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Spanning-Tree Operation
The RSTP (802.1w) and STP (802.1D) Spanning Tree Options
dant links by using a port trunk. The following example shows how you can
use a port trunk with 802.1Q (tagged) VLANs and spanning tree without
unnecessarily blocking any links or losing any bandwidth.
Problem:
STP enabled with 2
separate (non-trunked)
links blocks a VLAN link.
Solution:
STP enabled with
one trunked link.
Nodes 1 and 2 cannot
communicate because
STP is blocking the link.
Nodes 1 and 2 can communicate because STP
sees the trunk as a single link and 802.1Q (tagged)
VLANs enable the use of one (trunked) link for
both VLANs.
Figure 5-3. Example of Using a Trunked Link with STP and VLANs
5-10
- ProCurve Switches 1
- ProCurve 3
- Switch 2610 Series 3
- Switch 2610-PWR Series 3
- 3 GVRP 6
- 5 Spanning-Tree Operation 8
- Effectively 9
- 7 IP Routing Features 11
- 8 ProCurve Stack Management 12
- Product Documentation 15
- Software Feature Index 16
- Getting Started 21
- Conventions 22
- Command Prompts 23
- Screen Simulations 23
- Sources for More Information 24
- Need Only a Quick Start? 25
- Static Virtual LANs (VLANs) 27
- ProCurve Switch 32
- Overview of Using VLANs 33
- Multiple VLAN Considerations 36
- 2610 Switch 41
- Multiple-Forwarding 41
- Database Switch 41
- Adding or Editing VLAN Names 43
- Default VLAN 44
- Changing the Primary VLAN 52
- 802.1Q VLAN Tagging 56
- The Secure Management VLAN 60
- Preparation 62
- IP Interfaces 65
- VLAN MAC Addresses 65
- VLAN Restrictions 66
- Jumbo Packet Support 66
- General Operation 70
- GVRP Enabled 73
- (Required for Unknown 73
- VLAN operation.) 73
- Unknown VLAN Settings 73
- Default: 73
- Joining 74
- GVRP and VLAN Access Control 76
- Planning for GVRP Operation 77
- Configuring GVRP On a Switch 77
- GVRP Operating Notes 83
- IGMP Features 87
- IGMP Terms 88
- IGMP Operating Features 89
- ProCurve(vlan-1)# ip igmp 92
- ■ Ports A1 - A2: Auto 93
- ■ Ports A3 - A4: Forward 93
- ■ Ports A5 - A6: Block 93
- IGMP Operating Notes 96
- Supported Standards and RFCs 97
- Automatic Fast-Leave IGMP 98
- Forced Fast-Leave IGMP 101
- . The following commands now 102
- Note on VLAN 103
- Numbers 103
- How IGMP Operates 104
- 6 specifies port A6 104
- 49 indicates port C1 105
- Using the Switch as Querier 106
- Multicast Filtering 107
- Spanning-Tree Operation 109
- Contents 110
- Overview 111
- Table 5-4. 802.1s Features 112
- 10, 11, 12 Yes No 113
- 20, 21, 22 No Yes 113
- Region “A”: Logical Topology 114
- Spanning Tree Options 115
- RSTP (802.1w) 116
- STP (802.1D) 116
- How STP and RSTP Operate 117
- Spanning Tree (RSTP) 119
- Configuring RSTP 121
- CLI: Configuring RSTP 122
- Menu: Configuring RSTP 128
- [Device Features] 130
- Menu: Configuring 802.1D STP 131
- *) at the 132
- CLI: Configuring 802.1D STP 134
- STP Fast Mode 138
- Mode = Uplink) only on the 140
- Terminology 141
- Operating Notes 152
- MSTP Structure 155
- How MSTP Operates 157
- Region “X” 158
- Spanning Tree (CST) 159
- Operating Rules 162
- Steps for Configuring MSTP 165
- Parameters 167
- Command Page 180
- Displaying MSTP Statistics 182
- Troubleshooting 189
- Bandwidth More Effectively 191
- Introduction 193
- • IP-device (address) 194
- • VLAN-ID (VID) 194
- • Source-Port 194
- Note On Using 199
- Multiple 199
- Criteria 199
- Planning a QoS Configuration 205
- QoS UDP/TCP Priority 211
- ■ 802.1p priority 212
- Combining 214
- Policy Types 214
- The DSCPs for this 216
- 802.1p priority level 216
- DSCP Policies 217
- Configured in this Step 217
- Classifier 217
- DSCP Policy 217
- QoS IP-Device Priority 218
- No-override) 221
- Configured in this step 223
- Default ToS Configuration 225
- Current ToS Configuration 225
- No-override. Note that 228
- Assignments 229
- ToS Option: 235
- QoS VLAN-ID (VID) Priority 236
- No- override 237
- Priorities 241
- Configured 241
- QoS Source-Port Priority 242
- In this instance, No 243
- No-override. See figure 6 245
- Configured in 247
- Effect of “No-override” 251
- QoS Messages in the CLI 255
- IP Routing Features 259
- Overview of IP Routing 261
- IP Tables and Caches 262
- IP Route Table 263
- IP Forwarding Cache 263
- Switches 266
- Enabling Proxy ARP 270
- Configuring ICMP 272
- Configuring Static IP Routes 274
- Static Route Types 275
- Static IP Route Parameters 275
- Configuring a “Null” Route 277
- Configuring IRDP 280
- Enabling IRDP Globally 281
- Displaying IRDP Information 283
- Configuring DHCP Relay 284
- Enabling DHCP Relay 285
- Configuring a Helper Address 285
- DHCP Option 82 286
- Option 82 Server Support 287
- Option 82 Field Content 290
- Forwarding Policies 292
- Multinetted VLANs 296
- UDP Broadcast Forwarding 300
- Configuration 304
- ProCurve Stack Management 307
- Operation 310
- General Stacking Operation 312
- Operating Rules for Stacking 313
- Specific Rules 314
- Configuring Stack Management 316
- ■ No Manager password 317
- Configure Stacking 319
- [3] to select Stack 320
- [E] (for Edit). Then 320
- [E] (for Edit) 323
- [Tab] to select the 323
- [B] (for Back) to return to 327
- Another Stack 331
- Monitoring Stack Status 332
- Stacking 336
- Big_Waters 340
- Yes. When 342
- SN of 2, you 344
- MAC Address for 345
- Stack Commander 345
- Auto Join disabled 346
- Transmission Interval 351
- [?] in the web 352
- Status Messages 353
- Numerics 355
- 2 – Index 356
- Index – 3 357
- 4 – Index 358
- Index – 5 359
- 6 – Index 360
- Index – 7 361
- 8 – Index 362
- Development Company, L.P 364
- December 2007 364
- Manual Part Number 364
- 5991-8641 364
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