page 11: Chapter 1 Getting Started

    Chapter 1 Getting Started The chapter introduces and explains the AT-WL2411 wireless access point. Understanding the AT-WL2411 Universal Access Point The AT-WL2411 Universal Access Point (UAP) is a high-performance, wireless local area network (LAN) access points. The UAP is designed to be powerful and easy to use, and each can be configured as an access point or as a point-to-point bridge.

  • Page 12: The At-Wl2411 Uap

    The AT-WL2411 UAP The AT-WL2411 access point accommodates one 802.11b HR radio. The AT-WL2411 can only be configured as a standard access point. Note The AT-WL2411 with an 802.11b HR radio installed is Wi-Fi™ certified for interoperability with other 802.11b HR wireless LAN devices.

  • Page 13: Understanding The At-Wl2411 Ports

    Flashes when a frame is transmitted or received on the Ethernet port. Root/error Flashes if this device is configured as the root. May also remain on if an error is detected. Understanding The following illustration identifies the ports on the AT-WL2411. the AT-WL2411 Ports Power 10BaseT Serial...

  • Page 14: Configuring The At-Wl2411 Uap

    Configuring the AT-WL2411 UAP Although the AT-WL2411 UAP will work directly out of the box, you must assign it an IP address and define other basic parameters before you can manage it remotely. To perform these initial configurations, you must use a serial connection and a terminal or a communications program (such as HyperTerminal).
  • Page 15 AT-WL2411 Wireless Access Point Installation Guide 4. Press Enter when the message "Starting system" appears on your PC screen. The login screen appears. Figure 3 Login Screen...
  • Page 16 The name of the DHCP server that the AT- WL2411 is to access for automatic address assignment. If no server name is specified, the AT-WL2411 responds to offers from any server. To assign an IP address manually, configure these parameters in...
  • Page 17 AT-WL2411 Wireless Access Point Installation Guide 7. If you are configuring a AT-WL2411, you must configure Node Type in the Wireless Bridging menu in the 802.11b Radio menu. Configure Node Type as Master if this radio will communicate with end devices;...

  • Page 18: Installing The At-Wl2411 Uap

    In general, the AT-WL2411 UAP forwards data between end devices and the wired network. The AT-WL2411 accommodates one radio. Use the AT-WL2411 when you do not need mixed radios or the AT-WL2411 is configured as a station at the remote end of a wireless hop to a secondary LAN.

  • Page 19: Using Multiple Uaps And Roaming End Devices

    AT-WL2411 Wireless Access Point Installation Guide In a simple wireless network, a single UAP on the wired network serves as a transparent bridge between the wired network and end devices. The end devices communicate exclusively with devices on the wired network;...

  • Page 20: Using Uaps To Bridge Between Wired Lans

    With the UAP multichannel architecture, you can have more than one UAP within the same cell area to increase throughput. In addition, overlapping radio coverage cells offer redundancy for critical applications so that coverage is not lost if a single UAP or radio fails. Host Ethernet Using UAPs to...

  • Page 21: Understanding Bridging And The Uap Ports

    AT-WL2411 Wireless Access Point Installation Guide Understanding Bridging and the UAP Ports The UAPs consist of a group of multiport Ethernet-to-wireless bridges. The UAPs support IP for installations where wireless end devices roam across IP router subnets. Unlike the Ethernet and radio ports, the IP port does not have its own output connector.
  • Page 22 End devices operate similarly to Ethernet products; therefore, all of your existing Ethernet applications will work with the wireless network without any special networking software. Some of the significant functions supported at the bridging layer are explained in the Bridging Layer Functions Table.
  • Page 23 AT-WL2411 Wireless Access Point Installation Guide Function Explanation Switch Support Ethernet switches that do not comply with the 802.1D standard have difficulty handling end devices that roam between different switched segments. The UAP provides data link tunneling for switches that do not handle roaming.

  • Page 24: Configuring Ethernet Bridging

    Configuring Ethernet bridging determines how wireless frames are converted to Ethernet frames and vice versa. With Ethernet bridging enabled, frames Ethernet are forwarded directly to the Ethernet network. With Ethernet bridging Bridging disabled, data link tunneling occurs; that is, the UAP forwards frames on the Ethernet link encapsulated in data frames.
  • Page 25 AT-WL2411 Wireless Access Point Installation Guide You should enable bridging on a secondary LAN unless the inbound path is through an IP tunnel or through a bridge or switch that does not support roaming. Bridges and switches that adhere to the IEEE 802.1D standard support roaming.

  • Page 26: General Installation Guidelines

    General Installation Guidelines Allied Telesyn recommends that you have Allied Telesyn or other certified providers conduct a site survey to determine the ideal locations for all of your network components. A proper site survey requires special equipment and training. The following general practices should be followed in any installation: Locate UAPs centrally within areas requiring coverage.

  • Page 27: General Steps To Installing The At-Wl2411 Uap

    2. Connect the UAP to the Ethernet network (unless you are using it as a wireless UAP) and power source. Installing the You can install the AT-WL2411 horizontally on a desk or counter, or you can install it vertically to a wall using the wall bracket that ships with it. AT-WL2411 UAP Follow the instructions that ship with the bracket and UAP.
  • Page 28 Clip 4. Using the screws you provided, secure the bracket to the wall. 5. Fit the slots on the back of the AT-WL2411 over the hooks on the mounting bracket. 6. Slide the AT-WL2411 up slightly, and then press the base of the AT- WL2411 until it clicks into the clip at the bottom of the mounting bracket.
  • Page 29 AT-WL2411 Wireless Access Point Installation Guide Place the antenna at 180° when using the AT-WL2411 vertically; for instance, when the AT-WL2411 is mounted on a wall or cubicle. 90° 180° 0° Note Do not force the antenna past the hard stop at 0° or 180° or you may break the antenna connector.
  • Page 30 Unless you are using the UAP as a wireless UAP, you must connect the UAP to your Ethernet network using a 10BaseT Ethernet connector. To connect the AT-WL2411, do the following: 1. Attach one end of the 10BaseT cable to the 10BaseT port on the UAP,...
  • Page 31 2. Plug one end of the power cord into the power port on the UAP, and plug the other end into an AC power outlet. The AT-WL2411 has no On/Off switch, so it boots as soon as you apply power.

