Configuring Quality of Service, 147 | Dell 28XX specification

9

Configuring Quality of Service

This section provides information for defining and configuring Quality of Service (QoS) parameters. To open the Quality of Service page, click Quality of Service in the tree view.

An implementation example that requires QoS includes certain types of traffic such as Voice, Video and real-time traffic which can be assigned a high priority queue, while other traffic can be assigned a lower priority queue. The result is an improved traffic flow for traffic with high demand.

QoS is defined by:

•Classification — Specifies which packet fields are matched to specific values. All packets matching the user-defined specifications are classified together.

•Action — Defines traffic management where packets being forwarded are based on packet information, and packet field values such as VLAN priority (VPT) and DSCP (DiffServ Code Point).

VPT Tag Classification Information

VLAN Priority Tags are used to classify the packets by mapping packets to one of the output queues. VLAN Priority Tag to queue assignments are user-definable. The table below details the VPT to queue default settings:

Table 9-1. CoS to Queue Mapping Table Default values

CoS Value	Forwarding Queue Values

0	q2
1	q1
2	q1
3	q2
4	q3
5	q3
6	q4
7	q4

Packets arriving untagged are assigned a default VPT that is set on a per port basis. The assigned VPT is used to map the packet to the output queue and as the egress VPT.

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Dell 28XX manual Configuring Quality of Service, VPT Tag Classification Information, CoS Value Forwarding Queue Values, 147

