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Enterasys 802.11 Networking Manual

802.11 wireless
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E N J O Y T H E F R E E D O M O F W I R E L E S S N E T W O R K I N G
802.11 Wireless Networking Guide
E N T E R A S Y S . C O M
P/N 9034042-08

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  • Page 1 E N J O Y T H E F R E E D O M O F W I R E L E S S N E T W O R K I N G 802.11 Wireless Networking Guide E N T E R A S Y S . C O M...
  • Page 3 Enterasys Networks reserves the right to make changes in specifications and other information contained in this document and its web site without prior notice. The reader should in all cases consult Enterasys Networks to determine whether any such changes have been made.

  • Page 5: Table Of Contents

    Preface Intended Audience ............xi Associated Documents .
  • Page 6 802.11 Power Management ........
  • Page 7 Static and Dynamic VLANs ..........2-25 RoamAbout SNMP Management .
  • Page 8 Contents 5 Configuring the Wireless Network In This Chapter............5-1 Configuring APs in an Infrastructure Network .
  • Page 9 RoamAbout R2 Console Port ..........5-28 Access Point 2000 Console Port .
  • Page 10 Contents Using the RoamAbout R2 Console Port ........6-11 Using the Access Point 2000 Console Port .
  • Page 11 Contents B Connecting a Device to the Console Port C ASCII to HEX Conversion Glossary Index...

  • Page 13: Preface

    A RoamAbout wireless network consists of RoamAbout wireless products, such as the RoamAbout R2 Wireless Access Platform, RoamAbout Access Point 2000, RoamAbout PC Card, and other wireless products that use an 802.11 Direct Sequence (DS) compliant radio. This manual describes how to design, install, configure and maintain a RoamAbout wireless network.

  • Page 14: Associated Documents

    RoamAbout R2 Wireless Access Platform Hardware Installation Guide and online help RoamAbout Access Point 2000 Hardware Installation Guide and online help RoamAbout 802.11 PC Card Drivers and Utilities Client CD-ROM Kit RoamAbout 802.11 PC Card Installation Guide RoamAbout 802.11 PC Card Drivers and Utilities CD-ROM Kit RoamAbout 802.11 PC Card Drivers and...

  • Page 15: Document Conventions

    Document Conventions Document Conventions The following icons are used in this document: Icon Meaning CAUTION: Contains information essential to avoid personal injury or damage to the equipment. NOTE: Calls the reader’s attention to any item of NOTE information that may be of special importance. xiii...

  • Page 16: Getting Help

    A description of the problem A description of any action(s) already taken to resolve the problem The serial and revision numbers of all involved Enterasys Networks products in the network A description of your network environment (for example, layout, cable type)

  • Page 17: Wireless Network Configurations

    One or more APs connecting wireless clients to a wired network, using the Workgroup Bridge mode. A wireless client can be any computer with an 802.11 Direct-Sequence (DS) compliant radio card. This type of network is referred to as a wireless infrastructure network.

  • Page 18: Roamabout Ap

    The RoamAbout Access Point 2000 is a wired to wireless bridge. One port connects to an Ethernet LAN. The other port connects to a wireless network. The wireless connection is provided by a RoamAbout 802.11 DS compliant PC Card. The RoamAbout R2 is an expandable wireless access platform designed to support existing, and future, radio technologies and networking requirements.
  • Page 19 Dynamic address learning The forwarding and translating process module automatically adds new source addresses to the address database while the AP is operating. This reverse learning of the address and port association allows automatic network configuration without prior downline loading of configuration data to the AP. Address learning is protocol and management entity independent.

  • Page 20: Roamabout Pc Card

    RoamAbout PC Card RoamAbout PC Card The RoamAbout PC Card is an IEEE 802.11 Direct Sequence (DS) compliant wireless network interface card. The RoamAbout PC Card functions like any standard wired Ethernet card; however, the RoamAbout PC Card uses radio frequencies instead of a cable for the LAN connection.

  • Page 21: Operating System Support

    You can have clients with various operating systems in the same wireless network. Refer to the RoamAbout 802.11 PC Card Drivers and Utilities Setup and Installation Guide for setup and installation information. For the latest version of the RoamAbout drivers, see the RoamAbout web site: http://www.enterasys.com/wireless.

  • Page 22: Wireless Infrastructure Network

    Wireless Infrastructure Network Wireless Infrastructure Network In a wireless infrastructure network, wireless clients communicate with an AP to connect to a wired LAN. A RoamAbout wireless infrastructure network can support clients with various operating systems. The area where a client can communicate with the AP is called a coverage area. To increase the coverage area, you can add APs to the wireless network.
  • Page 23 Figure 1-1: Cells Within a Wireless Infrastructure Network Configuration To allow wireless clients to physically move within a wireless network, the coverage areas should overlap. In Figure 1-1, Cell 1 and Cell 2 share overlapping areas of coverage. As a wireless client moves from Cell 2 to Cell 1, the necessary infrastructure network information is passed from AP2 to AP1 while maintaining LAN connectivity.

  • Page 24: Wireless Client Behavior

    Wireless Infrastructure Network Wireless Client Behavior You can configure the wireless client to connect to a specific wireless network or the first available wireless network. If you configure the client to connect to a specific wireless network, the client establishes a radio connection to the AP in the specified wireless network that provides the best communications quality.

  • Page 25: Lan-To-Lan Configuration

    LAN-to-LAN Configuration You can connect separate LANs over a wireless link by configuring two or more RoamAbout APs to communicate with each other. This is called a LAN-to-LAN configuration. There are two variations of the RoamAbout LAN-to-LAN configuration: Point-to-Point, using the LAN-to-LAN Endpoint Bridge mode, which connects two wired networks.

  • Page 26: Point-To-Multipoint

    LAN-to-LAN Configuration Point-to-Multipoint You can connect wired LANs in different buildings using the LAN-to-LAN Multipoint feature. At least one of the APs is configured as a Multipoint AP, called the Central AP. The Central AP can communicate directly with up to six APs. The six APs are configured as Endpoints, which can only communicate directly to the Central AP.
  • Page 27 LAN-to-LAN Configuration Figure 1-4 provides an example of two Central APs in the same Point-to-Multipoint configuration. In this configuration, six APs are configured to communicate with the same Central AP. You can configure one or more of those six APs as a Central AP to communicate with up to five additional APs.
  • Page 28 LAN-to-LAN Configuration Figure 1-4, Building A is the Central AP for Buildings A1 through A5 and Building B. However, Building B is also the Central AP for Building A and Buildings B1 through B5. You could expand this one further by making Building B3 a Central AP for five other buildings, although adding additional hops may decrease network performance.

  • Page 29: Roamabout R2 Configuration Examples

    The antenna must be placed at least two feet away from the RoamAbout R2. The 802.11 PC Cards must be at least 5 channels apart from each other. Workgroup Mode (both slots) Example Figure 1-6 shows a RoamAbout R2 with both slots configured in Workgroup mode.

  • Page 30: Workgroup Mode And Lan-To-Lan Example

    RoamAbout R2 Configuration Examples Workgroup Mode and LAN-to-LAN Example Figure 1-7 shows two RoamAbout R2s in different buildings using an outdoor directional antenna to connect the LANs in those buildings. Each RoamAbout R2 contains two radio slots; one slot configured in Workgroup mode, and one slot configured in LAN-to-LAN Endpoint Bridge mode.

  • Page 31: Ad-Hoc Network

    Ad-Hoc Network Ad-Hoc Network Wireless ad-hoc networks do not include APs. Instead, the ad-hoc network is a loose association, or workgroup, of computers that can communicate with each other using the PC Card in Ad-Hoc Mode. Figure 1-8 shows an ad-hoc network. The ad-hoc network is also known as a peer-to-peer network or independent network.

