Switch Forwarding Database FDB | Extreme Networks Summit1 manual

6Switch Forwarding Database (FDB)

This chapter describes the contents of the switch forwarding database (FDB), how the FDB works, and how to configure the FDB.

OVERVIEW OF THE FDB

The Summit maintains a database of all media access control (MAC) addresses received on all of its ports. It uses the information in this database to decide whether a frame should be forwarded or filtered.

FDB CONTENTS

The database holds up to a maximum of 128K entries. Each entry consists of the MAC address of the device, an identifier for the port on which it was received, and an identifier for the VLAN to which the device belongs. Frames destined for devices that are not in the FDB are flooded to all members of the VLAN.

FDB ENTRY TYPES

The following are three types of entries in the FDB:

•Dynamic entries — Initially, all entries in the database are dynamic. Entries in the database are removed (aged-out) if, after a period of time (aging time), the device has not transmitted. This prevents the database from becoming full with obsolete entries by ensuring that when a device is removed from the network, its entry is deleted from the database. Dynamic entries are deleted from the database if the

SUMMIT SWITCH INSTALLATION AND USER GUIDE

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Extreme Networks Summit1 manual Switch Forwarding Database FDB, Overview of the FDB, FDB Contents, FDB Entry Types

Contents

Summit Switch Installation and User Guide Page Contents Installation and Setup Page Virtual Lans Vlans Switch Forwarding Database FDB Quality of Service QOS Routing Protocols IP Multicast Routing Technical Specifications Troubleshooting Figures 10-3 Tables 10-6 Introduction Preface Terminology ConventionsText Conventions Icon Alerts you to Related Publications Preface Summit Overview About the Summit Family of Switches Summary of Features Summit Switch Models Switch Model 1Summit Switch Port ConfigurationsPort Connections Gigabit Ethernet Ports Fixed Redundant Standard Media Type Mhz/Km Maximum Rating Distance 2Media Types and Distances Backup Active FULL-DUPLEXPort Redundancy Spanning Tree Protocol STP Load Sharing Quality of Service QOS IP Unicast RoutingIP Multicast Routing 2Network configuration using the Summit family of switches Network Configuration Example Network Configuration Example 3Summit1 front view SUMMIT1 Front View 4Summit2 front view SUMMIT2 Front View 5Summit3 front view SUMMIT3 Front View 6Summit4 front view SUMMIT4 Front View 7Summit4/FX front view SUMMIT4/FX Front View 8Summit48 front view SUMMIT48 Front View Color Indicates 10/100Mbps Port Status LEDsGigabit Ethernet Port Status LEDs Redundant Power Supply Port Power SocketSummit Rear View Serial Number 4Summit Factory Defaults Factory DefaultsDefault Setting MAC Address RIP Summit Overview Installation and Setup Following Safety InformationDetermining the Switch Location 1Media Types and Distances Media Types and Distances Rack Mounting Installing the Summit Connecting Equipment to the Console Port Stacking the Switch and Other DevicesFREE-STANDING Function Pin Number 2Console Connector Pin-OutsSummit PC/Terminal Summit Powering on the Switch Checking the InstallationLogging in for the First Time Save Installation and Setup Accessing The Switch Understanding the Command Syntax Command Completion with Syntax HelperSyntax Helper Abbreviated Syntax Command ShortcutsNumerical Ranges Names Symbols 1Command Syntax SymbolsSymbolDescription LINE-EDITING Keys Command History2Line-Editing Keys Keys Description Common Commands 3Common CommandsCommand Description Switch Configuring Management Access Default Accounts 4Default AccountsAccount Name Access Level Creating a Management Account Account name admin cannot be deleted Methods of Managing the Summit Using the Console Interface Using Telnet Connecting to Another Host Using TelnetConfiguring Switch IP Parameters For more information on DHCP/BOOTP relay, refer to Chapter For example Disabling Telnet Access Disconnecting a Telnet Session 5IP Host Configuration Commands IP Host Configuration Commands Disabling WEB Access Using Extremeware Vista Supported Mibs Accessing Switch Agents6Supported MIBs Description RFC Number Configuring Snmp Settings 7SNMP Configuration Commands Displaying Snmp Settings Resetting and Disabling Snmp8SNMP Reset and Disable Commands Checking Basic Connectivity 9Ping Command ParametersPing Traceroute Mtrace Accessing the Switch Enabling and Disabling Ports Configuring Ports Turning OFF Autonegotiation for a Gigabit Ethernet Port Configuring Port Speed and Duplex Setting 1Port Commands Port Commands Chapter Load Sharing 2Port Combinations for the Summit1 Configuring Load Sharing3Port Combinations for the Summit2 4Port Combinations for the Summit3 6Port Combinations for the Summit48 5Port Combinations for the Summit4 and Summit4/FX PORT-MIRRORING Verifying the Load Sharing Configuration PORT-MIRRORING Commands 7Port-Mirroring Configuration CommandsPORT-MIRRORING Example Summit Virtual Chassis Summit Switch Port ConnectionsSummit2 Summit3 Extreme Discovery Protocol Summit4/FXSummit48 9Summit Virtual Chassis Commands Summit Virtual Chassis Commands Vlans and Summit Switches Using the Virtual Chassis Configuring Ports Virtual LANs VLANs Overview of Virtual LansBenefits PORT-BASED Vlans Types of Vlans Sales 2Single port-based Vlan spanning two switches Switch Tagged Vlans 3Two port-based VLANs