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Cisco Systems DL-2159-05 manual What is QoS?, Limitations and Restrictions, Related Documents

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Chapter 1 Overview

Quality of Service Support

What is QoS?

QoS refers to the ability of a network to provide improved service to selected network traffic over various underlying technologies including Ethernet and wireless LANs. In particular, QoS features provide improved and more predictable network service by providing the following services:

•Improving loss characteristics

•Avoiding and managing network congestion

•Prioritizing service to different kinds of network traffic

•Shaping network traffic

•Setting traffic priorities across the network

Limitations and Restrictions

The QoS implementation on the access point has the following limitations and restrictions:

•Provides only prioritized QoS for downlink traffic on IEEE 802.11 links and does not support a general purpose QoS signalling protocol, uniform admission control, guaranteed bandwidth, and other features that are generally associated with parametized QoS.

•Supports rudimentary admission control mechanisms for Spectralink and Symbol VoIP phones.

•Does not provide a method for prioritizing uplink traffic on IEEE 802.11 links.

•Does not offer 802.1X authentication for Symbol VoIP phones because those phones do not support an 802.1X type such as LEAP or EAP-TLS.

•The DTIM beacon period must be small to support jitter-sensitive streaming multicast audio and video applications.

•Supports IEEE 802.11e EDCF-like channel access prioritization but does not support IEEE 802.11e QoS frame formats.

Related Documents

The following documents provide more detailed information pertaining to QoS design and configuration:

•Cisco IOS Switching Services Configuration Guide

•Cisco Internetworking Design Guide

•Cisco Internetworking Technology Handbook

•Cisco IOS Quality of Service Solutions Command Reference, Version 12.2

•Cisco Internetworking Troubleshooting Guide

These documents are available on Cisco.com.

Cisco Aironet 1200 Series Access Point Software Configuration Guide

1-4	OL-2159-05

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Cisco Systems DL-2159-05 manual What is QoS?, Limitations and Restrictions, Related Documents