  • Page 32: Optional Antennas

    Optional Antennas Optional Antennas The RoamAbout PC Card has two integrated antennas that perform best in an open environment with as few obstacles as possible. Depending on the environment and wireless network configuration, you may need an optional antenna. The following sections describe the types of optional antennas available with the RoamAbout products.

  • Page 33: Range Extender Antenna

    Range Extender Antenna Use the Range Extender Antenna reception quality for situations where the integrated antennas are shielded, such as: The wireless device, such as a desktop client, is close to metal surfaces. The wireless device is installed in a hidden location, such as in a cabinet. Objects shield the wireless device.

  • Page 34: Outdoor Antenna Kit

    Optional Antennas Outdoor Antenna Kit There are two RoamAbout antennas available for outdoor use: 14-dBi directional antenna 7-dBi omni-directional antenna The RoamAbout outdoor antennas support outdoor LAN-to-LAN wireless links that are used to connect separate LANs. The directional antenna is typically used in a Point-to-Point wireless link.

  • Page 35: Understanding Wireless Network Characteristics

    Access Point MAC Addresses RoamAbout R2 MAC Addresses Channel Frequencies Transmit Rate Communications Quality Data Throughput Efficiency AP Density and Roaming RTS/CTS Protocol 802.11 Power Management Security Network Operating System Security RoamAbout AP Secure Access Chapter 2 Characteristics Page 2-11...

  • Page 36: Wireless Network Name

    Wireless Network Name Topic Wired Equivalent Privacy (WEP) Encryption Authentication 802.1X Rapid Rekeying SNMP Community Names Console Port Security Network Protocols Wireless Traffic Spanning Tree Protocol VLANs RoamAbout SNMP Management Wireless Network Name A wireless network name, also called an SSID, is the name of the wireless infrastructure network.

  • Page 37: Access Point Mac Addresses

    Access Point MAC Addresses The MAC address is a unique identifier for networking devices. Each LAN device (including Ethernet cards, bridges, routers, and gateways) is identified by a unique factory-set MAC address: One MAC address for the wired Ethernet interface, which is printed on the AP. One MAC address for the RoamAbout PC Card installed in the AP, which is printed on a label on the back side of the card.

  • Page 38: Channel Frequencies

    Channel Frequencies Channel Frequencies The channel sets the center radio frequency for the wireless device. The RoamAbout PC Card can support up to 14 channels; however, the number of available channels varies in different countries. APs within the same wireless infrastructure network can be set to different channels. You can change the channel in an AP.

  • Page 39: Transmit Rate

    Transmit Rate Transmit Rate The transmit rate identifies the preferred data transmission speed of the AP. The actual data transmission speed is subject to the type of PC Cards at both ends of the wireless link and the communications quality of the link. Transmissions at faster rates allow for higher data throughput and quicker network response times.

  • Page 40: Auto Rate

    Transmit Rate Auto Rate With the auto rate option, the PC Card in a client or AP automatically switches to the next lower rate when data transmissions fail more than once. Shortly after completing the transmission, the PC Card returns to transmitting data at the higher rate. In most environments, Auto Rate allows the PC Card to use a higher rate for better data throughput, yet the PC Card can still use the more reliable slower rate when transmissions fail.

  • Page 41: Communications Quality

    The RoamAbout Client Utility allows you to monitor the SNR, signal level, and noise level at the client. The Client Utility is provided on the RoamAbout 802.11 PC Card Drivers and Utilities CD-ROM, or you can download it from the RoamAbout Wireless web site.

  • Page 42: Data Throughput Efficiency

    Data Throughput Efficiency Data Throughput Efficiency Data throughput efficiency is measured in transmissions sent, lost, or received. When a data transmission fails, the wireless device automatically retransmits the data. It is normal in many environments for a transmission to fail occasionally. Data is not lost since the wireless device automatically retransmits the data frames.

  • Page 43: Rts/Cts Protocol

    RTS/CTS Protocol Each device in a wireless network can sense transmissions from other devices in its network that use the same frequency. To avoid collisions and lost data, a device only transmits when it senses that no other device is transmitting. This behavior is referred to as the Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) protocol.

  • Page 44: Hidden Station

    RTS/CTS Protocol Hidden Station A wireless device is a hidden station when its transmissions cannot be sensed by another wireless device in the same network. Therefore, multiple devices could transmit at the same time. This problem can occur with clients located at opposite ends of an AP coverage area. Figure 2-2 illustrates a hidden station example.

  • Page 45: 802.11 Power Management

    With slower response times, the client may spend more time in operational mode resulting in less effective power management. In such cases, disabling power management on the client might result in better throughput performance. The RoamAbout PC Card 802.11 power management is separate from any power management function on your computer. RoamAbout AP The RoamAbout AP automatically supports 802.11 power management.

  • Page 46: Security

    Security Security The following lists the types of security in a RoamAbout wireless environment: Network operating system security RoamAbout AP Secure Access Wired Equivalent Privacy (WEP) Encryption Simple Network Management Protocol (SNMP) community names SNMPv3 (RoamAbout R2 only) Device Authentication, which requires a RADIUS (Remote Authentication Dial-In User Service) server.

  • Page 47: Wired Equivalent Privacy (Wep) Encryption

    Wired Equivalent Privacy (WEP) Encryption The WEP feature encrypts all data transmitted within the wireless network. The encryption uses the RC4 algorithm as defined in the IEEE 802.11 Wired Equivalent Privacy standard. NOTE: Broadcast and multicast messages are not encrypted.

  • Page 48: Authentication

    Security Authentication The RoamAbout AP supports authentication of wireless workgroup clients. An AP can authenticate clients based on: MAC address 802.1X Both MAC address and 802.1X (Hybrid authentication) When using any of these types of authentication, you must configure the AP as a RADIUS client.
  • Page 49 802.1X Authentication IEEE 802.1X authentication allows logins based on user name, password, user certificates, and other methods that may be mutually supported by the authentication server and the clients. Only clients that support 802.1X can participate in a wireless network that uses this type of authentication.

  • Page 50: 802.1X Rapid Rekeying

    Security 802.1X Rapid Rekeying Rapid Rekeying, also known as Key Tumbling, provides automatic IEEE 802.11 WEP encryption key generation and frequent redistribution of WEP keys. The following information applies to using Rapid Rekeying: Rapid Rekeying requires the use of 802.1X authentication. Unauthenticated clients and MAC address authentication clients cannot receive updated WEP keys, and would soon lose connectivity to the LAN.
  • Page 51 2. The key period expires. The AP creates two new random keys and loads them into the inactive authenticator key indexes (Keys 3 and 4 in this example). The keys are not yet used for transmission or reception. Key # Encryption Key1 aaaaaaaaaaaaaa...
  • Page 52 Security 4. Once the AP transmits the new keys to all clients in the supplicant list, it begins using the new TX key (Key4). At this time all supplicants are using Key3 as their TX key. Key # Encryption Key1 aaaaaaaaaaaaaa Key2 bbbbbbbbbbbbb...

  • Page 53: Snmp Community Names

    SNMP Community Names The SNMP community name allows management tools using SNMP to display or modify AP parameters remotely. The RoamAbout R2 supports SNMPv3. To access the RoamAbout R2 parameters via SNMP, the management tool must know the Authentication Password and Privacy Password.

  • Page 54: Network Protocols

    Network Protocols Network Protocols When you install a RoamAbout PC Card in a computer using a Windows operating system, you may need to install and configure a set of networking protocols. The type of protocols needed depends on the network operating system used within your LAN environment. The most common protocols are: IPX/SPX compatible protocols if your networking environment is using the Novell NetWare network operating system.

