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Cabletron Systems 802.1Q VLAN User Manual

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802.1Q VLAN
User's Guide
9032599-02

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Summary of Contents for Cabletron Systems 802.1Q VLAN

  • Page 1 802.1Q VLAN User’s Guide 9032599-02...
  • Page 3 NOTICE Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made. The hardware, firmware, or software described in this manual is subject to change without notice.
  • Page 4 Notice 802.1Q VLAN User’s Guide...

  • Page 5: Table Of Contents

    Document Conventions ...x CHAPTER 1 VIRTUAL LOCAL AREA NETWORKS Defining VLANs ... 1-1 Types of VLANs... 1-3 1.2.1 802.1Q VLANs ... 1-3 1.2.2 SecureFast VLANs ... 1-3 1.2.3 Other VLAN Strategies ... 1-3 Benefits and Restrictions... 1-4 VLAN Terms ... 1-4 Getting Help...
  • Page 6 Switch Without VLANs ...3-1 3.1.2 Switch with VLANs ...3-2 Summary of VLAN Local Management...3-4 3.2.1 Preparing for VLAN Configuration...3-4 802.1Q VLAN Configuration Menu Screen ...3-5 Device VLAN Configuration Screen ...3-8 3.4.1 Defining a VLAN...3-10 3.4.2 Changing the VLAN to FID Association ...3-11 3.4.3...
  • Page 7 Example 2, VLANs Across Multiple Switches... 4-4 4.2.1 Solving the Problem... 4-5 4.2.2 Frame Handling ... 4-8 Example 3, 1D Trunk Connection to 802.1Q VLAN Network ... 4-10 4.3.1 Solving the Problem... 4-12 4.3.2 Frame Handling ... 4-13 Example 4, Isolating Network Traffic According to Protocol... 4-17 4.4.1...
  • Page 8 Contents 802.1Q VLAN User’s Guide...

  • Page 9: Figures

    Bridge 1 Broadcasts Frames... 4-8 Transmitting to Switch 4 ... 4-9 Transmitting to Bridge 4 ... 4-10 Example 3, 1D Trunk Connection to 802.1Q VLAN Network . 4-11 Bridge 1 Broadcasts Frames... 4-14 Switch 2 Forwards to 1Q Trunk... 4-15 4-10 Switch 1 Forwards to 1D Trunk ...
  • Page 10 Table 802.1Q VLAN Configuration Menu Screen Menu Items ... 3-7 Device VLAN Configuration Screen Field Definitions ... 3-9 Port Assignment Configuration Screen Field Definitions... 3-15 Port Filtering Configuration Screen Field Definitions ... 3-19 VLAN Forwarding Configuration Screen Field Definitions ... 3-22 Protocol VLAN Configuration Screen Field Definitions ...

  • Page 11: Preface

    Chapter VLAN Operation, describes the operation of an 802.1Q VLAN, the steps necessary to prepare an 802.1Q VLAN aware switch for VLAN operation, and examines the operation of an 802.1Q VLAN switch. Chapter VLAN Configuration, describes how to set up the switch for...

  • Page 12: Related Documents

    Other Cabletron Systems documents that may be useful for understanding some of the concepts introduced or discussed in this guide are listed below: The SmartSwitch user’s guide of any Cabletron Systems 802.1Q VLAN aware SmartSwitch device. The manual can be obtained from the World Wide Web in Adobe Acrobat Portable Document Format (PDF) at the following site: http://www.cabletron.com/...

  • Page 13: Chapter 1 Virtual Local Area Networks

    VIRTUAL LOCAL AREA NETWORKS This chapter introduces the concepts of Virtual Local Area Networks (VLANs) and discusses the central concepts of IEEE 802.1Q VLANs. This chapter also contains information on how to contact Cabletron Systems for additional support related to VLANs.
  • Page 14 Sales VLAN, cross the high speed link to SmartSwitch B, and then be sent to any other ports and workstations on SmartSwitch B that are members of the Sales VLAN. 802.1Q VLAN User’s Guide...

