Enterasys Networks 802.1Q - Manuals

vi Table Page Tables 3-1 802.1Q VLAN Configuration Menu Screen Menu Items ...............................................3-6 3-2 Device VLAN Configuration Screen Field Definitions ...................................................3-9 3-3 Port Assignment Configuration Screen Field Definitions .........

Preface vii Preface Welcome to the Enterasys Networks 802.1Q VLAN User’s Guide . This guide introduces and describes Enterasys Networks’ implementation of the IEEE 802.1Q standard for 802.1Q Virtual Local Area Network (VLAN) technology, and the VLAN Local Management screens used to configure Enteras...

Related Documents viii Preface Chapter 3, VLAN Configuration , describes how to set up the switch for local and remote management, shows the Local Management screens used in 802.1Q VLAN configuration and explains their use. Chapter 4, Examples , offers examples of 802.1Q VLANs and explains how netwo...

Virtual Local Area Networks 1-1 1 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 Enterasys Networks for additional support relate...

Types of VLANs 1-2 Virtual Local Area Networks Figure 1-1 Example of a VLAN In this example, the Sales and Finance workstations have been placed on two separate VLANs. In a plain Ethernet environment, the entire network is a broadcast domain, and the SmartSwitches follow the IEEE 802.1D bridging spe...

Benefits and Restrictions Virtual Local Area Networks 1-3 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...

VLAN Terms 1-4 Virtual Local Area Networks 1.4 VLAN TERMS To fully understand the operation and configuration of port based VLANs, it is essential to understand the definitions of several key terms. VLAN ID A unique number (between 1 and 4094) that identifies a particular VLAN. VLAN Name A 32-charac...

Getting Help 1-6 Virtual Local Area Networks 1.5 GETTING HELP For additional support related to this document, contact Enterasys Networks using one of the following methods: Before contacting Enterasys Networks for technical support, have the following information ready: • Your Enterasys Networks se...

VLAN Operation 2-1 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 traffic. 2.1 DESCRIPTION The 802.1Q VLAN operation is slightly different than the operation of tra...

Configuration Process 2-2 VLAN Operation 2.3 CONFIGURATION PROCESS Before a VLAN can operate, steps must be performed to configure the switch to establish and configure a VLAN. Enterasys Networks VLAN aware SmartSwitches default to operate in the 802.1Q VLAN mode. However, further configuration is n...

VLAN Switch Operation VLAN Operation 2-3 2.4 VLAN SWITCH OPERATION IEEE 802.1Q VLAN switches act on the classification of frames into VLANs. Sometimes, VLAN classification is based on tags in the headers of data frames. These VLAN tags are added to data frames by the switch as the frames are transmi...

VLAN Switch Operation 2-4 VLAN Operation 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 no...

GARP Switch Operation VLAN Operation 2-5 2.4.2.2 Known Unicasts When a VLAN switch receives a frame with a known MAC address as its destination address, the action taken by the switch to determine how the frame is transmitted depends on the VLAN, the VLAN associated FID, and if the port identified t...

VLAN Configuration 3-1 3 VLAN Configuration This chapter describes how 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...

Managing the Switch 3-2 VLAN Configuration Figure 3-1 Switch Management with Only Default VLAN 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 allows a management station connected to the management VLAN to m...

Managing the Switch VLAN Configuration 3-3 Figure 3-2 Switch Management with VLANs To set up the switch shown in Figure 3-2 to establish a management VLAN on port 1, use the process described below: 1. Use the Device VLAN Configuration screen for the following: a. Define a new VLAN named “Management...

Summary of VLAN Local Management 3-4 VLAN Configuration This process would be repeated on every switch that is connected in the network to ensure that each switch has a secure Management VLAN for switch management. If the switch was connected to another switch via port 7, which was set as a 1Q Trunk...

802.1Q VLAN Configuration Menu Screen VLAN Configuration 3-5 Preparing for VLAN Configuration A little forethought and planning is essential to a good VLAN implementation. Before attempting to configure a single switch for VLAN operation, consider the following: • How many VLANs will be required • W...

802.1Q VLAN Configuration Menu Screen 3-6 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 Exampl...