  • Page 55: Message Types

    Message Types When a device in the wireless network transmits data, it can take one of these forms: Broadcast: A data message transmitted by one device to all devices in the network. Multicast: A data message transmitted by one device to multiple devices in the network.

  • Page 56: Spanning Tree Protocol

    Spanning Tree Protocol Spanning Tree Protocol The RoamAbout AP uses 802.1d Spanning Tree Protocol to prevent network loops. A loop occurs when there are alternate routes between networks, as described in Network Loops” on page traffic and degrade network performance. In normal LAN-to-LAN operation, keep Spanning Tree ENABLED.

  • Page 57: Vlans

    VLANs A VLAN is a logical partition of one or more physical networks. A single VLAN can span multiple LANs, and multiple VLANs can reside within a single LAN. One major benefit of a VLAN is that traffic is restricted to a subset of the physical LAN or LANs. Multicasts are only sent to the VLAN member ports.

  • Page 58: Network Configurations

    VLANs Network Configurations Both the RoamAbout Access Point 2000 and the R2 can be used as a wireless bridge to an existing VLAN. For example, two APs can connect VLANs residing in different buildings, as illustrated in Figure supports VLAN IDs. Switch 1 connects to VLANs Red, Blue, and Green, but only forwards data from VLANs Red and Green.

  • Page 59: Static And Dynamic Vlans

    VLANs Ingress Filtering is always enabled on the RoamAbout R2. That is, the R2 does NOT forward data from a VLAN defined on other ports if it is received on a port that is not configured for that VLAN. In Figure 2-5, should R2(A) be configured incorrectly and forward VLAN Green data from Switch 2 to R2(E), R2 (E) would not forward the data.

  • Page 60: Roamabout Snmp Management

    Network Management Station needs to have the AP read/write community name. The default community name is public. Refer to the Release Notes for a complete list of supported MIB objects. 2-26 • IEEE 802.11 MIB • IEEE 8021-PAE-MIB (Port Access Entity) • RFC1157 (SNMP Management) •...

  • Page 61: Roamabout R2

    SNMPv3, use the RoamAbout R2 console port to configure the Communities Views for SNMPv1 and SNMPv2c access. The RoamAbout R2 supports the following MIBs: • Enterasys-802.11 Extensions MIB • Enterasys Extended Switch MIB • Enterasys Encrypted 802.1X Rapid Rekeying MIB •...

  • Page 63: Designing And Implementing A Wireless Network

    The first step in designing a wireless network is to determine which network configuration best fits your needs. The wireless network configurations are discussed in you have chosen a configuration, this chapter lists the various site requirements necessary for each type of network. Some of the features listed are not available with earlier versions of the AP and the PC Card driver.

  • Page 64: Infrastructure Network

    Infrastructure Network Infrastructure Network To plan a wireless infrastructure network, determine the following: Coverage area - the area where the clients are located. If the clients are mobile, this is the area where the clients can connect to the network. Supported users - the number of clients that you expect to support.

  • Page 65: Determining The Coverage Area And Supported Users

    Determining the Coverage Area and Supported Users Coverage area is determined by a number of factors, including physical obstructions and noise levels as shown in Figure The following is an example of the coverage area in a semi-open environment, which is defined as work space divided by shoulder-height, hollow wall elements.

  • Page 66: Selecting The Location For A Single Ap

    Infrastructure Network Noise levels in the radio frequencies can reduce the coverage area. Such noise can be generated by microwave ovens and elevator motors. Increasing the AP Density will also reduce the coverage area of a single AP. A RoamAbout Access Point can support up to 250 users within its coverage area. The RoamAbout R2 supports up to 250 users per slot.

  • Page 67: Selecting The Locations For Multiple Aps

    Selecting the Locations for Multiple APs Consider the following: Each coverage area must overlap another coverage area to allow roaming for clients. The amount of overlap depends on number of users in a coverage area and utilization of the network. If you expect that one coverage area has more users or higher network utilization than the other coverage areas, increase the overlap of the adjacent coverage areas by moving the APs closer together (see...

  • Page 68: Roamabout R2 Mezzanine Special Considerations

    Infrastructure Network RoamAbout R2 Mezzanine Special Considerations The following information pertains to the RoamAbout R2 with the Mezzanine option installed: Slot 2 does not support LAN-to-LAN Multipoint. If two 802.11b PC Cards are installed in the RoamAbout R2, one of the PC Cards must be connected to the Range Extender Antenna to prevent radio interference between the two cards.

  • Page 69: Lan-To-Lan Network Configuration

    LAN-to-LAN Network Configuration There are two types of LAN-to-LAN configurations. The LAN-to-LAN Endpoint Bridge mode is used in a Point-to-Point configuration to connect two separate wired LANs. The LAN-to-LAN Multipoint Bridge mode is used in a Point-to-Multipoint configuration to connect multiple wired LANs. Typically, the LANs are in different buildings and the configuration requires the RoamAbout outdoor antenna kit.

  • Page 70: Ad-Hoc Network

    Ad-Hoc Network Ad-Hoc Network The only requirement for an ad-hoc network is the ability to communicate with one or more other wireless users. To do this: All PC Cards must use the same channel. Default channels are listed in page A-3.

  • Page 71: Wireless Network Hardware Installation Overview

    Client Utility” on page 6. Configure the wireless clients using the procedures described in the RoamAbout 802.11 PC Card Drivers and Utilities Setup and Installation Guide. LAN-to-LAN Configuration The following is an overview of the steps to install the APs in a LAN-to-LAN configuration.

  • Page 72: Ad-Hoc Network

    Refer to the RoamAbout PC Card documentation. 2. If installing the RoamAbout Client Utility (recommended), see the Client Utility” on page 3. Configure the wireless clients, as described in the RoamAbout 802.11 PC Card Drivers and Utilities Setup and Installation Guide. 3-10 4-7.

  • Page 73: Wireless Network Tools

    This chapter describes the configuration tools. You can configure the AP using one or more of these tools: RoamAbout AP Manager RoamAbout console port Telnet (RoamAbout R2 only) Web Management (RoamAbout R2 only) Network Management Station (NMS) To configure the AP for the first time, you need to use the RoamAbout AP Manager or the console port.

  • Page 74: Roamabout Ap Manager

    Integrated with a BootP/TFTP application for simple AP firmware upgrades, also called flash upgrades. Support for 802.11 radio technology. Ability to manage current and previous releases of the AP firmware. The AP Manager only allows access to those features supported by the selected AP.

  • Page 75: Installing The Roamabout Ap Manager

    RoamAbout AP Manager Installing the RoamAbout AP Manager The AP Manager supports Windows 95, Windows 98, Windows 2000, Windows Me, Windows NT (V4.0 or later), and Windows XP. The AP Manager can manage APs from a wireless computer. However, the AP Manager needs to be on a computer connected to the same wired LAN as the AP to assign an IP address or upgrade the AP firmware.

  • Page 76: Using The Ap Manager

    APs in a LAN-to-LAN configuration. APs in these configurations are managed differently. If you have earlier releases of the RoamAbout AP, you can group non-802.11 compliant APs together, separate from the 802.11 APs. The AP Manager saves each group in a configuration file (*.CFG). When you create a...

  • Page 77: Other Snmp Management Tools

    Other SNMP Management Tools The AP supports the Simple Network Management Protocol (SNMP) through any standard Network Management Station (NMS) that supports SNMP. The SNMP management capability enables you to manage standard SNMP MIB characteristics, such as protocol filtering and address filtering. To manage the AP with an NMS, you must first use the console port or AP Manager to configure the AP with a valid IP address.

  • Page 78: Telnet

    Telnet Telnet You can manage the RoamAbout R2 through Telnet. However, you must first assign the R2 an IP address. Perform the following steps to access the R2 through Telnet: 1. Open a DOS Prompt. 2. Telnet to the IP Address that you assigned to the RoamAbout R2. For example: telnet 10.0.0.00 You are prompted for a username and password.