  • Page 15: Types Of Vlans

    1.2.1 802.1Q VLANs An 802.1Q VLAN switch determines the VLAN membership of a data frame by its Tag Header, described later in this chapter. If the frame received is not tagged, the switch classifies the frame into the VLAN that is assigned as the default VLAN of the switch.

  • Page 16: Benefits And Restrictions

    Chapter 1: Virtual Local Area Networks BENEFITS AND RESTRICTIONS The primary benefit of the 802.1Q VLAN technology is that it provides localization of traffic. This function also offers improvements in security and performance to stations assigned to a VLAN. While the localization of traffic to VLANs can improve security and performance, it imposes some restrictions on network devices that participate in the VLAN.
  • Page 17 1Q Trunk A connection between 802.1Q switches that passes only traffic with a VLAN Tag Header inserted in the frame. By default, a port designated as a 1Q Trunk port has all VLANs in its Port VLAN List and is configured to transmit all frames as tagged frames.
  • Page 18 A GARP application used to dynamically create VLANs across a switched network. GARP Multicast Registration Protocol (GMRP) A GARP application that functions in a similar fashion as GVRP, except that GMRP registers multicast addresses on ports to control the flooding of multicast frames. 802.1Q VLAN User’s Guide...

  • Page 19: Getting Help

    A description of any action(s) already taken to resolve the problem (e.g., changing mode switches, rebooting the unit, etc.) • The serial and revision numbers of all involved Cabletron Systems products in the network • A description of your network environment (layout, cable type, etc.) •...
  • Page 20 Chapter 1: Virtual Local Area Networks 802.1Q VLAN User’s Guide...

  • Page 21: Vlan Operation

    VLAN COMPONENTS Before describing the operation of an 802.1Q VLAN, it is important to understand the basic elements that are combined to make up an 802.1Q VLAN.

  • Page 22: Configuration Process

    Before a VLAN can operate, steps must be performed to configure the switch to establish and configure a VLAN. Cabletron Systems VLAN aware SmartSwitches default to operate in the 802.1Q VLAN mode. However, further configuration is necessary to establish multiple logical networks.

  • Page 23: Customizing The Vlan Forwarding List

    VLAN depends upon the configuration of the switch port that received the frame. The operation of an 802.1Q VLAN switch is best understood from a point of view of the switch itself. To illustrate this concept, the examples that follow view the switch operations from inside the switch.

  • Page 24: Receiving Frames From Vlan Ports

    Port 4 2.4.1 Receiving Frames from VLAN Ports When a switch is placed in 802.1Q Operational Mode, every frame received by the switch must belong, or be assigned, to a VLAN. Untagged Frames The switch receives a frame from Port 1 and examines the frame. The switch notices that this frame does not currently have a VLAN tag.

  • Page 25: Forwarding Decisions

    Unicasts If a frame with a broadcast, multicast, or other unknown address is received by an 802.1Q VLAN aware switch, the switch checks the VLAN classification of the frame. The switch then forwards the frame out all ports that are identified in the Forwarding List for that VLAN. For example, if Port 3, shown in would then be sent to all ports that had VLAN C in their Port VLAN List.

  • Page 26: Garp Switch Operation

    Some or all ports on the switch may be activated to operate under the Generic Attribute Registration Protocol (GARP) applications, GVRP and/or GMRP. For a description of the protocols and how the frames are handled, refer to the user’s guide of your SmartSwitch device. 802.1Q VLAN User’s Guide...

  • Page 27: Chapter 3 Vlan Configuration

    NOTE: All ports, including the virtual Host Data Port, are members of the default VLAN. Therefore, any station shown may be used as the management station. Figure 3-1 Switch Management with Only Default VLAN 802.1Q VLAN User’s Guide CHAPTER 3 3-1. 802.1Q Switch...

  • Page 28: Switch With Vlans

    Management VLAN VLAN A VLAN A Set as an 802.1Q Trunk port. Figure 3-2 Switch Management with VLANs To set up the switch shown in VLAN on port 1, use the process described below: Use the Device VLAN Configuration screen for the following: Define a new VLAN named “Management VLAN”...
  • Page 29 No matter how many switches are connected, a management station connected to any port on the same Management VLAN can be used to remotely manage any Cabletron Systems 802.1Q switch in the network as long as the Host Data Port of all the switches are members of the same Management VLAN.

