Cabletron Systems 802.1Q manuale d’uso

9032599-02 802.1Q VLAN User’ s Guide[...]

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802.1Q VLAN User’ s Guide i 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 ha ve been made. The hardware, firmware, or software described in this man[...]

Notice ii 802.1Q VLAN User’ s Guide[...]

802.1Q VLAN User’ s Guide iii CONTENTS Figures .................................................................................................... vii Tables..................................................................................................... viii PREFACE Using This Guide ..........................................................[...]

Contents iv 802.1Q VLAN User’ s Guide CHAPTER 3 VLAN CONFIGURATION 3.1 Managing the Switch .................................................................... 3-1 3.1.1 Switch Without VLANs .................................................... 3-1 3.1.2 Switch with VLANs .......................................................... 3-2 3.2 Summary o[...]

Contents 802.1Q VLAN User’ s Guide v CHAPTER 4 EXAMPLES 4.1 Example 1, Single Switch Operation ........................................... 4-1 4.1.1 Solving the Problem ........................................................ 4-2 4.1.2 Frame Handling .............................................................. 4-3 4.2 Example 2, VLANs Across Mu[...]

Contents vi 802.1Q VLAN User’ s Guide[...]

802.1Q VLAN User’ s Guide vii FIGURES Figure P age 1-1 Example of a VLAN .................................................................. 1-2 2-1 Inside the Switch ...................................................................... 2-4 3-1 Switch Management with Only Default VLAN .......................... 3-1 3-2 Switch Management with VLAN[...]

802.1Q VLAN User’ s Guide viii T ABLES T able P age 3-1 802.1Q VLAN Configuration Menu Screen Menu Items .......... 3-7 3-2 Device VLAN Configuration Screen Field Definitions ............. 3-9 3-3 Port Assignment Configuration Screen Field Definitions........ 3-15 3-4 Port Filtering Configuration Screen Field Definitions ............. 3-19 3-5 VL[...]

802.1Q VLAN User’ s Guide ix PREFACE W elcome to the Cabletron Systems 802.1Q VLAN User’ s Guide . This guide introduces and describes Cabletron Systems’ implementation of the IEEE 802.1Q standard for 802.1Q V irtual Local Area Network (VLAN) technology , and the VLAN Local Management screens used to configure Cabletron Systems products used[...]

Preface x 802.1Q VLAN User’ s Guide RELATED DOCUMENTS Other Cabletron Systems documents that may be useful for understanding some of the concepts introduced or discussed in this guide are listed belo w: The SmartSwitch user’ s guide of any Cabletron Systems 802.1Q VLAN aw are SmartSwitch de vice. The manual can be obtained from the W orld W ide[...]

802.1Q VLAN User’ s Guide 1-1 CHAPTER 1 VIR TUAL LOCAL AREA NETW ORKS This chapter introduces the concepts of V irtual Local Area Networks (VLANs) and discusses the central concepts of IEEE 802.1Q VLANs. This chapter also contains information on ho w to contact Cabletron Systems for additional support related to VLANs. 1.1 DEFINING VLANs A V irtu[...]

Chapter 1: Vir tual Local Area Networks 1-2 802.1Q VLAN User’ s Guide Figure 1-1 Example of a VLAN In this example, the Sales and Finance w orkstations hav e been placed on two separate VLANs. In a plain Ethernet en vironment, the entire netw ork is a broadcast domain, and the SmartSwitches follo w the IEEE 802.1D bridging specification to send [...]

T ypes of VLANs 802.1Q VLAN User’ s Guide 1-3 1.2 T YPES OF VLANs There are a number of dif ferent strategies for creating V irtual Local Area Networks, each with their o wn approaches to defining a station’ s membership in a particular VLAN. 1.2.1 802.1Q VLANs An 802.1Q VLAN switch determines the VLAN membership of a data frame by its T ag He[...]