  • Page 79: Roamabout Client Utility

    RoamAbout Client Utility is included on the RoamAbout 802.11 PC Card Drivers and Utilities CD-ROM, or you can download it from the RoamAbout Wireless web site. Refer to the RoamAbout 802.11 PC Card Drivers and Utilities Setup and Installation Guide for setup and installation information.

  • Page 81: Configuring The Wireless Network

    Chapter To install the drivers and utilities on the clients, refer to the RoamAbout 802.11 PC Card Drivers and Utilities Setup and Installation Guide. If you are configuring a wireless infrastructure network, configure the APs first. Many of the wireless client parameters are based on the AP settings.
  • Page 82 In This Chapter Topic Setting Spanning Tree Filtering Traffic by Protocols Filtering Traffic by Addresses Checking the Configuration on Multiple APs Resetting the RoamAbout AP Using the RoamAbout R2 Web Management Configuring Clients Page 5-43 5-44 5-46 5-47 5-48 5-49 5-50...

  • Page 83: Configuring Aps In An Infrastructure Network

    Configuring APs in an Infrastructure Network After installing the AP, you can configure its network and wireless parameters using the AP Manager, the console port, or the R2 Web Management. To configure the RoamAbout R2 for management by an NMS using SNMPv2 or SNMPv1, see SNMPv1 or SNMPv2”...
  • Page 84 AP Manager. DTIM: In nearly all environments, you should not change the default DTIM of 1. See “802.11 Power Management” on page Secure Access: Enable to prevent clients without the correct wireless network name from connecting to this AP.

  • Page 85: Using The Ap Manager

    Using the AP Manager Use the Help button in the AP Manager for a description of any field. 1. If you are currently managing APs with the AP Manager, determine if the new AP belongs to an existing group. Refer to description of configuration groups.

  • Page 86: Using The Roamabout R2 Console Port

    Configuring APs in an Infrastructure Network Using the RoamAbout R2 Console Port To use the console port, follow the instructions in Port” in Appendix 1. Choose Network Configuration from the Main Menu and enter the following parameters: IP address: Enter the IP address you wish to assign to the AP. Subnet mask: Enter the subnet mask you wish to assign to the AP.

  • Page 87: Using The Access Point 2000 Console Port

    Using the Access Point 2000 Console Port To use the console port, follow the instructions in Port” in Appendix B. Use Help in the console screens for a description of any field. 1. Choose Set IP Address from the Installation Menu. 2.

  • Page 88: Configuring Aps In A Point-To-Point Network

    Configuring APs in a Point-to-Point Network Configuring APs in a Point-to-Point Network You can configure two APs to communicate with each other in a LAN-to-LAN Point-to-Point configuration using the AP Manager or the console port as described in the following sections. To configure the RoamAbout R2 for management by an NMS using SNMPv2 or SNMPv1, see 5-29.

  • Page 89: Wireless Parameters Used In A Point-To-Point Network

    Wireless Parameters Used in a Point-to-Point Network The following AP parameters are not used in this configuration: • Wireless Network Name • Secure Access • IntraBSS Relay The following describes the settings used in a point-to-point network: Slot 1/Slot 2: (RoamAbout R2 only): Select the slot to be configured. Channel: Both APs must use the same channel.

  • Page 90: Using The Ap Manager

    Configuring APs in a Point-to-Point Network Using the AP Manager Use the Help button in the AP Manager for a description of any field. 1. If you are currently managing APs with the AP Manager, determine if the new AP belongs to an existing group.

  • Page 91: Using The Roamabout R2 Console Port

    Using the RoamAbout R2 Console Port To use the console port, follow the instructions in Port” in Appendix B. Use Help in the console screens for a description of any field. 1. Choose Network Configuration from the Main Menu and enter the following parameters: IP address: Enter the IP address you wish to assign to the AP.

  • Page 92: Using The Access Point 2000 Console Port

    Configuring APs in a Point-to-Point Network Using the Access Point 2000 Console Port To use the console port, follow the instructions in Port” in Appendix 1. Choose Set IP Address from the Installation Menu. 2. Enter the IP address, subnet mask, and default gateway. 3.

  • Page 93: Configuring The Ap For Point-To-Multipoint

    Configuring the AP for Point-to-Multipoint You can configure up to seven APs in a point-to-multipoint configuration. At least one AP must be configured as a Central AP. The other APs are configured as endpoint APs, as described in “Point-to-Multipoint” on page management by an NMS using SNMPv2 or SNMPv1, see SNMPv1 or SNMPv2”...

  • Page 94: Wireless Parameters Used In A Point-To-Multipoint Network

    Configuring the AP for Point-to-Multipoint Wireless Parameters Used in a Point-to-Multipoint Network The following AP parameters are not used in this configuration: • Wireless Network Name • Secure Access • IntraBSS Relay The following describes the settings used in a point-to-multipoint network: Slot 1/Slot 2 (RoamAbout R2 only): Select the slot to be configured.

  • Page 95: Using The Ap Manager

    Using the AP Manager Use the Help button in the AP Manager for a description of any field. 1. Determine which AP is the Central AP, as described in page 1-10. 2. If you are currently managing APs with the AP Manager, determine if the new AP belongs to an existing group.

  • Page 96: Using The Roamabout R2 Console Port

    Configuring the AP for Point-to-Multipoint Using the RoamAbout R2 Console Port To use the console port, follow the instructions in Port” in Appendix 1. Choose Network Configuration from the Main Menu and enter the following: IP address: Enter the IP address you wish to assign to the AP. Subnet mask: Enter the subnet mask you wish to assign to the AP.

  • Page 97: Using The Access Point 2000 Console Port

    Using the Access Point 2000 Console Port To use the console port, follow the instructions in Port” in Appendix B. Use Help in the console screens for a description of any field. 1. Choose Set IP Address from the Installation Menu. 2.

  • Page 98: Viewing Current Ap Settings

    Viewing Current AP Settings Viewing Current AP Settings You can view the current settings before you modify the RoamAbout AP parameters. Using the AP Manager Using the AP Manager, select the AP from the Managed List field and click the various buttons, such as Wireless Parameters, Network Parameters, and Hardware.

  • Page 99: Modifying The Ip Address

    Modifying the IP Address The AP can obtain an IP address using these methods: BootP (default): The AP obtains its IP Address from a BootP server when it reboots. A BootP server must be configured in advance to respond with the desired IP address. DHCP: The AP obtains its IP address from a DHCP server.

  • Page 100: Using The Roamabout R2 Console Port

    Modifying the IP Address To manually change the IP address of an Access Point or Access Point 2000, perform the following. You will need the AP’s wired MAC address and an unused IP address. 1. Select the AP in the managed list. 2.

  • Page 101: Using The Access Point 2000 Console Port

    Using the Access Point 2000 Console Port To manually enter an IP address, and disable both BOOTP and DHCP, go to Set IP Address in the Main Menu and enter an IP address. A reset to the AP is not needed. To change how the IP address is obtained, perform the following: 1.

  • Page 102: Modifying Wireless Parameters

    PC card. The transmit rate can also be changed to accommodate the addition or reduction of noise in the coverage area. For more information, see NOTE: Enterasys Networks recommends that you use an xx Mbit/s Auto rate NOTES setting.

  • Page 103: Using Ap Manager

    IntraBSS Relay: When enabled, it allows wireless users associated with an AP to see and communicate between each other. This is accomplished by taking a multicast packet from one wireless user and rebroadcasting it so that all wireless users see it. When disabled, it prevents communication between users associated with an AP.