  • Page 30: Summary Of Vlan Local Management

    A switch supporting 802.1Q VLANs provides the VLAN Configuration screens as a standard part of its Local Management hierarchy when the switch is configured to operate in 802.1Q Mode. The hierarchy of the Local Management screens pertaining to 802.1Q VLAN configuration is...

  • Page 31: 802.1Q Vlan Configuration Menu Screen

    Network users can be logically grouped into VLANs even if they span long physical distances over a vast, intricate physical network. The VLAN Local Management menu items listed on the 802.1Q VLAN Configuration Menu allow such VLANs to be configured on a network at the switched port of the device or SmartSwitch chassis.

  • Page 32: How To Access

    Chapter 3: VLAN Configuration How to Access Use the arrow keys to highlight the 802.1Q VLAN CONFIGURATION MENU item from the module, device, or chassis specific Configuration Menu screen and press ENTER. The 802.1Q VLAN Configuration Menu screen displays. Screen Example...
  • Page 33 Menu Definitions Table 3-1 802.1Q VLAN Configuration Menu Screen Menu Items Menu Item Screen Function DEVICE VLAN Used to view, add, name, enable, or disable VLANs CONFIGURATION within the device, and also associate the VLANs to a Filter Database ID (FID). It also enables the user to configure attributes that apply to the entire switch and/or...

  • Page 34: Device Vlan Configuration Screen

    VLANs, and assign VLANs to FIDs. The screen can display up to eight VLANs simultaneously. How to Access Use the arrow keys to highlight the DEVICE VLAN CONFIGURATION menu item on the 802.1Q VLAN Configuration Menu screen and press ENTER. The Device VLAN Configuration screen displays. Screen Example...
  • Page 35 VLAN, and is not required for VLAN operation. (Modifiable) ADD/DEL Toggle the action taken between adding the entered VLAN (Toggle) to the switch or deleting the selected VLAN from the switch. 802.1Q VLAN User’s Guide Device VLAN Configuration Screen...

  • Page 36: Defining A Vlan

    The VLAN will not be saved to the switch until the configuration is saved. Use the arrow keys to highlight the SAVE command at the bottom of the screen. Press ENTER. The message “SAVED OK” displays. 3-10 step 802.1Q VLAN User’s Guide...

  • Page 37: Changing The Vlan To Fid Association

    “VLAN # UPDATED”, where # represents the entered VLAN name. Use the arrow keys to highlight the SAVE command at the bottom of the screen. Press ENTER. The message “SAVED OK” displays. 802.1Q VLAN User’s Guide Device VLAN Configuration Screen 3-11...

  • Page 38: Deleting A Vlan

    Use the arrow keys to highlight the Admin Status field of the selected VLAN. Press the SPACE bar to toggle the field to display Disabled. Use the arrow keys to highlight the SAVE command at the bottom of the screen. 3-12 802.1Q VLAN User’s Guide...

  • Page 39: Changing The Forwarding Mode

    Press ENTER to view the entries on the next screen. To display the previous screen, use the arrow keys to highlight PREVIOUS. Press ENTER to view the entries on the previous screen. 802.1Q VLAN User’s Guide Device VLAN Configuration Screen 3-13...

  • Page 40: Port Assignment Configuration Screen

    To select a mode of operation for each port and to assign a Port VLAN Identification (PVID) to each port. How to Access Use the arrow keys to highlight the PORT ASSIGNMENT CONFIGURATION menu item on the 802.1Q VLAN Configuration Menu screen and press ENTER. The Port Assignment Configuration screen displays. Screen Example...

  • Page 41: Changing The Port Mode

    Any other VLANs desired for the Port VLAN List need to be manually configured. By changing the default mode to 1Q Trunk or 1D Trunk, the Port VLAN List and the associated frame type are automatically configured. 802.1Q VLAN User’s Guide Port Assignment Configuration Screen 3-15...

