Fragmentation Threshold | USRobotics Instant802 APSDK specification

Professional Access Point Administrator Guide

Field

Description

Fragmentation Threshold	Specify a number within the range 256–2,346 to set the frame size threshold in
	bytes.
	The fragmentation threshold is a way of limiting the size of packets (frames)
	transmitted over the network. If a packet exceeds the fragmentation threshold
	set here, the fragmentation function will be activated and the packet will be
	sent as multiple 802.11 frames.
	If the packet being transmitted is equal to or less than the threshold, fragmen-
	tation will not be used.
	Setting the threshold to the largest value (2,346 bytes) effectively disables frag-
	mentation.
	Fragmentation involves more overhead both because of the extra work of
	dividing up and reassembling of frames it requires, and because it increases
	message traffic on the network. However, fragmentation can help improve net-
	work performance and reliability if properly configured.
	Sending smaller frames (by using lower fragmentation threshold) may help
	with some interference problems; for example, with microwave ovens.
	By default, fragmentation is off. USRobotics recommends not using fragmen-
	tation unless you suspect radio interference. The additional headers applied to
	each fragment increase the overhead on the network and can greatly reduce
	throughput.

RTS Threshold	Specify an RTS Threshold value within the range 0–2347.
	The RTS threshold specifies the packet size of a request to send (RTS) trans-
	mission. This helps control traffic flow through the access point, especially one
	with a lot of clients.
	If you specify a low threshold value, RTS packets will be sent more frequently.
	This will consume more bandwidth and reduce the throughput of the packet.
	On the other hand, sending more RTS packets can help the network recover
	from interference or collisions which might occur on a busy network, or on a
	network experiencing electromagnetic interference.

Maximum Stations	Enter a value within the range 0–2007.
	Specify the maximum number of stations allowed to access this access point at
	any one time.