Chapter 1: Vir tual Local Area Networks 1-4 802.1Q VLAN User’ s Guide 1.3 BENEFITS AND RESTRICTIONS The primary benefit of the 802.1Q VLAN technology is that it provides localization of traf fic. This function also of fers improv ements in security and performance to stations assigned to a VLAN. While the localization of traf fic to VLANs can [...]

VLAN T erms 802.1Q VLAN User’ s Guide 1-5 The configuration is accomplished using the Local Management VLAN Forw arding Configuration screen. By default a VLAN is assigned to the FID that matches its VLAN ID. T ag Header (VLAN T ag) Four bytes of data inserted in a frame that identifies the VLAN/frame classification. The T ag Header is insert[...]

Chapter 1: Vir tual Local Area Networks 1-6 802.1Q VLAN User’ s Guide 1D T runk A connection from a switch that passes only untagged traf fic. By default, a port designated as a 1D T runk port has all VLANs on its Port VLAN List and is configured to transmit all frames as untagged frames. Generic Attribute Registration Pr otocol (GARP) GARP is [...]

Getting Help 802.1Q VLAN User’ s Guide 1-7 1.5 GETTING HELP For additional support related to this de vice or document, contact Cabletron Systems using one of the follo wing methods: Before calling Cabletron Systems, have the following information ready: • Y our Cabletron Systems service contract number • A description of the failure • A de[...]

Chapter 1: Vir tual Local Area Networks 1-8 802.1Q VLAN User’ s Guide[...]

802.1Q VLAN User’ s Guide 2-1 CHAPTER 2 VLAN OPERATION This chapter describes the operation of a VLAN switch and discusses the operations that a VLAN switch performs in response to both normal and VLAN-originated network traf fic. 2.1 DESCRIPTION The 802.1Q VLAN operation is slightly dif ferent than the operation of traditional switched networki[...]

Chapter 2: VLAN Operation 2-2 802.1Q VLAN User’ s Guide 2.3 CONFIGURATION PROCESS Before a VLAN can operate, steps must be performed to configure the switch to establish and configure a VLAN. Cabletron Systems VLAN aw are SmartSwitches default to operate in the 802.1Q VLAN mode. Ho we ver , further configuration is necessary to establish multi[...]

VLAN Switch Operation 802.1Q VLAN User’ s Guide 2-3 2.3.3 Customizing the VLAN Forwarding List Each port on a VLAN aw are switch has a VLAN forwarding list that contains, as a minimum, the PVID of the VLAN configured. Additionally , the Port VLAN Forw arding List of each port can be configured to allo w any number of VLANs to be added to its li[...]

Chapter 2: VLAN Operation 2-4 802.1Q VLAN User’ s Guide Figure 2-1 depicts the inside of a switch with six ports, numbered one through six. The switch has been configured to associate VLAN A and B with FID 2, VLAN C and D with FID 3, and VLAN E with FID 4. Port 6 has been classified as a 1Q T runk Port. This classification establishes that all[...]

VLAN Switch Operation 802.1Q VLAN User’ s Guide 2-5 The switch will no w make a forwarding decision on the frame, as described in Section 2.4.2 , F orwarding Decisions . T agged Frames In this example, the switch recei ves a tagged frame from Port 4. The switch examines the frame and notices the frame is tagged for VLAN C. This frame may hav e al[...]

Chapter 2: VLAN Operation 2-6 802.1Q VLAN User’ s Guide For e xample, assume that a frame is received by the switch depicted in Figure 2-1 . This frame is a unicast untagged frame recei ved on Port 3. The frame is then classified for VLAN C. The switch then mak es its forwarding decision by comparing the destination MA C address to its filterin[...]

802.1Q VLAN User’ s Guide 3-1 CHAPTER 3 VLAN CONFIGURATION This chapter describes ho w to set up the switch for local or remote management, and the VLAN Local Management screens used to create and configure VLANs in a SmartSwitch. 3.1 MANAGING THE SWITCH The switch may be managed locally via a terminal connected to the COM port, or remotely (SNM[...]