  • Page 32: Establishing A Web Browser Session

    Establishing a Web Browser Session After you have configured the IP address and other basic network parameters, you can access your UAP from a remote location. Note Although you can manage the device remotely using either a Telnet session or a Web browser, this manual assumes you are using a Web browser.
  • Page 33 AT-WL2411 Wireless Access Point Installation Guide Choose Open from the File menu. In the Open field, enter the IP address of the UAP and press Enter. The Universal Access Point Login screen appears. Figure 5 Universal Access Point Login Screen 4.
  • Page 34 5. Click Login. The TCP/IP Settings screen appears. Figure 6 TCP/IP Settings Screen Your Web browser session is established.

  • Page 35: Managing The At-Wl2411 Remotely

    Chapter 3 Managing the AT-WL2411 Remotely This chapter explains how to configure and manage the AT-WL2411 remotely using a Web browser. Configuring the AT-WL2411 Universal Access Point Parameters The UAP interface uses common menus to accomplish common tasks. The following sections explain those common tasks.
  • Page 36 2. Click Passwords. The Passwords screen appears. Figure 7 Passwords Screen 3. Type a user name in the User Name field and a password in the Password field. The User Name and Password can be 0 to 16 characters long. When you are finished, click Submit Changes to save your changes.
  • Page 37 AT-WL2411 Wireless Access Point Installation Guide This table explains the Password parameters. Parameter Description Read Only Gives read only access to the UAP. If you sign in with Password the read only password, you are able to view the configuration and execute diagnostics, but you...
  • Page 38 RADIUS Server You can also configure the access point to act as a RADIUS server for itself and other access points. You can enter up to 70 username/passwords into the UAP RADIUS server database. To configure the RADIUS server, do the following: 1.
  • Page 39 AT-WL2411 Wireless Access Point Installation Guide RADIUS Client Use the RADIUS client to administer passwords for all access points at a central location (a RADIUS server). When you enable the RADIUS client, the normal passwords for the access point are disabled. The username and password information that you enter is sent to the RADIUS server;...
  • Page 40 2. Click Passwords, and then click RADIUS Client. The RADIUS Client screen appears. Figure 9 RADIUS Client Screen 3. Set Configuration access to enabled. 4. Configure the Servers. There is a Primary Server (Server 1) and a Secondary Server (Server 2). The Primary server will always be sent the Authentication first.

  • Page 41: Setting The Hello Period

    AT-WL2411 Wireless Access Point Installation Guide Setting the You can set the following types of Hello periods: Hello Period Ethernet Hello Period, which describes how often Hellos are sent on the Ethernet. IP Tunnel Hello Period, which describes how often Hellos are sent through the tunnel.
  • Page 42 3. Click the Hello Period down arrow, and choose a hello period. When you are finished, click Submit Changes to save your changes. To configure the IP Tunnel Hello period, do the following: 1. Establish a Web browser session if you have not already done so. For more information, see Establishing a Web Browser Session on page 2.
  • Page 43 AT-WL2411 Wireless Access Point Installation Guide To configure the 802.11b HR radio Hello period, do the following: 1. Establish a Web browser session if you have not already done so. For more information, see Establishing a Web Browser Session on page 2.

  • Page 44: Configuring Ethernet Or Ip Tunnel Port Control

    3. Click Wireless Bridging. The Wireless Bridging screen appears. Figure 13 Wireless Bridging Screen 4. Click the Hello Period down arrow, and choose a hello period. When you are finished, click Submit Changes to save your changes. Configuring This section explains how to enable and disable port control for the Ethernet network and for IP Tunnels.

  • Page 45: Setting Arp Minutes

    AT-WL2411 Wireless Access Point Installation Guide Setting ARP The UAP periodically sends an unsolicited ARP request so that routers can update their routing tables. The request enables a network Minutes management platform to learn about the UAP on the network by querying routers.

  • Page 46: Setting Root Priority

    Setting Root The root priority determines whether a particular UAP is a candidate to become the root of the spanning tree. The UAP with the highest root Priority priority becomes the root of the network spanning tree whenever the UAP is powered on and active. The Ethernet segment that has the root attached to it is the primary LAN.

  • Page 47: Configuring The Ap Name

    16 characters long. When you are finished, click Submit Changes to save your changes. Configuring the The AT-WL2411 UAP contains a simple DHCP server that you can use to provide DHCP server functions for small installations where no other AT-WL2411 UAP DHCP server is available.
  • Page 48 To configure the AT-WL2411 UAP as a DHCP server, do the following: 1. Establish a Web browser session if you have not already done so. For more information, see Establishing a Web Browser Session on page 2. Enter an IP address and a subnet mask for the UAP.
  • Page 49 AT-WL2411 Wireless Access Point Installation Guide b. Configure the DHCP server. When you are finished, click Submit Changes to save your changes. The following table explains each parameter. Parameter Explanation Low Address Specifies the low IP address in the range of IP addresses available to the DHCP server for distribution to DHCP clients.
  • Page 50 Parameter Explanation If the destination subnet is not the same subnet as the UAP’s Ethernet, the destination MAC address is changed to the IP router that has been configured for the access point. If the access point belongs to the subnet, the AP converts the MAC address to the MAC address that belongs to the destination IP address.

  • Page 51: Configuring The At-Wl2411 Uap As A Nat Server

    AT-WL2411 Wireless Access Point Installation Guide Unsupported DHCP Options The DHCP server implemented in the AT-WL2411 UAP does not support any DHCP options other than those listed. The DHCP server disregards any DHCP options that are not explicitly required by the DHCP specification.
  • Page 52 3. Click Global Flooding. The Global Flooding screen appears. Figure 16 Global Flooding Screen 4. Configure the Global Flooding parameters. When you are finished, click Submit Changes to save your changes.
  • Page 53 AT-WL2411 Wireless Access Point Installation Guide The following table explains each parameter. Parameter Explanation Multicast Flood Determines the flooding structure for multicast Mode frames with unknown destination addresses. Universal Allows any node to communicate with any other node. Hierarchical Allows nodes in the wireless network to communicate with nodes on the primary LAN but not with other wireless devices.

  • Page 54: Configuring Global Rf Parameters

    Configuring You can set configuration parameters in the root UAP that are distributed throughout the network. All UAPs that are root candidates Global RF should have the same global RF parameters. Parameters Note that several of the global RF parameters have a Set Globally parameter that you can enable or disable.
  • Page 55 AT-WL2411 Wireless Access Point Installation Guide 4. Configure the Global RF Parameters. When you are finished, click Submit Changes to save your changes. The following table explains each parameter. Parameter Explanation RFC1042/DIX Determines how the access point will handle the...
  • Page 56 Parameter Explanation S-UHF/900 MHz Specifies the amount of time that a wireless station Awake Time stays awake when radios are inactive. A sleeping station is less responsive to radio activity; however, the longer a station is kept fully awake, the larger the drain on the battery.