  • Page 42: Assigning A Vlan Id

    “Forward Default VLAN Out All Ports” parameter and the Default VLAN to allow all stations on a legacy portion of the network to access all stations or servers in the 802.1Q portion of the network. When the desired operational mode for the port is displayed, use the arrow keys to highlight the SAVE command at the bottom of the screen.

  • Page 43: Paging Through The Port List

    Filter out certain incoming frames according to the VLAN List and prevent them from being switched and transmitted out another port. • Filter out of all incoming untagged frames so they will not be transmitted out another port. 802.1Q VLAN User’s Guide Port Filtering Configuration Screen 3-17...
  • Page 44 Chapter 3: VLAN Configuration How to Access Use the arrow keys to highlight the PORT FILTERING CONFIGURATION menu item on the 802.1Q VLAN Configuration Menu screen and press ENTER. The Port Filtering Configuration screen displays. Screen Example Module Type: xxxxx-xx...

  • Page 45: Displaying Vlan Ids Associated With A Port

    Port VLAN List. To display additional VLANs that do not display in the current screen display, use the NEXT or PREVIOUS commands located at the bottom of the screen, as follows: 802.1Q VLAN User’s Guide Port Filtering Configuration Screen 3-19...

  • Page 46: Selecting The Type Of Filtering For A Port

    VLAN tag header. The default is NO. To save the settings, Use the arrow keys to highlight the SAVE command at the bottom of the screen. Press ENTER. The message “SAVED OK” displays. The settings are saved. 3-20 802.1Q VLAN User’s Guide...

  • Page 47: Vlan Forwarding Configuration Screen

    Specify the formats of the frames (Tagged or Untagged) that a VLAN port will forward. How to Access Use the arrow keys to highlight the VLAN FORWARDING CONFIGURATION menu item on the 802.1Q VLAN Configuration Menu screen and press ENTER. The VLAN Forwarding Configuration screen displays. Screen Example...

  • Page 48: Viewing Current Vlan Ports

    Use the arrow keys to highlight the VLAN ID field. Use the SPACE bar or BACKSPACE to step to the desired VLAN ID and VLAN Name. Press ENTER. The screen updates to display the VLAN Forwarding List for the selected VLAN. 3-22 Section 3-8, ATM PVC VCI-1 802.1Q VLAN User’s Guide...

  • Page 49: Paging Through Vlan Forwarding List Entries

    Use the arrow keys to highlight the VLAN ID field. Use the SPACE bar or BACKSPACE to step to the desired VLAN ID and VLAN Name. Press ENTER. 802.1Q VLAN User’s Guide VLAN Forwarding Configuration Screen 3-23...

  • Page 50: Changing The Frame Format

    VLAN identifier within the frame. Entries may also be deleted or modified. When the frame is transmitted, it is sent to the ports associated with the VLAN ID as established using the Protocol Port Configuration screen. 3-24 802.1Q VLAN User’s Guide...
  • Page 51 How to Access Use the arrow keys to highlight the PROTOCOL VLAN CONFIGURATION menu item on the 802.1Q VLAN Configuration Menu screen and press ENTER. The Protocol VLAN Configuration screen displays. Screen Example Module Type: xxxx-xx Slot Number: xx VLAN ID...
  • Page 52 Priority Ports Configuration screen described in Section ID and Protocol Type will change from ALL PORTS or NO PORTS to USER DEFINED PORT LIST in the Protocol Priority Configuration screen 3-26 Section 3.8.2. 3.9, the Configured Ports for the particular VLAN 802.1Q VLAN User’s Guide...
  • Page 53 (for example, Priority [0] and Protocol Type [Banyan Vines]). DELETE – deletes an existing entry with the associated priority (for example, Priority [0] and Protocol Type [Banyan Vines]). 802.1Q VLAN User’s Guide Protocol VLAN Configuration Screen Section 3.8.1. 3-27...

