Symbol Technologies WS 2000 manual WLAN-Advanced Access Port Settings

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WLAN—Advanced Access Port Settings

The advanced Access Port settings are found at the bottom of the screen. For most installations, the default settings for the advanced settings are appropriate.

1.Select either Indoors or Outdoors from the Placement pop-up menu. The setting will affect the selection available for several of the other advanced settings.

2.Select a channel number from the Channel drop-down list on which the Access Port should communicate with associated MUs. (The available channels vary depending on the location setting of the switch.)

3.Select a power level from the Power Level drop-down list that will be used for radio communications between the Access Port and the MUs.

4.Select both the Slowest Supported Rate and the Fastest Supported Rate from the respective drop-down lists to specify the allowable transmission rates for communication between the Access Port and the associated MUs.

5.Check the Antenna Diversity checkbox to enable Antenna Diversity if the Access Port has an external antenna.

6.Check the Support Short Preamble checkbox to allow the Access Port to communicate with the MUs using a short 56-bit preamble.

A preamble is the beginning part of a frame. The preamble comprises such elements as robust carrier sensing, collision detection, equalizer training, timing recovery, and gain adjustment. The administration can choose between a long or short preamble for data- frame transmission from the WLAN’s adopted access ports.

Use the long preamble setting (the default) for legacy wireless equipment that is not capable of dealing with short preambles. Use the short preamble setting where legacy equipment is not an issue and maximum throughput is desired, for example when streaming video or Voice-over-IP applications are used.

7.Set the Request to Send Threshold (RTS Threshold) by specifying a number.

RTS is a transmitting station’s signal that requests a Clear To Send (CTS) response from a receiving station. This RTS/CTS procedure clears the air when many mobile units (MUs) are contending for transmission time. Modifying this value allows the administrator to control the number of data collisions and thereby enhance communication with nodes that are hard to find because of other active nodes in the transmission path.

In this field, the administrator can specify a Request To Send (RTS) threshold (in bytes) for use by the WLAN’s adopted access ports.

This setting initiates an RTS/CTS exchange for data frames that are larger than the threshold, and sends (without RTS/CTS) any data frames that are smaller than the threshold.

Consider the tradeoffs when setting an appropriate RTS threshold for the WLAN’s access ports. A lower RTS threshold causes more frequent RTS/CTS exchanges. This consumes more bandwidth because of the additional latency (RTS/CTS exchanges) before transmissions can commence. A disadvantage is the reduction in data-frame throughput. An advantage is quicker system recovery from electromagnetic interference and data collisions. Environments with more wireless traffic and contention for transmission make the best use of a lower RTS threshold.

A higher RTS threshold minimizes RTS/CTS exchanges, consuming less bandwidth for data transmissions. A disadvantage is less help to nodes that encounter interference and collisions. An advantage is faster data-frame throughput. Environments with less wireless traffic and contention for transmission make the best use of a higher RTS threshold.

Copyright © 2004 Symbol Technologies, Inc. All Rights Reserved

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WS 2000 Wireless Switch: 1.0 Date of last Revision: March 2004

 