spanning two Switches Uses of Tagged Vlans Switch = Marketing = Sales= Tagged port -4 and Figure Generic Vlan Registration Protocol 6Network example using Gvrp 1GVRP Commands = IP traffic = All other traffic PROTOCOL-BASED Vlans IPX Precedence of Tagged Packets Over Protocol Filters Vlan Names Configuring Vlans on the Summit Default Vlan2VLAN Configuration Commands Etype Llc Snap Vlan Configuration Examples Sample output from this command is as follows Displaying Vlan Settings Deleting Vlans 3VLAN Delete and Reset Commands FDB Contents Switch Forwarding Database FDBOverview of the FDB FDB Entry Types HOW FDB Entries GET Added Configuring FDB Entries 1FDB Configuration CommandsAssociating a QOS Profile with AN FDB Entry FDB Configuration Examples Displaying FDB Entries Removing FDB Entries 2Removing FDB Entry Commands Spanning Tree Protocol STP Overview of the Spanning Tree ProtocolSpanning Tree Domains Defaults STP Configurations Switch Y Switch Z Switch M Switch a Switch B Marketing & Sales Marketing, Sales & Engineering Configuring STP on the Summit Stpd 1STP Configuration Commands Configuration Example Displaying STP Settings 2STP Disable and Reset Commands Disabling and Resetting STP Spanning Tree Protocol STP Quality of Service QoS Overview of Quality of ServiceBuilding Blocks Default QOS Profiles QOS Mode 1Default QoS Profiles Traffic GroupingsProfile Name Priority Minimum Bandwidth Maximum Bandwidth 802.1p Value QoS Profile 2802.1p Values and Associated QoS Profiles Ingress Mode Assigning a QOS Profile Creating and Configuring a QOS Profile Port Queue Monitor 3PQM Commands 4QoS Configuration Commands Configuring QOS Sample Egress Mode QOS Configuration Sample Ingress Mode QOS Configuration Displaying QOS Information Resetting QOS Overview of IP Unicast Routing IP Unicast Routing 1Routing between VLANs Router Interfaces Populating the Routing Table Proxy ARP IP Multinetting Bootp works only on the Vlan assigned to the IP protocol Assign the subnet to a physical port IP Unicast Routing Configuring IP Unicast Routing Verifying the IP Unicast Routing Configuration Configuring DHCP/BOOTP Relay 1Basic IP Commands Verifying the DHCP/BOOTP Relay Configuration Disables routing for one or more VLANs 2Route Table Configuration Commands 3ICMP Configuration Commands MyCompany Routing Configuration Example 2Unicast routing configuration example 4Router Show Commands Displaying Router Settings 5Router Reset and Disable Commands Resetting and Disabling Router Settings Overview Routing Protocols RIP Versus Ospf Routing Table Overview of RIPSplit Horizon Poison Reverse Triggered Updates Route Advertisement of VlansRIP Version 1 Versus RIP Version Overview of Ospf Link State DatabaseAreas Area 3Virtual link providing redundancy 2Virtual link for stub area 1RIP Configuration Commands Configuring RIP 10-9 RIP Configuration Example 4RIP configuration example 2RIP Show Commands Displaying RIP Settings 3RIP Reset and Disable Commands Resetting and Disabling RIP 4OSPF Configuration Commands Configuring Ospf Default Minimum Maximum Ospf Configuration Example HeadquartersLos Angeles Following is the configuration for the router labeled ABR1 Configuration for ABR1 Displaying Ospf Settings Configuration for IR15OSPF Show Commands 6OSPF Reset and Disable Commands Resetting and Disabling Ospf Settings 10-20 IP Multicast Routing Igmp Overview Configuring IP Multicasting Routing 1IP Multicast Routing Configuration Commands 2IGMP Configuration Commands Seconds. The default setting is 10 seconds 1IP multicast routing configuration example Configuration Example 3IP Multicast Routing Show Commands Displaying IP Multicast Routing Settings 4IP Multicast Routing Reset and Disable Commands Deleting and Resetting IP Multicast Settings 1Switch Monitoring Commands Status Monitoring and StatisticsStatus Monitoring 12-2 Messages and higher are displayed 12-4 Displays detailed system-related information, including 12-6 Port Statistics Port Errors 2Port Monitoring Display Keys Port Monitoring Display Keys 3Fault Levels Assigned by the Switch Switch Logging4Fault Log Subsystems Level Description Local Logging Remote Logging Logging Commands 5Logging Commands Rmon Rmon Features of the Switch Rmon and the Switch Event Actions 6Event ActionsAction High Threshold 12-18 Enabling and Disabling WEB Access Using ExtremeWare Vista Setting UP Your Browser Navigating Extremeware Vista Accessing Extremeware Vista Task Frame Content Frame1Multi-Select List Box Key Definitions Selection Type Key Sequence Standalone Buttons Saving Changes Sending Screen Output to Extreme Networks Do a GET When Configuring a Vlan Downloading a NEW Image Software Upgrade and Boot Options Rebooting the Switch Returning to Factory Defaults Saving Configuration Changes Using Tftp to Download the Configuration Using Tftp to Upload the Configuration 1Boot Option Commands Boot Option Commands 14-6 Safety Information Important Safety InformationPower France and Peru only Power Cord Connections Fuse Lithium Battery Safety Technical SpecificationsEnvironmental Requirements Electromagnetic Compatibility Protocols Used for Administration Power SupplyHeat Dissipation Standards Supported Snmp Power LED does not light Troubleshooting Initial welcome prompt does not display Using the COMMAND-LINE Interface Traps are not received by the Snmp Network Manager Vlans STP Troubleshooting Dvmrp Index EDP Index PQM Rmon Default Index of Commands Ii-Index of Commands Index of Commands-iii