  • Page 57: Configuring The Radios

    Chapter 4 Configuring the Radios This chapter explains how to configure the 802.11b HR radio in the AT- WL2411 access point.. Configuring the 802.11b HR Radio 1. Establish a Web browser session if you have not already done so. For more information, see Establishing a Web Browser Session on page...
  • Page 58 2. Click IEEE 802.11b Radio. The IEEE 802.11b Radio screen appears. Figure 18 IEEE 802.11b Radio Screen 3. Configure the parameters for the radio. When you have finished, click Submit Changes to save your changes. The following table explains each parameter. Parameter Explanation Port Control...
  • Page 59 AT-WL2411 Wireless Access Point Installation Guide Parameter Explanation Frequency The frequency is the particular frequency within the 2.4 to 2.5 GHz range that the UAP uses to transmit and receive packets. The available frequencies are country-dependent and are determined by the radio.

  • Page 60: Worldwide Frequencies For The 802.11B Hr Radio

    Worldwide Channel ETSI France Japan Israel Frequencies for 2412 2412 2412 the 802.11b HR Radio 2417 2417 2417 2422 2422 2422 2422 (default) 2427 2427 2427 2432 2432 2432 2437 2437 2437 2442 2442 2442 2447 2447 2447 2452 2452 2452 2457 2457...

  • Page 61: Configuring Voice Over Ip

    AT-WL2411 Wireless Access Point Installation Guide Configuring You can specify what type of traffic can be delivered to your 802.11b HR port. You can use a single 802.11b HR radio to support both voice and Voice Over IP data communications over the same radio.

  • Page 62: Configuring Advanced 802.11B Hr Radio Parameters

    Configuring You can configure other parameters for the 802.11b HR radio, such as Data Rate, Medium Reservation, and Microwave Oven Robustness. Click Advanced Advanced Configuration to configure these and other parameters. 802.11b HR Radio To configure advanced parameters, do the following: Parameters 1.
  • Page 63 AT-WL2411 Wireless Access Point Installation Guide Use the following table to configure advanced parameters. Parameter Description Data Rate Use Data Rate to choose the rate at which the UAP transmits data. Data Rate Disable this parameter to prevent the radio from...
  • Page 64 Parameter Description Network Name Use this parameter to determine if terminals with an Security SSID (Network Name) setting of ANY or NULL will associate with any access point. 802.11 Compliant Allows terminals with an SSID setting of ANY or NULL to associate with the access point.

  • Page 65: Configuring Wep

    AT-WL2411 Wireless Access Point Installation Guide Configuring WEP Click WEP Configuration under the IEEE 802.11b Radio menu to set WEP configuration parameters. This option appears only if your 802.11b HR radio supports WEP encryption and you enabled WEP Encryption. To set WEP configuration parameters, do the following: 1.
  • Page 66 4. Set the parameters for WEP configuration. When you are finished, click Submit Changes to save your changes. The following table explains each parameter. Parameter Explanation WEP Receive Use this parameter to determine if the UAP will Data receive transmissions from end devices that are not using WEP.

  • Page 67: Configuring Wireless Hops

    AT-WL2411 Wireless Access Point Installation Guide Configuring Wireless Hops A hop occurs when data from an end device moves from one access point to another via the radio ports. At least two access points must be configured for wireless hops: one as a master and the other as a station.
  • Page 68 Configuration Example: Single Radio on Remote LAN Segment Following is an example of how you might configure a wireless hop using a single radio on the remote LAN segment. The advantages and disadvantages of using this configuration are listed below. Advantages Disadvantages Does not require WEP keys.

  • Page 69: Configuring Node Type

    AT-WL2411 Wireless Access Point Installation Guide Configuring Use the node type parameter to configure a radio as a Master or Station. You can configure node type only when wireless hops is enabled. Node Type To configure node type, do the following: 1.

  • Page 70: Configuring Ieee 802.11B Uaps For Bridging

    3. Click Wireless Bridging. The Wireless Bridging screen appears. Figure 22 IEEE 802.11b Wireless Bridging Screen 4. Change node type to "station." When you are finished, click Submit Changes to save your changes. Configuring To use IEEE 802.11b radios for wireless bridging, you must configure one UAP as a master and the second as a station.
  • Page 71 AT-WL2411 Wireless Access Point Installation Guide 2. Configure the LAN ID (Domain). For more information, see Configuring the LAN ID (Domain) on page 45. 3. Configure the Security ID, Channel, and Subchannel. For more information see Configuring the 802.11b HR Radio on page 57.

  • Page 72: Configuring Filters And Ip Tunnels

    Chapter 5 Configuring Filters and IP Tunnels This chapter explains how to configure filters and tunnels. Configuring Ethernet Filters You can set both Ethernet and IP tunnel filters, and you can create protocol filters for both predefined and user-defined protocol types. In addition, you can define arbitrary frame filters based on frame content.

  • Page 73: Using Frame Type Filters

    AT-WL2411 Wireless Access Point Installation Guide 3. Click Address Table. The Address Table screen appears. Figure 23 Address Table Screen 4. Enter up to 20 MAC addresses. When you are finished, click Submit Changes to save your changes. Using Frame You can establish filters for common networking protocols such as IP, Novell IPX, and 802.2 LLC.
  • Page 74 Scope Can be set to Unlisted or All. If you select All, then all frames of that type are unconditionally passed or dropped, depending on the action specified. If you select Unlisted, frames of that type are passed or dropped only if the frame type is not listed in the predefined or customizable tables.
  • Page 75 AT-WL2411 Wireless Access Point Installation Guide The following table explains various frame types. Frame Type Explanation DIX IP TCP Ports Primary Internet Protocol Suite (IP) transport DIX IP UDP Ports protocols. SNAP IP TCP Ports SNAP IP UDP Ports DIX IP Other...
  • Page 76 To set predefined subtype filters, do the following: 1. Establish a Web browser session if you have not already done so. For more information, see Establishing a Web Browser Session on page 2. Click Ethernet, and then click Ethernet Filters. The Ethernet screen appears.
  • Page 77 AT-WL2411 Wireless Access Point Installation Guide Value Refer to the following table for the value for a specific subtype. The value must be two hex pairs. You must enter port values as decimals; for example enter "23." for port 23. The UAP displays the hexadecimal equivalent in the value field on the menu.