Device VLAN Configuration Screen VLAN Configuration 3-7 3.4 DEVICE VLAN CONFIGURATION SCREEN When to Use To 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 Ac...

Device VLAN Configuration Screen 3-8 VLAN Configuration Screen Example Figure 3-5 Device VLAN Configuration Screen Firmware Revision: XX.XX.XX Device VLAN Configuration 25993-05 Module Type: xxxxx-xx BOOTPROM Revision: XX.XX.XX 6C105 LOCAL MANAGEMENT Slot Number: xx RETURN EXIT Forward Default VLAN ...

Device VLAN Configuration Screen VLAN Configuration 3-9 Field Definitions Table 3-2 Device VLAN Configuration Screen Field Definitions Use this field … To … Forward Default VLAN Out All Ports (Toggle) Assign or remove the default VLAN from the Port VLAN List for all ports. When set to YES, the defau...

Device VLAN Configuration Screen 3-10 VLAN Configuration 3.4.1 Defining a VLAN To 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 VL...

Device VLAN Configuration Screen VLAN Configuration 3-11 6. Type a name of up to 32 ASCII characters in the VLAN Name field . This is an optional attribute of a VLAN, and is not required for VLAN operation. 7. Use the arrow keys to highlight the ADD/DEL field. 8. Press the SPACE bar to select ADD fo...

Device VLAN Configuration Screen 3-12 VLAN Configuration 4. Use the arrow keys to highlight the SAVE command at the bottom of the screen. Press ENTER. The message “SAVED OK” displays. 3.4.4 Deleting a VLAN To delete a VLAN from the current VLAN list, proceed as follows: 1. Enter the VLAN ID. The VLA...

Device VLAN Configuration Screen VLAN Configuration 3-13 3. Use the arrow keys to highlight the SAVE command at the bottom of the screen. 4. Press ENTER. The message “SAVED OK” displays. 3.4.7 Changing the Forwarding Mode To change the forwarding mode of the switch, proceed as follows: 1. Use the ar...

Port Assignment Configuration Screen 3-14 VLAN Configuration 3.5 PORT ASSIGNMENT CONFIGURATION SCREEN When to Use 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 ...

Port Assignment Configuration Screen VLAN Configuration 3-15 Field Definitions 3.5.1 Changing the Port Mode To change the operational mode of a port, proceed as follows. 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 ba...

Port Assignment Configuration Screen 3-16 VLAN Configuration • 1D TRUNK – This mode sets the port for transmitting to a legacy 802.1D switch fabric. In this mode, all incoming frames are classified into the default VLAN and all frames are transmitted untagged. The switch expects to receive only unta...

Port Filtering Configuration Screen VLAN Configuration 3-17 3.5.3 Paging Through the Port List To display additional ports that do not display in the current screen, use the NEXT or PREVIOUS commands at the bottom of the screen, as follows: 1. To display the next screen, use the arrow keys to highli...

Port Filtering Configuration Screen 3-18 VLAN Configuration Screen Example Figure 3-7 Port Filtering Configuration Screen Field Definitions Table 3-4 Port Filtering Configuration Screen Field Definitions Use this field … To … VLAN ID (Read-Only) See the VLAN ID of the VLANs that are configured to ha...

Port Filtering Configuration Screen VLAN Configuration 3-19 3.6.1 Displaying VLAN IDs Associated with a Port To display the VLAN IDs and VLAN Names of the VLANs associated with a particular port, proceed as follows: 1. Use the arrow keys to highlight the Port field. 2. Use the SPACE bar or BACKSPACE...

VLAN Forwarding Configuration Screen 3-20 VLAN Configuration 3.6.2 Selecting the Type of Filtering for a Port A port can be set to filter out received frames according to its Port VLAN List. This keeps them from being transmitted and drops all untagged frames from being transmitted. To set this type...

VLAN Forwarding Configuration Screen VLAN Configuration 3-21 Screen Example Figure 3-8 VLAN Forwarding Configuration Screen Field Definitions Table 3-5 VLAN Forwarding Configuration Screen Field Definitions Use this field … To … Current VLAN Ports (Read-Only) See the ports that are currently configu...

