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4-14 Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, Version v5.3.1
Chapter 4
Need for
Spanning tree
Protocol
For a bridging network to function properly, only one active path
can exist between two stations. Multiple active paths between
stations cause loops in the network. If a loop exists in the bridged
network topology, the potential exists for message duplication, and
in some cases a “Broadcast Storm”.
Spanning Tree Protocol defines a single spanning tree that spans all
switches in a bridged network. It forces certain redundant data paths
into a standby (blocked) state. If one network segment in the
Spanning Tree Protocol becomes unreachable, or if Spanning Tree
Protocol costs change, the spanning-tree algorithm reconfigures the
spanning-tree topology and reestablishes the bridge port by
activating the standby path.
Supported
Spanning Tree
Configurations
The Avaya Multiservice Switch supports four different Spanning
Tree configurations.
■ IEEE 802.1D
■ Dual-Layer
■ Per-VLAN (Default setting)
■ Disabled
IEEE 802.1D - If you use the 802.1D spanning tree option all
VLANs participate in the same spanning tree. The implication is that
after resolving the spanning tree topology, a port will be forwarding,
or blocked for all VLANs.
Dual-Layer - This option is to be used on a switch that is in
between a 802.1D spanning tree domain switch and a per-VLAN
domain switch. This option, allows the switch to terminate a legacy
spanning tree (802.1D) from old bridges that are VLAN incapable,
and interoperate with other per-VLAN spanning tree bridges.
Per-VLAN - If you use the Spanning Tree per VLAN option, each
VLAN runs a separate spanning tree with its own BPDUs. This
allows different ports to blocked or forwarding for different VLANs.
Disabled - Disables Spanning Tree for the entire switch.
- Avaya P550R 1
- Multiservice Switch 1
- User Guide 1
- Version 5.3.1 1
- Produced in USA, July, 2002 4
- Table of Contents 5
- IndexIndex 1 16
- Overview of the Contents 17
- Technical Support 19
- Conventions 20
- Related Documentation 22
- Online Help 23
- Document Files 25
- Documentation 26
- Terminology 26
- Documentation Feedback 27
- Introduction 29
- Hardware Components 30
- 1.76 Gb/s 32
- 22.88 Gb/s 32
- Chapter 1 34
- 50-Series Modules 35
- Layer 3 36
- Supervisor 36
- Redundant Supervisor 37
- Media Modules 38
- Layer 2 and 39
- Layer 3 Gigabit 39
- ATM Uplink 40
- 80-Series Modules 41
- Software Features 42
- Flood Pruning Using VLANs 43
- Hunt Groups 44
- OpenTrunk Technology 44
- Load MIB 45
- Spanning Tree Modes 45
- Port Settings 48
- Spanning Tree Design 48
- Extensive Fault Tolerance 49
- Buffer and Queue Management 49
- New Software Features 50
- Routing Overview 56
- Initialize and Setup 59
- Setting up an 60
- Establishing a 60
- Telnet Session 60
- Terminating a 61
- Telnet session 61
- Troubleshootin 61
- Connecting to 66
- 10/100Base-T 66
- Opening the Web Agent 67
- Moving through the Web Agent 69
- Creating a Custom Access Type 72
- Custom Access 73
- Types with the 73
- Deleting a Custom Access Type 74
- Setting Up User Accounts 75
- Disabling User Accounts 77
- Setting Up SNMP Communities 78
- Configuring User Accounts 81
- (RADIUS) Client Support 82
- Realms & 83
- Login Order of 85
- Operations 85
- RADIUS Client 85
- File settings 85
- Sample Client 86
- Configuring a 87
- Serial Console 90
- Port as a TTY 90
- Console Using 90
- Connecting a 93
- &D0 Disable DTR 96
- Regaining 98
- Configuration 98
- Access to the 98
- PPP Serial Port 98
- Using Dial-Up 100
- Networking 100
- Serial Port 100
- Overview 101
- Chapter 2 102
- Starting a Telnet Session 103
- Managing Configuration Files 104
- Copying Configuration Files 105
- Using the Web 106
- Copying Files 107
- Parameter Description Options 108
- Configuring System 113
- Information 113
- Chapter 3 114
- Web Agent 115
- Procedure 115
- Setting Summer Time Hours 116
- Configuration dialog box 119
- Parameter Definition 119
- Setting the System Clock 122
- Performing a Reset 128
- ProminetMib.txt 129
- Using VLANs, Spanning Tree 131
- What is a VLAN? 132
- Ingress Rules 134