Chapter 3: VLAN Configuration 3-2 802.1Q VLAN User’ s Guide 3.1.2 Switch with VLANs If the switch is to be configured for multiple VLANs, it may be desirable to configure a management-only VLAN. This allo ws a management station connected to the management VLAN to manage all ports on the switch and make management secure by pre venting managem[...]

Managing the Switch 802.1Q VLAN User’ s Guide 3-3 b. Set the FID so the Management VLAN has its own number to make the VLAN secure. In this example, the FID is 3 and no other VLAN should be assigned to this FID. This keeps the new VLAN from sharing its filtering database with other VLANs in the switch. For details on defining a VLAN, refer to Sec[...]

Chapter 3: VLAN Configuration 3-4 802.1Q VLAN User’ s Guide 3.2 SUMMARY OF VLAN LOCAL MANAGEMENT The VLAN configuration process is an extension of normal Local Management operations. A series of Local Management screens provides access to the functions and commands necessary to add, change, or delete VLANs and to assign ports to those VLANs. A [...]

802.1Q VLAN Configuration Menu Screen 802.1Q VLAN User’ s Guide 3-5 3.3 802.1Q VLAN CONFIGURATION MENU SCREEN When to Use T o select screens to assign switched network ports to VLANs, define new VLANs, and configure port filtering according to a VLAN list or untagged frames. Network users can be logically grouped into VLANs e ven if the y spa[...]

Chapter 3: VLAN Configuration 3-6 802.1Q VLAN User’ s Guide How to Access Use the arro w ke ys to highlight the 802.1Q VLAN CONFIGURA TION MENU item from the module, de vice, or chassis specific Configuration Menu screen and press ENTER. The 802.1Q VLAN Configuration Menu screen displays. Screen Example Figure 3-4 802.1Q VLAN Configuration M[...]

802.1Q VLAN Configuration Menu Screen 802.1Q VLAN User’ s Guide 3-7 Menu Definitions T able 3-1 802.1Q VLAN Configuration Menu Screen Menu Items Menu Item Screen Function DEVICE VLAN CONFIGURATION Used to view , add, name, enable , or disable VLANs within the de vice, and also associate the VLANs to a Filter Database ID (FID). It also enables [...]

Chapter 3: VLAN Configuration 3-8 802.1Q VLAN User’ s Guide 3.4 DEVICE VLAN CONFIGURATION SCREEN When to Use T o define the operating characteristics of the switch to add, name, delete, enable, and disable VLANs, and assign VLANs to FIDs. The screen can display up to eight VLANs simultaneously . How to Access Use the arro w ke ys to highlight t[...]

Device VLAN Configuration Screen 802.1Q VLAN User’ s Guide 3-9 Field Definitions T able 3-2 Device VLAN Configuration Screen Field Definitions Use this field … T o … Forward Default VLAN Out All P or ts (T oggle) Assign or remov e the default VLAN from the P or t VLAN List f or all por ts. When set to YES, the def ault VLAN is added to t[...]

Chapter 3: VLAN Configuration 3-10 802.1Q VLAN User’ s Guide 3.4.1 Defining a VLAN T o define a VLAN, proceed as follows: 1. Use the arrow keys to highlight the VLAN ID field. 2. Enter the VLAN ID using a unique number between 2 and 4094. The VLAN IDs of 0, 1, and 4095 may not be used for user-defined VLANs. If an illegal number is entered, th[...]

Device VLAN Configuration Screen 802.1Q VLAN User’ s Guide 3-11 3.4.2 Changing the VLAN to FID Association T o change the association of a VLAN to a FID, proceed as follows: 1. Use the arrow keys to highlight the VLAN ID field. 2. Enter the VLAN ID of the VLAN of which the FID association is to be changed. If an illegal number is entered, the Ev[...]

