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Cabletron Systems 802.1Q manual Changing the Frame Format, Protocol Vlan Configuration Screen

Models: 802.1Q

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3.7.5Changing the Frame Format

Chapter 3: VLAN Conﬁguration

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 the list of current VLANs once the configuration is saved.

4.Use the arrow keys to highlight the SAVE command at the bottom of the screen.

5.Press ENTER. The message “SAVED OK” displays and the port is deleted from the VLAN Forwarding List of the selected VLAN.

3.7.5Changing the Frame Format

To change the frame format for a port, proceed as follows:

1.Use the arrow keys to highlight the Port field. Step through the available ports by pressing the SPACE bar or BACKSPACE.

2.Using the arrow keys, select the Frame Type field. Use the SPACE bar or BACKSPACE to toggle between Tagged or Untagged.

3.Use the arrow keys to highlight the SAVE command at the bottom of the screen.

4.Press ENTER. The message “SAVED OK” displays.

3.8PROTOCOL 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 conﬁgured port. Other switches receiving the frame will classify the frame according to the 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

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Cabletron Systems 802.1Q manual Changing the Frame Format, Protocol Vlan Configuration Screen, When to Use

Contents

802.1Q VLAN User’s Guide 9032599-02Page 802.1Q VLAN User’s Guide 802.1Q VLAN User’s Guide CHAPTER CONTENTSPREFACE VIRTUAL LOCAL AREA NETWORKSCHAPTER ContentsVLAN CONFIGURATION 802.1Q VLAN User’s GuideEXAMPLES ContentsCHAPTER 802.1Q VLAN User’s GuideContents 802.1Q VLAN User’s GuideFIGURES 802.1Q VLAN User’s Guide802.1Q VLAN User’s Guide TABLES802.1Q VLAN Configuration Menu Screen Menu Items viiiSTRUCTURE OF THIS GUIDE USING THIS GUIDEPREFACE RELATED DOCUMENTS DOCUMENT CONVENTIONSCHAPTER VIRTUAL LOCAL AREA NETWORKS 1.1 DEFINING VLANsBuilding One Building Two1.2.2 SecureFast VLANs 1.2 TYPES OF VLANs1.2.1 802.1Q VLANs 1.2.3 Other VLAN Strategies1.3 BENEFITS AND RESTRICTIONS 1.4 VLAN TERMSA data frame that does not have a Tag Header GARP VLAN Registration Protocol GVRP 1D TrunkGeneric Attribute Registration Protocol GARP GARP Multicast Registration Protocol GMRP1.5 GETTING HELP Chapter 1 Virtual Local Area Networks 802.1Q VLAN User’s Guide2.2 VLAN COMPONENTS CHAPTER VLAN OPERATION2.1 DESCRIPTION 2.3.2 Classifying Frames to a VLAN 2.3 CONFIGURATION PROCESS2.3.1 Deﬁning a VLAN Chapter 2 VLAN Operation2.4 VLAN SWITCH OPERATION 2.3.3 Customizing the VLAN Forwarding List2.4.1 Receiving Frames from VLAN Ports Untagged Frames2.4.2.2 Known Unicasts 2.4.2 Forwarding Decisions2.4.2.1 Broadcasts, Multicasts, and Unknown Unicasts Tagged Frames2.5 GARP SWITCH OPERATION 3.1.1 Switch Without VLANs CHAPTER VLAN CONFIGURATION3.1 MANAGING THE SWITCH 802.1Q Switch3.1.2 Switch with VLANs 802.1Q Switch2. Use the Port Assignment Configuration screen for the following 3.2 SUMMARY OF VLAN LOCAL MANAGEMENT 3.2.1 Preparing for VLAN Conﬁguration3.3 802.1Q VLAN CONFIGURATION MENU SCREEN When to UseFigure 3-4 802.1Q VLAN Conﬁguration Menu Screen How to AccessScreen Example 802.1Q VLAN User’s Guide Menu Deﬁnitions802.1Q VLAN Conﬁguration Menu Screen Table 3-1 802.1Q VLAN Conﬁguration Menu Screen Menu ItemsHow to Access 3.4 DEVICE VLAN CONFIGURATION SCREENWhen to Use Screen Example802.1Q VLAN User’s Guide Field DeﬁnitionsDevice VLAN Conﬁguration Screen Table 3-2 Device VLAN Conﬁguration Screen Field Deﬁnitions3.4.1 Deﬁning a VLAN 3.4.2 Changing