- Forwarding Rules 135
- Binding a Port 136
- Egress Rules 137
- VLAN Considerations 137
- Creating a VLAN 138
- Configuring VLAN Parameters 141
- Assigning Ports to VLANs 143
- Chapter 4 144
- Problems with 145
- Single Spanning 145
- Tree Instance 145
- IEEE 802.1D 145
- Managing 146
- Spanning Tree 146
- Bridge Port The bridge port 151
- (Figure 4-13) 152
- Parameter Explanation 152
- Hunt Group 158
- Hunt Group Terminology 159
- How Hunt Groups Load Share 160
- 50 Series 161
- Forwarding 161
- Engines and 161
- Fabric Ports 161
- Load Share 162
- Function 162
- Optimizing 164
- Throughput 164
- Creating Hunt Groups 166
- Adding Switch 169
- Ports to the 169
- Creating Hunt 171
- Groups Using 171
- Viewing Hunt Group Members 172
- Snooping 174
- Configuring Port 181
- Parameters 181
- Physical Port Features 182
- Configuring Port Parameters 183
- Switch Port Features 185
- Chapter 5 186
- Automatic VLAN Creation 210
- Configuring Fast Start Mode 213
- GBIC Identification 218
- Enabling NEDR 222
- Enabling IEDR 225
- Enabling IEDR for Hunt Groups 225
- Viewing IEDR Settings 226
- Error Messages 227
- System Messages 227
- Managing the Address 231
- Forwarding Table 231
- Table Sizes 232
- Chapter 234
- AFT Default Settings 237
- Increment and Threshold 237
- Trigger 238
- (Multiplier) 238
- Threshold 238
- Age Timers 239
- Instance Table Information 240
- ■ APPLY to save your changes 244
- Searching the Switch AFT 245
- Parameter Defines the 250
- Adding Entries 252
- Manually Using 252
- Option 82 for DHCP 253
- Source Addresses 254
- Configuring Redundancy 259
- Contents 261
- Installing Redundant Hardware 264
- Enabling Redundant Hardware 264
- ■ An event log message 267
- Replacing an Element 268
- Ethernet Console IP Addresses 269
- Synchronizing Process 272
- Configuring DNS Client 277
- Using the Web Agent 282
- Using the CLI 284
- CLI Example 284
- Configuring IP Routing 287
- Display Existing 290
- IP interfaces 290
- Parameter Allows you to 293
- Enabling IP 297
- Routing Using 297
- Creating a 301
- Multinet 301
- Interface 301
- Access Control List Overview 303
- Conventions for 304
- Network Configuration 306
- Creating Access Lists 307
- Creating 310
- Extended 310
- Access Rules 310
- Activating Access Lists 314
- Important 318
- Terms used in 318
- Recognize 320
- Performance 320
- Evaluate System Performance 321
- Enable Routing at the Module 323
- Design Safe, Efficient ACLs 323
- Identify the Ports 325
- Configuring Hash Mode 327
- Managing F-chip Memory 327
- Creating IP Static Routes 329
- Creating IP 330
- Static Routes 330
- Static ARP 331
- Entries Using 331
- IP Multicast 336
- Configuring IGMP 337
- Globally 338
- Enabling IGMP 338
- Modifying IGMP 341
- Interfaces Using 341
- Routing Protocol (DVMRP) 343
- Modifying a DVMRP Interface 345
- Statistics 347
- Displaying 348
- Global IP 348
- Routing 348
- Statistics Using 348
- Statistic Defines the 349
- Displaying the 356
- IP Routing Table 356
- IP Multicast Statistics 358
- Displaying IGMP 359
- Global Statistics 359
- Display the 364
- Multicast group 364
- DVMRP Global 365
- Statistics by 365
- Statistics using 369
- Neighbor 370
- DVMRP Routing 372
- Table, using the 372
- Globally Enabling VRRP 379
- Enabling VRRP on an Interface 380
- Displaying VRRP Statistics 386
- Non-Address 390
- Owner Features 390
- Assigning 390
- Priorities to 390
- Virtual Routers 390
- Enabling IRDP on an Interface 392
- Protocol (LDAP) 395
- Viewing LDAP Statistics 399
- Console} 404
- Configuring the Routing 405
- Information Protocol (RIP) 405
- Configuring RIP 406
- Modifying RIP Interfaces 408
- V1 is the default setting 409
- Trusted RIP 412
- Neighbors 412
- Key Chains on 413
- Multiservice 413
- Configuring the 414
- Key Chain using 414
- Viewing RIP Statistics 416
- Viewing RIP 417
- NBMA IP Interfaces 418
- Configuring the OSPF 419
- Routing Protocol 419
- Configuring 421
- OSPF Globally 421
- Creating OSPF Areas 423
- Deleting OSPF Areas 425
- Modifying OSPF Areas 426
- Modifying OSPF Interfaces 427
- OSPF Passive-Interface 431
- Creating OSPF Virtual Links 432
- Deleting OSPF Virtual Links 434