Chapter 3: VLAN Configuration 3-12 802.1Q VLAN User’ s Guide 3.4.4 Deleting a VLAN T o delete a VLAN from the current VLAN list, proceed as follows: 1. Enter the VLAN ID. The VLAN Name field will automatically update to display the VLAN’s name if that VLAN has been previously configured. 2. Use the arrow keys to highlight the ADD/DEL field. 3.[...]

Device VLAN Configuration Screen 802.1Q VLAN User’ s Guide 3-13 4. Press ENTER. The message “SAVED OK” displays. 3.4.7 Changing the Forwarding Mode T o change the forwarding mode of the switch, proceed as follo ws: 1. Use the arrow keys to highlight the Forward Default VLAN Out All Ports field. 2. Press the SPACE bar or BACKSPACE to toggle b[...]

Chapter 3: VLAN Configuration 3-14 802.1Q VLAN User’ s Guide 3.5 P OR T ASSIGNMENT CONFIGURATION SCREEN When to Use T o select a mode of operation for each port and to assign a Port VLAN Identification (PVID) to each port. How to Access Use the arro w ke ys to highlight the POR T ASSIGNMENT CONFIGURA TION menu item on the 802.1Q VLAN Configura[...]

P or t Assignment Configuration Screen 802.1Q VLAN User’ s Guide 3-15 Field Definitions 3.5.1 Changing the P or t Mode T o change the operational mode of a port, proceed as follo ws. 1. Use the arrow keys to highlight the PORT MODE field for the module and port combination you wish to change. 2. Use the SPACE bar or BACKSPACE key to step throug[...]

Chapter 3: VLAN Configuration 3-16 802.1Q VLAN User’ s Guide • 1Q TR UNK – This mode sets the port for transmitting to another 802.1Q aw are de vice. In this mode, all frames are transmitted with a tag header included in the frame (excluding BPDUs). The switch will drop all untagged frames it recei ves on the 1Q Trunk port. The Port VLAN Lis[...]

P or t Filtering Configuration Screen 802.1Q VLAN User’ s Guide 3-17 3. When the desired VLAN ID is displayed, use the arrow keys to highlight the SAVE command at the bottom of the screen. 4. Press ENTER. The message “SAVED OK” displays. 3.5.3 P aging Through the P or t List T o display additional ports that do not display in the current scr[...]

Chapter 3: VLAN Configuration 3-18 802.1Q VLAN User’ s Guide How to Access Use the arro w ke ys 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 Figure 3-7 P or t Filtering Configuration Screen Firmware Revisio[...]

P or t Filtering Configuration Screen 802.1Q VLAN User’ s Guide 3-19 Field Definitions 3.6.1 Displaying VLAN IDs Associated with a Port T o display the VLAN IDs and VLAN Names of the VLANs associated with a particular port, proceed as follo ws: 1. Use the arrow keys to highlight the Port field. 2. Use the SPACE bar or BACKSPACE key to step thro[...]

Chapter 3: VLAN Configuration 3-20 802.1Q VLAN User’ s Guide 4. To display the next screen, use the arrow keys to highlight NEXT . Press ENTER to view the entries on the next screen. 5. To display the previous screen, use the arrow keys to highlight PREVIOUS . Press ENTER to view the entries on the previous screen. 3.6.2 Selecting the T ype of F[...]

VLAN Forwarding Configuration Screen 802.1Q VLAN User’ s Guide 3-21 3.7 VLAN FORWARDING CONFIGURATION SCREEN When to Use T o perform the follo wing functions: • V iew the ports included in a VLAN’ s Forwarding List. • Define which ports to include in the VLAN’ s Forwarding List. • Specify the formats of the frames (T agged or Untagged[...]

Chapter 3: VLAN Configuration 3-22 802.1Q VLAN User’ s Guide Field Definitions 3.7.1 Viewing Current VLAN P or ts T o display the VLAN Forwarding List for a particular VLAN, proceed as follo ws: 1. 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. 2. Press ENTER. The [...]