the VLAN to FID Association 3.4.3 Renaming a VLAN3.4.6 Disabling VLANs 3.4.4 Deleting a VLAN3.4.5 Enabling VLANs The default VLAN cannot be deleted from the listThe default VLAN cannot be disabled 3.4.7 Changing the Forwarding Mode3.4.8 Paging Through the VLAN List How to Access 3.5 PORT ASSIGNMENT CONFIGURATION SCREENWhen to Use Screen Example3.5.1 Changing the Port Mode Field Deﬁnitions3.5.2 Assigning a VLAN ID When to Use 3.6 PORT FILTERING CONFIGURATION SCREEN3.5.3 Paging Through the Port List Chapter 3 VLAN Conﬁguration How to AccessScreen Example 3-183.6.1 Displaying VLAN IDs Associated with a Port Field Deﬁnitions3.6.2 Selecting the Type of Filtering for a Port How to Access 3.7 VLAN FORWARDING CONFIGURATION SCREENWhen to Use Screen ExampleSee the frame format Tagged or Untagged for the frames 3.7.1 Viewing Current VLAN PortsField Deﬁnitions 3.7.4 Deleting Forwarding List Entries 3.7.2 Paging Through VLAN Forwarding List Entries3.7.3 Adding Forwarding List Entries When to Use 3.8 PROTOCOL VLAN CONFIGURATION SCREEN3.7.5 Changing the Frame Format Protocol VLAN Conﬁguration Screen How to AccessScreen Example 802.1Q VLAN User’s Guide3-26 Field DeﬁnitionsChapter 3 VLAN Conﬁguration 802.1Q VLAN User’s Guide3-27 Protocol VLAN Conﬁguration Screen802.1Q VLAN User’s Guide Table 3-6 Protocol VLAN Conﬁguration Screen Field Deﬁnitions Cont’d3.8.1 Displaying the Current Protocol, VLAN ID, and Port Assignments 3.8.2 Assigning a Protocol Family to a VLAN IDTIP displayed in the Protocol ﬁeld, press ENTER Protocol VLAN Conﬁguration ScreenTo see if there are VLANs currently assigned to the Protocol 802.1Q VLAN User’s Guide3.8.3 Displaying the Protocol Types on Current Ports How to Access 3.9 PROTOCOL PORTS CONFIGURATION SCREENWhen to Use Screen Example3-32 Field DeﬁnitionsChapter 3 VLAN Conﬁguration 802.1Q VLAN User’s Guide3.9.1 Adding/Deleting Ports Associated with a VLAN ID 3.10 QUICK VLAN WALKTHROUGH6. Use the arrow keys to highlight the ADD/DEL field It is now time to assign a port to this new VLAN Figure 3-12 Walkthrough Stage Two Figure 3-13 Walkthrough Stage Three 17. Press the SPACE bar to toggle the field to display Enabled 21. Use the arrow keys to highlight the Port field 802.1Q VLAN User’s Guide Chapter 3 VLAN Conﬁguration3-40 Figure 3-15 Final Walkthrough StageCHAPTER EXAMPLES 802.1Q Switch4.1 EXAMPLE 1, SINGLE SWITCH OPERATION R1 R2 R3B3 B2 B1 4.1.1 Solving the Problem802.1Q Switch 4.1.2 Frame Handling 4.2 EXAMPLE 2, VLANS ACROSS MULTIPLE SWITCHES 4.2.1 Solving the Problem Figure 4-3 Example 2, VLANs Across Multiple SwitchesSwitch 4 is set as follows Switch 2 is set as follows 4.2.2 Frame Handling Figure 4-4 Bridge 1 Broadcasts FramesFigure 4-5 Transmitting to Switch 4.3 EXAMPLE 3, 1D TRUNK CONNECTION TO 802.1Q VLAN NETWORK Figure 4-6 Transmitting to BridgeGreen Incorporated Figure 4-7 Example 3, 1D Trunk Connection to 802.1Q VLAN NetworkUser B 4.3.1 Solving the Problem 4.3.2 Frame Handling Figure 4-8 Bridge 1 Broadcasts Frames Figure 4-9 Switch 2 Forwards to 1Q Trunk Figure 4-10 Switch 1 Forwards to 1D TrunkSwitch 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 all VLANs. The frame is tagged and transmitted out Port 4.4 EXAMPLE 4, ISOLATING NETWORK TRAFFIC ACCORDING TO PROTOCOL 4.4.1 Solving the Problem Figure 4-11 Example 4, Isolating Trafﬁc According to ProtocolSwitch 3 is set as follows Switch 5 is set as follows Port 2, VLAN ID 6, Protocol AppleTalk 802.1Q VLAN User’s Guide Chapter 4 Examples4-22 INDEX Numerics802.1Q VLAN User’s Guide IndexIndex-2 Index-3 Index802.1Q VLAN User’s Guide 802.1Q VLAN User’s Guide IndexIndex-4