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Multiple Instance Spanning-Tree Operation
Overview
Multiple-Instance spanning tree operation (802.1s) ensures that only one
active path exists between any two nodes in a spanning-tree instance. A
spanning-tree instance comprises a unique set of VLANs, and belongs to a
specific spanning-tree region. A region can comprise multiple spanning-tree
instances (each with a different set of VLANs), and allows one active path
among regions in a network. Applying VLAN tagging to the ports in a multiple-
instance spanning-tree network enables blocking of redundant links in one
instance while allowing forwarding over the same links for non-redundant use
by another instance.
For example, suppose you have three switches in a region configured with
VLANs grouped into two instances, as follows:
VLANs Instance 1 Instance 2
10, 11, 12 Yes No
20, 21, 22 No Yes
4-4
- HP ProCurve Switch Software 1
- March 2010 3
- K.14.52 3
- 3 GVRP 7
- 5 Switch Meshing 9
- . . . 6-49 11
- 8 QinQ (Provider Bridging) 13
- Product Documentation 17
- Software Feature Index 18
- Intelligent Edge Software 19
- Features 19
- Getting Started 25
- Conventions 26
- Command Prompts 27
- Screen Simulations 27
- Sources for More Information 28
- Online Help 30
- Need Only a Quick Start? 31
- Network 32
- Static Virtual LANs (VLANs) 33
- Port-Based VLANs 38
- Protocol-Based VLANs 38
- Designated VLANs 38
- Static VLAN Operation 40
- VLAN Environments 41
- VLAN Operation 42
- Routing Options for VLANs 43
- Overlapping (Tagged) VLANs 44
- VLAN Operating Rules 47
- Multiple VLAN Considerations 52
- Correct It 54
- Switch 8000M 55
- 8212zl Switch 55
- (Routing Enabled) 55
- Adding or Editing VLAN Names 58
- Default VLAN 59
- [E] (for Edit) 61
- Parameters 62
- Syntax: 68
- “Show VLANs Custom” Command 71
- [ voice] 74
- [Vlan Configuration] 77
- [Add/Remove VLANs] 77
- 802.1Q VLAN Tagging 78
- ■ In switch X: 79
- ■ In switch Y: 79
- VID Numbers 80
- Special VLAN Types 83
- The Secure Management VLAN 84
- Preparation 86
- Deleting the Management VLAN 91
- Voice VLANs 92
- IP Interfaces 95
- VLAN MAC Address 95
- Port Trunks 95
- Port Monitoring 95
- Jumbo Packet Support 95
- VLAN Restrictions 96
- MAC Configuration 97
- Address 99
- Interval 100
- Example 101
- Contents 103
- Overview 104
- Introduction 105
- General Operation 106
- “Unknown VLANs” 109
- GVRP Enabled 110
- (Required for Unknown 110
- VLAN operation.) 110
- Unknown VLAN Settings 110
- Default: 110
- Advertising and Joining 111
- GVRP and VLAN Access Control 113
- Planning for GVRP Operation 114
- Configuring GVRP On a Switch 115
- GVRP Operating Notes 120
- 10, 11, 12 Yes No 126
- 20, 21, 22 No Yes 126
- Region “A”: Logical Topology 127
- MSTP Structure 129
- How MSTP Operates 131
- Region “X” 132
- Common Spanning Tree (CST) 133
- Problem: 134
- Solution: 134
- Terminology 135
- Operating Rules 137
- Configuring MSTP 139
- Rapid State 140
- Transitions 140
- MSTP Configuration Overview 141
- Configuring BPDU Filtering 152
- Configuring BPDU Protection 153
- Specifying the port displays 155
- Protection Enabled (Yes) 160
- Configuration 175
- Instance-Specific Data 181
- Port Settings for the 181
- Refer to the “Note”, above 182
- CIST Instance 189
- Instance 190
- Loop Protection 196
- Configuring Loop Protection 197
- Switch Meshing 199
- Switch Meshing Fundamentals 202
- Configuring Switch Meshing 207
- Viewing Switch Mesh Status 210
- Flooded Traffic 214
- Note on the Edge 217
- Port Mode in MSTP 217
- Static VLANs 218
- Dynamic VLANs 219
- Jumbo Packets 219
- Mesh Design Optimization 220
- Effectively 223
- QoS Terminology 229
- QoS Operation 231
- Globally-Configured QoS 232
- Classifier-Based QoS 233
- QoS Packet Classification 234
- QoS Traffic Marking 236
- Layer 3 DSCP Marking 238
- Global QoS 240
- Settings 240
- Global QoS Restrictions 244
- Global TCP/UDP Classifier 246
- The DSCP codepoints 252
- Global IP-Device Classifier 255
- IP-Precedence Classifier 266
- The DSCPs for this 273
- 802.1p priority level 273
- Global VLAN-ID Classifier 278
- Classifier-Based QoS Model 293
- DSCP-802.1p 301
- Mapping 301
- (DSCP) Mapping 310
- QoS Queue Configuration 317
- Switches 323
- General Stacking Operation 325
- Operating Rules for Stacking 327
- Specific Rules 328
- Configuring Stack Management 329
- and Configure Stacking 333
- [E] (for Edit). Then 334
- [B] (for Back) to return to 340
- [Return] 344
- Monitoring Stack Status 345
- Stacking 349
- Big_Waters 353
- Yes. When 355
- SN of 2, you 357
- MAC Address for 358
- Stack Commander 358
- Auto Join parameter 360
- The switch number 362
- (SN) for the “North 362
- Sea” switch is “3” 362
- Transmission Interval 364
- Status Messages 365
- QinQ (Provider Bridging) 367
- How QinQ Works 371
- Features and Benefits 371
- QinQ Mixed Vlan Mode 374
- Configuring VLANs 374
- Untagged) 375
- Tagged) 375
- Configuring QinQ 379
- Enabling QinQ 380
- Setting up S-VLANs 380
- Configuring Port-Types 382
- Configuration Example 383
- Provider 384
- Updating QinQ Configurations 388
- Vlan Mode) 389
- Show Commands for QinQ 390
- Show Commands for VLANs 391
- SNMP Support and MIB Objects 399
- Creating a Traffic Class 406
- > are as follows: 409
- — Matches packets received 410
- — Matches 410
- Optional ICMP Match Criteria 415
- Optional IGMP Match Criteria 418
- Creating a Service Policy 426
- Where to Go From Here 435
- Numerics 437
- 2 – Index 438
- Index – 3 439
- 4 – Index 440
- Index – 5 441
- 6 – Index 442
- Index – 7 443
- 8 – Index 444
- Index – 9 445
- 10 – Index 446
- Index – 11 447
- 12 – Index 448
- ProCurve 5400zl Switches 450
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