Dell PC2708, PC2748, PC2716 Enabling Storm Control, Configuring Storm Control on the PowerConnect

Page 65

Enabling Storm Control

When Layer 2 frames are forwarded, Broadcast, Multicast and Unknown Unicast frames are flooded to all ports on the designated VLANs on the switch. When the switch experiences an excessive amount of Broadcast/Multicast/Unknown Unicast frames on network links, Storm Control mechanism controls the amount of frames entering the switch.

The Storm Control page is used to configure the settings of packet Storm Control. Storm Control can be enabled or disabled per port. The Storm Control page displays the type of packets, and the rate at which packets are received.

Configuring Storm Control on the PowerConnect 2708

The PowerConnect 2708 switch measures the incoming Broadcast/Multicast/Unknown Unicast packet rate per port, and discards excess packets when the rate exceeds the defined threshold value. In addition to the count definition per port, the Broadcast rate threshold is configured to exclude certain values.

The PowerConnect 2708 switch users can do the following:

•Set the threshold value for Broadcast packets on a per-portbasis, to prevent Broadcast storms.

•Enable Storm Control per port, with limitations based on: Unknown Unicast, Multicast and Broadcast frames, Multicast and Broadcast frames, or Broadcast frames only.

Figure 6-16. Storm Control (PowerConnect 2708 Configuration)

Port — The port from which the Storm Control is enabled.

Broadcast Control — Enables or disables forwarding Broadcast packet types on the switch.

Broadcast Mode — Sets the mode of Broadcast Storm Control based on the types of traffic selected. The possible options for types of traffic are Unknown Unicast, Multicast & Broadcast, and Broadcast only.

65

Image 65

Contents User’s Guide October Contents Using the Dell OpenManage Switch Administrator Viewing Statistics Contents Gigabit Ethernet Ports IntroductionSystem Description 48 1-Gigabit Ethernet Ports 16 1-Gigabit Ethernet Ports24 1-Gigabit Ethernet Ports + 2 SFP Combo ports General Features FeaturesHead of Line Blocking Prevention Management ModesAuto Negotiation Virtual Cable Testing VCTJumbo Frames Support AutoMDI/MDIX SupportLayer 2 Features MAC Address Supported FeaturesClass of Service CoS Features Vlan Supported FeaturesPort Default Settings Ethernet Switch Management FeaturesPage Hardware Description Switch Port ConfigurationsPowerConnect 2708 Back Panel PowerConnect 2724 Back Panel PowerConnect 2748 Back Panel Power LED Physical DimensionsManaged Mode LED LED Definitions10/100/1000BASE-T Port LEDs Fan LED 2748 onlyPort LEDs SFP Port LED Managed Mode ButtonCables, Port Connections, and Pinout Information Switch Ventilation Fan1000BASE-T Cable Requirements RJ-45 Connections for 10/100/1000BASE-T PortsSFP Ports Pin Connections for SFP Interfaces Power ConnectorsInternal Power Supply Connector Overview Installing the Dell PowerConnectInstallation Precautions Unpacking SafetySite Requirements Unpacking the Device Package ContentsHandling Static Sensitive Devices Mounting the Device Installing the Device in a Rack Installing the DeviceInstalling the Device on a Wall Installing the Device on a Flat SurfaceMounting Device on a Wall Connecting the Device to AC Power SupplyBack Panel Power Connector Connecting the Device to the NetworkInitial Configuration Starting and Configuring the Dell PowerConnectViewing Switch Operation Login Screen Click Apply Changes Page Understanding the Interface Using the Dell OpenManage Switch AdministratorInterface Components Description Information Buttons Using the OpenManage Switch Administrator ButtonsPowerConnect Switch Management Buttons Starting the Application PowerConnect Switch Management Buttons DescriptionReset Resetting the DeviceDisplaying Configuration on Demand Viewing the Switch Status Configuring System InformationDefining Switch Information Viewing System IP Address Defining Switch InformationIP Addressing Updating Static IP AddressConfiguring Dhcp Client Interface Configuration Defining Interface ConfigurationPage Viewing Jumbo Frames Configuring the InterfaceOpen the Interface Configuration Enabling Jumbo Frames Creating Vlan MembershipShowing/Creating VLANs Defining Vlan Interface SettingsRemoving VLANs Open the Vlan MembershipOpen the Vlan Interface Settings Configuring LAG MembershipUpdating the Vlan Interface Settings Adding a Port to a LAG Open the LAG Aggregation ConfigurationManaging System Files Downloading Files from Server Downloading Files From ServerFirmware Download File Download PowerConnect 2748 Switch ConfigurationUploading Files Configuration DownloadCopying Files Open the File Upload to ServerClick Restore Company Factory Defaults Click Apply Changes Restoring Company Factory Default SettingsOpen the Local User Database Assigning Access Level User RightsLocal User Database Deleting a User from the Local User Database Integrated Cable Test for Copper CablesAdding a User to the Local User Database Click Test Now Running Integrated Cable TestOpen the Integrated Cable Test Open the Optical Transceiver Diagnostics Optical Transceivers DiagnosticsDisplaying Optical Transceivers Diagnostics Test Results Click show All Port MirroringAdding a Port Mirroring Session Open the Port MirroringEnabling Storm Control Configuring Storm Control on the PowerConnectConfiguring Storm Control on the PowerConnect 2716/2724 Modifying PowerConnect 2708 Storm Control Port ParametersFollowing describes Storm Control for PowerConnect Modifying PowerConnect 2748 Storm Control Port Parameters VPT Tag Classification Information Configuring Quality of ServiceQuality of Service QoS Overview CoS Services Configuring QoS Settings Defining CoS SettingsMapping CoS Values to Queues Configuring the Trust ModeMapping a Dscp value and assigning priority queue Mapping Dscp Values to QueuesMapping a CoS value to a Queue Page Rmon Statistics Viewing StatisticsOpen the Rmon Statistics Viewing Interface StatisticsGlossary Duplex Mode Class of ServiceBroadcast Storm Dhcp ClientFragment Flow ControlFrame Gigabit EthernetIP Address Ingress PortJumbo Frames LayerMAC Layer Managed ModeMask MulticastPage Switch Startup ConfigurationQoS RouterWildcard Mask TrunkingUnicast