  • Page 78: Configuring Advanced Filters

    3. Click Customizable Subtype Filters. The Ethernet Customizable Subtype Filters screen appears. Figure 26 Ethernet Customizable Subtype Filters Screen 4. Configure each parameter to the desired values. When you are finished, click Submit Changes to save your changes. Configuring You can use advanced filters if you need more flexibility in your filtering. Settings for advanced filters execute after those for other filters;...
  • Page 79 AT-WL2411 Wireless Access Point Installation Guide Setting Filter Values You can associate an ID with a pattern value by selecting a filter and then entering an ID and a value. All values with the same value ID belong to the same list.
  • Page 80 Setting Filter Expressions You can set filter expressions by specifying parameters for packet filters. You can also create a filter expression, which is executed in ascending order based on the ExprSeq values until the UAP determines whether to pass or drop the frame. To set filter expressions, do the following: 1.
  • Page 81 AT-WL2411 Wireless Access Point Installation Guide The next table explains each parameter. Parameter Explanation ExprSeq You can use the Expression Sequence parameter to chain expressions together for filtering. The ExprSeq parameter works with the Action parameter; for example, if action is set to And, then the next sequence in another expression is processed.
  • Page 82 Ethernet Advanced Filter Example The following example shows how to use Ethernet Advanced Filters to discard all DIX IP multicast frames except those from a selected list of Ethernet stations. Set the following filter values for this example. Figure 29 Filter Values Screen - Example Three value entries have the same value ID of 3 to demonstrate how to enter a list.
  • Page 83 AT-WL2411 Wireless Access Point Installation Guide Set the first filter expression as shown below. Figure 30 Filter Expressions Screen #1 - Example The following table explains the values used in the first filter expression. Parameter Value Explanation ExprSeq This is the first expression.
  • Page 84 Parameter Value Explanation Value ID Use the value from the Filter Values menu whose value ID is 2. Action If this filter expression is true, continue to the next expression. Set the second filter expression as shown below. Figure 31 Filter Expressions Screen #2 - Example The following table explains the values used in the second filter expression.
  • Page 85 AT-WL2411 Wireless Access Point Installation Guide Parameter Value Explanation Mask ffff Check two bytes for an exact match. Compare the value at the offset to the value specified on the Filter Values menu to see if they are equal. (If the value at the offset...
  • Page 86 The following table explains the values used in the third filter expression. Parameter Value Explanation ExprSeq This is the third expression. Offset The data for this expression begins at an offset of 6 bytes from the beginning of the destination address.

  • Page 87: Configuring Ip Tunnel Filters

    AT-WL2411 Wireless Access Point Installation Guide Configuring IP Tunnel Filters You can set both Ethernet and IP tunnel filters, and you can create protocol filters for both predefined and user-defined protocol types. In addition, you can define arbitrary frame filters based on frame content.

  • Page 88: Configuring Ip Addresses

    Configuring IP You can define an IP address for which the access point can originate tunnels if it is functioning as the root for the network. The tunnel can be Addresses configured using a class D multicast IP address. Allied Telesyn’s default is 224.0.1.65.
  • Page 89 AT-WL2411 Wireless Access Point Installation Guide Using Frame Type Filters Permanent IP output port filters prevent unwanted frame forwarding through an IP tunnel. For detailed information about frames that are never forwarded, see "Frame Types That Are Never Forwarded" in Appendix B.
  • Page 90 To set frame type filters, do the following: 1. Establish a Web browser session if you have not already done so. For more information, see Establishing a Web Browser Session on page 2. Click IP Tunnels, and then click Tunnel Filters. The Tunnel Filters screen appears.
  • Page 91 AT-WL2411 Wireless Access Point Installation Guide To set predefined subtype filters, do the following: 1. Establish a Web browser session if you have not already done so. For more information, see Establishing a Web Browser Session on page 2. Click IP Tunnels, and then click Tunnel Filters. The Tunnel Filters screen appears.
  • Page 92 Value Specifies the value of the subtype. Refer to the following table for the value for a specific subtype. The value must be two hex pairs. You must enter port values as decimals; for example enter "23." for port 23. The UAP displays the hexadecimal equivalent in the Value field on the menu.
  • Page 93 AT-WL2411 Wireless Access Point Installation Guide 4. Configure each parameter to the desired values. When you are finished, click Submit Changes to save your changes. The following table describes frame subtypes and their values. Subtype Value DIX-IP-TCP-Port Port value in hexadecimal.

  • Page 94: Creating Ip Tunnels

    Creating IP Tunnels For more information, see Appendix B, "Understanding IP." To create an IP tunnel, do the following: 1. Configure the root UAP to originate the tunnel. 2. Specify the IP addresses of the UAPs that will listen at the other end of each tunnel.
  • Page 95 AT-WL2411 Wireless Access Point Installation Guide Example 1 UAPs 1, 3, 5, and 6 service only IP end devices. These UAPs need to pass IP traffic, but eliminate IPX traffic that does not need to be forwarded to the primary or secondary LAN. Filter the IPX frames in the Ethernet Frame Type Filter table.
  • Page 96 You need to use subtype filters to drop IPX RIP for 802.2, DIX, and 802.3 frames. Use the settings shown next on the Ethernet Predefined Subtype Filter table to filter IPX RIP for 802.2 frames. Settings for Ethernet Filter Example 2 Figure 39 Predefined Subtype Filters Screen - Example...
  • Page 97 AT-WL2411 Wireless Access Point Installation Guide Use the settings shown next on the Ethernet Customizable Subtype Filter table to filter DIX-IPX for 802.3 IPX. Figure 40 Customizable Subtype Filters Screen - Example Example 3 If you have a Windows NT server and want to use DHCP for automatic address assignment for an end device on a remote subnet, you need to set the following filters to allow for the necessary IP tunneling.

  • Page 98: Configuring Mode

    Example 4 If you have a Linux or Unix DHCP server and want to use DHCP for automatic address assignment for an end device on a remote subnet, set DIX-IP-UDP Port to Pass All in the IP Tunnel Frame Type Filter table. Configuring Mode controls whether the UAP listens for an IP tunnel or originates IP tunnel connections with other UAPs.
  • Page 99 AT-WL2411 Wireless Access Point Installation Guide To configure IGMP, do the following: 1. Establish a Web browser session if you have not already done so. For more information, see Establishing a Web Browser Session on page 2. Click IP Tunnels. The IP Tunnels screen appears.

