Forwarding Database FDB | 3Com 9100 instruction

Spanning Switches with Port-Based VLANs 67

Tagged VLANs	69
Uses of Tagged VLANs			70
Assigning a VLAN Tag			70
Mixing Port-Based and Tagged VLANs 72
Protocol-Based VLANs		72
Predefined Protocol Filters				73
Defining Protocol Filters				74
Deleting a Protocol Filter				75
Precedence of Tagged Packets Over Protocol Filters 75
VLAN Names 75
Default VLAN	75
Configuring VLANs on the Switch				76
VLAN Configuration Examples				77
Displaying VLAN Settings		78
Deleting VLANs	79

5FORWARDING D ATABASE (FDB)

Overview of the FDB	81
FDB Contents 81
FDB Entry Types	81
How FDB Entries Get Added		82
Associating a QoS Profile with an FDB Entry 82
Configuring FDB Entries 83
FDB Configuration Examples		83
Displaying FDB Entries	84
Removing FDB Entries	85

6SPANNING T REE P ROTOCOL (STP)

Overview of the Spanning Tree Protocol 87

How STP Works	89
Initialization	89
Stabilization	90
Reconfiguration		90
Spanning Tree Domains		90
Defaults 91
STP Configurations	91

Image 6

3Com 9100 manual Forwarding Database FDB

Contents

SuperStack Switch User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Installation and Setup Virtual Lans Vlans Forwarding Database FDB Quality of Service QOS Using the WEB Interface Technical Specifications Troubleshooting Page Ethernet concepts Ethernet switching and bridging concepts About this Guide Convention Description ConventionsIcon Description Screen displays Year RelatedDocumentation Compliance About this Guide Features Switch 9100 OverviewSwitch About Simple Network Management Protocol Snmp For information on load sharing, refer to Chapter Virtual LANs VLANs Network ConfigurationQuality of Service QoS Example Switch 9100 used in a backbone configuration Key Front panel has the following features ViewPorts Standard Media Type Mhz/Km Rating Maximum Distance Describes the LED behavior on the SwitchLEDs Color Indicates 1000BASE-SX Port Status LEDs Switch 9100 Rear shows the Switch 9100 rear view Color Indicates 100/1000BASE-TX Port Status LEDsUnit Status LED Serial Number Power SocketsReset Button MAC Address Public Installation and Setup DeterminingLocation Installing TabletopRack Mounting Installing the Switch 9100 Connecting Equipment to the Console Port Function Pin Number Direction Switch Installation Flashes until the switch has successfully passed the Post Logging on for Default Vlan named defaultLogin admin First Time Installation and Setup Accessing the Switch Accessing the Switch You could enter the following shortcut Be a range of numbers, for example Config snmp community readonly readwrite string Symbol DescriptionConfig vlan name ipaddress ipaddress Reboot date time cancel Create account admin user username encrypted password Line-Editing Keys Command Description Disable clipaging Disable bootp vlan name allDisable cli-config-logging Disable idletimeout Show banner Configuring Management AccessUnconfig switch all 3C177052 Changing the Default Password Account Name Access Level3C1770519# Create account admin user username encrypted Viewing AccountsShow accounts Profiles Methods Managing SwitchUsing Access Deleting an Account Config access-profile accessprofile Access Profile Example To view the contents of an access profile, type Connecting to Another Host Using Telnet Using TelnetTo view the Telnet configuration, type Using a Bootp Server Manually Configuring the IP Settings For example Config vlan name ipaddress ipaddress subnetmaskConfig iproute add default ipaddress metric Your changes take effect immediately Terminate the session by using the following command Show sessionClear session sessionnumber On the switch CommandsUsing the Web IP Host Agents Using SnmpAccessing Switch Supported MIBs Enable Snmp access Enable Snmp traps Command Checking Basic Ping command syntax isOptions for the ping command are described in Table Connectivity Enabling Switch 9100 PortsConfiguring Switch Port Speed Duplex Setting Disabling Enable sharing masterport Enable learning ports portlistEnable ports portlist Config ports portlist qosprofile Disable sharing masterport Disable learning ports portlistDisable ports portlist Show ports portlist txerrors Accessing the Switch Enable sharing 4 grouping Verifying the Load ConfigurationPort-Mirroring Sharing Example CommandsDisable mirroring Show mirroring Accessing the Switch VLANs help to control traffic VLANs provide extra security Igmp Overview VLANs ease the change and movement of devicesIgmp Snooping Enable igmp vlan name Enable igmp snoopingForward-mcrouter-only Forward-mcrouter-only is specified, Types of VLANs Port-Based VLANs Spanning Switches with Port-Based VLANs Marketing Finance Sales Switch AccountingEngineering Uses of Tagged VLANs Assigning a Vlan Tag Shows a logical diagram of the same network Tagged Ports Mixing Port-Based and Tagged VLANs Predefined Protocol Filters Following protocol filters are predefined on the switchNetBIOS DECNet IPX8022 AppleTalk Config protocol protocolname add protocoltype Hexvalue Defining Protocol FiltersCreate protocol protocolname