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Introduction to the BayStack 410-24T Switch
309985-C Rev 00
1-45
To connect multiple VLANs across switches with redundant links, the STP must
be disabled on all participating switch ports. Figure 1-24
shows possible
consequences of enabling the STP when using VLANs between untagged
(non-802.1Q tagged) switches.
Figure 1-24. Possible Problems with VLANs and Spanning Tree Protocol
As shown in Figure 1-24, with STP enabled, only one connection between S1 and
S2 is forwarding at any time. Communications failure occurs between VLAN 2 of
S1 and VLAN 2 of S2, blocking communications between Stations A and B.
The link connecting VLAN 1 on Switches S1 and S2 is selected as the forwarding
link based on port speed, duplex mode, and port priority. Because the other link
connecting VLAN 2 is placed into Blocking mode, stations on VLAN 2 in switch
S1 cannot communicate with stations in VLAN 2 on switch S2. With multiple
links only one link will be forwarding.
S2
S1
VLAN 1 VLAN 2
VLAN 1 VLAN 2
Blocking
Station A
No
Communications
Station B
Forwarding
Non-802.1Q
tagged switch
BS41022A
Non-802.1Q
tagged switch
- Using the BayStack 410-24T 1
- 10BASE-T Switch 1
- Trademarks 2
- Statement of Conditions 2
- USA Requirements Only 2
- European Requirements Only 2
- Taiwan Requirements 3
- Canada Requirements Only 3
- Contents 7
- 309985-C Rev 00 10
- Audience 24
- Organization 24
- Text Conventions 25
- Acronyms 26
- Related Publications 28
- How to Get Help 29
- Chapter 1 31
- Front Panel 32
- 410-24T Switch 34
- Back Panel 36
- Features 39
- Security 43
- IEEE 802.1p 46
- IGMP Snooping Feature 47
- Flash Memory Storage 47
- Configuration Parameters 48
- MultiLink Trunking 49
- IEEE 802.1Q VLANs 49
- Port Mirroring 49
- SNMP MIB Support 51
- SNMP Trap Support 51
- Network Configuration 52
- Segment Switch Application 54
- CPU PS1 PS2FAN 55
- Fail-Safe Stack Application 56
- Stack Operation 57
- Cascade A Out 59
- Cascade A In 59
- Unit Select 59
- Cascade A InUnit Select 60
- Base Unit 61
- Stack Configurations 63
- IEEE 802.1Q VLAN Workgroups 68
- IEEE 802.1Q Tagging 69
- Shared Servers 76
- (Port Name is 80
- VLAN Workgroup Summary 81
- VLAN Configuration Rules 83
- IGMP Snooping 84
- IEEE 802.1p Prioritizing 89
- MultiLink Trunks 93
- Before Configuring Trunks 105
- 400-4FX MDA 107
- Chapter 2 119
- Figure 2-1. Package Contents 120
- Installation Procedure 121
- Caution: 122
- Comm Port 129
- Connecting Power 130
- Cascade Module 131
- 100-240V 131
- 47-63Hz~ 131
- Redundant Power 131
- Verifying the Installation 132
- Initial Setup 135
- Stack Setup 138
- Chapter 3 143
- Using the Console Interface 143
- Main Menu 146
- IP Configuration/Setup 150
- Choosing a BootP Request Mode 152
- BootP Disabled 153
- BootP or Last Address 153
- BootP When Needed 154
- BootP Always 154
- SNMP Configuration 155
- System Characteristics 157
- Switch Configuration 160
- MAC Address Table 163
- MAC Address-Based Security 165
- and 3-11) 170
- Configuration screen 171
- Screen 1 174
- Screen 2 174
- Screen 3 174
- Screen 4 174
- Screen 5 174
- Screen 16 178
- VLAN Configuration Menu 181
- Table 3-12 describes the 182
- Table 3-14 187
- Table 3-15. Reserved PIDs 188
- Port Configuration 195
- Table 3-19 describes the 196
- MultiLink Trunk Configuration 200
- Table 3-21 describes the 201
- Table 3-23 describes the 206
- Port Mirroring Configuration 207
- Table 3-24 describes the 208
- Table 3-25. Monitoring Modes 210
- Rate Limiting Configuration 211
- IGMP Configuration Menu 214
- Table 3-29 describes the 220
- Port Statistics 221
- ATM Configuration Menu 225
- Renumber Stack Units 243
- Hardware Unit Information 245
- Spanning Tree Configuration 245
- Software Download 256
- Download screen 257
- Configuration File 260
- Display Event Log 263
- Excessive Bad Entries 264
- Write Threshold 265
- Flash Update 265
- Save Current Settings 266
- Reset to Default Settings 269
- Chapter 4 273
- Troubleshooting 273
- Interpreting the LEDs 274
- Warning: 276
- Normal Power-Up Sequence 277
- Port Connection Problems 278
- Software Download Error Codes 280
- Appendix A 283
- Technical Specifications 283
- Physical Dimensions 284
- Performance Specifications 284
- Data Rate 285
- Interface Options 285
- Safety Agency Certification 285
- Electromagnetic Emissions 285
- Electromagnetic Immunity 286
- Declaration of Conformity 286
- Appendix B 287
- Media Dependent Adapters 287
- 400-4TX MDA 288
- 100BASE-FX MDAs 289
- 400-2FX MDA 290
- Installing an MDA 292
- Replacing an MDA 293
- Appendix C 295
- Quick Steps to Features 295
- Configuring 802.1Q VLANs 296
- Off-page reference 297
- On-page reference 297
- Configuring MultiLink Trunks 302
- Configuring Port Mirroring 303
- Configuring IGMP Snooping 305
- Appendix D 309
- MDI and MDI-X Devices 310
- Appendix E 315
- Default Settings 315
- Appendix F 323
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