Contents

Corporate Headquarters Text Part Number OL-2159-05Copyright 2001-2003, Cisco Systems, Inc All rights reserved N T E N T S IiiNavigating Using the Map Windows Native Vlan ID WEP Not Set on the Wireless Phone Settings on the Authenticator Configuration ViiEvent Notifications Setup ViiiSetting Up Administrator Authorization Snmp Setup Ssid Xii Organization Audience and ScopeXiii Tip Means the following are useful tips ConventionsXiv Obtaining Documentation Related PublicationsCisco.com Documentation Feedback Documentation CD-ROMOrdering Documentation XviTAC Case Priority Definitions Obtaining Technical AssistanceCisco TAC Website Opening a TAC Case XviiObtaining Additional Publications and Information XviiiOverview A P T E RKey Features Management Options Quality of Service SupportRoaming Client Devices Related Documents What is QoS?Limitations and Restrictions These documents are available on Cisco.comWhat is a VLAN? Vlan SupportIncorporating Wireless Devices into VLANs Level of Access Vlan ExampleNetwork Configuration Examples Root Unit on a Wired LANRepeater Unit that Extends Wireless Range Access Points as Root Units on a Wired LANCentral Unit in an All-Wireless Network Access Point as RepeaterUsing the Management Interfaces Using the Management Pages in the Web-Browser Interface Using the Web-Browser InterfaceUsing the Web-Browser Interface for the First Time Button/Link DescriptionNavigating Using the Map Windows Map Window with Network Ports Pages ExpandedUsing the Command-Line Interface Preparing to Use a Terminal EmulatorConnecting the Serial Cable Changing Settings with the CLISetting Up the Terminal Emulator Selecting Pages and Settings Function DescriptionUsing a Telnet Session Using SnmpApplying Changes to the Configuration Supported MIBs Radio Configuration and Basic Settings Basic Settings Express SetupSystem Name Entering Basic SettingsExpress Setup page contains the following settings MAC AddressDefault IP Subnet Mask Configuration Server ProtocolDefault IP Address Default GatewayRoot-Unit Access Points Security Setup Link Radio Network Optimization Optimize Radio Network ForSnmp Admin. Community Radio ConfigurationRadio Network Compatibility Ensure Compatibility With Settings on the AP Radio Identification Entering Identity InformationDefault IP Subnet Mask Primary Port SettingsDefault IP Address Service Set ID SsidLeap Password Entering Radio Hardware InformationAP Radio Hardware page contains the following settings Settings on the AP Radio HardwareAllow Broadcast Ssid to Associate? Enable World Mode Data RatesRTS Threshold Transmit PowerFrag. Threshold Max. RTS RetriesSearch for Less-Congested Radio Channel Default Radio ChannelRestrict Searched Channels Entering Advanced Configuration Information Receive Antenna and Transmit AntennaAP Radio Advanced Page for Internal Radio Requested Status Settings on the AP Radio AdvancedAP Radio Advanced pages contain the following settings Packet ForwardingRadio Cell Role Default Multicast Address FiltersMaximum Multicast Packets/Second Ssid For Use By Infrastructure StationsUse Aironet Extensions Classify Workgroup Bridges as Network InfrastructureRequire Use of Radio Firmware Quality of Service Setup LinkVlan Setup Link Ethernet Encapsulation TransformTemporal Key Integrity Protocol Advanced Primary Ssid Setup LinkPreferred Access Points Broadcast WEP Key rotation interval secRadio Modulation Radio PreambleEthernet Configuration Non-Root MobilitySettings on the Ethernet Identification Entering Ethernet Hardware InformationEthernet Hardware page contains the following settings Settings on the Ethernet HardwareSpeed Loss of Backbone Connectivity Action Loss of Backbone Connectivity # of SecsLoss of Backbone Connectivity Ssid Settings on the Ethernet Advanced Ethernet Advanced page contains the following settingsDefault Unicast and Multicast Address Filters Always Unblock Ethernet When STP is Disabled Default Unicast Address FilterOptimize Ethernet for OL-2159-05 Configuring VLANs Vlan setup page contains the following settings Settings on the Vlan SetupEntering Vlan Information Vlan Summary Status Link 802.1Q Encapsulation ModeMaximum Number