VLAN Forwarding Configuration Screen 3-22 VLAN Configuration 3.7.1 Viewing Current VLAN Ports To display the VLAN Forwarding List for a particular VLAN, proceed as follows: 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 Na...

VLAN Forwarding Configuration Screen VLAN Configuration 3-23 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 ADD or DELETE. Press ...

Protocol VLAN Configuration Screen 3-24 VLAN Configuration 3.8 PROTOCOL VLAN CONFIGURATION SCREEN When to Use To assign a protocol to a VLAN ID on one or more ports on the switch. This enables the switch to add a particular VLAN identifier with the specified protocol to each frame that arrives on a ...

Protocol VLAN Configuration Screen VLAN Configuration 3-25 Field Definitions Table 3-6 Protocol VLAN Configuration Screen Field Definitions Use this field … To … VLAN ID - upper part of screen (Selectable) Display the VLAN IDs currently configured and may be selected after the screen is saved to cal...

Protocol VLAN Configuration Screen 3-26 VLAN Configuration Protocol Type (Selectable) Select one of the following protocol types: IP – pertains to all IP associated Ether Types (i.e., 0x0x0800, 0x0806, and, 0x8035). IPX – pertains to all IPX associated Ether Types (i.e., 0x8137, 0x8138, and special ...

Protocol VLAN Configuration Screen VLAN Configuration 3-27 3.8.1 Displaying the Current Protocol, VLAN ID, andPort 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. To display this information, proce...

Protocol VLAN Configuration Screen 3-28 VLAN Configuration 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 VLANs.A FID will automatically be assigned to ...

Protocol Ports Configuration Screen VLAN Configuration 3-29 11. Press ENTER and the new settings are displayed under the VLAN ID, Protocol Type, and Configured Ports values. 12. Use the arrow keys to highlight the SAVE command at the bottom of the screen. 13. Press ENTER. The message “SAVED OK” disp...

Protocol Ports Configuration Screen 3-30 VLAN Configuration Screen Example Figure 3-10 Protocol Ports Configuration Screen Field Definitions Table 3-7 Protocol Ports Configuration Screen Field Definitions Use this field … To … Current Protocol Ports (Read-Only) Display the current ports associated w...

Protocol Ports Configuration Screen VLAN Configuration 3-31 3.9.1 Adding/Deleting Ports Associated with a VLAN ID To 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 p...

Quick VLAN Walkthrough 3-32 VLAN Configuration 3.10 QUICK VLAN WALKTHROUGH The procedures below provide a short tutorial walkthrough that presents each of the steps necessary to configure a new VLAN, assign a port to it, and check the Port VLAN List of the port. You may wish to follow this walkthrou...

Quick VLAN Walkthrough VLAN Configuration 3-33 Figure 3-11 Walkthrough Stage One It is now time to assign a port to this new 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...

Quick VLAN Walkthrough 3-34 VLAN Configuration 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, TES...

Quick VLAN Walkthrough VLAN Configuration 3-35 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 t...

Quick VLAN Walkthrough 3-36 VLAN Configuration Figure 3-14 Walkthrough Stage Four 16. Use the arrow keys to highlight the Admin Status field of VLAN ID 2, the TEST VLAN. 17. Press the SPACE bar to toggle the field to display Enabled. 18. Use the arrow keys to highlight the SAVE command at the bottom...

Quick VLAN Walkthrough VLAN Configuration 3-37 20. On the 802.1Q VLAN Main Menu screen, use the arrow keys to highlight the PORT FILTERING CONFIGURATION menu item. Press ENTER. The Port Filtering Configuration screen displays. 21. Use the arrow keys to highlight the Port field. 22. Press the SPACE b...

Examples 4-1 4 Examples This chapter provides examples of how VLAN aware SmartSwitches can be configured to group users at the port level to create VLANs in existing networks. Each example presents a problem and shows how it is solved by configuring the switches using the VLAN Local Management scree...

Example 1, Single Switch Operation 4-2 Examples 4.1.1 Solving the Problem To set up this switch, users will be assigned to two new VLANs, red stations to the Red VLAN, and blue stations to the Blue VLAN. The information below describes how the switch is configured to create these two VLANs and how u...