  • Page 104: Configuring For Security

    Configuring for Security Configuring for Security To have the most amount of security in your wireless infrastructure network: Set up your networking protocols to require user names and passwords. Refer to the documentation that came with the networking software or operating system. Create a unique Wireless Network Name and enable Secure Access at the APs.

  • Page 105: Setting Encryption

    Setting Encryption Before configuring encryption on the AP, create the encryption keys as follows: 1. Create up to four keys, where the keys can be: — 5 printable characters or 10 hexadecimal digits if the RoamAbout PC Card supports 40-bit WEP encryption. —...
  • Page 106 Configuring for Security Using the RoamAbout R2 Console Port To configure encryption using the RoamAbout R2 console port, perform the following: 1. Choose Wireless Configuration from the Main Menu. 2. Choose Encryption Configuration. Radio Slot: 1 or 2 Encryption State: Enable Keys: Enter up to 4 encryption keys.
  • Page 107 Using the Access Point 2000 Console Port To configure encryption using the console port, perform the following: 1. Choose Module-Specific Options from the RoamAbout AP Installation Menu. 2. Choose Set Encryption Configuration. Set Encryption Key: Use these menu options to enter the keys. Set Transmit Key ID: Choose one key to be the transmit key.

  • Page 108: Configuring The Console Port For Security

    Configuring the Console Port for Security Configuring the Console Port for Security For the AP 2000, the AP Manager and any other SNMP Manager must have the correct read/write community name associated with the AP; otherwise, the tool cannot make any changes to the AP.

  • Page 109: Configuring The R2 For Snmpv1 Or Snmpv2

    Configuring the R2 for SNMPv1 or SNMPv2 The RoamAbout R2 supports SNMPv3. To support management tools using SNMPv2 or SNMPv1, the R2 provides four community names that allow SNMPv1 and SNMPv2c read-only and read-write access. The names are disabled by default with the exception of Community Name #1, which is set to public.

  • Page 110: Configuring The Ap For Authentication

    Configuring the AP for Authentication Configuring the AP for Authentication Authentication uses a RADIUS server to authenticate wireless clients in a wireless infrastructure network. Refer to of authentication. The following lists the basic tasks to configure for authentication: Configuring a RADIUS server (not described in this document) Configuring the AP as a RADIUS client and choosing the type of authentication The AP 2000 has the option of using the default RADIUS Management Authenticator or creating a custom authenticator.
  • Page 111 4. Enter the Custom Authenticator. The format is 16 printable ASCII characters, or 32 hexadecimal digits preceded by 0x. 5. Click OK. After you enter a custom authenticator, you are prompted to enter a password. Once you set the password, only those with the password can access the custom RADIUS authenticator.

  • Page 112: Configuring The Ap For Authentication

    Configuring the AP for Authentication Configuring the AP for Authentication Before you can configure the AP as a RADIUS client, you must choose the type of authentication to use: MAC address, 802.1X, or both. Also, you need to have the following RADIUS server information available: Primary Server IP Address: IP Address of the primary RADIUS authentication server.
  • Page 113 Time Between Reauthentications: Time, in minutes, between each reauthentication when Reauthentication is enabled. The default is 60 minutes. Hold Period After Failed Login: Time, in seconds, after a login failure before the device can restart the authentication procedure. The default is 60 seconds. A login failure is when a device tries to log in and fails authentication twice consecutively.
  • Page 114 Configuring the AP for Authentication Using the RoamAbout R2 Console Port 1. Choose Security and Policy Configuration from the Main Menu. 2. Choose RADIUS Client Configuration. RADIUS: Enable. The RADIUS Client Parameters screen appears. 3. Enter the RADIUS client information. 4.
  • Page 115 Using the Access Point 2000 Console Port 1. Choose Module-Specific Options from the RoamAbout AP Installation Menu. 2. Choose Authentication Options. 3. Choose Configure RADIUS Client. 4. Choose Enable/Disable RADIUS Authentication. Enable this setting. 5. In the Configure RADIUS Client Parameters menu, choose Enter All RADIUS Client Parameters.

  • Page 116: Configuring For Rapid Rekeying

    Configuring for Rapid Rekeying Configuring for Rapid Rekeying To use Rapid Rekeying, you must set up the AP for 802.1X authentication, as described in Configuring the AP for Authentication on page configured on the AP and the wireless clients. The following lists the Rapid Rekeying parameters: Time Between Key Changes (or Rekeying Period): This is the interval, in minutes, that the AP waits before starting a new key sequence.

  • Page 117: Using The Access Point 2000 Console Port

    Using the Access Point 2000 Console Port To set up Rapid Rekeying using the console port, perform the following steps: 1. Choose Module-Specific Options from the Installation Menu. 2. Choose Authentication Options. 3. Choose Configure Wireless Authentication Type. 4. Choose 802.1X Authentication with Rapid Rekeying. 5.

  • Page 118: Set Up Rapid Rekeying On The Clients

    1. Open the Control Panel by selecting Start Programs Control Panel. 2. In the Control Panel, open Network Connections then open the Wireless Network Connection (RoamAbout 802.11 DS). 3. In the Wireless Network Connection Status window, click on the Properties button.
  • Page 119 6. In the Wireless Network Properties window (shown below), select the following: a) Check the box marked Data encryption (WEP enabled). b) Check the box marked The Key is provided for me automatically. c) Un-check any other checked boxes. d) Click OK to apply the changes. 7.

  • Page 120: Configuring For Vlans

    Configuring for VLANs Configuring for VLANs The RoamAbout AP supports the forwarding of tagged VLAN data. The RoamAbout R2 can be configured to forward VLAN data to specific endpoints. The Access Point 2000 can only be configured to forward or not forward VLAN data. When forwarding VLAN data, the Access Point 2000 forwards to all endpoints.

  • Page 121: Using The Ap Manager

    Ports are displayed according to the Remote Wireless MAC addresses you set up for the RoamAbout R2 configuration. In the LAN-to-LAN Multipoint configuration, the ports are assigned according to the wireless MAC Addresses you entered in the Multipoint Properties dialog box. The ports are defined as follows: Port 1: The 10/100 Ethernet Port.

  • Page 122: Using The Roamabout R2 Web Management

    Configuring for VLANs To enable or disable GVRP (RoamAbout R2 only): 1. Click the VLAN Parameters button. 2. Enable or disable GVRP. 3. Click OK. To enable or disable VLAN compatibility on the AP 2000: 1. Click the VLAN Parameters button. 2.

  • Page 123: Setting Spanning Tree

    Setting Spanning Tree It is important to avoid Point-to-Multipoint configurations that will cause bridge loops. A bridge loop occurs when two parallel network paths are created between any two LANs, causing packets to be continuously regenerated through both parallel paths. This situation eventually renders the network unusable due to the excessive traffic that is being generated by the loop.

  • Page 124: Filtering Traffic By Protocols

    Filtering Traffic by Protocols Filtering Traffic by Protocols You can configure the AP to NOT forward specific protocol traffic to the wireless network. This could reduce unnecessary traffic and increase the network response time. However, filtering the wrong protocols can negatively affect the operation of the network. When solving network problems, you should clear all filters.

  • Page 125: Protocol Description

    Table 5-1: Protocols to Filter(Cont’d) Protocol DECnet Does not forward DECnet packets carried in Ethernet V2 frames or in IEEE 802.3 frames with LLC/SNAP headers. DECnet packets are used primarily in DEC VMS and related networking. If you do not plan to have DECnet clients, you should filter all DECnet traffic.

  • Page 126: Filtering Traffic By Addresses

    Filtering Traffic by Addresses Filtering Traffic by Addresses You can filter traffic to the network using Address Denied, or you can restrict access to the network using Addresses Allowed. The device can be on either side of the AP (wired or wireless).