Radio - 132

Image 132

USRobotics Instant802 APSDK manual Fragmentation Threshold, Maximum Stations

Contents

Professional Access Point Administrator Guide R46.1224.00 rev 2.0 07/06Page Professional Access Point Administrator Guide USA Professional Access Point Administrator Guide Contents Class Structure, Commands, and Examples AdvancedClass and Field Reference Support Information Robotics Corporation Two 2 Year Limited Warranty Viii Administrator Audience Online Help Features Recommended Settings, Notes and Cautions Typographical Conventions Getting Started Features and Benefits Ieee Standards Support and Wi-Fi ComplianceWireless Features Security Features Guest Interface Clustering and Auto-ManagementNetworking What’s Next? Snmp SupportMaintainability Professional Access Point Default Settings for the Professional Access Point Option Default Settings Related Information Ieee 802.11 Mode Transmit PowerSecurity Mode None Authentication Type Administrator’s Computer What the Access Point Does Not ProvideRequired Software or Component Description Wireless Client Computers Required Component Description How Does the Access Point Obtain an IP Address at Startup? Dynamic IP AddressingRequired Component Recovering an IP Address Static IP Addressing Professional Access Point Administrator Guide Unpack the access point Access Point Hardware and PortsWhat’s inside the Access Point? Connect the access point to network and power UK Users Hardware Connections for a Guest Vlan Professional Access Point Administrator Guide Professional Access Point Administrator Guide Professional Access Point Administrator Guide Viewing Basic Settings for Access Points Field Default SettingLog on to the Web User Interface Username Configure Basic Settings and start the wireless network Default Configuration Wall Mounting the Access Point Make Sure the Access Point is Connected to the LAN Test LAN Connectivity with Wireless Clients Web User Interface Navigating to Basic Settings Review / Describe the Access Point Field DescriptionMAC Address Firmware Version Provide Administrator Password and Wireless Network Name Administrator PasswordAdministrator Password again Wireless Network Name Ssid Set Configuration Policy for New Access Points New Access PointsField Update Basic Settings Summary of Settings Basic Settings for a Standalone Access Point Your Network at a Glance Understanding Indicator IconsIcon Description Professional Access Point Administrator Guide Access Points Cluster Navigating to Access Points Management Understanding Clustering What is a Cluster? How Many APs Can a Cluster Support?What Kinds of APs Can Cluster? Settings Not Shared by the Cluster Cluster Mode Standalone ModeCluster Formation Understanding Access Point Settings Auto-Synchronization of Cluster ConfigurationCluster Size and Membership Intra-Cluster Security Removing an Access Point from the Cluster Modifying the Location Description Adding an Access Point to a Cluster Http//IPAddressOfAccessPoint Professional Access Point Administrator Guide Professional Access Point Administrator Guide User Management Navigating to User Management for Clustered Access Points Viewing User AccountsAdding a User Editing a User Account Enabling and Disabling User AccountsEnabling a User Account Real Name Restoring a User Database from a Backup File Removing a User AccountBacking Up and Restoring a User Database Disabling a User Account Professional Access Point Administrator Guide Professional Access Point Administrator Guide Sessions Navigating to Session Monitoring Understanding Session Monitoring Information User AP Location User MAC Idle Rate Viewing Session Information for Access Points Signal Utilization Rx Total Tx Total Error RateSorting Session Information Refreshing Session Information Professional Access Point Administrator Guide Channel Management Navigating to Channel Management Understanding Channel ManagementHow it Works Overview Overlapping Channels Background Information Configuring and Viewing Channel Management Settings Example a Network before and after Channel Management Stopping/Starting Automatic Channel Assignment Viewing Current Channel Assignments and Setting Locks Viewing Last Proposed Set of ChangesIP Address Band Current Locked IP Address Current Proposed Use these channels when applying channel assignments AdvancedChange channels if interference is reduced by at least Determine if there is better set of channels every Apply channel modifications even when the network is busy Professional Access Point Administrator Guide Wireless Neighborhood Navigating to Wireless Neighborhood Understanding Wireless Neighbourhood Information Viewing Wireless Neighborhood Display neighboring APsCluster Neighbors Viewing Details for a Cluster Member Details for a Cluster Member AP Signal ChannelBeacon Age Status Interfaces Ethernet Wired Settings Wireless Settings Events Log Relay Host for Kernel Messages Setting Up the Log Relay Host Understanding Remote LoggingSYSLOGD=-r Tmp/APsyslog