  • Page 54: Displaying The Current Protocol, Vlan Id, And Port Assignments

    10 with VID of 5 and IP is configured on port 10 with VID of 6, the incoming frame will receive the VID 5 as Ether Types have priority over “Protocol Family”. 3-28 3.8.2. 802.1Q VLAN User’s Guide...
  • Page 55 Use the arrow keys to highlight the Configure Ports field near the bottom of the screen. Press the SPACE bar to toggle the field to apply the VLAN ID and Protocol Type entries to either ALL PORTS or NO PORTS. 802.1Q VLAN User’s Guide Protocol VLAN Configuration Screen 3-29...

  • Page 56: Displaying The Protocol Types On Current Ports

    Press ENTER. The Protocol Ports Configuration screen displays, showing all current ports and port types associated with that VLAN ID. For more information about the Protocol Ports Configuration screen and how to use it, refer to 3-30 Section 3.9. 802.1Q VLAN User’s Guide...

  • Page 57: Protocol Ports Configuration Screen

    VLAN ID : 1 Protocol: 0X800 ATM PVC VCI-1 VPI-23 Port: [ 31] SAVE PREVIOUS Figure 3-10 Protocol Ports Configuration Screen 802.1Q VLAN User’s Guide Protocol Ports Configuration Screen 6C105 LOCAL MANAGEMENT Protocol Ports Configuration Firmware Revision: BOOTPROM Revision: XX.XX.XX Port Type...
  • Page 58 DELETE ALL PORTS – deletes ALL PORTS that are configurable from the VLAN ID shown in the VLAN ID field. 3-32 Figure 3-10, the priority is “0”. The selections are as Figure 3-10, the port is 31 and 802.1Q VLAN User’s Guide...

  • Page 59: Adding/Deleting Ports Associated With A Vlan Id

    NOTE different from those shown in the illustrations for this walkthrough. On the 802.1Q VLAN Configuration Menu screen, use the arrow keys to highlight the DEVICE VLAN CONFIGURATION menu item. Press ENTER. The Device VLAN Configuration screen displays. In this walkthrough, we will not change the setting of the Forward Default VLAN Out All Ports fields from their default setting of NO.
  • Page 60 This new VLAN is currently disabled, as the DISABLED field to NOTE the far right shows. When all the rules and settings for the VLAN are in place, it will be necessary to return to this screen and enable the VLAN. 3-34 802.1Q VLAN User’s Guide...
  • Page 61 It is now time to assign a port to this new VLAN. Use the arrow keys to highlight the RETURN command at the bottom of the screen. Press ENTER. The 802.1Q VLAN Configuration Menu screen displays. Use the arrow keys to select the PORT ASSIGNMENT CONFIGURATION menu item and press ENTER.
  • Page 62 0001 Default VLAN [0001] 0001 Default VLAN [0001] 0001 Default VLAN [0001] 0001 Default VLAN [0001] 0001 Default VLAN [0001] 0001 Default VLAN PREVIOUS NEXT Firmware Revision: XX.XX.XX BOOTPROM Revision: XX.XX.XX VLAN Name EXIT RETURN 802.1Q VLAN User’s Guide 25992-10...
  • Page 63 SAVE Figure 3-13 Walkthrough Stage Three Now that the TEST VLAN and the 1Q Trunk connection are set up, we can proceed to activate the TEST VLAN. 802.1Q VLAN User’s Guide 6C105 LOCAL MANAGEMENT Port Assignment Configuration VLAN ID DEFAULT VLAN...
  • Page 64 Chapter 3: VLAN Configuration On the 802.1Q VLAN Main Menu screen, use the arrow keys to highlight the DEVICE VLAN CONFIGURATION menu item. Press ENTER. The Device VLAN Configuration screen, displays. Module Type: xxxxx-xx Slot Number: xx VLAN ID VLAN ID: 1...
  • Page 65 In this walkthrough, we will show how to display the Port VLAN List of port 10 and set the port to filter out all untagged frames that it receives. On the 802.1Q VLAN Main Menu screen, use the arrow keys to highlight the PORT FILTERING CONFIGURATION menu item.
  • Page 66 filtering of all untagged frames. 3-40 6C105 LOCAL MANAGEMENT Port Filtering Configuration Firmware Revision: BOOTPROM Revision: XX.XX.XX Filter Using VLAN Lists: [NO] Filter All Untagged Frames: [YES] NEXT 802.1Q VLAN User’s Guide XX.XX.XX RETURN EXIT 25992-20...