Contents

User Guide December Contents Retrieving an IP Address From a Dhcp Server Port Connections, Cables, and Pinout Information Using the Switch Administrator Buttons Using Dell OpenManage Switch Administrator Configuring the Spanning Tree Protocol 116 103114 144 126133 134 161 158 PowerConnect IntroductionSystem Description PowerConnect 2816 Front Panel Features Summary of PowerConnect ModelsGeneral Features AutoMDI/MDIX Support Virtual Cable Testing VCTAuto Negotiation Jumbo Frames Support Layer 2 Features MAC Address Supported Features Vlan Supported Features Spanning Tree Protocol Features Ethernet Switch Management Features Class of Service CoS Features Switch Port Configurations PowerConnect 28xx Front and Back Panel Port DescriptionHardware Description PowerConnect 2808 Back Panel PowerConnect 2824 Front Panel PowerConnect 2824 Back Panel LED Definitions Physical Dimensions Port LEDs Power LEDManaged Mode LED Fan LED 2824/2848 only Managed Mode Button Switch Ventilation FanSFP Port LED RJ-45 Connections for 10/100/1000BASE-T Ports Port Default Settings Connector Port/Interface CableCables, Port Connections, and Pinout Information 1000BASE-T Cable Requirements SFP Pin Connections Pin No Use SFP Ports Internal Power Supply Connector Power Connectors Installation Precautions Installing the PowerConnect Device Unpacking the Device Package ContentsSite Requirements Unpacking Device Rack Installation Mounting the DeviceOverview Bracket Installation for Rack Mounting Installing on a Flat Surface Bracket Installation for Wall Mounting Installing on a Wall Connecting the Device to the Network Connecting the Device Connecting the Terminal to the Device Connecting to Console Port Connecting a Device to a Power Supply Ports, Connectors and Cables Port/Interface Port Connections, Cables, and Pinout InformationRJ-45 Connections for 10/100/1000BaseT Ports Back Pressure Port Default SettingsAuto-Negotiation Flow Control Port Default Settings Function Switching Port Default Settings Dell PowerConnect 28xx Systems User Guide Starting and Configuring the Device Installation and Configuration Flow Booting the Device Managed Mode Initial Configuration Managed Mode Wizard Step Welcome to Dell Easy Setup Wizard Wizard Step Finally, setup the default gateway Advanced Configuration Startup Procedures Startup Menu ProceduresRetrieving an IP Address From a Dhcp Server Erase Flash File Software Download System Image Download Erasing the Device ConfigurationPassword Recovery Software Download Through Tftp Server Boot Image Download Management Modes Default Values Transitioning Between Management Modes Transitioning Between Modes Restore Saved Configuration Returning to Managed Mode Dell PowerConnect 28xx Systems User Guide Understanding the Interface Using Dell OpenManage Switch Administrator Interface Components Name Device Representation Information Buttons Description Using the Switch Administrator ButtonsLed Indicators Component Name Information Buttons Device Management Buttons Description Access LevelsStarting the Application Device Management Buttons Dell PowerConnect 28xx Systems User Guide Dell PowerConnect 28xx Systems User Guide Configuring System Information Defining General Device InformationViewing Device Information Asset Initiating a Telnet Session Viewing the VersionsDefining System Information Click Apply Changes Resetting the Device Resetting the Device Entering Secure Mode Entering Secure Mode Defining IP Interface Parameters Defining Device IP Addresses Setting static IP Interface parameters Running Cable DiagnosticsViewing Copper Cable Diagnostics Open the IP Interface Parameters Set Dhcp to Enable Integrated Cable Test for Copper Cables Performing a Cable Test Displaying Virtual Cable Test Results Table Viewing Optical Transceiver Diagnostics Open the Optical Transceiver Diagnostics Click Show All Defining the Local User Databases Password 0-64 Characters User-defined passwordAssigning Access Rights to a User Managing Device Security Defining a New User Displaying the Local User TableDeleting Users Click Show All Local User Table opens Select a User Name Configuring Radius Global Parameters Open the Radius Settings Defining Radius ParametersAdding a Radius Server Modifying the Radius Server Settings Add Radius Server page opensDisplaying the Radius Server List Defining Snmp Parameters Click Show All Radius Servers List page opensDeleting a Radius Server for the Radius Servers List Enabling Authentication Notifications Defining Snmp Global ParametersEnabling Snmp Notifications Add Snmp Community page opens Defining CommunitiesDefining a New Community Open the Snmp Community Deleting Communities Displaying all Communities 19. Notification Recipients Defining Snmp Notification Recipients Displaying Notification Recipients Tables Adding a new Trap RecipientsOpen Notification Recipients Add Notification Recipients page opens Managing Files Downloading FilesClick Show All Notification Recipients Tables page opens Firmware Download Configuration Download Uploading Files Downloading FilesOpen the File Download From Server Uploading Files Defining Dhcp Server SettingsRestoring Default Settings Restoring Default Settings → Dhcp Server → Dhcp Server Properties in the tree view Configuring Dhcp Properties Click Apply Changes. The server is enabled Defining Network PoolEnabling the Dhcp Server 25. Network Pool Excluding Addresses Adding an Excluded Address Open the Excluded AddressesDeleting Excluded Addresses 28. Static Hosts Manually Allocating IP Addresses Static Hosts Add Static Host page opens Adding a new Static Host Click Show All Static Hosts Table