of Enabled Vlan IDs Vlan 802.1Q TaggingOptionally allow Encrypted packets on the unencrypted Vlan Vlan Security PolicySingle Vlan ID which allows Unencrypted packets Vlan NameParameter Native Vlan ConfigurationBroadcast Domain Segmentation TKIP/MICPrimary and Secondary SSIDs Deployment of Infrastructure and Non infrastructure DevicesRADIUS-Based Vlan Access Control Vlan IDCriteria for Deploying Wireless VLANs VlanWireless Vlan Deployment Example 5shows the wireless Vlan deployment scenario described above Creating and Configuring VLANs on the Access Point Using the Configuration ScreensObtaining and Recording Vlan ID and Setup Information Creating the Native VlanVlan Setup Vlan ID #1 Setup Creating the Full- and Part-Time VLANs Creating the Maintenance Vlan Creating the Guest VlanCreating and Configuring the SSIDs AP Radio Internal Service Sets Configuring VLANs Wireless Vlan Deployment Example Enabling Vlan 802.1Q Tagging and Identifying the Native Vlan 11 AP Radio Service Sets Guidelines for Wireless Vlan Deployment Creating an Ssid for Infrastructure DevicesOL-2159-05 Configuring Filters and QoS Filter Setup Protocol FilteringCreating a Protocol Filter Enter a descriptive filter set name in the Set Name fieldFilter Set Enabling a Protocol Filter MAC Address Filtering Address FiltersCreating a MAC Address Filter AP Radio Advanced AP Radio Primary Ssid QoS Configuration Use Symbol Extensions Settings on the Quality of Service SetupGenerate Qbss Element Send Igmp General Query Applying QoSBy Station Traffic Category10 Protocol Filters Setup By Vlan 12 Vlan ID13 Filters Priority Setting By FilterBy CoS Value By Dscp ValueWireless QoS Deployment Example 17 Vlan Setup18 Vlan ID #xx WEP Set on the Wireless Phone WEP Not Set on the Wireless Phone20 AP Radio Internal Service Sets 21 AP Radio Internal Service Sets OL-2159-05 Configuring Proxy Mobile IP Proxy Mobile IP Introduction to Mobility in IPMobile Approach Nomadic ApproachMobile IP Explained Mobile IP Environment Proxy Mobile IP Explained Mobile IP Traffic PatternBefore Deploying Proxy Mobile IP Issues to Consider While Deploying Proxy Mobile IP Components of a Proxy Mobile IP NetworkHow Proxy Mobile IP Works Agent DiscoverySubnet Map Exchange Home Agent Subnet MaskRegistration TunnelingProxy Mobile IP Setup Proxy Mobile IP SecurityProxy Mobile IP Setup GeneralEnable Proxy Mobile IP Authentication ServerSettings on the Proxy Mobile IP General Authoritative AP nSettings on the Authenticator Configuration Settings on the Local SA Bindings Local SA BindingsSettings on the Proxy Mobile IP Statistics StatisticsActive AAP Authentication Failures for HAAuthentication Failures for FA MN IP AddressesSettings on the Subnet Map Table Configuring Proxy Mobile IPView Subnet Map Table Configuring Proxy Mobile IP on Your Wired LAN 11 a Sample Network 13 AP Radio Internal Service Sets 15 Proxy Mobile IP General 17 Subnet Map Table 18 Authenticator Configuration 20 Network Configuration Screen for an Access Point Client 22 Passed Authentication Screen Configuring Other Settings Server Setup Entering Time Server SettingsSettings on the Time Server Setup Settings on the Boot Server Setup Entering Boot Server SettingsBoot Server Setup page contains the following settings Bootp Server Timeout sec Configuration Server ProtocolUse Previous Configuration Server Settings Dhcp Multiple-Offer Timeout secDhcp Client Identifier Type Dhcp Requested Lease Duration minDhcp Minimum Lease Duration min Option DefinitionDhcp Client Identifier Value Settings on the Web Server SetupWeb Server Setup page contains the following settings Dhcp Class IdentifierAllow Non-Console Browsing Default Help Root URLDefault Web Root URL Http PortDefault Domain Entering Name Server SettingsSettings on the Name Server Setup Domain Name SystemFTP Setup page contains the following settings Entering FTP SettingsSettings on the FTP Setup Domain Name ServersRouting Setup New Network Route Settings Entering Routing SettingsRouting Setup page contains the following settings Installed Network Routes list Association Table Display SetupAssociation Table Filters Configuring Other Settings Association Table Display