  • Page 67: Chapter 4 Examples

    (B1, B2, B3) are to be kept completely separate from the red users (R1, R2, R3). Figure 4-1 shows the initial state of the switch. Figure 4-1 Example 1, Single Switch Operation 802.1Q VLAN User’s Guide CHAPTER 4 EXAMPLES Chapter VLAN Configuration.

  • Page 68: Solving The Problem

    VLANs and how users are assigned to them. First, the switch is set for 802.1Q operation. Since traffic isolation is to be based on VLAN membership alone, the switch is set so the Red VLAN is a member of FID 2 and the Blue VLAN is a member of FID 3 from the Device/VLAN Configuration screen.

  • Page 69: Frame Handling

    Table for the destination MAC address given in the frame. The switch finds the MAC address and VLAN in this table, and recognizes that the MAC address and VLAN match for R1 is located out Port 1. 802.1Q VLAN User’s Guide Example 1, Single Switch Operation...

  • Page 70: Example 2, Vlans Across Multiple Switches

    EXAMPLE 2, VLANS ACROSS MULTIPLE SWITCHES This second example investigates the steps that must be taken to set up VLANs across multiple 802.1Q VLAN switches. This includes the configuration and operation of 1Q Trunks between 802.1Q VLAN switches. As shown in Figure 4-3, two companies, “Redco”...

  • Page 71: Solving The Problem

    The following information shows how Switch 4 and Switch 2 are configured to create the two VLANs to isolate the users of the two companies from one another on the network using the existing infrastructure. 802.1Q VLAN User’s Guide Example 2, VLANs Across Multiple Switches Blue Industries Red VLAN...
  • Page 72 • Port Mode: 1Q Trunk Port 4 is set as an 802.1Q Trunk port, which makes the port eligible to transmit to all VLANs, and all frames forwarded out this port are forwarded as tagged frames. By default there is no PVID associated with the trunk port and the port remains as a member of the Default VLAN.
  • Page 73 • Port 2, Port Mode: 1Q Trunk Port 2 is set as an 802.1Q Trunk port, which makes its Port VLAN List contain all VLANs and sets all frames forwarded out this port as tagged frames. This completes the transmission path between Switch 4 and Switch 2.

  • Page 74: Frame Handling

    The VLAN Tag Header indicates that the frame is classified as belonging to the Red VLAN. taken to this point to reach Switch 2. Blue Industries Bridge 2 Blue VLAN Blue VLAN Figure 4-5 802.1Q VLAN User’s Guide Figure 4-4. 2263_14 shows the path...
  • Page 75 The VLAN Tag Header is inserted because Switch 4, Port 4 is designated as an 802.1Q Trunk port. In this case, the Port Mode setting for Port 4 is 802.1Q Trunk and the VLAN Frame format for that VLAN is tagged.

  • Page 76: Example 3, 1D Trunk Connection To 802.1Q Vlan Network

    User A. The 802.1D switches update their Source Address Tables based on the source MAC address and receive port and the 802.1Q switches update their databases based on the source MAC address, VLAN, and receive port.
  • Page 77 Floor 1 User 802.1D Legacy Bridge Figure 4-7 Example 3, 1D Trunk Connection to 802.1Q VLAN Network The Green Incorporated Network Administrators want to continue to separate normal network traffic between the Blue and Red VLANs, and create a new isolated VLAN for Green, Incorporated users. All divisions in the facility are to have equal access to the Mail Server on the first floor.

  • Page 78: Solving The Problem

    • Port 4, Port Mode: 1Q Trunk This causes Port 4 to be set as an additional 802.1Q Trunk port, which makes its Port VLAN List contain all VLANs, and all frames forwarded out this port are forwarded as tagged frames.