  • Page 100: Troubleshooting And Maintaining The At-Wl2411 Uap

    Chapter 6 Troubleshooting and Maintaining the AT-WL2411 UAP This chapter explains how to upgrade the AT-WL2411 UAP firmware. This chapter also explains how to troubleshoot and maintain the UAP. Analyzing the AT-WL2411 UAP You can view different parameters configured for the AT-WL2411 UAP, including port statistics, connections, and a configuration summary.

  • Page 101: Viewing Port Statistics

    AT-WL2411 Wireless Access Point Installation Guide 3. Click AP Connections. The read-only AP Connections screen appears. Figure 41 AP Connections Screen Viewing Port The Port Statistics screen shows the total number of frames and bytes that the access point has transmitted and received since it was last Statistics booted.

  • Page 102: Viewing The Configuration Summary

    3. Click Port Statistics. The read-only Port Statistics screen appears. Figure 42 Port Statistics Screen Viewing the Configuration Summary summarizes the major configuration settings and installed hardware for the access point. Configuration Summary To view the configuration summary, do the following: 1.

  • Page 103: Viewing Information About The Uap

    AT-WL2411 Wireless Access Point Installation Guide 3. Click Configuration Summary. The read-only Configuration Summary screen appears listing each parameter in the access point and its current configuration. Figure 43 Configuration Summary Screen Viewing About this Access Point shows information about the UAP including software versions, radio versions, and MAC addresses.
  • Page 104 3. Click About this Access Point. The read-only About this Access Point screen appears. Figure 44 About this Access Point Screen...

  • Page 105: Understanding The Led Lighting Sequence

    AT-WL2411 Wireless Access Point Installation Guide Understanding the LED Lighting Sequence When the UAP is powered on, the LEDs flash as the UAP boots and performs internal diagnostics. The table below describes the LED activity during the boot process. Power...

  • Page 106: Upgrading The At-Wl2411 Uap Firmware

    Upgrading the AT-WL2411 UAP Firmware For optimal performance, you should install the most current firmware version on all the UAPs in your network. Firmware releases are available from the Product Support Page on the Allied Telesyn Web site. You can install the firmware release using a Web browser session.
  • Page 107 AT-WL2411 Wireless Access Point Installation Guide To upload the firmware release using HTTP, do the following: 1. Establish a Web browser session if you have not already done so. For more information, see Establishing a Web Browser Session on page 2.
  • Page 108 2. Click Software Upgrade (TFTP). The Software Upgrade screen appears. Figure 46 Software Upgrade Screen (TFTP)
  • Page 109 AT-WL2411 Wireless Access Point Installation Guide 3. Click Automated Software Download. The Automated Software Download screen appears. Figure 47 Automated Software Download Screen 4. Configure the following parameters: Server IP Address The IP address of your TFTP server. Script File Name The location of the upgrade script file on the TFTP server.

  • Page 110: Using A Serial Connection

    Using a Serial To upgrade the firmware using a serial connection, you must have the firmware release files on your PC and have an RS-232 null-modem cable Connection connecting the UAP to your PC. For more information, see the release notes that accompany the firmware upgrade.
  • Page 111 AT-WL2411 Wireless Access Point Installation Guide b. Click Transfer, and then click Send File. The Send File dialog box appears. Figure 48 Send File Dialog Box c. Click the Protocol down arrow and choose Ymodem. d. Browse to the location where UAP.DNL is saved. Double-click this file.

  • Page 112: Using A Tftp Transfer

    Using a TFTP To upgrade the firmware using a TFTP transfer, you must have a TFTP server installed. When you execute the script file, UPGRADE.DNL, that is Transfer included with the firmware release, a TFTP transfer copies all the startup and data files to the UAP.

  • Page 113: Upgrading Other Uaps

    AT-WL2411 Wireless Access Point Installation Guide Upgrading Other UAPs After you have upgraded the root UAP, you can upgrade the other UAPs in your network. Note You MUST perform the Upgrade Other UAPs from the root UAP. To upgrade other UAPs, do the following: 1.
  • Page 114 3. Click the check box next to each UAP you want to upgrade to select, or click Select All Access Points to select all of your UAPs. 4. Click the Now down arrow and select a time to start the upgrade. You can choose to start the upgrade immediately or you can delay the start of the upgrade one to twelve hours.

  • Page 115: Using Snmp

    AT-WL2411 Wireless Access Point Installation Guide Using SNMP The UAP supports SNMP management. Contact your Allied Telesyn representative for information about obtaining a copy of the MIB. The passwords for accessing the SNMP community table are shown below. Type of Access...
  • Page 116 3. Configure the SNMP community parameters. When you are finished, click Submit Changes to save your changes. The following table explains the SNMP community parameters. Parameter Description SNMP Read Community Allows read-only access. Defaults to public. SNMP Write Community Allows read/write access. Defaults to CR52401.

  • Page 117: Troubleshooting The Radio

    AT-WL2411 Wireless Access Point Installation Guide Troubleshooting the Radio If the radio is faulty or the configuration matrix string is incorrect, the LEDs on the UAP display the following pattern after the UAP boots: Power Wireless #1 Wired LAN Root/Error If you are connected to the UAP through a serial connection, an error message also appears on your terminal or PC.

  • Page 118: Commonly Asked Technical Support Questions

    Commonly Asked Technical Support Questions Refer to the following table for solutions and answers to common problems and questions concerning the AT-WL2411 unit. Problem/Question Possible Solution/Answer Is the UAP fully booted? When the UAP is fully booted, the Power LED remains steady green and the Wired LAN LED flashes.
  • Page 119 AT-WL2411 Wireless Access Point Installation Guide Problem/Question Possible Solution/Answer The end device cannot synch to the UAP. If you are using 802.11b HR radios: Verify that the end device and the UAP have the same frequency and network name. The end devices are unable to roam to Roaming through switches requires backward another AT-WL2411.
  • Page 120 Problem/Question Possible Solution/Answer 1. Click TCP/IP Settings and verify that the IP Router You cannot establish an IP tunnel to a UAP (Gateway) address is correct. on a remote subnet. 2. Click Spanning Tree Settings and verify that the UAPs on both ends of the tunnel have the same LAN ID.

  • Page 121: Getting Help With Your Installation

    AT-WL2411 Wireless Access Point Installation Guide Getting Help with Your Installation The AT-WL2411 UAP is designed to be easy to install and configure; however, you may need to call Allied Telesyn Technical Support if you have problems. Before calling, be sure you can answer the following...