  • Page 127: Checking The Configuration On Multiple Aps

    Checking the Configuration on Multiple APs The AP Manager provides integrity tests that check for consistent settings across all the APs in a single group. Use the integrity tests to make sure that the APs in a single wireless network are configured correctly. To access the tests, click Integrity on the AP Manager menu bar.

  • Page 128: Resetting The Roamabout Ap

    Resetting the RoamAbout AP Resetting the RoamAbout AP This section describes how to reset the AP. Reset with Current Settings If you change any wireless configuration parameter, such as the wireless network name or channel, you must select this option to reset the AP to implement your changes. —...

  • Page 129: Using The Roamabout R2 Web Management

    Using the RoamAbout R2 Web Management For the RoamAbout R2 web management, AP Manager or any Network Management Station to remotely manage the AP, the AP must have a valid IP address and subnet mask. The RoamAbout R2 web management runs on the following browsers: Netscape Communicator V4.5, V4.6, V4.7, V6.0 (and later) Microsoft Internet Explorer V4.0 and V5.0 (and later) To manage the RoamAbout R2 using web management, perform the following steps:...

  • Page 130: Configuring Clients

    Configuring Clients Configuring Clients To configure the clients, refer to the RoamAbout 802.11 PC Card Drivers and Utilities Setup and Installation Guide and the client online help. Check the enterasys.com/wireless web site frequently for client upgrades and documentation revisions. 5-50...

  • Page 131: Maintaining The Wireless Network

    Maintaining the Wireless Network To maintain the wireless network, you should regularly check the wireless coverage area, communications quality, and data throughput efficiency. As your environment changes, you may need to adjust wireless parameters or move APs to account for new obstructions or new sources of radio interference. You may also need to add APs should the number of users increase.

  • Page 132: Testing Radio Communications Quality

    Testing Radio Communications Quality Testing Radio Communications Quality You can test the radio communications quality from the AP to another wireless device using the AP Manager, or from a client to another wireless device using the RoamAbout Client Utility. Using the AP Manager The RoamAbout AP Manager provides a Link Test tool that tests the signal quality from the AP to a client or another AP.

  • Page 133: Using The Roamabout Client Utility

    Using the RoamAbout Client Utility This procedure requires the RoamAbout Client Utility on a RoamAbout client. The RoamAbout Client Utility Link Test window allows you to investigate the specific link between the RoamAbout client and its test partner. Click on the Help button in any window for more information.
  • Page 134 Testing Radio Communications Quality A low signal level indicates that the client and the test partner may be too far apart or there may be obstructions between them. If possible, remove the obstructions, move the devices closer, or use the optional Range Extender antenna described in Extender Antenna”...

  • Page 135: Optimizing Roamabout Ap Placement

    Optimizing RoamAbout AP Placement If one or more clients are transmitting simultaneously with the AP in an infrastructure network, you may need to lower the RTS Threshold on the AP as described in the “RTS/ CTS Protocol” on page 2-9. If the concentration of users per AP is high, you may need to place the APs closer together to distribute the load, or add APs to the wireless network.

  • Page 136: Using Ap Manager

    Optimizing RoamAbout AP Placement To open the Site Monitor window, perform the following steps: 1. To start the Client Utility, perform the following: — Click on the Client Utility icon Taskbar. — From the Windows Taskbar, click Start, then select Programs RoamAbout RoamAbout Client Utility.

  • Page 137: Optimizing Roamabout Outdoor Antenna Placement

    5. Check the signal level and noise level if the SNR is low between the AP and the wireless device. If the signal level is low, the devices may be too far apart or there are obstructions between them. If the noise level is high, determine the source of interference by selecting other clients. If available, use the RoamAbout Client Utility Site Monitor tool at a mobile client to better determine the location of the interference.

  • Page 138: Logging Measurement Data

    Logging Measurement Data Logging Measurement Data You can save the results of your RoamAbout Client Utility Link Test or Site Monitor session in a log file. To enable logging, set the Client Utility to enhanced mode by clicking the Options button in the Status/Functions window. For information about a Client Utility window, press <F1>...

  • Page 139: Checking The Client Roamabout Pc Card

    Client Utility displays a warning that allows you to either abort or proceed with the Card Test. Click on the Generate Report button to create a log file of the wireless network card components and system settings of your computer. If you need to contact RoamAbout technical support, the card test results may help the support representative determine the cause of a malfunctioning device.

  • Page 140: Monitoring The Ap Using Rmon

    Monitoring the AP Using RMON Monitoring the AP Using RMON The AP supports four of the nine Remote Network Monitoring MIB (RMON) groups: Statistics - Contains statistics measured by the probe for the wired LAN and the wireless LAN interfaces. History - Records periodic statistical samples from a network and stores them for later retrieval.

  • Page 141: Monitoring Radius Client Operations

    Monitoring RADIUS Client Operations Using the console port, you can monitor the RADIUS client statistics for the primary and secondary RADIUS servers. Using the RoamAbout R2 Console Port To view the RADIUS client statistics, choose RADIUS Client Statistics from the Security and Policy Configuration menu.
  • Page 142 Monitoring RADIUS Client Operations Table 6-1: RADIUS Client Statistics Menu - Field Descriptions Field Description Invalid Server Number of RADIUS Access-Response packets received from unknown Addresses addresses. Round Trip Time interval (in hundredths of seconds) between the most recent Access-Reply/ Time Access-Challenge and the Access-Request that matched it from the RADIUS authentication server.

  • Page 143: Checking Roamabout Product Version Numbers

    Checking RoamAbout Product Version Numbers Using AP Manager To check the RoamAbout AP firmware version, run the RoamAbout AP Manager, choose the Hardware button and check the software version (SW=Vx.x). Refer to the AP Manager on-line help for additional information. Using the Access Point 2000 Console Port To check the RoamAbout AP firmware version using the console port, select Show Current Settings from the Installation Menu.

  • Page 144: Upgrading The Roamabout Ap Firmware

    Upgrading the RoamAbout AP Firmware Upgrading the RoamAbout AP Firmware The AP firmware, also called embedded software, can be easily upgraded. Regularly check the RoamAbout web site for the latest information concerning RoamAbout updates. To upgrade the AP, copy the image file from the web site to the same directory as the AP Manager or BootP/TFTP server.

  • Page 145: Using The Roamabout R2 Console Port

    4. Choose BootP Server if a BootP server has been configured with the correct file. Choose TFTP Server if you wish to upgrade the AP with a specific image. If choosing TFTP Server, you will be prompted for the server IP address and image file name. 5.

  • Page 146: Replacing The Pc Card In An Ap

    Replacing the PC Card in an AP Replacing the PC Card in an AP You may need to replace a defective PC Card or upgrade the PC Card in an AP. If upgrading the AP from a 2 Mbit/s PC Card to an 11 Mbit/s PC Card, make sure that the AP firmware version is V5.0 or greater, as described in the Version Numbers”...

  • Page 147: Problem Solving

    This chapter contains problem solving information for the RoamAbout wireless network. If the problem appears to be with an AP or a specific client, check the LEDs first. The AP LEDs are described in the next section. The client LEDs are described on In This Chapter Information in this chapter is presented as follows: Topic...

  • Page 148: Using The Ap Leds To Determine The Problem

    Using the AP LEDs to Determine the Problem Using the AP LEDs to Determine the Problem The AP LEDs show status and help diagnose problems. The following sections describe the LEDs on the AP 2000 and the original release of the AP. Figure 7-1 shows the RoamAbout APs.
  • Page 149 Table 7-1: RoamAbout R2 LED Descriptions Name Description System Status Lights when the RoamAbout R2 passes self-test. If the RoamAbout R2 fails the test, the LED blinks at a steady rate. Power Lights when the power is on. Wired Forwarding Lights when the RoamAbout R2 is forwarding packets to the wired Ethernet port.
  • Page 150 Using the AP LEDs to Determine the Problem Table 7-2: RoamAbout R2 LED Patterns Wired Wireless Wireless Forwarding = On, = Off, Wired Forwarding = Constant blinking, = Random blinking, System Meaning of LED Pattern No power. Check the power connections. Diagnostics failed.

