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SmartSwitch Router User Reference Manual 29
Chapter 3: Bridging Configuration Guide
Setting the Bridge Priority
You can globally configure the priority of an individual bridge when two bridges tie for
position as the root bridge, or you can configure the likelihood that a bridge will be
selected as the root bridge. The lower the bridge's priority, the more likely the bridge will
be selected as the root bridge. This priority is determined by default; however, you can
change it.
To set the bridge priority, enter the following command in Configure mode:
Setting a Port Priority
You can set a priority for an interface. When two bridges tie for position as the root bridge,
you configure an interface priority to break the tie. The bridge with the lowest interface
value is elected.
To set an interface priority, enter the following command in Configure mode:
Assigning Port Costs
Each interface has a port cost associated with it. By convention, the port cost is 1000/data
rate of the attached LAN, in Mbps. You can set different port costs.
To assign port costs, enter the following command in Configure mode:
Set the bridge priority for default
spanning tree.
stp set bridging priority <num>
Set the bridge priority for a
particular instance of spanning tree.
pvst set bridging spanning-tree <string>
priority <num>
Establish a priority for a specified
interface for default spanning tree.
stp set port <port-list> priority <num>
Establish a priority for a specified
interface for a particular instance of
spanning tree.
pvst set port <port-list> spanning-tree
<string> priority <num>
Set a different port cost other than
the defaults for default spanning
tree.
stp set port <port-list> port-cost <num>
Set a different port cost other than
the defaults for a particular instance
of spanning tree.
pvst set port <port-list> spanning-tree
<string> port-cost <num>
- SmartSwitch Router 1
- User Reference Manual 1
- Electromagnetic 3
- Compatibility (EMC) 3
- FCC Compliance Statement 3
- VCCI Compliance Statement 4
- Cabletron Systems, Inc 6
- Cabletron Systems Limited 10
- Program License Agreement 10
- Declaration of Conformity 12
- Addendum 12
- Contents 13
- About This Manual 27
- Chapter 1 29
- Introduction 29
- Command Modes 30
- Chapter 1: Introduction 31
- Line Editing Commands 33
- Command Resulting Action 34
- Port Names 37
- Chapter 2 39
- Hot Swapping 39
- Line Cards and 39
- Control Modules 39
- Hot Swapping Line Cards 40
- Removing the Line Card 41
- Installing a New Line Card 41
- SSR-CM2 CONTROL MODULE 42
- Removing the Control Module 43
- Installing a Control Module 43
- Offline LED 44
- Hot Swap Button 44
- Chapter 3 47
- Bridging 47
- VLAN Overview 48
- SSR VLAN Support 50
- Configuring Spanning Tree 54
- Configuring VLAN Trunk Ports 57
- Configuring Layer-2 Filters 58
- Monitoring Bridging 59
- VLAN ID 5 60
- Chapter 4 61
- SmartTRUNK 61
- Configuring SmartTRUNKs 62
- Monitoring SmartTRUNKs 63
- Chapter 5 67
- ATM Configuration 67
- Service Class Definition 68
- Cell Scrambling 71
- Cell Mapping 72
- Creating a Non-Zero VPI 73
- ATM Sample Configuration 1 78
- Creating a Virtual Channel 79
- Defining an ATM Service Class 79
- Applying an ATM Service Class 80
- Configuring an IP Route 80
- Chapter 6 83
- Packet-over-SONET 83
- 20.11.11.21 port so.13.1 85
- <protecting-port> 86
- Monitoring PoS Ports 88
- Chapter 7 93
- Configuring DHCP 94
- Updating the Lease Database 96
- Monitoring the DHCP Server 96
- DHCP Configuration Examples 97
- Configuring Secondary Subnets 98
- Interacting with Relay Agents 100
- Chapter 8 103
- IP Routing 103
- Configuration 103
- Multicast Routing Protocols 104
- Configuring Jumbo Frames 106
- Configuring DNS Parameters 110
- Configuring IP Helper 110
- Configuring Direct Broadcast 111
- Monitoring IP Parameters 112
- Configuring Router Discovery 113
- Configuration Examples 116
- Chapter 9 117
- Basic VRRP Configuration 118
- Symmetrical Configuration 119
- Multi-Backup Configuration 121
- 10.0.0.1/16 122
- 10.0.0.2/16 122
- 10.0.0.3/16 122
- Additional Configuration 125
- Monitoring VRRP 127
- VRRP Configuration Notes 129
- Chapter 10 131
- RIP Configuration 131
- Enabling and Disabling RIP 132
- Configuring RIP Interfaces 132
- Configuring RIP Parameters 132
- Monitoring RIP 134
- Configuration Example 135
- ! Change default metric-out 136
- Chapter 11 137
- Configuring OSPF 138
- Enabling OSPF 139
- Configuring an OSPF Area 141
- Creating Virtual Links 142
- Advertisements 143
