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Chapter 13 Spanning Tree Protocol
XGS-4526/4528F/4728F User’s Guide
151
With MSTP, VLANs 1 and 2 are mapped to different spanning trees in the network.
Thus traffic from the two VLANs travel on different paths. The following figure
shows the network example using MSTP.
Figure 58 MSTP Network Example
13.1.5.2 MST Region
An MST region is a logical grouping of multiple network devices that appears as a
single device to the rest of the network. Each MSTP-enabled device can only
belong to one MST region. When BPDUs enter an MST region, external path cost
(of paths outside this region) is increased by one. Internal path cost (of paths
within this region) is increased by one when BPDUs traverse the region.
Devices that belong to the same MST region are configured to have the same
MSTP configuration identification settings. These include the following parameters:
• Name of the MST region
• Revision level as the unique number for the MST region
• VLAN-to-MST Instance mapping
13.1.5.3 MST Instance
An MST Instance (MSTI) is a spanning tree instance. VLANs can be configured to
run on a specific MSTI. Each created MSTI is identified by a unique number
(known as an MST ID) known internally to a region. Thus an MSTI does not span
across MST regions.
A
B
VLAN 1
VLAN 2
- XGS-4526/4528F/4728F 1
- About This User's Guide 3
- Customer Support 4
- Document Conventions 5
- Icons Used in Figures 6
- Safety Warnings 7
- Contents Overview 9
- Table of Contents 11
- User’s Guide 25
- CHAPTER 1 27
- 1.1.5 IPv6 Support 30
- CHAPTER 2 33
- 2.2.1.1 Precautions 34
- CHAPTER 3 37
- 3.1.2 1000Base-T Ports 38
- 3.1.3 Mini-GBIC Slots 39
- 3.2 Rear Panel 41
- 3.2.3 Uplink Module 42
- 3.2.4 Rear Panel Connections 42
- 3.2.5 Power Connector 43
- 3.2.7 Console Port 44
- 3.3 LEDs 45
- Table 3 LEDs (continued) 46
- CHAPTER 4 47
- LINK DESCRIPTION 51
- 4.5 Switch Lockout 54
- 4.6 Resetting the Switch 54
- 4.8 Help 56
- CHAPTER 5 57
- 5.1.3 Creating a VLAN 59
- 5.1.4 Setting Port VID 61
- 5.1.5 Enabling RIP 62
- CHAPTER 6 63
- Total number of bindings: 1 67
- 6.2.2 Creating a VLAN 68
- 6.2.3 Configuring DHCP Relay 71
- 6.2.4 Troubleshooting 71
- 6.3.1 Configuring Switch A 73
- Chapter 6 Tutorials 74
- 6.3.2 Configuring Switch B 75
- 6.5.1 Creating a Guest VLAN 81
- 6.5.3 Enabling Guest VLAN 84
- 6.6.1 Creating a VLAN 86
- Technical Reference 93
- CHAPTER 7 95
- Table 8 Status 96
- CHAPTER 8 101
- 8.2 System Information 102
- Chapter 8 Basic Setting 103
- LABEL DESCRIPTION 103
- 8.3 General Setup 104
- 8.4 Introduction to VLANs 106
- 8.4.1 Smart Isolation 107
- 8.5 Switch Setup Screen 108
- 8.6 IP Setup 110
- Chapter 8 Basic Setting 112
- 8.7 Port Setup 113
- CHAPTER 9 117
- 9.2.1 GARP 118
- 9.2.2 GVRP 118
- 9.3 Port VLAN Trunking 119
- 9.4 Select the VLAN Type 120
- 9.5 Static VLAN 120
- 9.5.1 VLAN Status 121
- 9.5.2 VLAN Details 122
- Chapter 9 VLAN 125
