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Allied Telesis AT-GS950/8 manual Guidelines for Creating a VLAN

Models: AT-GS950/8

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Chapter 6: VLANs

Guidelines for Creating a VLAN

member of the VLAN). These frames are untagged after transmission from the switch.

The following are guidelines for creating a VLAN.

Each VLAN must be assigned a unique VID. If a particular VLAN spans multiples switches, each part of the VLAN on the different switches should be assigned the same VID.

A port can be an untagged member of only one VLAN at a time and can receive both tagged and untagged packets.

If you want a port to be an untagged member of a different VLAN, you must first modify the VLAN (usually the default VLAN) where the port is an untagged member. First, delete that port from the original VLAN and then assign the port to another VLAN as an untagged port.

A VLAN that spans multiple switches requires a port on each switch where the VLAN is located to function as an interconnection between the switches where the various parts of the VLAN reside.

This port may be defined as an untagged member of a VLAN where the port is connected to another switch via another untagged port member of the VLAN. This means that all traffic on this inter-switch port contains traffic for that VLAN only.

Another scenario is where the port could be an untagged member of one VLAN and a tagged member of one or more VLANs. The port would then be connected to another switch via a port with the same VLAN membership. This means that the traffic on this inter-switch port is for any or all of the VLANs of which the port is a member.

If there are end nodes in different VLANs that need to communicate with each other, a router or Layer 3 switch is required to interconnect the VLANs.

The switch can support up to a total of 255 VLANs.

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Allied Telesis AT-GS950/8 manual Guidelines for Creating a VLAN

Contents

User’s Guide For the AT-GS950/8 Layer 2 Gigabit Ethernet WebSmart Switch VersionManagement Software AT-S82Copyright 2007 Allied Telesis, Inc Contents Tagged Port Members Figures Figures This preface contains the following sections Prefaceˆ “Where to Find Web-based Guides” on page ˆ “Contacting Allied Telesis” on pageWhere to Find Web-based Guides PrefaceContacting Allied Telesis Online Support Email and Telephone Support Warranty ReturningManagement Software Updates 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 Disabled EnabledDisabling or Enabling Ping Blocking Enabled Enabling or Disabling 802.1X Forwarding ControlDisabled 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 Chapter Port Configurationˆ “Configuring Port Parameters” on page This chapter contains the following sectionConfiguring Port Parameters Disabled Enabled3. From the State list, choose one of the following Enabled CopperFiber DisabledTrunking ChapterTrunking Overview Trunking Guidelines Trunking Algorithmˆ DAxorSA - destination MAC address/source MAC address distribution methods ˆ MAC-SA - source MAC addressˆ MAC-DA - destination MAC address AT-S82 Management Software User’s GuideMAC-DA Configuring the Trunking AlgorithmMAC-SA 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 MembersUntagged Port Members Incoming and Outgoing Tagged and Untagged FramesTagged 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 The box for the Primary ports should be empty 4. Click Apply Figure 21. Protected Port Page2. Determine which ports will be the Primary ports 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 QueuePackets Port Egress QueueMaximum Number of 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 BridgeBridge Path Costs and Port CostsIncrement PriorityPort Speed Port SpeedPort Cost Port CostPort Forwarding Delay and Topology ChangesPort Priority 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 When you select a value for maximum age, observe the following rules RSTPSTP Compatible EnabledDisabled Enabled Configuring STP Port SettingsDisabled Auto FalseTrue FalseChapter 8 Spanning Tree Protocol STP