Log Relay Host Enabled EnabledEtc/init.d/sysklogd restart Relay Host Transmit/Receive Statistics Events Log Errors Client AssociationsName Ssid Total Packets What is the Difference Between an Association and a Session? Link Integrity Monitoring Neighboring Access Points Select AP Detection Enabled Beacon Int TypePrivacy # of Beacons Last BeaconRates Professional Access Point Administrator Guide Ethernet Wired Settings Advanced Navigating to Ethernet Wired Settings Setting the DNS Name Managing Guest AccessConfiguring an Internal LAN and a Guest Network Enabling and Disabling Guest Access Guest Access For Guest access, useSpecifying a Virtual Guest Network Configuring Internal Interface Ethernet Settings Virtual Wireless Networks Default Gateway Static IP AddressDNS Nameservers Configuring Guest Interface Ethernet Wired Settings Updating SettingsSubnet Professional Access Point Administrator Guide Wireless Settings Navigating to Wireless Settings Configuring 802.11d Regulatory Domain Support 802.11d Regulatory Domain Support Configuring the Radio Interface Configuring Internal LAN Wireless SettingsMode Channel Configuring Guest Network Wireless Settings Read-only field Understanding Security Issues on Wireless Networks How Do I Know Which Security Mode to Use?Security When to Use No Security User Authentication Key ManagementEncryption Algorithm Encryption Algorithms When to Use WPA/WPA2 Enterprise Radius Does Prohibiting the Broadcast of Ssid Enhance Security? How Does Station Isolation Protect the Network? Navigating to Security Settings Configuring Security SettingsBroadcast SSID, Station Isolation, and Security Mode None Static WEP Professional Access Point Administrator Guide Transfer Key Index Key LengthBits Key Type Authentication Algorithm Open System Shared Key Both Example of Using Static WEP Static WEP with Transfer KEY Indexes on Client Devices Ieee Authentication Server Enable Radius AccountingWPA/WPA2 Personal PSK Radius IP WPA Versions Cipher Suites WPA/WPA2 Enterprise Radius Key Enable pre-authentication Improving the security of the network Enter the Radius IP Professional Access Point Administrator Guide Guest Login Configuring Guest Access Using Virtual LANsConfiguring a Guest Network on a Virtual LAN DSL/T1 Configuring the Welcome Screen Captive Portal Using the Guest Network Configuring Guest Access without Virtual LANs Configuring a Guest Network on a Dedicated Access Point Virtual Wireless Networks Navigating to Virtual Wireless Network Settings Configuring VLANs Virtual Wireless NetworkOne Two Ton Professional Access Point Administrator Guide Understanding Radio Settings Radio Navigating to Radio Settings Configuring Radio SettingsStatus On/Off Mode Ieee 802.11bSuper G Maximum Stations Rate Sets Broadcast a subset of its supported rate sets Professional Access Point Administrator Guide Navigating to MAC Filtering Settings MAC Filtering Using MAC Filtering Filter Stations List Professional Access Point Administrator Guide Load Balancing Understanding Load BalancingSpecifying Limits for Utilization and Client Associations Navigating to Load Balancing Settings Configuring Load BalancingLoad Balancing and QoS Utilization for No New Associations Utilization for DisassociationStations Threshold for Disassocia Tion To apply your changes, click Update Settings Quality of Service Understanding QoSQoS and Load Balancing 802.11e and WMM Standards Support QoS Queues and Parameters to Coordinate Traffic Flow Professional Access Point Administrator Guide Random Backoff and Minimum / Maximum Contention Windows Navigating to QoS Settings Configuring QoS Queues Configuring AP Edca Parameters Enabling/Disabling Wi-Fi Multimedia Configuring Station Edca Parameters Data 0 Voice Txop Limit Transmission Opportunity Limit Professional Access Point Administrator Guide Wireless Distribution System Understanding the Wireless Distribution SystemUsing WDS to Bridge Distant Wired LANs Backup Links and Unwanted Loops in WDS Bridges LAN Segment Navigating to WDS Settings Security Considerations Related to WDS Bridges Configuring WDS Settings Local Address Remote AddressBridge with Internal Network Example of Configuring a WDS Link DisabledWEP Key Local Address Professional Access Point Administrator Guide Navigating to Time Protocol Settings Time Protocol Enabling and Disabling a Network Time Protocol NTP Server NTP Server Professional Access Point Administrator Guide Snmp Understanding Snmp Navigating to Simple Network Management Protocol Enable Snmp Read-only Community Name entireAllow Snmp SET Requests Read-write community name for per Configuring Your Network Management System Rebooting and Upgrading Your Access Point Using SnmpSource hostname or subnet Rebooting Your Access Point Using Snmp Upgrading your Access PointFtp//testuser1testuser1@192.168.1.9922/54531.1.23.tar Ftp//192.168.1.100/54531.1.24.tar Professional Access Point Administrator Guide Reboot Reset Configuration Upgrade Professional Access Point Administrator Guide