- 9.6 Subnet Based VLANs 126
- 9.8 Protocol Based VLANs 128
- VLAN Setup 130
- You cannot change it 132
- 1 as the VID 132
- Chapter 9 VLAN 134
- CHAPTER 10 137
- CHAPTER 11 141
- CHAPTER 12 145
- Chapter 12 Filtering 146
- CHAPTER 13 147
- 13.1.2 How STP Works 148
- 13.1.3 STP Port States 149
- 13.1.4 Multiple RSTP 149
- 13.1.5 Multiple STP 150
- 13.1.5.2 MST Region 151
- 13.1.5.3 MST Instance 151
- Protocol 158
- Status 160
- CHAPTER 14 169
- 14.2 Bandwidth Control Setup 170
- Chapter 14 Bandwidth Control 171
- Chapter 14 Bandwidth Control 172
- CHAPTER 15 173
- CHAPTER 16 175
- Chapter 16 Mirroring 176
- CHAPTER 17 177
- 17.2.1 Link Aggregation ID 178
- Chapter 17 Link Aggregation 180
- Chapter 17 Link Aggregation 183
- 17.6 Static Trunking Example 184
- CHAPTER 18 187
- 18.1.2 MAC Authentication 188
- 18.2.2 Guest VLAN 191
- Internet 192
- CHAPTER 19 197
- 19.2 Port Security Setup 198
- 19.3 VLAN MAC Address Limit 199
- Chapter 19 Port Security 200
- CHAPTER 20 201
- Chapter 20 Classifier 203
- Configuration 204
- Table 52 Common IP Ports 205
- 20.4 Classifier Example 206
- CHAPTER 21 207
- Chapter 21 Policy Rule 210
- 21.4 Policy Example 213
- CHAPTER 22 215
- (Weight -1) 216
- 22.2 Configuring Queuing 217
- Chapter 22 Queuing Method 218
- CHAPTER 23 219
- Normal or Access Port 220
- 23.3 VLAN Tag Format 221
- Table 58 802.1Q Frame 222
- 23.4.1 Port-based Q-in-Q 223
- 23.4.2 Selective Q-in-Q 224
- Chapter 23 VLAN Stacking 226
- CHAPTER 24 227
- 24.2 Multicast Status 228
- 24.3 Multicast Setting 229
- Chapter 24 Multicast 230
- Chapter 24 Multicast 231
- 24.4 IGMP Snooping VLAN 232
- 24.5 IGMP Filtering Profile 233
- Profile 234
- 24.6 MVR Overview 235
- 24.6.2 MVR Modes 236
- 24.6.3 How MVR Works 236
- News: 224.1.4.10 ~ 224.1.4.50 240
- Movie: 230.1.2.50 ~230.1.2.60 240
- CHAPTER 25 243
- 25.2 AAA Screens 244
- 25.2.1 RADIUS Server Setup 245
- Chapter 25 AAA 246
- 25.2.3 AAA Setup 249
- Chapter 25 AAA 251
- Table 72 Supported VSAs 252
- (CISCO-AVPAIR) 253
- VLAN ID 253
- CHAPTER 26 259
- 26.2 IP Source Guard 263
- Figure 117 IP Source Guard 264
- Table 77 IP Source Guard 264
- 26.4 DHCP Snooping 266
- Table 79 DHCP Snooping 267
- Chapter 26 IP Source Guard 268
- 26.5 DHCP Snooping Configure 269
- 26.6 ARP Inspection Status 274
- Chapter 26 IP Source Guard 281
- CHAPTER 27 283
- 27.2 Loop Guard Setup 285
- Chapter 27 Loop Guard 286
- CHAPTER 28 287
- 28.2 Enabling VLAN Mapping 288
- Chapter 28 VLAN Mapping 290
- CHAPTER 29 291
- CHAPTER 30 295
- Chapter 30 sFlow 298
- CHAPTER 31 299
- 31.1.2 Sub-Option Format 300
- 31.1.3 Port State 301
- 31.2 The PPPoE Screen 302
- 31.3.1 PPPoE IA Per-Port 303
- Chapter 31 PPPoE 305
- 31.3.3 PPPoE IA for VLAN 307
- Chapter 31 PPPoE 308
- CHAPTER 32 309
- Errdisable Detect screen 310
- Chapter 32 Error Disable 312
- CHAPTER 33 315
- Chapter 33 Private VLAN 317
- Chapter 33 Private VLAN 318
- CHAPTER 34 319
- Chapter 34 Static Route 321