VLAN Forwarding Configuration Screen 802.1Q VLAN User’ s Guide 3-23 3.7.2 P aging Through VLAN Forwarding List Entries T o display additional entries in the VLAN Forwarding List that do not appear on the screen, use the NEXT or PREVIOUS commands located at the bottom of the screen, as follo ws: 1. To display the next screen, use the arrow keys t[...]

Chapter 3: VLAN Configuration 3-24 802.1Q VLAN User’ s Guide 2. Use the arrow keys to highlight the Port field. Step through the available ports on the module with the SPACE bar or BACKSPACE. 3. Use the arrow keys to highlight the ADD/DELETE field. Press the SPACE bar to select DEL . Press ENTER. The Forwarding List entry will be deleted from th[...]

Protocol VLAN Configuration Screen 802.1Q VLAN User’ s Guide 3-25 How to Access Use the arro w ke ys to highlight the PR O TOCOL VLAN CONFIGURA TION menu item on the 802.1Q VLAN Configuration Menu screen and press ENTER. The Protocol VLAN Configuration screen displays. Screen Example Figure 3-9 Protocol VLAN Configuration Screen Firmware Revi[...]

Chapter 3: VLAN Configuration 3-26 802.1Q VLAN User’ s Guide Field Definitions T able 3-6 Protocol VLAN Configuration Screen Field Definitions Use this field … T o … VLAN ID - upper part of screen (Selectable) Displa y the VLAN IDs currently configured and may be selected after the screen is sav ed to call up the Protocol P or ts Confi[...]

Protocol VLAN Configuration Screen 802.1Q VLAN User’ s Guide 3-27 Protocol Type (Selectable) Select one of the f ollowing protocol types: IP – per tains to all IP associated Ether T ypes (i.e., 0x0x0800, 0x0806, and, 0x8035). IPX – per tains to all IPX associated Ether T ypes (i.e., 0x8137, 0x8138, and special cases, 0x0100 [LLC T ype 1 Enca[...]

Chapter 3: VLAN Configuration 3-28 802.1Q VLAN User’ s Guide 3.8.1 Displaying the Current Pr otocol, VLAN ID , and P or t Assignments In some instances it may be desirable to see which VLAN IDs and the associated ports that are currently assigned to a particular protocol. T o display this information, proceed as follo ws: 1. Use the arrow keys t[...]

Protocol VLAN Configuration Screen 802.1Q VLAN User’ s Guide 3-29 1. Use the arrow keys to highlight the VLAN ID field at the bottom of the screen. 2. Enter the VLAN ID. If a new VLAN ID is entered that has not been created on the switch, use a unique number between 2 and 4094. The VLAN IDs of 0, 1, and 4095 may not be used for user-defined VLAN[...]

Chapter 3: VLAN Configuration 3-30 802.1Q VLAN User’ s Guide 7. If CUSTOM was selected in the Protocol Type field, use the arrow keys to highlight the Ether type field. Otherwise, go to step 9. 8. Enter your particular protocol type in the Ether type field. 9. Use the arrow keys to highlight the Action field. 10. Press the SPACE bar to toggle th[...]

Protocol P or ts Configuration Screen 802.1Q VLAN User’ s Guide 3-31 3.9 PROTOCOL P OR TS CONFIGURATION SCREEN When to Use T o display the current ports and port types associated with a VLAN and protocol selected in the Protocol VLAN Configuration screen described in Section 3.8 . How to Access Use the arro w ke ys to highlight a line of inform[...]

Chapter 3: VLAN Configuration 3-32 802.1Q VLAN User’ s Guide Field Definitions T able 3-7 Protocol P orts Configuration Screen Field Definitions Use this field … T o … Current Protocol P orts (Read-Only) Displa y the current por ts associated with the VLAN ID . P or t T ype (Read-Only) Displa y the P or t T ype associated with the por t [...]

Quick VLAN W alkthrough 802.1Q VLAN User’ s Guide 3-33 3.9.1 Adding/Deleting P or ts Associated with a VLAN ID T o add or delete ports from a VLAN, proceed as follows: 1. Use the arrow keys to highlight the Port field. 2. Press the SPACE bar to step to the appropriate port number. The associated protocol is displayed for that port. 3. Use the arr[...]