  • Page 122: Chapter 7 Advanced Features

    For instance, you typically download a new firmware version into an inactive segment and then make that segment active the next time the UAP boots. For more information on upgrading the UAP firmware, see Chapter 6, "Troubleshooting and Maintaining the AT-WL2411 UAP."...

  • Page 123: Entering The Uap Monitor

    AT-WL2411 Wireless Access Point Installation Guide Entering the You can access the UAP monitor only through the serial port and only during the boot process. UAP Monitor To enter the UAP monitor, do the following: Press any key on the keyboard when you see this message displayed during the boot process: <Press any key within 5 seconds to enter the...

  • Page 124: Using Uap Monitor Commands

    Using UAP Monitor Commands When you are in the UAP monitor, the UAP prompt (uap>) appears. You can display a list of UAP monitor commands anytime you see the UAP prompt. To display UAP monitor commands, do the following: Press a letter or number key on the keyboard, and then press Enter.
  • Page 125 AT-WL2411 Wireless Access Point Installation Guide Purpose Performs a Ymodem batch protocol download of a file into the flash segment that is specified by s. Syntax FX s where s is segment 1, 2, 3, or 4. Purpose Displays the flash file system directory, including information about the boot file.
  • Page 126 You must enter the baud rate as a whole number with no commas. For example, to enter a baud rate of 19,200, you must enter 19200. Setting Autobaud Using the SR Command You can use autobaud to let the UAP set its baud rate to match the baud rate of your terminal, up to a baud rate of 115,200.

  • Page 127: Using Service Mode Commands

    AT-WL2411 Wireless Access Point Installation Guide Using Service Mode Commands Use service mode to perform certain file functions. Because service mode commands can cause undesirable results if not properly executed, you should contact Allied Telesyn Technical Support for assistance if you are unsure about the proper procedure to use.

  • Page 128: Ffr

    Purpose Runs a program that is specified by f, from a location specified by s. Syntax FFR f (s) where: is the program name. is the optional segment location of the program. Example: To run program UAPBOOT.PRG from segment 1, enter: FFR UAPBOOT.PRG 1 Purpose Returns the UAP to normal mode from quiet mode.

  • Page 129: Using Test Mode Commands

    AT-WL2411 Wireless Access Point Installation Guide Using Test Mode Commands Within the UAP monitor, test mode allows you to perform certain test functions. Because the commands can cause undesirable results if not properly executed, you should contact Allied Telesyn Technical Support for assistance if you are unsure about the proper procedure to use.
  • Page 130 To display test mode commands, do the following: Type any letter or number other than B and press Enter. The test commands appear on the screen. UAP Monitor V4.03 July 17, 2000 <Press any key within 5 seconds to enter the UAP monitor> uap>test Enter password : ******** test>d...

  • Page 131: Using Console Command Mode

    AT-WL2411 Wireless Access Point Installation Guide Using Console Command Mode Another way you can access the UAP file system is through Console Command mode. Use Console Command mode to upgrade UAPs using TFTP and Script files. To enter Console Command mode, do the following: Choose Command Console from the Maintenance menu.

  • Page 132: Using Console Commands

    Using Console Commands This section describes the console commands. Purpose Use the fb command to make an inactive segment the active segment. Syntax fb boot segment data segment where: boot segment is the name or number of the boot segment to be activated.

  • Page 133: Fdel

    AT-WL2411 Wireless Access Point Installation Guide Purpose Use the fd command to display the flash file system directory, which includes information about the boot file. Syntax Use the fd command to ensure that the correct version of the file is in the active boot segment.

  • Page 134: Script

    Purpose Erases the files in a particular segment. To recover the files after they have been erased, you must reload them from another source. Syntax fe segment where segment is the name or number of the segment to be erased. Example To erase the contents of segment 1, enter: fe 1...

  • Page 135: Using Sdvars Commands

    AT-WL2411 Wireless Access Point Installation Guide Using Sdvars Commands Use sdvars commands in Console Command mode to manipulate certain software download variables. Sdvars commands support both GET and SET arguments. You can enter sdvars commands to GET a software download object, and then issue the sdvars command using the SET argument to assign the object a specified value.

  • Page 136: Sdvars Set Starttime

    sdvars set Purpose starttime Sets the internal variable starttime. Starttime is a countdown time such that when zero is reached, the software download process begins. You set this variable to reflect how long into the future the UAP is to begin downloading and executing the script file from the TFTP server.

  • Page 137: Sdvars Set Terminate

    AT-WL2411 Wireless Access Point Installation Guide Example Consider the following script file commands: sdvars set checkpoint 1 fe ab sdvars set checkpoint 2 TFTP get * uap.prg ab sdvars set checkpoint 3 reboot When the software download is started, you can use SNMP to query its progress by reading the checkpoint variable.

  • Page 138: Sdvars Set Nextpoweruptime

    where: none does not change the active segments. The default is none. Also, when the reboot is completed, the UAP resets this value to none. boot changes the inactive boot segment to the active boot segment. data changes the inactive data segment to the active data segment.

  • Page 139: Using Tftp Commands

    AT-WL2411 Wireless Access Point Installation Guide Using TFTP Commands TFTP commands are file transfer commands that you execute when you are in Console Command mode. A UAP can act as either a client or server in the TFTP environment. As a server, the UAP can service read and write requests from a UAP client.
  • Page 140 local filename is the name you wish to call the file on the UAP. The name must include a segment number or name followed by a colon. An actual filename is optional. If only the segment name is supplied, the filename is set equal to the filename that is embedded in the file header on the server.

  • Page 141: Tftp Put

    AT-WL2411 Wireless Access Point Installation Guide tftp put Purpose Copies a file from a client to the server or to another UAP. Syntax tftp put IP address foreign filename local filename where: IP address is the IP address of the server. You can use an asterisk (*) here if you want to use the value in the serveripaddress.

  • Page 142: Tftp Server Log

    tftp server log Purpose Your UAP can function as a TFTP server. You can use the TFTP server log command to save a history of TFTP client requests. Syntax tftp server log The TFTP server log contains useful TFTP server status information. The log begins when you set up the server.
  • Page 143 AT-WL2411 Wireless Access Point Installation Guide The following table lists error messages that can be issued from the TFTP server. These messages are sent to the client and are meant to be read from the client perspective. Error Message Explanation...

  • Page 144: Appendix A Specifications

    Appendix A Specifications This appendix provides specifications and system defaults for reference purposes only. Actual product performance and compliance with local telecommunications regulations may vary from country to country. Allied Telesyn only ships products that are type approved in the destination country.