page opens Displaying Static Hosts Tables Deleting Static Hosts Configuring Address Binding Configuring General Device Parameters Defining Advanced Settings Update with your book title Advanced Port Based Authentication Configuring Device SwitchingConfiguring Network Security Port Based Authentication → Port Based Authentication Configuring Port Based Authentication Update with your book title Displaying the Port Based Authentication Table Select an interface in the Port Based Authentication Table Copying Parameters in the Port Based Authentication Table 100 Configuring Advanced Port Based Authentication 101 Displaying the Multiple Hosts Table 102 Authenticating UsersDisplaying the Authenticated Users Table Click Show All Authenticated Users Table opens Configuring Ports Defining Port Parameters103 104 Modifying Port Parameters Displaying the Port Configuration TableAggregating Ports Defining Port Parameters 106 LAG Configuration 107 Displaying the LAG Configuration TableDefining LAG Parameters Modifying LAG Parameters Configuring Green Ethernet LAG Configuration Table opens108 109 11. Green Ethernet Configuration 110 Open the Green Ethernet ConfigurationEnabling Storm Control Enabling Green Ethernet on the Device 111 Enabling Storm Control on the DeviceDisplaying the Storm Control Table Click Show All Storm Control Table opens 112 Defining Port Mirroring Sessions 113 Adding a Port Mirroring SessionOpen the Port Mirroring Add Source Port page opens 114 Configuring Address TablesViewing Dynamic Addresses Deleting a Copy Port from a Port Mirroring Session Redefining the Aging Time Open the Dynamic Address Table115 Sorting the Dynamic Address Table Configuring the Spanning Tree ProtocolDefining STP Global Settings Querying the Dynamic Address Table 117 16. STP Global Settings Modifying STP Global Parameters Open the STP Global SettingsSelect Enable in the Spanning Tree State field Defining STP Global Parameters 119 Defining STP Port Settings 120 Ethernet Fast Ethernet Gigabit Ethernet Displaying the STP Port Table Click Apply Changes. STP is enabled on the portEnabling STP on a Port Modifying STP Port Properties 122 Defining STP LAG Settings 123 124 Configuring Rapid Spanning TreeOpen the STP LAG Settings Modifying the LAG STP Parameters 19. Rapid Spanning Tree Rstp 125 126 Configuring VLANsDefining Vlan Members Enabling Rstp 127 Adding New VLANsOpen the Vlan Membership Create New Vlan page opens 128 Vlan Port Membership TableModifying Vlan Membership Groups Deleting Vlan Membership Groups Assigning Ports to a Vlan Group Deleting a Vlan129 130 Defining Vlan Ports SettingsAssigning Port Settings Open the Vlan Port Settings Defining Vlan LAG Settings Displaying the Vlan Port Table131 132 Assigning Vlan LAG SettingsOpen the Vlan LAG Setting Displaying the Vlan LAG Table 133 Aggregating Ports Open the LAG Membership Configuring a Port to a LAGMulticast Forwarding Support Defining LAG Membership Defining Multicast Global Parameters Enabling Bridge Multicast Filtering on the Device135 Adding Bridge Multicast Address Members Enabling Igmp Snooping on the Device136 Define the Vlan ID and New Bridge Multicast Address fields Adding Bridge Multicast AddressesOpen the Bridge Multicast Group Add Bridge Multicast Group page opens 138 Defining Ports to Receive Multicast ServiceAssigning LAGs to Receive Multicast Service Assigning Multicast Forward All Parameters Port Control Definition 139 140 Attaching a Port to a Multicast Router or SwitchAttaching a LAG to a Multicast Router or Switch Open Bridge Multicast Forward All 141 Igmp Snooping 142 Displaying the Igmp Snooping Table 143 Viewing Statistics Viewing Rmon Statistics Viewing Rmon Statistics Group144 145 Viewing ChartsViewing Interface Statistics Open the Rmon Statistics Group 146 Viewing the CPU Utilization CoS Value Forwarding Queue Values Configuring Quality of ServiceCoS to Queue Mapping Table Default values VPT Tag Classification Information 148 CoS ServicesDscp to Queue Mapping Table Default Values Dscp Value Forwarding Queue Values 149 Enabling Quality of ServiceDefining CoS Global Parameters Selecting Trust Displaying the QoS Interface Settings Table Defining QoS Interface SettingsAssigning QoS/CoS settings for an interface Open the Interface Settings Defining Queue Settings Click Show All QoS Interface Settings Table page opens151 Defining the Queue Settings Open the QoS Queue Settings152 153 Mapping CoS Values to QueuesMapping a CoS value to a Queue Open the CoS to Queue Mapping Table Restoring default values 154 Mapping Dscp Values to QueuesMapping a Dscp value and assigning priority queue 155 156 Telnet Connection Managing the Device Using the CLIAccessing the Device Through the CLI Console Connection 158 Using the CLICommand Mode Overview User Exec Mode Privileged Exec Mode Global Configuration Mode159 Port Channel Mode Interface Configuration ModeInterface Mode Vlan Mode CLI Commands Command asset-tagCommand copy Character Description Command debug-modeCommand Mode Usage Guidelines Command do Command endCommand exit configuration Help Command exit ExecCommand help Examples Interface port-channel port-channel-number Command interface ethernetCommand interface port-channel Interface ethernet interface Ip address ip-address Command interface vlanCommand ip address Interface vlan vlan-id Defaults Command ip default-gatewayCommand login Command ping 168 169 Command reloadCommand show tech-support command Reload 170 Show tech-support config memory Command snmp-server community Default171 172 Command username 173 Glossary 174 175 Host FlappingFlow Control Fragment 177 178 179 180 181 182 183 Index 184 185 186