Chapter 3: VLAN Configuration 3-34 802.1Q VLAN User’ s Guide 3. Use the arrow keys to highlight the VLAN ID field. Assign a number to a new VLAN by typing the number “ 2 ” in the VLAN ID field. 4. Use the arrow keys to highlight the FID field. In this example we will assign the new VLAN to FID 2 by typing the number “ 2 ” in the FID fiel[...]

Quick VLAN W alkthrough 802.1Q VLAN User’ s Guide 3-35 Figure 3-11 W alkthrough Stage One It is no w time to assign a port to this ne w VLAN. 9. 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 CONFIGURA[...]

Chapter 3: VLAN Configuration 3-36 802.1Q VLAN User’ s Guide 11. Use the SPACE bar to step sequentially through the previously configured VLAN ID numbers. When the number 0002 (the new VLAN ID) is displayed, the FID field updates to 0002, and the VLAN Name field updates showing the name assigned to this VLAN, TEST VLAN . 12. Use the arrow keys t[...]

Quick VLAN W alkthrough 802.1Q VLAN User’ s Guide 3-37 13. Use the arrow keys to highlight the Port Mode field for port 10. Use the SPACE bar or BACKSPACE key to step sequentially through the possible settings of the port until 1Q TRUNK is displayed. 14. Use the arrow keys to highlight the SAVE command at the bottom of the screen. Press ENTER. Po[...]

Chapter 3: VLAN Configuration 3-38 802.1Q VLAN User’ s Guide 15. 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, Figure 3-14 , displays. Figure 3-14 W alkthrough Stage Four 16. Use the arrow keys to highlight the Admin Status field of[...]

Quick VLAN W alkthrough 802.1Q VLAN User’ s Guide 3-39 The Port VLAN List of any port on the de vice can also be checked at any time using the Port Filtering Configuration screen. A list of all ports eligible to transmit frames for a gi ven VLAN will also be listed on the VLAN Forw arding Configuration screen. Each port can also be set to filt[...]

Chapter 3: VLAN Configuration 3-40 802.1Q VLAN User’ s Guide Figure 3-15 Final W alkthrough Sta ge This ef fecti vely completes the displaying of the Port VLAN List and the setting of the port filtering of all untagged frames. Firmware Revision: XX.XX.XX Port Filtering Configuration 25992-20 Module T ype: xxxxx-xx BOOTPROM Revision: XX.XX.XX 6C[...]

802.1Q VLAN User’ s Guide 4-1 CHAPTER 4 EXAMPLES This chapter provides e xamples of how VLAN aware SmartSwitches can be configured to group users at the port le v el to create VLANs in existing networks. Each e xample presents a problem and sho ws ho w it is solved by configuring the switches using the VLAN Local Management screens. The actual [...]

Chapter 4: Examples 4-2 802.1Q VLAN User’ s Guide 4.1.1 Solving the Prob lem T o set up this switch, users will be assigned to two ne w VLANs, red stations to the Red VLAN, and blue stations to the Blue VLAN. The information belo w describes ho w the switch is configured to create these two VLANs and how users are assigned to them. 1. First, the[...]

Example 1, Single Switch Operation 802.1Q VLAN User’ s Guide 4-3 The switch will no w classify each frame recei ved as belonging to either the Red or Blue VLANs. T raffic from one VLAN will not be forwarded to the members of the other VLAN, and all frames transmitted by the switch will be normal, untagged Ethernet frames. 4.1.2 Frame Handling Th[...]

Chapter 4: Examples 4-4 802.1Q VLAN User’ s Guide 6. The switch examines its VLAN configuration information and determines that the frame for Red VLAN is allowed to be forwarded out Port 1 and that it must be sent in an untagged format. 7. The switch forwards the frame out Port 1. Any other unicast transmissions between stations R1 and R2 will be[...]

