Mixing Port-Based and Tagged VLANs | 3Com 9100 specification

72CHAPTER 4: VIRTUAL LANS (VLANS)

In Figure 10 and Figure 11:

■The trunk port on each switch carries traffic for both VLAN Marketing and VLAN Sales.

■The trunk port on each switch is tagged.

■The server connected to port 1 on Switch 1 has a NIC that supports 802.1Q tagging.

■The server connected to port 1 on Switch 1 is a member of both VLAN Marketing and VLAN Sales.

■All other stations use untagged traffic.

As data passes out of the switch, the switch determines if the destination port requires the frames to be tagged or untagged. All traffic coming from and going to the server is tagged. Traffic coming from and going to the trunk ports is tagged. The traffic that comes from and goes to the other stations on this network is not tagged.

Mixing Port-Based and Tagged VLANs

You can configure the switch using a combination of port-based and tagged VLANs. A given port can be a member of multiple VLANs, with the stipulation that only one of its VLANs uses untagged traffic. In other words, a port can simultaneously be a member of one port-based VLAN, one specific protocol-based VLAN, and multiple tag-based VLANs.

For the purposes of VLAN classification, packets arriving on a port with an 802.1Q tag containing a VLANid of zero are treated as untagged.

Protocol-Based VLANs Protocol-basedVLANs enable you to define a packet filter that the switch uses as the matching criteria to determine if a particular packet belongs to a particular VLAN.

Protocol-based VLANs are most often used in situations where network segments contain hosts running multiple protocols. For example, in Figure 12, the hosts are running both the IP and NetBIOS protocols.

The IP traffic has been divided into two IP subnets, 192.207.35.0 and 192.207.36.0. The subnets are internally routed by the switch. The subnets are assigned different VLAN names, Finance and Personnel, respectively. The remainder of the traffic belongs to the VLAN named MyCompany. All ports are members of the VLAN MyCompany.

Image 72

3Com 9100 manual Mixing Port-Based and Tagged VLANs

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 Conventions Icon DescriptionConvention Description Screen displays Related DocumentationYear Compliance About this Guide Switch 9100 Overview SwitchFeatures About Simple Network Management Protocol Snmp For information on load sharing, refer to Chapter Virtual LANs VLANs Configuration Quality of Service QoSNetwork Example Switch 9100 used in a backbone configuration Key Front panel has the following features ViewPorts Describes the LED behavior on the Switch LEDsStandard Media Type Mhz/Km Rating Maximum Distance 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 Power Sockets Reset ButtonSerial Number 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 Default Vlan named default Login adminLogging on for First Time Installation and Setup Accessing the Switch Accessing the Switch You could enter the following shortcut Be a range of numbers, for example Symbol Description Config vlan name ipaddress ipaddressConfig snmp community readonly readwrite string Reboot date time cancel Create account admin user username encrypted password Line-Editing Keys Command Description Disable bootp vlan name all Disable cli-config-loggingDisable clipaging Disable idletimeout Configuring Management Access Unconfig switch allShow banner 3C177052 Changing the Default Password Account Name Access Level3C1770519# Create account admin user username encrypted Viewing AccountsShow accounts Methods Managing Switch Using AccessProfiles Deleting an Account Config access-profile accessprofile Access Profile Example To view the contents of an access profile, type Using Telnet To view the Telnet configuration, typeConnecting to Another Host Using Telnet Using a Bootp Server Manually Configuring the IP Settings Config vlan name ipaddress ipaddress subnetmask Config iproute add default ipaddress metricFor example Your changes take effect immediately Terminate the session by using the following command Show sessionClear session sessionnumber Commands Using the WebOn the switch IP Host Using Snmp Accessing SwitchAgents Supported MIBs Enable Snmp access Enable Snmp traps Command Ping command syntax is Options for the ping command are described in TableChecking Basic Connectivity Switch 9100 Ports Configuring Switch Port Speed Duplex SettingEnabling Disabling Enable learning ports portlist Enable ports portlistEnable sharing masterport Config ports portlist qosprofile Disable learning ports portlist Disable ports portlistDisable sharing masterport Show ports portlist txerrors Accessing the Switch Enable sharing 4 grouping Configuration Port-MirroringVerifying the Load Sharing Commands Disable mirroringExample 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 Following protocol filters are predefined on the switch NetBIOS DECNet IPX8022Predefined Protocol Filters 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 Config fdb agingtime number Disable learning portsEntries 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 Protocol STP OverviewSpanning Tree 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 Configuring STP on the Switch Config stpd stpdname add vlan nameEnable stpd stpdname 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 Command to clear the FDB is as follows Verifying MAC-Based QoS SettingsOr the command Blackhole Config dot1p type dot1pvalue qosprofile qosname Enable dot1p replacement ports portlist all802.1p Packets 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 config Show switchShow log priority 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 Is specific to the problem Where the following is trueLevel Description 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 Rmon features supported by the switch On the networkAllows you to monitor LANs remotely Clear Counters Alarms StatisticsHistory Events Improving EfficiencyAllowing Proactive Management Reducing the Traffic Load Rmon Group Support Supplied by the Switch Statistics AlarmsHistory 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 Software Upgrade and Boot Options Secondary image and configuration file on the switchDownloading a New Image Rebooting the Switch SavingChanges Upgrading Software Upgrade and Boot Options Boot Option Show configurationCancel option 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 Using Command-Line Interface Switch does not power upSnmp Network Manager cannot access the device 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 Access by Analog Modem Username anonymousHours a day, 7 days a week 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 Bridge BroadcastBroadcast storm Collision Glossary IP address LatencyLine speed Loop Port trunks See load sharing Repeater Resilient linkRouter Segment Switch Switch DatabaseStandby port 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