  • Page 145: Other Specifications

    AT-WL2411 Wireless Access Point Installation Guide Other Specifications Architecture Transparent bridge Ethernet interfaces 10BaseT (twisted-pair) Data rate 10 Mbps (Ethernet) Media Access protocol CSMA/CD Ethernet compatibility Ethernet packet types and Ethernet addressing Filtering rate 14,880 frames per second Filters (protocol)

  • Page 146: Radio Specifications-Ieee 802.11B Hr

    Radio Specifications-IEEE 802.11b HR Data rate 11 Mbps (High), 5.5 Mbps (Medium), 2 Mbps (Standard), 1 Mbps (Low) with automatic fallback for increased range Channels 11 (North America), 13 (Europe), 4 (France), 1 (Japan) Range (11 Mbps) 160 m (525 ft) open environment 50 m (165 ft) semi-open environment 24 m (80 ft) closed environment Frequency band...

  • Page 147: Default Settings

    AT-WL2411 Wireless Access Point Installation Guide Default Settings The factory default settings for the UAP are listed in this section. You can record the settings for your installation in each table for reference. TCP/IP Settings Menu Defaults Parameter Range Default...

  • Page 148: Global Flooding Menu Defaults

    Parameter Range Default Site Setting Name Ethernet Enabled/ Enabled Bridging Disabled Secondary LAN 0 to 7 Bridge Priority Global Flooding Menu Defaults Parameter Range Default Site Setting Name Multicast Flood Universal, Disabled Mode Hierarchical, or Disabled Multicast Enabled/ Enabled Outbound to Disabled Terminals Multicast...

  • Page 149: Ethernet Port Configuration Menu Defaults

    AT-WL2411 Wireless Access Point Installation Guide Parameter Range Default Site Setting Name 900 MHz Frag Size Set Globally Enabled/Disabled Disabled Value S-UHF/900 MHz Awake Time Set Globally Enabled/Disabled Disabled Value RFC1042 Types to Pass Through 1 through 20 Ethernet Port...

  • Page 150: Advanced Filters Menu Defaults

    Parameter Range Default Site Setting Name Action Pass/Drop Pass Subtype DIX-IP-TCP-Port, DIX-IP-TCP-Port DIX-IP-UDP-Port, DIX-IP-Protocol, DIX-IPX-Socket, DIX-EtherType, SNAP-IP-TCP- Port, SNAP -IP-UDP- Port, SNAP -IP- Protocol, SNAP -IPX- Socket, SNAP -EtherType, 802.3-IPX-Socket, 802.2 -IPX- Socket, or 802.2-SAP Advanced Filters Menu Parameter Defaults Range Default Site Setting...

  • Page 151: Ip Tunnels Menu Defaults

    AT-WL2411 Wireless Access Point Installation Guide IP Tunnels Menu Defaults Parameter Range Default Site Setting Name Port Control Enabled/Disabled Enabled Mode Listen/Originate If Originate If Root Root IGMP Enabled/Disabled Disabled Hello Period 1, 2, or 3 Seconds 2 IP Addresses 4 nodes, 0 to 255 0.0.0.0...

  • Page 152: Network Management Menu Defaults

    Parameter Range Default Site Setting Name Subtype DIX-IP-TCP-Port, DIX-IP-TCP-Port DIX-IP-UDP-Port, DIX-IP-Protocol, DIX-IPX-Socket, DIX-EtherType, SNAP-IP-TCP-Port, SNAP -IP-UDP- Port, SNAP -IP-Protocol, SNAP -IPX-Socket, SNAP -EtherType, 802.3-IPX-Socket, 802.2 -IPX-Socket, 802.2-SAP Value 00.00 Network Management Parameter Menu Defaults Range Default Site Setting Name Community Strings SNMP Read Community...

  • Page 153: Ieee 802.11B Hr Radio Menu Defaults

    AT-WL2411 Wireless Access Point Installation Guide Parameter Range Default Site Setting Name Service Enabled/Disabled Enabled Password Telnet Access Enabled/Disabled Enabled Browser Access Enabled/Disabled Enabled SNMP Access Enabled/Disabled Enabled RADIUS Client Configuration Enabled/Disabled Disabled Access Server 1 IP Address 4 nodes, 0 to 255 0.0.0.0...
  • Page 154 Parameter Name Range Default Site Setting Hello Period 1, 2, or 3 Seconds 2 WEP Configuration WEP Receive Unencryption Encryption Data Allowed/ Required Encryption Required WEP Transmit WEP Key 1 (blank) WEP Key 2 (blank) WEP Key 3 (blank) WEP Key 4 (blank) Advanced Configuration...

  • Page 155: Appendix B Understanding Ip

    Appendix B Understanding IP This appendix provides additional information about IP. An Overview of IP The presence of an IP router generally defines the physical boundary of a wireless network. Multiple independent wireless networks may exist, each with its own LAN ID, root, and set of end devices. In this environment, an end device can only operate within the limited coverage area of its own network and cannot roam across IP subnet boundaries.
  • Page 156 The IP extension to the open wireless LAN architecture enables a wireless LAN installation to span multiple IP subnets. IP uses a standard IP protocol called Generic Routing Encapsulation (GRE) to encapsulate a frame within an IP/GRE packet that uses normal IP routing to pass through IP routers.
  • Page 157 AT-WL2411 Wireless Access Point Installation Guide The IP port differs from the physical ports within the UAP. The IP port is a logical port that provides IP encapsulation services for frames that must be routed to reach their destination. After encapsulation, frames are...

  • Page 158: Operation

    Operation IP uses IP encapsulation to establish a virtual LAN segment through IP routers. The virtual LAN segment includes the home IP subnet and logically extends to include end devices attached to UAPs on remote IP subnets. An IP tunnel becomes a branch in the spanning tree. UAPs on remote subnets can be directly connected to an IP tunnel or indirectly connected through another UAP on a remote subnet.

  • Page 159: Establishing And Maintaining Tunnels

    AT-WL2411 Wireless Access Point Installation Guide Establishing If mode is set to originate in the root UAP, the root sends hello messages to each IP address contained in its IP address list. A UAP on a remote IP subnet can automatically establish an IP tunnel if it receives an IP hello Maintaining message from the root UAP.