  • Page 151: Ap 2000 Leds

    AP 2000 LEDs Table 7-3 describes the function of each LED. Error conditions cause the LEDs to turn on, off, or blink in a pattern. Table 7-4 possible corrective actions. upgrade. If you suspect an AP failure, run the self-test by removing then reapplying AC power.
  • Page 152 Using the AP LEDs to Determine the Problem Table 7-4: RoamAbout AP 2000 LED Patterns Wired Wireless = On, = Off, Bridge Saturated State = Constant blinking, = Random blinking, Power/ Meaning of System LED Pattern Status No power. Check the power connections.
  • Page 153 Table 7-5: Network Loading LED Patterns Wired Wireless = On, = Off, Using the AP LEDs to Determine the Problem AP Saturated Bridge State = Constant blinking, = Random blinking, Power/ Meaning System of LED Pattern Downline loading image from load host. TFTP file not found or other TFTP error.

  • Page 154: Ap (Classic) Leds

    Using the AP LEDs to Determine the Problem AP (Classic) LEDs Table 7-6 describes the LED functions. possible corrective actions. Table 7-6: AP (Classic) LEDS Name Description Power OK Lights (green) when the AP has power. Module OK Lights (green) when the AP passes its power-up self-test. The LED is off if the AP fails the test.
  • Page 155 Table 7-7: AP (Classic) LED Patterns Power Module Wired = On, = Off, = Constant blinking, Using the AP LEDs to Determine the Problem Bridge Saturated Wireless State = Random blinking, Card Meaning of LED Present Pattern Ethernet connection is not working or there is a hardware failure.
  • Page 156 Using the AP LEDs to Determine the Problem Table 7-8: Network Loading/Upline Dumping LED Patterns Power Module Wired = On, = Off, = Constant blinking, 7-10 Bridge Saturated Wireless State = Random blinking, Card Meaning of LED Present Pattern Waiting for downline load from load host Downline loading image from load host...

  • Page 157: Showing Counters

    Showing Counters You can display the values of all the counters maintained by the AP. This information can help you monitor the performance of your wireless network or better understand a problem. Typically, this information is used by RoamAbout support personnel to help you diagnose a problem.
  • Page 158 Showing Counters Table 7-9: RoamAbout AP (Classic and 2000) Counters Counter Description Individually addressed Total number of bytes transmitted by the interface as part of unicast messages. bytes sent Normal behavior for this counter shows a relatively high value that is increasing rapidly.
  • Page 159 Table 7-9: RoamAbout AP (Classic and 2000) Counters (Cont’d) Counter Description Single collision Number of successfully transmitted frames on the selected interface for which transmission is inhibited by exactly one collision. Frames counted in this counter are not counted by the MultipleCollisionFrames counter. Multiple collisions Number of successfully transmitted frames on the selected interface for which transmission is inhibited by more than one collision.
  • Page 160 Number of times the PC Card deferred a transmission to avoid collisions with messages transmitted by other devices. Deferral is normal behavior for 802.11 devices. A relatively high value for this counter identifies a wireless network with lots of activity.
  • Page 161 Receive FCS errors Number of received messages or message parts that contained an erroneous (RxFCSErrors) value and had to be deleted. In the IEEE 802.11 protocol, such messages are recovered by the ACK (Acknowledgment) protocol and then retransmitted by the sending device.
  • Page 162 Showing Counters Table 7-10: RoamAbout AP Classic and 2000) PC Card Counters (Cont’d) Counter Wrong station address on transmit (TxDiscardsWrongSA) Receive WEP errors (RxDiscardsWEP Undecryptable) Receive message in message fragments (RxMessageInMsg Fragments) Receive message in bad msg fragments (RxMessage InBadMsgFragments) Receive WEP ICV errors Receive WEP excluded 7-16...
  • Page 163 Table 7-11: RoamAbout R2 Counters Counter Wired Description DropEvents Total number of events in which packets were dropped by the probe due to lack of resources. This number is not necessarily the number of packets dropped; it is just the number of times this condition has been detected.

  • Page 164: Displaying Error Logs

    Displaying Error Logs Table 7-11: RoamAbout R2 Counters (Cont’d) Counter Wired Description Pkts 128 to Total number of packets (including bad packets) received that were between 128 and 255 255 Octets octets in length inclusive (excluding framing bits but including FCS octets). Pkts 256 to Total number of packets (including bad packets) received that were between 256 and 511 511 Octets...

  • Page 165: Roamabout Pc Card Led Activity In A Client

    RoamAbout PC Card LED Activity in a Client If you encounter difficulty using a RoamAbout client, the error may be related to various causes, such as: Out-of range situation, which prevents the PC Card from establishing a wireless connection with the network. Configuration mismatch, which prevents the PC Card from establishing a wireless connection with the (correct) network.
  • Page 166 RoamAbout PC Card LED Activity in a Client Table 7-12: RoamAbout PC Card LED Description Power Transmit /Receive Continuous Blinking Green Flicker Flicker Both LEDs blink once every 10 seconds 7-20 Description/Action Standard operational mode: • Card is powered on. •...

  • Page 167: Windows Does Not Detect The Roamabout Pc Card

    The Microsoft Windows workgroup name is incorrect. Follow the procedure in the next section to check the network protocols. The driver is not loaded. Install the driver as described in the RoamAbout 802.11 PC Card Drivers and Utilities Setup and Installation Guide.

  • Page 168: Checking The Network Protocols On A Windows System

    Checking the Network Protocols on a Windows System Checking the Network Protocols on a Windows System To verify that the client is configured for the correct type of networking and networking protocols on Windows 95, 98, and Me operating systems: 1.

  • Page 169: Device Conflict On A Windows System

    Device Conflict on a Windows System A device conflict under Windows NT may be related to the RoamAbout ISA card or PC Card. To detect which card is causing the conflict, use the Windows NT diagnostics. This problem can also appear on Windows 98 and the early version of Windows 95 (OSR0). To help determine if a device conflict exists, check the following: If there is a conflicting I/O Base setting, the RoamAbout PC Card usually does not work at all and both LEDs are off.

  • Page 170: Windows 95 Or 98

    2. Double-click the System icon. 3. Select the Device Manager tab. 4. Open (click the + sign) Network adapters, select RoamAbout 802.11 DS, then click the Properties button. 5. Click the Resources tab to see the I/O range and IRQ setting.

  • Page 171: Changing The Isa Adapter Address

    Changing the ISA Adapter Address If the device conflict is related to the I/O port address of the ISA card, you can change the ISA address by changing the jumper setting on the ISA card supports two I/O addresses: 3E0-3E1 (factory-set default) 3E2-3E3 To change the jumper setting, open your computer according to the documentation that was shipped with your computer and follow the safety precautions described in the RoamAbout...

  • Page 172: Setting Snmp Trap Addresses (Access Point Only)

    Setting SNMP Trap Addresses (Access Point Only) Setting SNMP Trap Addresses (Access Point Only) To have the AP send SNMP traps, you need to enter the IP address of the device where the trap is to be sent. A trap is a defined event or condition detected by the RoamAbout AP SNMP agent.

  • Page 173: Setting Upline Dump (Access Point Only)

    Setting Upline Dump (Access Point Only) The Upline Dump mode is disabled by default. This option allows you to specify whether the AP uploads diagnostic information about itself in the event of a crash. This option should be DISABLED unless a support representative tells you otherwise. NOTE: This feature is not available on the RoamAbout R2.