Setup Stations to Show Settings on the Association Table FiltersFields to Show Bytes To/From Station Association Table AdvancedPackets To/From Station Primary SortSettings on the Association Table Advanced Association Table AdvancedMaximum number of bytes stored per Station Alert packet Rogue AP Alert Timeout minutesHandle Station Alerts as Severity Level Maximum Number of Forwarding Table EntriesSettings on the Event Display Setup Event Notification SetupEvent Display Setup Default Activity Timeout seconds Per Device ClassSeverity Level at which to display events How should time generally be displayed?How should Event Elapsed non-wall-clock Time be displayed? Severity Level DescriptionEvent Handling Setup 10 The Event Handling Setup Handle Station Events as Severity Level Settings on the Event Handling SetupDisposition of Events Maximum number of bytes stored per Alert packetClear Alert Statistics Event Notifications SetupPurge Trace Buffer Snmp Trap Destination Settings on the Event Notifications SetupShould Notify-Disposition Events generate Snmp Traps? Snmp Trap CommunitySyslog Facility Number Should Syslog Messages use the Cisco Emblem Format?Syslog Destination Address Ieee Snmp Traps Should Generate the Following NotificationsSecurity Setup Security Overview Encrypting Radio Signals with WEPLevels of Security Additional WEP Security Features Network Authentication TypesSequence for EAP Authentication Wired LAN Client Combining MAC-Based, EAP, and Open Authentication Sequence for Open AuthenticationSetting Up WEP Protecting the Access Point Configuration with User ManagerKey Access Point Associated Device Transmit? Key ContentsNot set Enabling Message Integrity Check MIC Enabling Additional WEP Security FeaturesUsing Snmp to Set Up WEP Snmp Variable WEP Full WEP OffAP Radio Advanced Page for Internal Radio Enabling Temporal Key Integrity Protocol Tkip Enabling Broadcast WEP Key Rotation Setting Up Open or Shared Key Authentication Setting Up EAP Authentication Enabling EAP on the Access PointFirmware Version Draft 802.1x-2001 Access Point EAP Settings for Various Client Configurations Click Add New Access Server Enabling EAP in Cisco Secure ACSSetting Up a Repeater Access Point As a Leap Client Setting a Session-Based WEP Key TimeoutAP Radio Identification Page for Internal Radio Setting Up MAC-Based Authentication Enabling MAC-Based Authentication on the Access Point11 Authenticator Configuration Security Setup Setting Up MAC-Based Authentication 12 AP Radio Advanced Authenticating Client Devices Using MAC Addresses or EAP Enabling MAC-Based Authentication in Cisco Secure ACS Authentication Types Required Settings Summary of Settings for Authentication TypesLeap EAP-TLS, EAP-MD5 Radius Attributes Sent by the Access Point Attribute ID DescriptionAcct-Authentic Acct-Delay-TimeAcct-Session-Id VSA attribute Nas-location Vlan-id Auth-algo-typeSetting Up Backup Authentication Servers Acct-Terminate-CauseSetting Up Administrator Authorization 14 Security Setup Creating a List of Authorized Management System Users16 User Management Window Click Add New User. The User Management window appears Setting up Centralized Administrator AuthenticationClick User Information. The User Information page appears Click Apply. You are returned to the User Information18 Authenticator Configuration System Flow Notes Authorization Parameters Network Management Setting the Display Options Using the Association TableBrowsing to Network Devices Using Station Pages StationInformation on Station Pages Station Identification and StatusTo Station Information Rate, Signal, and Status InformationFrom Station Information Hops and Timing Information Performing Pings and Link TestsPerforming a Ping Performing a Link Test Click Link TestDeauthenticating and Disassociating Client Devices Using the Network Map WindowClearing and Updating Statistics Using Cisco Discovery Protocol Settings on the CDP Setup MIB for CDPAssigning Network Ports Port AssignmentsEnabling Wireless Network Accounting Settings on the Port AssignmentsSettings on the Accounting Setup Accounting SetupAccounting Attributes Attribute DefinitionRadiusipadr OL-2159-05 