  • Page 160: Usage Guidelines

    Usage Guidelines This section will help you understand operational requirements for IP. Addressing for End devices that are using IP must be assigned IP addresses that are on the home IP subnet. The home IP subnet is the subnet connected to the IP Stations root UAP.
  • Page 161 AT-WL2411 Wireless Access Point Installation Guide Bridging can be enabled on remote IP subnets if IP is used to provide mobility for IP and other non-routable protocols, because IP has built-in safeguards and filters for protecting the operation of IP routers and...

  • Page 162: Ip Safeguards

    IP Safeguards The purpose of a router is to segment traffic on a local network and selectively forward frames destined to network addresses on other networks. Routers avoid problems such as broadcast storms that are often associated with bridges. IP is designed to safely and transparently coexist with routed IP installations while supporting mobility for end devices.

  • Page 163: Configuring The Ip Tunnel Port

    AT-WL2411 Wireless Access Point Installation Guide Configuring the IP Tunnel Port The IP port is a logical port and does not exist in a physical sense. For ease of configuration, IP is referred to as a port. The IP port provides IP encapsulation services for frames that must be routed to reach their destinations.
  • Page 164 3. Configure the parameters for the IP port. When you are finished, click Submit Changes to save your changes. The following table explains each parameter. Parameter Explanation Port Control Enables or disables the port. Controls whether the UAP listens for the IP tunnel or Mode originates IP tunnel connections with other UAPs.

  • Page 165: Permanent And User-Defined Filters

    AT-WL2411 Wireless Access Point Installation Guide Permanent and User-Defined Filters UAP provides extensive filtering capabilities so that only traffic destined to end devices is allowed. ARP Server For wireless IP devices, ARP requests that originate on the home subnet must be forwarded outbound to remote IP subnets. An ARP server capability can be enabled to restrict the propagation of ARP packets through tunnels to only those packets that are destined for end devices.

  • Page 166: User-Defined Filters

    IP ICMP (Internet Control Message Protocol) types: IPv6 Mobile IP Router Advertisement Router Selection IP/UDP (User Datagram Protocol) frames with the following destination protocol port numbers: BGP (179) (Border Gateway Protocol) RAP (38) (Route Access Protocol) RIP (520) (Routing Information Protocol) * IP/TCP frames with the following destination or source protocol port numbers: * BGP (179) (Border Gateway Protocol)

  • Page 167: Frame Forwarding

    AT-WL2411 Wireless Access Point Installation Guide Frame Forwarding MAC frames originating on the home IP subnet are encapsulated in the root UAP, forwarded through the IP network, deencapsulated by the UAP at the remote end of the IP tunnel, and forwarded to the appropriate UAP (if necessary) for delivery to the intended end device.

  • Page 168: End Device Mobility

    End Device As end devices move through a facility, they roam between UAP coverage areas. In large installations, these UAPs may be on different IP Mobility subnets. IP is designed to support rapid roaming in these environments. A roam requires updates to the forwarding databases in the new UAP, root UAP, previous UAP, and any intermediate UAPs.

  • Page 169: Mobile Ip Comparison

    AT-WL2411 Wireless Access Point Installation Guide Mobile IP Comparison The Internet Engineering Task Force developed RFC 2002, IP Mobility Support, commonly referred to as Mobile IP, to provide mobility for IP hosts. Mobile IP is designed primarily to address the needs of IP end devices that may move between geographically separated locations.
  • Page 170 Issue Mobile IP Scalability Has no inherent No practical limitations using IGMP. limitations. Special network Requires home and Standard network feature. No additional network software foreign agents software is required. located on each network or subnetwork.

  • Page 171: Configuring An Ip Tunnel

    AT-WL2411 Wireless Access Point Installation Guide Configuring an IP Tunnel 1. Choose the home subnet. Ideally, you should choose the subnet that contains gateways or servers for end devices; however, these servers may be on other subnets if necessary. Note that you can create a home subnet for end devices.

  • Page 172: Topologies

    Topologies The creation of tunnels between the root UAP and remote IP subnets is controlled by three operational parameters: The IP address list in the root UAP, configured through the IP port Secondary LAN bridge priority settings Enabling/disabling IP ports A tunnel can never be established on a disabled IP port.

  • Page 173: Igmp

    AT-WL2411 Wireless Access Point Installation Guide IGMP IP multicast relies on an IP protocol called Internet Group Management Protocol (IGMP) for multicast packet distribution. An IP router will only forward an IP multicast packet to those IP subnets that have hosts that participate in the respective multicast group.

  • Page 174: Appendix C Glossary

    Appendix C Glossary ARP (Address Resolution Protocol) The protocol used by TCP/IP networks to relate IP addresses with the physical network addresses of network interfaces. BFSK (Binary Frequency Shift Key) A broadcasting method that lengthens the range but halves the throughput as compared to the QFSK method.
  • Page 175 AT-WL2411 Wireless Access Point Installation Guide data link tunneling A UAP encapsulates an Ethernet frame in a data frame and forwards the frame to the next UAP on the path to the final destination. Data link tunneling is used to make mobility transparent to the underlying network or to isolate the radio traffic from terminals on an Ethernet segment.
  • Page 176 flooding A frame is flooded when the destination location is unknown. The destination location of a multicast frame is never known. Unicast and multicast flooding parameters determine how a flooded frame is forwarded. home IP subnet The IP subnet that contains the wired primary LAN and any wireless extensions of the subnet.
  • Page 177 AT-WL2411 Wireless Access Point Installation Guide multicast address A form of broadcast address through which copies of the frame are delivered to a subset of all possible destinations that have a common multicast address. non-bridging secondary LAN A secondary LAN that does not have a designated bridge. A non- bridging secondary LAN is used to interconnect UAPs without using wireless hops.
  • Page 178 remote IP subnet A secondary LAN attached to the network through an IP tunnel. root The UAP with the highest root priority becomes the root of the network spanning tree. If the root becomes inactive, the remaining root candidates negotiate to determine which UAP becomes the new root. The root can be used to set system-wide flooding and RF parameters.
  • Page 179 The UAP bridges frames between a wired Ethernet network and a wireless RF network. The UAP can also serve as a bridge between two RF networks. The AT-WL2411 features Radio Independent and Network Independent architecture. unicast address A unique Ethernet address assigned to a single device on the network.
  • Page 180 Wired Equivalent Privacy, a feature that can be enabled in the IEEE 802.11b HR radio that allows data encryption for wireless communications. wireless bridging A wireless link that connects two wired Ethernet segments. Two UAPs can be used to provide a point-to-point or wireless bridge between two buildings, so that wired and wireless devices in each building can communicate with devices in the other building.

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