  • Page 175: A Pc Card Information

    Consult your authorized RoamAbout reseller sales office for information about the radio regulations that apply in your country. Table A-1: Radio Characteristics R-F frequency band 2.4 GHz (2400-2483.5 MHz) Number of selectable North America (FCC) sub-channels Europe (ETSI) France (FR) Japan (JP) Other countries that adhere to ETSI...
  • Page 176 Table A-2: Radio Characteristics (For Outdoor Antenna Use) R-F frequency band Number of selectable sub-channels Modulation technique Spreading Bit error rate Nominal Output Power Range This variation of the RoamAbout PC Card is not available in FCC regulated countries. This PC Card is used when connecting to an outdoor 14 dBi directional antenna in countries that adhere to radio regulations as defined by the ETSI.

  • Page 177: Supported Frequency Sub-Bands

    LAN administrator who sets the RoamAbout AP configuration. Table A-3 shows the factory-set default values, which are printed in bold. Table A-3: IEEE 802.11 RoamAbout Channel Sets Frequency range Channel ID The Access Point 2000 uses this channel as the default.
  • Page 179 Connecting a Device to the Console Port This Appendix describes how to connect a device to the console port. Refer to the Hardware Installation Guide for more information. You can manage the AP using its console port or using the RoamAbout AP Manager program.
  • Page 180 For the RoamAbout R2 Wireless Access Platform: Assignment [1, 4, 6]* (1) Data Carrier Detect (DCD) (4) Data Terminal Ready (DTR) (6) Data Set Ready (DSR) Receive Data (RXD) Transmit Data (TXD) Ground 7, 8* (7) Request to Send (RTS) (8) Clear to Send (CTS) No connect * [1,4,6] and [7,8] are tied together.
  • Page 181 5. Press <Enter> until the RoamAbout Main Menu is displayed. The Installation Menu allows you to display and modify various AP and wireless networking parameters. If this is a RoamAbout R2, you are prompted for a username and password. The default username is admin and the default password is password.
  • Page 183 This Appendix provides the ASCII to HEX conversion for use with third party products that do not allow ASCII entry of encryption keys. ASCII Value ASCII to HEX Conversion HEX Value Appendix C...
  • Page 184 ASCII Value HEX Value...
  • Page 185 ASCII Value HEX Value...
  • Page 187 802.1X IEEE 802.1X uses security protocols, such as RADIUS, to provide centralized user identification, authentication and dynamic key management. Access Platform See R2 Wireless Access Platform. Access Point A wired to wireless bridge that connects a wireless LAN to a wired Ethernet LAN. Ad-Hoc network A group of wireless clients that participate in wireless communication without connection to a wireless infrastructure network.
  • Page 188 The RoamAbout PC Card can support up to 13 radio frequency channels as defined in the IEEE 802.11 Standard. The number of available channels for your PC Card is subject to radio regulations that apply in your country. In most countries, these radio regulations adhere to either the FCC or ETSI Standards.
  • Page 189 A 7 dBi omni-directional antenna is available as an option for the RoamAbout AP. PC Card A network card that installs in an AP or wireless client to provide wireless connectivity in a LAN environment. PCI Adapter An option for the RoamAbout PC Card for computers that do not have a PCMCIA slot.
  • Page 190 Range Extender Antenna An indoor antenna that extends the coverage area of a RoamAbout wireless device. Rapid Rekeying Also known as Key Tumbling, provides frequent, automatic, redistribution of IEEE 802.11 WEP Encryption keys for enhanced security. RoamAbout AP Manager Software used to manage and configure one or more APs. The software is installed on a Windows computer that connects to the AP via a wired LAN or wireless LAN.
  • Page 191 Wired Equivalent Privacy. Used to encrypt data transmitted via the wireless medium. wireless client A computer such as a PC, laptop, or notebook, that uses the PC card for wireless LAN connectivity. A wireless client is also referred to as a station. wireless infrastructure network A wireless network that consists of wireless clients connected by one or more APs to a wired Ethernet LAN.
  • Page 193 Numerics 802.1X Activation Key description 5-33 entering 5-37 802.1X authentication overview 2-15 parameters 5-32 802.1X Rapid Rekeying See Rapid Rekeying 802.3 ISO Connectionless DSAP filter 5-45 A LED 7-3 Address filter configuring 5-46 overview 2-21 Address State 5-19 Ad-hoc network definition 1-1 description 1-15 hardware installation 3-10...
  • Page 194 Index ASCII character encryption key 5-25 ASCII to HEX conversion C-1 authentication configuring 5-30–5-35 overview 2-14 Authentication trap 7-26 Auto Rate 2-6 B*.BIN file 6-14 Beacon 2-20 BIOS settings 7-24 BootP description 5-19 modifying with console port 5-21 modifying with R2 console port 5-20 BootP/TFTP loader 6-14 use in upgrade 6-14–6-15...
  • Page 195 console port Access Point security 2-19 configuring for security 5-28 connecting a device B-1 description 4-5 infrastructure network 5-7 password 5-28 point-to-multipoint network 5-17 point-to-point network 5-12 security 5-28 tips for using B-3 used with VLAN 5-42 console port (R2) connecting a device B-1 infrastructure network 5-6 point-to-multipoint network 5-16...
  • Page 196 Index Filters address 2-21, 5-46 protocols 2-21, 5-44 rate limiting 2-21 Firmware Revisions integrity test 5-47 Firmware version AP 6-13 fixed rate 2-20, 2-21 flash upgrade definition 4-2 Forbidden VLAN configuration 5-40 Forwarding integrity test 5-47 Frame collisions 2-10, 6-4 G*.Z file 6-14 Gateway 5-20 GMRP 2-23...
  • Page 197 NetBEUI filter 5-44 NetBEUI protocol 2-20 NetBIOS filter 5-45 NetRider Loader 6-14 Netscape Communicator versions 4-6 Network card, previous installation 7-24 Network link up trap 7-26 Network Management Station 2-26, 4-5 Network operating system security 2-12 network utilization description 3-2...
  • Page 198 Index Omni-directional antenna 1-18 Outdoor antenna 1-18, 3-6, 3-7, 6-7 Parameters integrity test 5-47 Passwords 2-12 PC Card 11 Mbit/s 2-6 2 Mbit/s 2-6 description 1-4 diagnostics 6-9 in an AP 1-4 LEDs 7-19 replacing 6-16 unable to detect 7-21 version numbers 6-13 PC Card firmware version 6-13...
  • Page 199 Remote Network Monitoring MIB See RMON Remote RTS Threshold description 2-9–2-10 modifying 5-22 Remote Wireless MAC Address 5-12 Reset button 5-48 Reset button (hardware) 5-48, 6-15 Reset count 7-18 Reset with current settings 5-48 Reset with factory defaults AP 5-48 RMON accessibility 4-5 groups 6-10...
  • Page 200 Index AP placement 6-6–6-7 description 2-7 in ad-hoc network 6-3 outdoor antenna placement 6-7 testing communications quality 6-2–6-3 testing data throughput 6-4 Spanning Tree point-to-multipoint network 5-14, 5-16 point-to-point network 5-9, 5-12 Spanning Tree Protocol 2-22, 5-43 SpectraLink NetLink WTS encryption ASCII to HEX Conversion C-1 SSID 2-2...
  • Page 201 VLAN counters 7-12 VLAN ID configuring with AP Manager 5-41 range 2-23 VLAN Name configuring with AP Manager 5-41 Web management define password 5-28 R2 access 4-6 using 5-49 Web site 1-5 configuring 5-25 description 2-13 Wired Equivalent Privacy See WEP Wired Forwarding LED 7-3 Wired LAN Activity LED 7-5, 7-8 wired MAC address 5-8, 5-13...

This manual is also suitable for:

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Table of Contents