Managing Firmware and Configurations 10-1Updating with the Browser from a Local Drive Full Update of the Firmware ComponentsUpdating Firmware 10-2Selective Update of the Firmware Components 10-3Updating from a File Server 10-4Update All Firmware From File Server 10-5Update Firmware From File Server 10-6Retrieving Firmware and Web Page Files 10-7Distributing Firmware 10-8Distributing a Configuration 10-9Limiting Distributions 10-10Downloading the Current Configuration 10-11Uploading from a File Server Uploading a ConfigurationUploading from a Local Drive 10-12Resetting the Configuration 10-13Restarting the Access Point 10-14Management System Setup 11-1Settings on the Snmp Setup Snmp Setup11-2 Settings on the Database Query Using the Database Query11-3 Changing Settings with the Database Query Console and Telnet Setup11-4 Using Secure Shell Settings on the Console/Telnet11-5 11-6 Special Configurations 12-1Setting Up a Repeater Access Point 12-212-3 12-4 Using Hot Standby Mode 12-512-6 12-7 12-8 Sections in this chapter include 13-1Selections on the Network Diagnostics Using Diagnostic PagesNetwork Diagnostics 13-2Radio Diagnostics Tests 13-3SSIDs Int, Mod Vlan Summary Status13-4 Network Ports 13-5Data Received Identifying Information and Status13-6 Ethernet Port Data Transmitted13-7 Receive Statistics Configuration Information13-8 Transmit Statistics AP Radio13-9 13-10 AP Radio Port13-11 Display Options 13-12Event Log Display Settings13-13 Event Log Summary Log HeadingsSaving the Log 13-14Command Information Displayed Using Command-Line Diagnostics13-15 Entering Diagnostic Commands 13-16Eapdiag1on Diagnostic Command Results13-17 Vxdiagarpshow Eapdiag2on13-18 13-19 Vxdiagcheckstack 13-20Vxdiaghostshow 13-21Vxdiagi 13-22Vxdiagipstatshow 13-23Vxdiagmemshow 13-24Vxdiagmuxshow 13-25Vxdiagrouteshow 13-26Vxdiagtcpstatshow 13-27Vxdiagudpstatshow Reserving Access Point Memory for a Packet Trace Log FileTracing Packets 13-28Tracing Packets for Specific Devices 13-29Packets Stored in a Log File Tracing Packets for Ethernet and Radio PortsViewing Packet Trace Data 13-30Packets Displayed on the CLI Checking the Top Panel Indicators13-31 Message Ethernet Status Radio Meaning Type Indicator 13-32Finding an Access Point by Blinking the Top Panel Indicators 13-33WEP Keys Checking Basic SettingsEAP Authentication Requires Matching 802.1x Protocol Drafts 13-34Firmware Version Draft 13-35Resetting to the Default Configuration 13-3613-37 13-38 Channels, Power Levels, and Antenna Gains Ieee 802.11a ChannelsRegulatory Domains Maximum Power Levels and Antenna Gains Ieee 802.11bRegulatory Domain With 6-dBi Antenna Gain Maximum Power Level mWRegulatory Domain Antenna Gain dBi Maximum Power Level mW Americas -A 100 Eirp maximum 13.5 Emea -E MW Eirp maximumRegulatory Domain Antenna Gain dBi Maximum Power Level mW OL-2159-05 Protocol Filter Lists Protocol ISO DesignatorSVP UDP XNS-IDP ISO-TP4 ISO-CNLP CnlpVines SmtpTsap TftpHttp POP2IRC CmotBGP RIPCVS RadiusRFE Event Log Messages Cisco Emblem Format Default FormatMessage Formats With a timestamp, messages look like this exampleLogemerg LoginfoSyslog Severity Emblem Severity LogalertSeverity Event Description Mnemonic Recommended Action Message DescriptionsPossible Cause or ReasonDevice HostSrchost NewaddrIfDescr Desthost length pktLen Srchost to port ifDescrReqlen bytes Packet from srchost to desthost IfDescr error= errornumDesthost on port ifDescr Srchost to desthost on port IfDescr error=erronumFor procedure on port ifDescr From srchost to desthost on portSrchost on port ifDescr Srchost to desthost of unknown VersionDesthost Admin SysrebootRebootinf PrtrarpipPort device Status IfDescr errno=errno PktLenXidexp ENC WEPUnenc EtherconMedia port Frame bytes FramePort devName unit Username FailedUsername UnitAssoclost 1XVERHstndbyen HstndbyethAmngrreq InstkeyAcctcon NulsesNoaserv NorbufNosbuf OpenVlanID IfIndex MIB IfIndex AwcmibTaskfailed NomibdkeyBadsize TaskstartedSsidIdx Statuses and Reasons Appendix C Event Log Messages Statuses and Reasons OL-2159-05 Numerics IN-1CLI CDP MIBDhcp DtimIN-3 Radio traffic Ethernet Locate unit by flashing LEDsIN-4 Pspf IN-5Vlan SSHIN-6 Warm restart IN-7IN-8