Example 2, VLANs Across Multiple Switches Examples 4-3 4.1.2 Frame Handling This section describes the operations of the switch when two frames are received. The first frame is a broadcast sent by station R1. 1. Station R1 transmits the broadcast frame. The switch receives this frame on Port 1. As t...

Example 2, VLANs Across Multiple Switches 4-4 Examples Figure 4-3 Example 2, VLANs Across Multiple Switches 4.2.1 Solving the Problem To solve the problem in this example, the users are assigned to VLANs using Switch 4 and Switch 2 as shown in Figure 4-3 . Redco users are assigned to the Red VLAN an...

Example 2, VLANs Across Multiple Switches Examples 4-5 Switch 4 Switch 4 is set as follows: 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, ...

Example 2, VLANs Across Multiple Switches 4-6 Examples 2. A Port VLAN ID is assigned to each port (1 and 3) as follows using the Port Assignment screen: • Port 1, VLAN ID: 223 for the Blue VLAN • Port 3, VLAN ID: 222 for the Red VLAN These settings change the configuration of the switch, so that Por...

Example 2, VLANs Across Multiple Switches Examples 4-7 2. Switch 4 receives the frame from Bridge 1 and immediately classifies it as belonging to the Red VLAN. After the frame is classified, Switch 4 checks the Destination Address and, upon discovering that it is a Broadcast Destination Address, for...

Example 3, 1D Trunk Connection to 802.1Q VLAN Network 4-8 Examples 3. When Switch 2 receives the tagged frame on its Port 2, it checks the frame’s VLAN Tag Header and determines that the frame is classified as belonging to the Red VLAN, and that the frame is a broadcast frame. Switch 2 forwards the ...

Example 3, 1D Trunk Connection to 802.1Q VLAN Network Examples 4-9 In this example, a merger has taken place between the companies in the previous example, Redco and Blue Industries. The two companies have become divisions within a single corporation, Green Incorporated. As illustrated in Figure 4-7...

Example 3, 1D Trunk Connection to 802.1Q VLAN Network 4-10 Examples 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 hav...

Example 3, 1D Trunk Connection to 802.1Q VLAN Network 4-12 Examples Figure 4-8 Bridge 1 Broadcasts Frames 3. Switch 2 receives the tagged Red VLAN frame on Port 2, as shown in Figure 4-9 . The VLAN Tag in the frame is maintained, classifying the frame as belonging to the Red VLAN. The switch forward...

Example 3, 1D Trunk Connection to 802.1Q VLAN Network Examples 4-13 Figure 4-10 Switch 1 Forwards to 1D Trunk 5. The Mail Server receives the broadcast frame and recognizes it. The Mail Server responds with a unicast frame to User B. This frame crosses the 1D Trunk and is received by Switch 1. Switc...

Example 4, Isolating Network Traffic According to Protocol 4-14 Examples 8. Bridge 1 receives the frame and recognizes User B’s MAC address. The frame is forwarded to the correct port and the bridge’s Source Address Table is updated with an entry for the Mail Server’s MAC address. User B receives th...

Example 4, Isolating Network Traffic According to Protocol Examples 4-15 Figure 4-11 Example 4, Isolating Traffic According to Protocol 4.4.1 Solving the Problem Much of the existing network configuration can remain as it was for Example 3, 1D Trunk Connection to 802.1Q VLAN Network . However, Switc...

Example 4, Isolating Network Traffic According to Protocol 4-16 Examples Two 1Q Trunk ports must be activated and configured on Switch 3, and one 1Q Trunk port must be activated and configured on Switch 4. Ports 2, 3, 4, 5, 6, 7, and 8 of Switch 5 are connected to the Publication Department devices....

Index-1 Index Numerics 1D Trunk 1-5 , 3-16 , 4-8 1Q Trunk 1-5 , 3-15 , 4-3 C Chapters organization vii Configuration 2-2 Conventions viii D Default VLAN 1-4 Device VLAN Configuration screen ADD/DEL (Toggle) 3-10 Admin Status (Toggle) 3-9 FID - lower part of screen (Modifiable) 3-10 FID - upper part ...