Example 2, VLANs Across Multiple Switches 802.1Q VLAN User’ s Guide 4-5 Figure 4-3 Example 2, VLANs Across Multiple Switc hes 4.2.1 Solving the Prob lem T o solve the problem in this e xample, the users are assigned to VLANs using Switch 4 and Switch 2 as sho wn in Figure 4-3 . Redco users are assigned to the Red VLAN and Blue Industries users to[...]

Chapter 4: Examples 4-6 802.1Q VLAN User’ s Guide Switch 4 Switch 4 is set as follo ws: 1. Two VLANs are added to the list of VLANs in the Device/VLAN Configuration screen and assigned to a FID. In this example they are as follows: • VLAN ID 2, FID 2, with a VLAN Name of Red • VLAN ID 3, FID 3, with a VLAN Name of Blue Because the VLANs are a[...]

Example 2, VLANs Across Multiple Switches 802.1Q VLAN User’ s Guide 4-7 Switch 2 Switch 2 is set as follo ws: 1. Two VLANs are added to the list of VLANs using the Device/VLAN Configuration screen and assigned to a FID. In this example they are as follows: • VLAN ID 2, FID 2, with a VLAN Name of Red • VLAN ID 3, FID 3, with a VLAN Name of Blu[...]

Chapter 4: Examples 4-8 802.1Q VLAN User’ s Guide 4.2.2 Frame Handling The follo wing describes ho w , when User A attempts to log on to the File Server on Bridge 4, the frames from User A are classified on Switch 4 and trav erse the network. In this example, the MA C address of User A is “Y” and the MA C address for the File Server is “Z?[...]

Example 2, VLANs Across Multiple Switches 802.1Q VLAN User’ s Guide 4-9 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. Figure 4-5 T ransmitting to Switch 4 3. When Switch 2 receives the[...]

Chapter 4: Examples 4-10 802.1Q VLAN User’ s Guide Figure 4-6 T ransmitting to Bridge 4 4. The File Server responds with a unicast frame to User A. All switches between the File Server and User A have an entry in their respective Source Address Tables identifying which port to use for forwarding the frame to User A, MAC address “Y” in FID 3. [...]

Example 3, 1D T runk Connection to 802.1Q VLAN Network 802.1Q VLAN User’ s Guide 4-11 As illustrated in Figure 4-7 , a third group of stations, the Green Incorporated staf f, is added to the facility . Also, the Green Incorporated Network Administrators want to add a Mail Server to the netw ork on the first floor . Figure 4-7 Example 3, 1D T ru[...]

Chapter 4: Examples 4-12 802.1Q VLAN User’ s Guide 4.3.1 Solving the Prob lem Much of the existing netw ork configuration can remain as it was for Example 2, VLANs Across Multiple Switches . Howe ver , the Forward Default VLAN Out All Ports must be set to YES on Switch 4 and 2, and a ne w 1Q T runk port must be activ ated and configured on Swit[...]

Example 3, 1D T runk Connection to 802.1Q VLAN Network 802.1Q VLAN User’ s Guide 4-13 2. The Forward Default VLAN Out All Ports is set to YES using the Device/VLAN Configuration screen. This adds the Default VLAN to the Port VLAN List of every switch port and all VLANs become members of FID 1. 3. A Port VLAN ID is assigned to Port 1 using the Por[...]

Chapter 4: Examples 4-14 802.1Q VLAN User’ s Guide 2. Switch 4 receives the frame and classifies this new untagged frame as belonging to the Red VLAN. Since the frame is a broadcast, it is forwarded to any ports that are classified as eligible to receive Red VLAN frames. Switch 4 also updates its Source Address Table for FID 1, identifying User B[...]

Example 3, 1D T runk Connection to 802.1Q VLAN Network 802.1Q VLAN User’ s Guide 4-15 Figure 4-9 Switch 2 Forwar ds to 1Q T runk 4. 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. I[...]