Vlan Names Deleting a Protocol FilterPackets Over Protocol Configuring VLANs On the Switch 6 to it Displaying Vlan Settings To display Vlan settings, use the following commandShow vlan name Deleting VLANs Virtual Lans Vlans Forwarding Database FDB Associating a QoS Profile with an FDB Entry Entries Config fdb agingtime numberDisable learning ports Following example adds a permanent entry to the FDB To display FDB entries, use the command Displaying FDB EntriesShow fdb macaddress vlan name portlist Permanent Removing FDB Delete Fdbentry macaddress vlanName Clear fdb macaddress vlan name portlist Forwarding Database FDB Spanning Tree Spanning Tree Protocol STPOverview Protocol Network with an illegal topology Initialization Traffic flowing through Bridge B Reconfiguration DomainsStabilization STPD2 contains VLANs Manufacturing and Engineering Stpd Marketing & Sales Marketing, Sales & Engineering Enable stpd stpdname Configuring STP on the SwitchConfig stpd stpdname add vlan name Create stpd stpdname Shows the commands used to configure STP Enable stpd port portlist Settings Displaying STPThrough 3, and port Resetting STP Listed in Table Spanning Tree Protocol STP Quality of Service QOS Quality of ServiceBuilding Blocks QoS Profiles Profile Name Priority Minimum Bandwidth Maximum Bandwidth Vlan Permanent MAC addresses Dynamic MAC Addresses Or the command Command to clear the FDB is as followsVerifying MAC-Based QoS Settings Blackhole 802.1p Packets Config dot1p type dot1pvalue qosprofile qosnameEnable dot1p replacement ports portlist all Physical and Logical Groupings Source Port Verifying Physical and Logical Groupings Verifying Configuration Performance Displaying QoS Information QoS MonitorShow ports portlist qosmonitor Enable qosmonitor port port Disable qosmonitor Configuring QoS Quality of Service QOS Status Monitoring Statistics Show log priority Show log configShow switch Show memory To view port statistics, use the following command Port StatisticsAccuracy Port Errors To view port transmit errors, use the following commandTo view port receive errors, use the following command Port Monitoring Display KeysLogging Level Description Is specific to the problemWhere the following is true Clear log static To configure the log display, use the following command Configure remote logging by using the following commandReal-Time Display Disable log display Disable syslog Allows you to monitor LANs remotely Rmon features supported by the switchOn the network Clear Counters Alarms StatisticsHistory Allowing Proactive Management EventsImproving Efficiency Reducing the Traffic Load History Rmon Group Support Supplied by the Switch StatisticsAlarms Events Enable disable rmon Action High Threshold Status Monitoring and Statistics Using the WEB Interface Enabling Disabling Web AccessTo re-enable Web access, use the following command Setting Up Your Accessing the WebBrowser Navigating the Web Interface Task FrameWebserver busy Browser Controls Status MessagesSelection Type Key Sequence Configuring a Vlan Saving ChangesDo a Get When Using the WEB Interface Downloading a Software Upgrade and Boot OptionsSecondary image and configuration file on the switch New Image Rebooting the Switch SavingChanges Upgrading Software Upgrade and Boot Options Cancel option Boot OptionShow configuration Save configuration primary Software Upgrade and Boot Options Safety Information Important Safety Information Lithium Battery Appendix a Safety Information ’information de Sécurité Importante Appendix a Safety Information Batterie au lithium Wichtige Sicherheitsinformat ionen Europe Warnung Faseroptikanschlüsse Optische Sicherheit Lithiumbatterie Appendix a Safety Information Technical Specifications Protocols Used for Administration Terminal Emulation Troubleshooting LEDs Snmp Network Manager cannot access the device Using Command-Line InterfaceSwitch does not power up Telnet workstation cannot access the device Traps are not received by the Snmp Network Manager Permanent entries remain in the FDB You forget your password and cannot log Port Configuration No link light on 100/1000BASE-TX portExcessive RX CRC errors No link light on Gigabit fiber port VLANs You cannot add a port to a Vlan VLANs, IP Addresses and default routes Vlan names802.1Q links do not work correctly Using the Command-Line Interface Appendix C Troubleshooting Services Technical SupportOnline Technical Hours a day, 7 days a week Access by Analog ModemUsername anonymous Country Data Rate Telephone Number Access by Digital Modem 847 262408 727 Europe, South Africa, and Middle East Country Telephone Number Asia, Pacific Rim Country Telephone Number Fax Number Page Glossary Broadcast storm BridgeBroadcast Collision Glossary Line speed IP addressLatency Loop Port trunks See load sharing Router RepeaterResilient link Segment Standby port SwitchSwitch Database Telnet Glossary Admin IndexNumbers FDB Rmon Tftp Index Index Index of Commands 118 Index of Commands Index of Commands 3Com Corporation Limited Warranty Warranties Exclusive Governing LAW EMC Statements