SMC Networks 48-Port manual Making Vlan Connections

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NETWORK PLANNING

Making VLAN Connections

VLANs can be based on port groups, or each data frame can be explicitly tagged to identify the VLAN group it belongs to. When using port-based VLANs, ports can either be assigned to any number of groups. Port-based VLANs are suitable for small networks. A single switch can be easily configured to support several VLAN groups for various organizational entities (such as Finance and Marketing).

When you expand port-based VLANs across several switches, you need to make a separate connection for each VLAN group. This approach is, however, inconsistent with the Spanning Tree Protocol, which can easily segregate ports that belong to the same VLAN. When VLANs cross separate switches, it is therefore better to use VLAN tagging. This allows you to assign multiple VLAN groups to the “trunk” ports (that is, tagged ports) connecting different switches.

R&D

VLAN 1

Tagged

Ports

Finance

VLAN 2

Testing

VLAN 3

VLAN 4

Untagged Ports

Tagged Port

VLAN

unaware

switch

Marketing

Finance

VLAN 3

VLAN aware switch

R&D

Testing

VLAN 1

VLAN 2

Figure 2-4. Making VLAN Connections

Note: When connecting to a switch that does not support IEEE 802.1Q VLAN tags, use untagged ports.

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Contents TigerSwitch 10/100 Page TigerSwitch 10/100 Installation Guide Trademarks Limited Warranty Limited Warranty EC Conformance Declaration Class a CompliancesFCC Class a Industry Canada Class a Iii Safety ComplianceWarnhinweis Faseroptikanschlüsse Optische Sicherheit Underwriters Laboratories Compliance StatementWichtige Sicherheitshinweise Germany Table of Contents Making Network Connections Installing the SwitchTroubleshooting A-1 Cables B-1 Specifications C-1Ordering Information D-1 Glossary Index ViiViii Overview Chapter About Tigerswitch 10/100Rear Panel Switch Architecture10BASE-T/100BASE-TX Ports SMC6948L2 Description of HardwareManagement Options LED Status LEDsNetwork Management Module Network Management ModuleVLANs Spanning Tree ProtocolTraffic Priority Multicast SwitchingOptional Media Extender Modules Power Supply Receptacles Optional Redundant Power Unit SMCRPU150WExpandability Features and BenefitsConnectivity Management PerformanceChapter Network Planning Introduction to Switching Collapsed Backbone Sample ApplicationsCentral Wiring Closet Central Wiring ClosetRemote Connections with Fiber Cable Collapsed Backbone Using Fiber CableMaking Vlan Connections Making Vlan ConnectionsMaximum Fiber Optic Cable Distance for 1000BASE-SX Connectivity RulesMbps Gigabit Ethernet Collision Domain Mbps Fast Ethernet Collision Domain Maximum Network Diameter Using RepeatersSMC 3-2 Rule for Class II Repeaters SMC 2-1 Rule for Class I RepeatersMaximum Ethernet Cable Distance Mbps Ethernet Collision DomainSMC 5-4-3 Rule Application Notes Network Planning Selecting a Site Installing the SwitchOptional Rack-Mounting Equipment Equipment ChecklistPackage Contents Rack Mounting MountingAttaching the Brackets Attaching the Adhesive Feet Desktop or Shelf MountingPower Receptacle Connecting to a Power SourceChapter Making Network Connections Connecting Network Devices1. Making Twisted-Pair Connections Connecting to PCs, Servers, Hubs and SwitchesWiring Closet Connections Wiring Closet ConnectionsFiber Optic Devices Making SC Port Connections Making Network Connections Diagnosing Switch Indicators Appendix a TroubleshootingIn-Band Access Power and Cooling ProblemsInstallation Troubleshooting Troubleshooting Appendix B Cables SpecificationsTwisted-Pair Cable and Pin Assignments Figure B-1. RJ-45 Connector Pin Numbers100BASE-TX/10BASE-T Pin Assignments Straight-Through WiringCrossover Wiring Figure B-2. DB-9 Console Port Pin Numbers Console Port Pin AssignmentsConsole Port to 25-Pin DCE Port on Modem DB-9 Port Pin AssignmentsConsole Port to 9-Pin COM Port on PC Console Port to 25-Pin DTE Port on PC Cables Physical Characteristics Appendix C SpecificationsTemperature WeightPower Supply Power ConsumptionSwitch Features Management Features Standards SafetyCompliances EmissionsWarranty 100BASE-FX Extender Module Slide-in Module1000BASE-SX Extender Module ModelSMC6948NMM Appendix D Ordering Information Ordering Information Glossary-1 GlossaryAuto-Negotiation BandwidthGlossary-2 Glossary-3 Glossary-4 Glossary-5 Glossary-6 Index-1 IndexIndex-2 See RPU Index-3Index-4 Page Internet