Chapter 4: Examples 4-16 802.1Q VLAN User’ s Guide Switch 1 checks the Filtering Database for the MAC address of User B. User B’s MAC address is located, and Port 2 is identified as User B’s location. The frame is then checked for eligibility and frame format for Port 2. Since Port 2 is a 1Q Trunk port, it is eligible to transmit frames for a[...]

Example 4, Isolating Network T raffic According to Pr otocol 802.1Q VLAN User’ s Guide 4-17 4.4 EXAMPLE 4, ISOLATING NETWORK T RAFFIC ACCORDING TO PR OTOCOL This final example illustrates ho w to restrict AppleT alk protocol traf fic of a network to pre vent unwanted multicast frames from slo wing down the whole network and yet be able to send[...]

Chapter 4: Examples 4-18 802.1Q VLAN User’ s Guide Figure 4-11 Example 4, Isolating T raffic According to Protocol 4.4.1 Solving the Prob lem Much of the existing netw ork configuration can remain as it was for Example 3, 1D T runk Connection to 802.1Q VLAN Network . Howe ver , Switch 3, Switch 5, and the de vices that will make up Publication?[...]

Example 4, Isolating Network T raffic According to Pr otocol 802.1Q VLAN User’ s Guide 4-19 Switch 5 will be configured to isolate all AppleT alk protocol frame traffic to the de vices in the Grey VLAN and all other protocol traffic to the Y ellow VLAN. Switch 3 will link the traffic from Switch 5 to the buildings netw ork backbone. T wo 1Q [...]

Chapter 4: Examples 4-20 802.1Q VLAN User’ s Guide Switch 5 Switch 5 is set as follo ws: 1. Two VLANs are added to the list of VLANs in the Device/VLAN Configuration screen. In this example, it is set as follows: • VLAN ID 5, FID 5, with a VLAN Name of Y ellow • VLAN ID 6, FID 6, with a VLAN Name of Grey 2. The Forward Default VLAN Out All Po[...]

Example 4, Isolating Network T raffic According to Pr otocol 802.1Q VLAN User’ s Guide 4-21 5. The AppleTalk frames must now be restricted to Ports 2 through 8 of the Yellow VLAN. On the Protocol Ports Configuration screen, All ports except Port 1 are assigned to the AppleTalk protocol, as follows: • Port 2, VLAN ID: 6, Protocol: AppleTalk •[...]

Chapter 4: Examples 4-22 802.1Q VLAN User’ s Guide[...]

802.1Q VLAN User’ s Guide Index-1 INDEX Numerics 1D Trunk 1-6, 3-16, 4-10 1Q Trunk 1-5, 3-16, 4-4 C Chapters organization ix Configuration 2-2 Conventions x D Default VLAN 1-5 Device VLAN Configuration screen ADD/DEL (Toggle) 3-9 Admin Status (Toggle) 3-9 FID - lower part of screen (Modifiable) 3-9 FID - upper part of screen (Read-Only) 3-9 VLAN [...]

Index Index-2 802.1Q VLAN User’ s Guide P Port Assignment Configuration screen FID (Read-Only) 3-15 Port Mode (Selectable) 3-15 VLAN ID (Selectable) 3-15 VLAN Name (Read-Only) 3-15 Port Filtering Configuration screen Filter All Untagged Frames (Toggle) 3-19 Filter Using VLAN Lists (Toggle) 3-19 Port # (Selectable) 3-19 VLAN ID (Read-Only) 3-19 VL[...]

Index 802.1Q VLAN User’ s Guide Index-3 U Untagged frame 1-5, 2-4 V VLAN assigning ports 2-2 components 2-1 configuration 2-2 default VLAN 1-5 defining 2-2 definition 1-1 to 1-4 operation 2-3 terms 1-4 types 1-3 VLAN Configuration deleting 3-12 disabling 3-12 enabling 3-12 VLAN Forwarding Configuration screen ADD/DELETE (Toggle) 3-22 Current VLAN[...]

Index Index-4 802.1Q VLAN User’ s Guide[...]