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Allied Telesis AT-GS950/8 manual VLAN Overview, VLAN Identifier VLAN Port Members

Models: AT-GS950/8

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VLAN Overview

Chapter 6: VLANs

VLAN Overview

This VLAN overview contains the following sections:

“VLAN Name,” next

“VLAN Identifier” on page 44

“VLAN Port Members” on page 44

“Incoming and Outgoing Tagged and Untagged Frames” on page 45

“Guidelines for Creating a VLAN” on page 46

VLAN Name To create a port-based VLAN, you must give it a name. The name should reflect the function of the network devices that are be members of the VLAN. Examples include Sales, Production, and Engineering.

VLAN Identifier

VLAN Port

Members

Every VLAN in a network must have a unique number assigned to it. This number is called the VLAN identifier (VID). This number uniquely identifies a VLAN in the switch and the network. The factory default VID is 1 for all ports.

If a VLAN consists only of ports located on one physical switch in your network, you assign it a VID different from all other VLANs in your network.

If a VLAN spans multiple switches, then the VID for the VLAN on the different switches should be the same. The switches are then able to recognize and forward frames belonging to the same VLAN even though the VLAN spans multiple switches.

For example, if you had a VLAN titled Marketing that spanned three AT-GS950/8 switches, you would assign the Marketing VLAN on each switch the same VID.

You need to specify which ports on the switch are to be members of a VLAN. A port can be specified as a member of one or more VLANs up to 255, the maximum number of VLANs supported by the switch. The factory default VID is 1. Therefore, each port is initially configured to be a member of VLAN 1, which is known as the default VLAN.

Note

The switch is preconfigured with the Default VLAN only. All ports on the switch are initially members of the Default VLAN.

If a port is assigned to be a new member of a VLAN, its membership can be defined as either tagged or untagged.

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Allied Telesis AT-GS950/8 manual VLAN Overview, VLAN Identifier VLAN Port Members

Contents

For the AT-GS950/8 Layer 2 Gigabit Ethernet WebSmart Switch Version Management SoftwareUser’s Guide AT-S82Copyright 2007 Allied Telesis, Inc Contents Tagged Port Members Figures Figures Preface ˆ “Where to Find Web-based Guides” on pageThis preface contains the following sections ˆ “Contacting Allied Telesis” on pageWhere to Find Web-based Guides PrefaceOnline Support Email and Telephone Support Warranty Returning Management Software UpdatesContacting Allied Telesis Products Sales or Corporate InformationPreface Getting Started ChapterStarting a Management Session Figure 2. Main Page AT-S82 Management Software User’s GuideSaving Changes Quitting a Management Session To quit a management session, close the web browserChapter 1 Getting Started Basic Switch Parameters ChapterTo set the switch’s IP configuration, perform the following procedure a. In the IP Address field, enter the IP address. The default is Disabling or Enabling Ping Blocking EnabledDisabled Disabled Enabling or Disabling 802.1X Forwarding ControlEnabled Changing the Administrator’s Password Rebooting the Switch Resetting the Switch and Retaining the IP Address Figure 8. Reset System Page 2. Click Apply Downloading New Firmware Port Configuration ˆ “Configuring Port Parameters” on pageChapter This chapter contains the following sectionConfiguring Port Parameters 3. From the State list, choose one of the following EnabledDisabled Copper FiberEnabled DisabledTrunking ChapterTrunking Overview Trunking Guidelines Trunking Algorithmdistribution methods ˆ MAC-SA - source MAC address ˆ MAC-DA - destination MAC addressˆ DAxorSA - destination MAC address/source MAC address AT-S82 Management Software User’s GuideConfiguring the Trunking Algorithm MAC-SAMAC-DA DAxorSASetting up the Trunk 5. Click Apply to implement your changes Port Mirroring ChapterPort Mirroring Overview Configuring Port Mirroring Chapter 5 Port Mirroring VLANs ChapterVLAN Features Increased Performance Improved Manageability Increased SecurityAT-S82 Management Software User’s Guide VLAN Overview VLAN Identifier VLAN Port MembersIncoming and Outgoing Tagged and Untagged Frames Tagged Port MembersUntagged Port Members Incoming FramesGuidelines for Creating a VLAN Working with VLANs Displaying all VLANs 2. Click Show All Static VLAN EntriesModifying a VLAN Deleting a VLAN Protected Ports VLAN Figure 21. Protected Port Page 2. Determine which ports will be the Primary portsThe box for the Primary ports should be empty 4. Click Apply AT-S82 Management Software User’s GuideChapter 6 VLANs Class of Service ChapterClass of Service Overview Mapping Ports to Egress QueuesIEEE 802.1p Priority Level Port Priority QueuePort Egress Queue Maximum Number ofPackets exampleMapping Priorities to Queues Setting Up the Schedule Assigning Priority to Ports Chapter 7 Class of Service Spanning Tree Protocol STP ChapterSpanning Tree Overview Bridge Priority and the Root BridgePath Costs and Port Costs IncrementBridge PriorityPort Speed Port CostPort Speed Port CostForwarding Delay and Topology Changes Port PriorityPort Port SpeedHello Time and Bridge Protocol Data Units BPDUs Point-to-Point and Edge Ports Figure 26. Edge Port Spanning Tree and VLANs Chapter 8 Spanning Tree Protocol STP Configuring Spanning Tree RSTP STP CompatibleWhen you select a value for maximum age, observe the following rules EnabledDisabled Disabled Configuring STP Port SettingsEnabled False TrueAuto FalseChapter 8 Spanning Tree Protocol STP