Backup/Restore Navigating to Backup and Restore Settings Backing up Configuration Setting for an Access Point Restoring Access Point Settings to a Previous Configuration Professional Access Point Administrator Guide Command Line Interface Professional Access Point Administrator Guide Basic Settings Yes Described in Backup/Restore on How to Access the CLI for an Access Point Telnet Connection to the Access PointUSR5453-AP login Password USR5453-AP login admin Password Enter help for help SSH2 Connection to the Access Point Telnet Function Telnet CommandStatus Status Down Login as USR5453-AP# Quick View of Commands and How to Get Help Commands and SyntaxSSH Function SSH Command Set ssh Status Command Get logGet log-entry Get bss wlan0bssInternal Command Description Add radius-user wally Getting Help on Commands at the CLI Remove radius-user wally Command Usage and Configuration Examples Ready to Get Started? Professional Access Point Administrator Guide Understanding Interfaces as Presented in the CLI Interface DescriptionWlan0vwn1 Vlan1234 Saving Configuration Changes Get interface vlanVLANID roleGet interface vlan1234 role Basic Setting Example Get the MAC Address for an Access Point Get Both the IP Address and MAC Address Wlan0wds1 Wds Down Wlan0wds2 Wlan0wds3 USR5453-AP# Get the Firmware Version for the Access Point Get the Location of the Access PointSet the Location for an Access Point Get the Current Password Access Point and Cluster Settings Cluster Command ExampleGet MAC Addresses for all Access Points in the Cluster User Accounts User Account Command Example Get All User AccountsUSR5453-AP#get radius-user all name name USR5453-AP#set radius-user samantha password westport USR5453-AP#set radius-user samantha disabledAdd Users USR5453-AP#add radius-user samantha username samantha Status Command Example Remove a User AccountUSR5453-AP#remove radius-user wally Larry samantha endora darren USR5453-AP#get interface br0 Get Current Settings for the Ethernet Wired Guest Interface Get Current Wireless Radio Settings USR5453-AP# get radio wlan0 detail Get Status on EventsUSR5453-AP# get log-entry Priority Daemon USR5453-AP#set log relay-enabled USR5453-AP#set log relay-host USR5453-AP#set log relay-host myserverUSR5453-AP#set log relay-port USR5453-AP# get log Get neighbouring Access Points Get Transmit / Receive StatisticsGet Client Associations USR5453-AP#get detected-ap USR5453-AP# get detected-ap Ethernet Wired Interface Wired Interface Command Example Get Wired Internal Interface Settings Get Wired Guest Interface SettingsSet Up Guest Access Get Summary View of Internal and Guest Interfaces USR5453-AP#get interface brguest status down USR5453-AP#remove bridge-port br0 interface eth0USR5453-AP# get bss USR5453-AP# get interface brguest USR5453-AP#get interface brguest status upUSR5453-AP#get bridge-port brguest USR5453-AP#get bridge-port br0 Name Interface Get/Change the Connection Type Dhcp or Static IP USR5453-AP#get dhcp-client status upUSR5453-AP#set dhcp-client status up USR5453-AP#get interface br0 detail Re-Configure Static IP Addressing Values USR5453-AP#get interface br0 static-ipUSR5453-AP#set interface br0 static-ip USR5453-AP#get interface br0 static-mask Wireless Interface Security Security Command Example Get the Current Security ModeGet Detailed Description of Current Security Settings USR5453-AP#get interface wlan0 security none Enable / Disable Station Isolation Set the Broadcast Ssid Allow or Prohibit Set Security to None USR5453-AP#set interface wlan0 security noneSet Security to Static WEP USR5453-AP#set interface wlan0 security static-wep Set bss wlan0bssInternal open-system-authentication on Set bss wlan0bssInternal shared-key-authentication offSet bss wlan0bssInternal shared-key-authentication on USR5453-AP#set interface wlan0 wep-key-ascii yes USR5453-AP#get interface wlan0 detail Set Security to Ieee USR5453-AP#set interface wlan0 security dot1xRadius Option Example USR5453-AP#set bss wlan0bssInternal radius-ip USR5453-AP#set bss wlan0bssInternal radius-key secret Set BssUSR5453-AP#set bss wlan0bssInternal radius-accounting off USR5453-AP#get interface wlan0 security dot1x Set Security to WPA/WPA2 Personal PSK USR5453-AP#set interface wlan0 security wpa-personalWPA Option Example Cipher Suite Option Example Set bss wlan0bssInternal wpa-cipher-tkip onSet bss wlan0bssInternal wpa-cipher-ccmp off Set bss wlan0bssInternal wpa-cipher-tkip off USR5453-AP#get interface wlan0 security wpa-personal Set Security to WPA/WPA2 Enterprise Radius USR5453-AP#set interface wlan0 security wpa-enterprise Enable Pre-Authentication Cipher Suite Option USR5453-AP#set bss wlan0bssInternal radius-key KeepSecret USR5453-AP#set bss wlan0bssInternal radius-accounting on USR5453-AP#get interface wlan0 security wpa-enterprise Enable/Configure Guest Login Welcome View Guest Login SettingsEnable/Disable the Guest Welcome Set Guest Welcome Page Text Configuring Multiple BSSIDs on Virtual Wireless Networks Review Guest Login