- Monitoring OSPF 144
- OSPF Configuration Examples 146
- ASE routes into RIP 149
- A r e a 150.20.0.0 150
- Chapter 12 151
- BGP Configuration 151
- Basic BGP Tasks 152
- Setting the Router ID 153
- Configuring a BGP Peer Group 153
- Starting BGP 155
- BGP Configuration Examples 158
- BGP Peering Session Example 159
- IBGP Configuration Example 161
- AS-64801 163
- IBGP Internal Group Example 165
- 17.122.128.2/24 166
- 17.122.128.1/24 166
- Community Attribute Example 171
- Physical Link 173
- Peering Relationship 173
- Information Flow 173
- Local Preference Examples 178
- EBGP Aggregation Example 182
- Route Reflection Example 183
- 192.68.222.1 184
- 192.68.20.2 184
- 192.68.20.1 184
- 172.16.30.2 184
- Chapter 13 187
- Routing Policy 187
- Preference 188
- Import Policies 189
- Export Policies 190
- Specifying a Route Filter 191
- Aggregates and Generates 192
- Authentication 194
- Redistributing Static Routes 196
- Redistributing RIP into RIP 197
- Redistributing RIP into OSPF 197
- Redistributing OSPF to RIP 197
- Creating an Export Source 203
- Creating an Import Source 204
- Creating a Route Filter 204
- Creating an Aggregate Route 205
- Creating an Aggregate Source 206
- Examples of Import Policies 206
- Examples of Export Policies 213
- Chapter 14 223
- Multicast Routing 223
- DVMRP Overview 224
- Configuring IGMP 225
- Configuring DVMRP 226
- Starting and Stopping DVMRP 227
- Configuring DVMRP Parameters 227
- Monitoring IGMP & DVMRP 229
- IP Policy-Based 233
- Forwarding 233
- Chapter 15 233
- Configuring IP Policies 234
- Firewall Load Balancing 240
- Monitoring IP Policies 241
- Chapter 16 245
- Network Address 245
- Translation 245
- Configuring NAT 246
- Forcing Flows through NAT 247
- Managing Dynamic Bindings 248
- NAT and DNS 248
- NAT and ICMP Packets 249
- NAT and FTP 249
- Monitoring NAT 250
- Dynamic Configuration 251
- Dynamic NAT with DNS 254
- Chapter 17 257
- Web Hosting 257
- Load Balancing 258
- Session Persistence 259
- Persistence 260
- Default Binding 260
- Setting Server Status 263
- Load Balancing and FTP 264
- Real Server 267
- TCP Port 267
- Destination 268
- Server IP 268
- Web Caching 270
- Other Configurations 272
- Monitoring Web-Caching 273
- Chapter 18 275
- IPX Routing 275
- Configuring IPX RIP & SAP 277
- Configuring IPX Routing 279
- Configuring Static Routes 280
- Monitoring an IPX Network 283
- Chapter 19 285
- Access Control List 285
- ACL Basics 286
- How ACL Rules are Evaluated 288
- Implicit Deny Rule 288
- Creating and Modifying ACLs 290
- Using ACLs 292
- Applying ACLs to Services 293
- Using ACLs as Profiles 294
- Enabling ACL Logging 299
- Monitoring ACLs 300
- Chapter 20 301
- Security 301
- Configuring RADIUS 302
- Configuring TACACS 303
- Configuring TACACS Plus 304
- Layer-2 Security Filters 305
- Layer-2 Filter Examples 309
- Chapter 21 317
- QoS Configuration 317
- Precedence for Layer-3 Flows 319
- SSR Queuing Policies 319
- Configuring Layer-2 QoS 320
- 802.1p Priority Mapping 320
- Configuring IP QoS Policies 322
- Configuring IPX QoS Policies 323
- ToS R ewrite 325
- Monitoring QoS 328
- Limiting Traffic Rate 329
- Per-Flow Rate Limiting 330
- Port Rate Limiting 330
- Aggregate Rate Limiting 331
- Example Configurations 332
- Chapter 22 335
- Performance 335
- Monitoring Guide 335
- Monitoring Broadcast Traffic 337
- Chapter 23 339
- Configuring and Enabling RMON 340
- RMON Groups 341
- Control Tables 343
- Using RMON 344
- Configuring RMON Groups 345
- Displaying RMON Information 348
- RMON CLI Filters 349
- Troubleshooting RMON 351
- Allocating Memory to RMON 353
- Chapter 24 355
- Chapter 25 359
- Configuring WAN Interfaces 360
- Forcing Bridged Encapsulation 362
- Packet Compression 362
- Packet Encryption 364
- WAN Quality of Service 364
- Frame Relay Overview 366
- Configuring PPP Interfaces 371
- Monitoring PPP WAN Ports 374
- PPP Port Configuration 374
- WAN Configuration Examples 376
- Router R1 Configuration File 378
- Router R2 Configuration File 378
- Router R3 Configuration File 379
- Router R4 Configuration File 379
- Router R5 Configuration File 380
- Router R6 Configuration File 380
- Appendix A 383
- New Features 383
- Supported on Line 383
- SSR 2000 Line Cards 387
- Network Address Translation 388
- Load Balancing (LSNAT) 390
- Layer 4 Bridging 391
- Per-Protocol VLAN 392
- QoS Rate Limiting 393
- ToS R ewr ite 394
- Established Bit ACL 394
- Multiple IPX Encapsulation 394
- Jumbo Frames 395
- Identifying a Line Card 396
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