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How It Works
A-2 Generic Attribute Registration Protocol (GARP)
A.2 HOW IT WORKS
In Figure A-1, Switch 4, port 1 is registered as being a member of VLAN Blue and then declares
this fact out all its ports (2 and 3) to Switch 1 and Switch 2. These two switches register this in the
Port VLAN Lists of the ports (Switch 1, port 1 and Switch 2, port 1) that received the frames with
the information. Switch 2, which is connected to Switch 3 and Switch 5 declares the same
information to those two switches and the Port VLAN List of each port is updated with the new
information, accordingly.
Figure A-1 Example of VLAN Propagation via GVRP
Configuring a VLAN on an 802.1Q switch creates a static GVRP entry. The entry will always
remain registered and will not time out. However, dynamic entries will time-out and their
registrations are removed from the member list if the end station A is removed. This ensures that if
switches are disconnected, or if end stations are removed, the registered information remains
accurate.
The end result is that the Port VLAN List of a port is updated with information about VLANs that
reside off that port, even if the actual station on the VLAN is several hops away.
D
End
Station A
Switch 1 Switch 2
Switch 3
Switch 4 Switch 5
R
R
R
R
D
D
D
= Port registered as a member of VLAN Blue
= Port declaring VLAN Blue
D
R
2599_19
1
1
1
1
1
2
2
3
3
R
- Matrix E7 Series and 1
- Local Management User’s Guide 1
- ENTERASYS NETWORKS, INC 4
- PROGRAM LICENSE AGREEMENT 4
- Contents 7
- CHASSIS MENU SCREENS 8
- NETWORK TOOLS SCREENS 12
- ABOUT IGMP 13
- About This Guide 21
- STRUCTURE OF THIS GUIDE 22
- Structure of This Guide 23
- About This Guide xvi 23
- RELATED DOCUMENTS 24
- DOCUMENT CONVENTIONS 24
- About This Guide xviii 25
- Introduction 27
- Overview 28
- 1-2 Introduction 28
- 1.1.1 The Management Agent 29
- 1.1.2 In-Band vs. Out-of-Band 29
- Local Management Requirements 30
- 1-4 Introduction 30
- Introduction 1-5 31
- Event Message Field 32
- Heading Field 32
- Display Fields 33
- Input Fields 33
- Selection Fields 33
- Command Fields 33
- 1-8 Introduction 34
- Key Function 34
- 1.6 GETTING HELP 35
- 6H252-17 38
- Fast Enet 38
- Management Terminal Setup 39
- Table 2-1 VT Terminal Setup 39
- 2.2 TELNET CONNECTIONS 40
- Accessing Local Management 43
- * Refer to the SmartTrunk 45
- Using the Exit Command 46
- Using the RETURN Command 47
- 3.2 PASSWORD SCREEN 48
- 3.3 MAIN MENU SCREEN 50
- 3.4 MODULE SELECTION SCREEN 51
- 3.4.1 Selecting a Module 53
- MODULE CONFIGURATION MENU 54
- MODULE STATISTICS MENU 54
- NETWORK TOOLS 54
- SECURITY 54
- Module Menu Screen 56
- Overview of Security Methods 58
- Term Definition 61
- Authentication 64
- • Frames are discarded 67
- • Neither method performs 67
- 3.7 SECURITY MENU SCREEN 68
- Security Menu Screen 70
- 3.8 PASSWORDS SCREEN 71
- Radius Configuration Screen 75
- EAP Statistics Menu Screen 89
- Use this field… To… 100
- Chassis Menu Screens 101
- 4.1 CHASSIS MENU SCREEN 102
- When to Use 102
- How to Access 102
- Screen Example 102
- Menu Descriptions 103
- Field Descriptions 105
- 4.2.1 Setting the IP Address 106
- 4.2.2 Setting the Subnet Mask 107
- Chassis Configuration Screen 109
- Chassis Menu Screens 4-9 109
- 4046_102 110
- SNMP TRAPS CONFIGURATION 110
- 4-22 Chassis Menu Screens 122
- Chassis Menu Screens 4-25 125
- Screen Navigation Paths 127
- General Configuration Screen 133
- 5.2.1 Setting the IP Address 134
- 5.2.2 Setting the Subnet Mask 135
- 5.2.5 Setting the Module Name 138
- 5.2.6 Setting the Module Date 138
- 5.2.7 Setting the Module Time 139
- THIS COM PORT? 141
- 5.2.11 Clearing NVRAM 142
- 5.6.1 Entering IP Addresses 154
- 5.6.2 Enable/Disable ACL 155
- Usage Notes 188