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Contents WS 2000 Wireless Switch Version System Reference72E-67701-01 Rev a March Copyright PatentsTable of Contents Chapter Advanced Configuration Chapter Field Office Example 111 WS 2000 Wireless Switch System Reference Guide About this DocumentDocument Conventions Management of Access Ports Wireless LAN Wlan SecuritySystem Overview Firewall SecurityTechnical Specifications Physical SpecificationsHardware Overview Operating System OS Services Cell Controller ServicesPower Specifications Environmental SpecificationsGateway Services 802.11a Support 802.11b SupportAccess Ports Gateway Services WS 2000 Wireless Switch FirewallNetwork Address Translation NAT Layer 3 Routing Snmp Management SupportDhcp Client and Server Overview802.1x with Radius Authentication WEP 64 40-bit keyWEP 128 104-bit Key 802.1x with Shared Key Authentication Kerberos AuthenticationWireless Protected Access WPA KeyGuard-MCM SupportInstalling the Switch Set up Communication to the SwitchGetting Started Overview Getting Started Overview Changing the Administrator Password Configure the LAN Interface Configuring the SwitchDefining the Subnets Field DescriptionConfigure Subnets InterfacesDhcp Configuration Advanced Dhcp Settings Configure the WAN Interface Communicating with the Outside WorldSetting Up Point-to-Point over Ethernet PPPoE Communication Enable Wireless LANs WLANs ChapWireless Summary Area Configure WLANs Access Port AdoptionConfigure Wlan Security Field Description NameSubnet Setting the Authentication Method 802.1x EAP AuthenticationSetting the Encryption Method Kerberos AuthenticationConfiguring WEP Encryption Configuring WPA-TKIP Configure Wlan Security KeyGuard-MCM No EncryptionConfigure Access Ports Mobile Unit Access Control List ACLConfigure Access Ports Configure Subnet Access NameAccess Overview Table Access Exception AreaColor Access Type Description Green YellowProtocol Transport Description Port Used HttpTransport Description ALLAdvanced Configuration WLAN-How to Configure Advanced SettingsWLAN-Setting Default Access Port Settings WLAN-Setting Default Access Port Settings Beacon Interval Dtim PeriodWLAN-Advanced Access Port Settings Primary WlanSecurity Beacon WLAN-Advanced Access Port Settings Beacon is a packet broadcast by the adopted access ports to Gateway-How to Configure Network Address Translation NAT Gateway-How to Configure Network Address Translation NAT Gateway-How to Configure the WS 2000 Firewall Always On Firewall FiltersConfigurable Firewall Filters Gateway-How to Configure Static Routes Mime Flood Attack CheckSetting the RIP Configuration Defining RoutesNo RIP RIPSecurity-How to Configure 802.1x EAP Authentication RIP v2Compat NoneSecurity-How to Configure 802.1x EAP Authentication Security-How to Configure 802.1x EAP Authentication Security-How to Configure Kerberos Authentication Security-How to Specify a Network Time Protocol NTP Server Switch Settings WS 2000 Wireless Switch LED FunctionsOverview Location DescriptionChanging the Name of the Switch Change the Location and Country Settings of the WS Location fieldHow to Restart the WS 2000 Wireless Switch Updating the WS 2000 Wireless Switch’s FirmwareChecking for and Downloading Firmware updates Performing the Firmware UpdateSystem Configuration Exporting and Importing Wireless Switch SettingsTo Import or Export Settings to an FTP Site To Import Settings to a Local FileTo Export Settings to a Local File How to Restore Default Configuration Settings Property Value Remote Administration How to Configure Snmp TrapsSetting the Snmp Version Configuration Setting Up Snmp v1/v2c Community DefinitionsSetting Up Snmp v3 Community Definitions NoAuthAuthNoPriv AuthPrivSetting Up the Access Control List Setting the Trap ConfigurationAuthentication ConfigurationTrap Trap Name Generates a Trap when… Category Cold StartSetting the Trap Configuration for Snmp v1/v2c Configure Administrator Access Setting the Trap Configuration for SnmpConfigure Management Access Access Port DescriptionAccess Port Statistics Setup AirBEAM Software AccessChanging the Administrator and Manager Passwords Statistics and LogsGeneral Access Port Information Received and Transmitted Tables Associated Mobile UnitsSubnet Statistics Received Field Description Transmitted Description FieldWAN Statistics InterfacesReceived Field Description Setting Up and Viewing the System Log Viewing the Log on the SwitchSetting Up a Log Server Retail Use Cases BackgroundPlan Configuring the System Settings Contacting the Wireless SwitchEntering the Basic System Settings Setting Access Control Configuring the Subnets IP Address PlanSubnet IP Address Range Configuring POS Subnet For each subnetConfiguring the Printer Subnet Retail Use Cases Configuring the Cafe Subnet Retail Use Cases Configuring the WAN Interface Configuring Network Address Translation NAT Retail Use Cases Configuring the Access Ports Setting Access Port DefaultsSwitch Port Connected to Inspecting the FirewallNaming the POS Access Port Configuring the Printer Access Port Configuring the Cafe Access Port Associating the Access Ports to the WLANs Configuring the WLANs Configuring the Cafe WlanConfiguring the Printer Wlan Name PrinterConfiguring the POS Wlan For the POS WLAN, she makes the following choicesSetting Subnet Access Retail Use Cases Testing Connections Configuring the ClientsWireless Authentication Encryption Channel Client IP Address Subnet Mask Gateway PortField Office Example Plan Configuring the System Settings Entering the Basic System Settings Setting Access Control Field Office Example Configuring the LAN Configuring the Engineering LANField Office Example Field Office Example Configuring the Sales Subnet Configuring the WAN Field Office Example Setting Up Network Address Translation Field Office Example Confirm Firewall Configuration Adopting Access PortsMAC Address Location Adoption List LabelField Office Example Configuring the WLANs Security Field Office Example Wlan Field Office Example Field Office Example Field Office Example Access Port Channel Configuring Subnet Access Installing the Access Ports and Testing Appendix A. Sample Configuration File NTP menu Wlan 1 configuration set mode 1 enable Wlan 3 configuration set mode 3 disable Default 802.11 a radio configuration set reg a in/out 149 Access Port configuration LAN Dhcp configuration network Firewall configuration set syn enable Outbound 1-To-Many NAT configuration set outb map s1 Page Index FTP Snmp 802.1x EAP authentication
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