- Modifying OSPF Virtual Links 435
- Creating OSPF Summaries 436
- Deleting OSPF Summaries 438
- Modifying OSPF Summaries 438
- Parameter Displays the 440
- Displaying OSPF Links 442
- Displaying OSPF Neighbors 443
- Searching the 445
- OSPF Link State 445
- Database Using 445
- Parameter Displays 448
- Using Web 452
- Setting Up NBMA Neighbors 453
- Removing NBMA Neighbors 454
- CLI Commands 455
- Configuring IPX Routing 457
- IPX Datagram Structure 458
- Hardware Requirements 459
- Configuring IPX Interfaces 461
- Creating IPX Static Routes 465
- Deleting IPX Static Routes 468
- Modifying IPX Static Routes 469
- Creating IPX Static Services 469
- Deleting IPX Static Service 472
- Modifying IPX Static Service 473
- Searching the IPX Route Table 476
- Configuring IPX RIP 483
- Protocol 483
- Configuring IPX RIP Protocol 485
- Creating and 489
- Modifying IPX 489
- RIP Filters Using 489
- Interpreting IPX 491
- RIP Interface 491
- Configuring IPX SAP 493
- Creating IPX SAP Filters 495
- Creating IPX SAP Name Filters 496
- Creating IPX 499
- SAP Name 499
- Filters Using the 499
- SAP Network 500
- Default value is outbound 502
- Configuring IPX SAP Protocol 503
- SAP Interface 505
- Configuring AppleTalk 507
- Configuring AppleTalk Routing 509
- Editing AppleTalk Interfaces 514
- Viewing AppleTalk Statistics 530
- Parameter Number of 531
- Managing Intelligent 543
- Multicasting 543
- Dissemination 546
- Process, LGMP 546
- Displaying Router Ports 550
- Creating Static Client Ports 560
- Deleting Static Client Ports 561
- (IGMP) Snooping 562
- Enabling IGMP Snooping 564
- Protocol (LGMP) Server 565
- Configuring the LGMP Server 568
- 4. Click: 571
- Protocol (LGMP) Client 572
- Enabling the LGMP Client 574
- (CGMP) Snooping 578
- — APPLY to save your changes 579
- Viewing CGMP Snooping 580
- Monitoring the Avaya 581
- Checking Active Alarms 585
- Using the Event Subsystem 586
- Viewing Event Statistics 595
- Setting Log Size 596
- Monitoring and Configuring 601
- Parameters continued 608
- Parameter Defines 611
- By Using RMON and Ethernet 613
- Statistic Indicates Actions 616
- Setting Up Port Mirroring 620
- Setting Up Port 633
- Mirroring 633
- Removing Port 634
- Unknown Source Addresses 635
- SNMP MIB 637
- MIB MIB Object OID 638
- Managing Buffers and 639
- Queues on 50-Series Modules 639
- Managing Buffers and Queues 640
- Parameter Definition 643
- Buffers and 645
- Queues Using 645
- 80-Series QoS 647
- Why implement QoS? 648
- How Does QoS Work? 649
- Diagram of QoS Process 652
- Classification of Traffic 653
- Using a Default 655
- ACL Rule 655
- Diffserv 656
- Precedence of Priorities 657
- Supported Number of Queues 658
- Examples 660
- <mod-num> 665
- Displaying the DiffServ Table 668
- Setting Up an ACL Rule 669
- Keywords 670
- Arguments, and 670
- arguments are 1 671
- Keyword, Argument 671
- Definition 671
- 10.10.60.0 0.0.0.255 673
- 10.10.80.0 0.0.0.255 673
- 199.93.239.168 673
- Examples: 674
- Extended ACL 674
- To . . . Enter . . 675
- Setting Up a Default ACL Rule 676
- Ingress Policing 677
- Setting Up Policing 678
- Queue-Servicing Algorithms 681
- Strict Priority Queueing 682
- Management Traffic 684
- Setting Up WFQ 685
- Setting Up CBQ 687
- Setting Up CBWFQ 688
- QoS Statistics 693
- Statistic Explanation 694
- Egress Port 695
- Statistics for 10/ 695
- 100 Modules 695
- Statistics for 696
- Gigabit 696
- Buffer Statistics 697
- Displaying QoS Statistics 699
- Resetting the QoS Statistics 700
- Upgrading the Application 703
- Software 703
- Appendix A 706
- Setting the Startup Image 708
- Supervisor Modules 709
- Verifying the Upgrade 712
- Upgrading from v4.x to v5.x 712
- Boot Mode 715
- Password Recovery 716
- Appendix B 718
- Supported MIB Groups 719
- Appendix C 720
- IP Interface 721
- IP Version 4.0 and Services 721
- IP Forwarding/Route Table 722
- AppleTalk 722
- FCC Notice 723
- Avertissement! 724
- Numerics 725
- Index 11 735
- Index 13 737
- Index 15 739
- Index 17 741
- Index 19 743
- Index 21 745
- Index 23 747
- Index 25 749
- Index 27 751
- Index 29 753
- Index 31 755
- Index 33 757
- Index 35 759
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