- Definitions to Know 189
- 6.8.1 802.3ad Port Screen 193
- ActorOperState 198
- PartnerAdminKey 199
- PartnerAdminState (hex) 199
- PartnerOperKey 199
- PartnerOperState 199
- Displaying Port Statistics 200
- Displaying Aggregator Details 205
- 6.8.3 802.3ad System Screen 208
- 6.9.1 Setting the Threshold 211
- 6.9.2 Setting the Reset Peak 212
- Screen Navigation Path 213
- SPANNING TREE CONFIGURATION 217
- 40461_06 230
- Menu Item Screen Function 233
- 8.3.1 Creating a Static VLAN 236
- 8.3.3 Renaming a Static VLAN 237
- 8.3.4 Deleting a Static VLAN 237
- 36502_05 246
- 8.7.1 Changing the Port Mode 248
- Classification Rule 250
- 8.8.4 Deleting Line Items 262
- command field 266
- 100%, as shown 279
- 9.7.2.1 Solving the Problem 301
- 9.8.1 Configuring a Port 307
- 11.2 SWITCH STATISTICS SCREEN 324
- Interface Statistics Screen 328
- 11.4 RMON STATISTICS SCREEN 330
- RMON Statistics Screen 333
- Network Tools Screens 337
- HSIM-A6DP or VHSIM2-A6DP 339
- 12.2 BUILT-IN COMMANDS 340
- Examples: 341
- Built-in Commands 342
- 12-6 Network Tools Screens 342
- Network Tools Screens 12-7 343
- 12-8 Network Tools Screens 344
- Network Tools Screens 12-9 345
- 12-10 Network Tools Screens 346
- Network Tools Screens 12-11 347
- 12-12 Network Tools Screens 348
- Network Tools Screens 12-13 349
- 12-14 Network Tools Screens 350
- Network Tools Screens 12-15 351
- 12-16 Network Tools Screens 352
- Network Tools Screens 12-17 353
- 12-18 Network Tools Screens 354
- Network Tools Screens 12-19 355
- 12-20 Network Tools Screens 356
- Network Tools Screens 12-21 357
- (Contiued) 358
- Network Tools Screens 12-23 359
- 12-24 Network Tools Screens 360
- Network Tools Screens 12-25 361
- (Cont’d) 362
- Network Tools Screens 12-27 363
- 12-28 Network Tools Screens 364
- Network Tools Screens 12-29 365
- 12-30 Network Tools Screens 366
- Network Tools Screens 12-31 367
- 12-32 Network Tools Screens 368
- 12-34 Network Tools Screens 370
- Network Tools Screens 12-35 371
- 12-36 Network Tools Screens 372
- Network Tools Screens 12-37 373
- 12-38 Network Tools Screens 374
- Network Tools Screens 12-39 375
- Solving the Problem 376
- 12.5 SPECIAL COMMANDS 377
- Special Commands 378
- 12-42 Network Tools Screens 378
- 13.1 DEFINING VLANs 380
- 22631-01 381
- Member of Sales Network 381
- Member of Finance Network 381
- 13.2 TYPES OF VLANs 382
- 13.2.1 802.1Q VLANs 382
- 13.2.2 Other VLAN Strategies 382
- 13.4 VLAN TERMS 383
- 13.5 VLAN OPERATION 385
- 13.5.1 Description 385
- 13.5.2 VLAN Components 385
- Stations 385
- Switches 386
- 13.6 CONFIGURATION PROCESS 386
- 13.6.1 Defining a VLAN 386
- Untagged Frames 388
- Tagged Frames 388
- 13.7.2 Forwarding Decisions 388
- 13.7.2.2 Known Unicasts 389
- 13.8 VLAN CONFIGURATION 389
- 13.8.1 Managing the Switch 389
- 13.8.2 Switch Without VLANs 389
- 802.1Q Switch 390
- 40462_95 393
- 13.10 QUICK VLAN WALKTHROUGH 394
- Quick VLAN Walkthrough 396
- 13.11 EXAMPLES 399
- • For the Red VLAN 400
- • For the Blue VLAN 400
- VLAN ID 002 401
- VLAN ID 003VLAN ID 002 401
- VLAN ID 003 401
- 13.12.2 Frame Handling 402
- User 802.1D Legacy Bridge 403
- File Server 403
- 802.1Q VLAN Aware Switch 403
- 13.13.1 Solving the Problem 404
- Switch 4 404
- Switch 2 405
- • Port 3 is set as follows: 406
- • Egress: Port 2: TAGGED 406
- • Port 2 is set as follows: 406
- 13.13.2 Frame Handling 407
- Bridge 1 Bridge 2 408
- Bridge 3 408
- Bridge 4 408
- Port 25 Port 25 410
- TO SUBNET 411
- 13.15.1 Solving the Problem 412
- Switch 1 412
- CLASSIFICATION RULES 414
- 13.17.1 Solving the Problem 414
- A.1 OPERATION 417
- A.2 HOW IT WORKS 418
- About IGMP 419
- B-2 About IGMP 420
- Detecting Multicast Routers 421
- About IGMP B-3 421
- Numerics 423
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