  • Page 79: Frame Handling

    Port 2, Port Mode: 1Q Trunk • Port 3, Port Mode: 1D Trunk Port 2 is set as an 802.1Q Trunk port, which makes the port eligible to transmit frames of all VLANs, and sets all frames forwarded out this port as tagged frames.
  • Page 80 Bridge 4 as a normal broadcast frame. The frame that is transmitted out Port 4, the 1Q Trunk, retains its VLAN tag. 4-14 Figure Bridge 2 Blue VLAN Blue VLAN 802.1Q VLAN User’s Guide 4-8. 2263_18...
  • Page 81 Example 3, 1D Trunk Connection to 802.1Q VLAN Network Floor 3 Bridge 3 Blue VLAN Blue VLAN Floor 2 Figure 4-9 Switch 2 Forwards to 1Q Trunk When Switch 1 receives the tagged broadcast frame, it also examines the tag and classifies the frame as belonging to the Red VLAN. This broadcast frame is then sent to all ports eligible to receive Red VLAN frames.
  • Page 82 Address Table is updated with an entry for the Mail Server’s MAC address. User B receives the Mail Server’s response. Any further unicast traffic between the Mail Server and User B will be handled in the same fashion by the switches in the network. 4-16 802.1Q VLAN User’s Guide...

  • Page 83: Example 4, Isolating Network Traffic According To Protocol

    A second VLAN (Yellow VLAN) will be established to handle traffic of other protocols. The Publications Department users will have access to the mail server on the first floor along with the Red, Blue, and Green VLANs. 802.1Q VLAN User’s Guide Figure 4-7, the Publications Department is 4-17...

  • Page 84: Solving The Problem

    Solving the Problem Much of the existing network configuration can remain as it was for Example 3, 1D Trunk Connection to 802.1Q VLAN Switch 3, Switch 5, and the devices that will make up Publication’s Grey VLAN have been added.
  • Page 85 • Port 4, Port Mode: 1Q Trunk Ports 2, and 4 are set as 802.1Q Trunk ports, which makes these ports eligible to transmit frames of all VLANs, and sets all frames forwarded out these ports as tagged frames. This allows traffic from Switch 4 to reach Switch 2 on the network backbone.
  • Page 86 Grey VLAN is assigned to the AppleTalk protocol. • VLAN ID 6, Protocol Type: AppleTalk, Status: ADD This creates the protocol VLAN ID 6 that will handle only AppleTalk frames and enables ports to be assigned the this VLAN. 4-20 802.1Q VLAN User’s Guide...
  • Page 87 Yellow VLAN are transmitted to the correct device. Any broadcast frames received via Port 1 are transmitted to all the devices in the Yellow VLAN and handled in a similar manner as previously described in Example 2. 802.1Q VLAN User’s Guide 4-21...
  • Page 88 Chapter 4: Examples 4-22 802.1Q VLAN User’s Guide...
  • Page 89 Filtering Database 1-5 Filtering Database ID 1-4 Forwarding list 1-5 adding entries 3-23 customizing 2-3 deleting entries 3-23 viewing 3-22 Forwarding mode 802.1Q VLAN User’s Guide INDEX changing 3-13 Frame format changing 3-24 Frames tagged 1-5, 2-5 untagged 1-5, 2-4...
  • Page 90 VLAN ID - (Modifiable) 3-26 VLAN ID - upper part of screen (Read-Only) 3-26 Related Documents x Remote management. See managing the switch Screens 802.1Q VLAN Configuration Menu screen 3-5 Device VLAN Configuration screen 3-8 Port Assignment Configuration screen 3-14 Port Filtering Configuration...
  • Page 91 Frame Type- lower part of screen (Toggle) 3-22 Port (Selectable) 3-22 Port Type (Read-Only) 3-22 VLAN ID (Selectable) 3-22 VLAN Name (Read-Only) 3-22 VLAN ID 1-4 assigning 3-16 VLAN Local Management 3-4 VLAN name 1-4 802.1Q VLAN User’s Guide Index Index-3...
  • Page 92 Index Index-4 802.1Q VLAN User’s Guide...

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