- Chapter 34 Static Route 322
- CHAPTER 35 323
- Chapter 35 Policy Routing 326
- CHAPTER 36 327
- 36.2 Configuring RIP 328
- Chapter 36 RIP 329
- Chapter 36 RIP 330
- CHAPTER 37 331
- 37.1.2 How OSPF Works 332
- 37.1.5 Configuring OSPF 333
- 37.2 OSPF Status 334
- Chapter 37 OSPF 335
- FIELD DESCRIPTION 335
- 37.3 OSPF Configuration 336
- 37.4 Configure OSPF Areas 337
- Chapter 37 OSPF 338
- 37.7 OSPF Virtual-Links 343
- CHAPTER 38 345
- 38.1.1 How IGMP Works 346
- 38.2 Port-based IGMP 347
- 38.3 Configuring IGMP 348
- CHAPTER 39 349
- 39.3 Configuring DVMRP 350
- CHAPTER 40 353
- Policing 354
- 40.3 Activating DiffServ 356
- CHAPTER 41 361
- 41.2 DHCP Status 362
- 41.4 DHCP Relay 364
- 192.168.1.100 366
- DHCP Server: 366
- Chapter 41 DHCP 368
- CHAPTER 42 371
- 42.2 VRRP Status 372
- 42.3 VRRP Configuration 373
- Chapter 42 VRRP 374
- 42.3.2 VRRP Parameters 375
- 172.21.1.100 378
- 172.21.1.1 378
- 172.21.1.10 378
- 42.4.2 Two Subnets Example 379
- CHAPTER 43 381
- 43.1.2.1 ARP-Reply 382
- 43.1.2.2 Gratuitous-ARP 382
- 43.1.2.3 ARP-Request 383
- Chapter 43 ARP Learning 385
- Chapter 43 ARP Learning 386
- CHAPTER 44 387
- Chapter 44 Load Sharing 388
- CHAPTER 45 389
- 45.2 Load Factory Default 390
- 45.3 Save Configuration 390
- 45.4 Reboot System 391
- 45.5 Firmware Upgrade 391
- 45.8 FTP Command Line 393
- 45.8.3 GUI-based FTP Clients 395
- 45.8.4 FTP Restrictions 395
- Chapter 45 Maintenance 396
- CHAPTER 46 397
- 46.3 About SNMP 398
- 46.3.1 SNMP v3 and Security 399
- 46.3.2 Supported MIBs 399
- 46.3.3 SNMP Traps 400
- Chapter 46 Access Control 401
- Chapter 46 Access Control 402
- Table 148 AAA Traps 404
- Table 149 SNMP IP Traps 405
- 46.3.4 Configuring SNMP 407
- > User screen) 408
- 46.5 SSH Overview 413
- 46.6 How SSH works 414
- 46.8 Introduction to HTTPS 415
- 46.9 HTTPS Example 416
- 46.9.3 The Main Screen 419
- CHAPTER 47 423
- Chapter 47 Diagnostic 424
- CHAPTER 48 425
- 48.2 Syslog Setup 426
- 48.3 Syslog Server Setup 427
- 48.4 Syslog Messages 428
- Table 161 Syslog Messages 429
- CHAPTER 49 435
- Chapter 49 Cluster Management 438
- CHAPTER 50 443
- 50.2 Viewing the MAC Table 444
- Chapter 50 MAC Table 445
- Chapter 50 MAC Table 446
- CHAPTER 51 447
- 51.2 Viewing the IP Table 448
- Chapter 51 IP Table 449
- Chapter 51 IP Table 450
- CHAPTER 52 451
- 52.2 The ARP Table Screen 452
- CHAPTER 53 453
- Chapter 53 Routing Table 454
- CHAPTER 54 455
- Chapter 54 Configure Clone 456
- CHAPTER 55 457
- 55.2 Switch Access and Login 458
- 55.3 Switch Configuration 461
- Chapter 55 Troubleshooting 462
- CHAPTER 56 463
- FEATURE DESCRIPTION 464
- STANDARD DESCRIPTION 470
- APPENDIX A 473
- Appendix A Common Services 474
- Appendix A Common Services 475
- APPENDIX B 477
- FCC Warning 478
- CE Mark Warning: 478
- Warning: 478
- Notices 478
- ZyXEL Limited Warranty 479
- Appendix B Legal Information 480
- Numerics 481
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