SettingsConfiguring Virtual Wireless Network One on Radio One Set interface wlan0vwn1 security wpa-enterprise Radio Settings Radio Setting Command ExampleGet Ieee 802.11 Radio Mode Creating VWN Two on Radio One with WPA security Get Basic Radio Settings Get All Radio SettingsGet Radio Channel Configure Radio Settings Get Supported Rate SetUSR5453-AP#get supported-rate Get Basic Rate Set USR5453-AP#set radio wlan0 mode g USR5453-AP#set radio wlan0 beacon-intervalUSR5453-AP#set bss wlan0bssInternal dtim-period USR5453-AP#get bss wlan0bssInternal dtim-period USR5453-AP#set radio wlan0 fragmentation-threshold USR5453-AP#set radio wlan0 rts-thresholdUSR5453-AP#add basic-rate wlan0 rate USR5453-AP#add supported-rate wlan0 rate MAC Filtering USR5453-AP#get supported-rate wlan0 rate Specify an Accept or Deny List Set bss wlan0bssGuest mac-acl-name GuestAdd MAC Addresses of Client Stations to the Filtering List Get Current MAC Filtering Settings USR5453-AP#remove mac-acl Guest macGet bss interface mac-acl-mode USR5453-AP#get bss wlan0bssGuest mac-acl-mode accept-list Quality of Service QoS CommandLoad Balancing QoS Command Example Enable/Disable Wi-Fi Multimedia About Access Point and Station Edca Parameters Understanding the Queues for Access Point and StationData Access Point Station Get QoS Settings on the Access Point Get QoS Settings on the Client StationUSR5453-AP#get wme-queue Set Arbirtation Interframe Spaces Aifs Setting Minimum and Maximum Contention Windows cwmin, cwmax Set wme-queue wlan0 with queue QueueName to aifs AIFSValueUSR5453-AP#set wme-queue wlan0 with queue vo to aifs Set the Maximum Burst Length burst on the Access Point USR5453-AP#set wme-queue wlan0 with queue vi cwmin 7 cwmaxSet tx-queue wlan0 with queue QueueName to burst burstValue USR5453-AP#set tx-queue wlan0 with queue data2 to burst USR5453-AP#set wme-queue wlan0 with queue vo to txop-limit Wireless Distribution System Configuring a WDS LinkGetting Details on a WDS Configuration USR5453-AP#set interface wlan0wds0 remote-mac 00E0B8761B14 Time Protocol Set ntp server ntp.instant802.comUSR5453-AP#get ntp detail Reboot the Access Point Reset the Access Point to Factory DefaultsUSR5453-AP#factory-reset Keyboard Shortcuts and Tab Completion Help Keyboard Shortcuts Tab Completion and HelpAction on CLI Keyboard Shortcut USR5453-AP#get system v USR5453-AP#get system version CLI Class and Field Overview USR5453-AP# set mac-acl Field Reference on Has name? \ # of instances? One Multiple CLI Class Relationships Class Index AssociationClass Description Authenticated Field IndexInterface Station Basic-rate Bridge-port Bss Path-costPriority Status DescriptionRadio Beacon-interface Mac Dtim-periodMax-stations Ignore-broadcast-ssid Open-system-authentication Channel-plannerCluster Cluster-member Config DefaultNo-external-updates Debug Detected-ap Field Description Beacon-interval Capability Type Dhcp-client ErpBeacons Last-beacon Dot11 HostDebug Dot11d Dns-12 DomainStatic-dns-12 Static-domain Interface Mask Rx-errors TypeStatic-ip Static-mask Tx-errors Rx-compressedRx-multicast Tx-packets Ip-route Jvm KickstartdLog Gateway Log-entry DepthNumber Time Mac-acl NtpMessage Server Portal Welcome-screenWelcome-screen-text Max-bss Tx-power Max-bssChannel-policy Mode Wmewifinoacktest Rts-thresholdFragmentation-threshold Load-balance-disassociation-utilization Radius-user SerialSnmp Ro-community Ssh Supported-rateSystem Rw-community Password Encrypted-passwordPassword-initialized Telnet Tx-queue CommunityQueue Web-ui Wme-queue Professional Access Point Detection Utility does not find Possible Solution Access point Cannot access the Web User Interface My wireless device cannot find the wireless network Possible Solution Wireless Distribution System WDS Problems and Solutions Am experiencing poor wireless link quality Cluster Recovery Reboot or Reset Access Point Stop Clustering and Reset Each Access Point in the Cluster Click Stop Clustering Professional Access Point Administrator Guide Support Information Country Webmail Voice UAE Declaration of Conformity Detachable Antenna InformationFCC Radiation Exposure Statement Radio and Television Interference For Canadian Users Industry Canada ICUL Listing/CUL Listing CE Compliance Declaration of Conformity Regulatory Channel Frequency EU Health ProtectionEU Detachable Antenna Information Professional Access Point Administrator Guide Professional Access Point Administrator Guide Robotics Corporation Two 2 Year Limited Warranty Obtaining Warranty Service Limitations Disclaimer 802 802.1x802.2 802.3 802.11b 802.11d802.11e 802.11f AES Beacon BridgeBroadcast Broadcast Address Bssid CcmpCGI CSMA/CA DCF DhcpDNS DOM EAP EdcfESS Ethernet Frame GatewayHtml Http Infrastructure Mode IbssIeee Intrusion Detection IPSec ISPJitter Latency LAN LdapLLC MAC NAT NICNTP OSI Packet Packet LossPHY PID PPP PSK Radius RC4Rssi RTP Snmp SsidSTP Supported Rate Set TCPTCP/IP Tkip UDP UnicastURL Vlan WAN WDSWEP Wins WMM WPA WPA2Wrap XML Index DCF Ieee Snmp WDS Index-328