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Nortel Networks 450 Spanning Tree Considerations for MultiLink Trunks

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Using the BayStack 450 10/100/1000 Series Switch

1-72 302401-D Rev 00

Spanning Tree Considerations for MultiLink Trunks

The spanning tree Path Cost parameter is recalculated based on the aggregate

bandwidth of the trunk. For example, Figure 1-47 shows a four-port trunk (T1)

with two port members operating at 100 Mb/s and two at 10 Mb/s. Trunk T1

provides an aggregate bandwidth of 220 Mb/s. The Path Cost for T1 is 4 (Path

Cost = 1000/LAN speed, in Mb/s). Another three-port trunk (T2) is configured

with an aggregate bandwidth of 210 Mb/s, with a comparable Path Cost of 4.

When the Path Cost calculations for both trunks are equal, the software chooses

the trunk with the lar ge r aggreg ate ban dwidth (T1 ) to determin e the most effic ient

path.

Figure 1-47. Path Cost Arbitration Example

BS45029A

T1 T2

100 Mb/s

100 Mb/s

10 Mb/s

100 Mb/s

100 Mb/s

10 Mb/s

10 Mb/s

Path Cost T1 = 4

S1

S2

Path Cost T2 = 4

Aggregate Bandwidth

220 Mb/s Aggregate Bandwidth

210 Mb/s

kombk.book Page 72 Tuesday, June 29, 1999 3:25 PM

Contents

Main ii Copyright 1999 Nortel Networks Trademarks Statement of Conditions USA Requirements Only European Requirements Only Japan/Nippon Requirements Only Taiwan Requirements Canada Requirements Only iv Nortel Networks NA Inc. Software License Agreement Page Page Contents Page Page Page Page Page Page Page Figures Page Page Page Tables Page Preface Audience Organization Text Conventions Acronyms Related Publications How to Get Help Page Chapter 1 BayStack 450 10/100/1000 Series Switches Physical Description 1-2 Front Panel Figure 1-2. BayStack 450 Switch Front Panels 10BASE-T/100BASE-TX Ports 100BASE-FX MT-RJ Ports 302401-D Rev 00 1-5 kombk.book Page 5 Tuesday, June 29, 1999 3:25 PM = Dual color LED 450-12T Switch Figure 1-3. BayStack 450-24T/12T LED Display Panel 450-24T Switch BayStack 450-24T BayStack 450-12T 450-12F Switch downstream temporary base unit no multiple Back Panel Figure 1-5. BayStack 450 Switch Back Panel Table 1-2. International Power Cord Specifications Page Features Page Page IEEE 802.1p Prioritizing IEEE 802.1Q VLANs IGMP Snooping Feature Flash Memory Storage MultiLink Trunking Port Mirroring Autosensing and Autonegotiation BootP Automatic IP Configuration/MAC Address SNMP MIB Support Configuration and Switch Management Network Configuration Desktop Switch Application 1-20 Segment Switch Application Figure 1-7. BayStack 450 Switch Used as a Segment Switch High-Density Switched Workgroup Application Fail-Safe Stack Application Stack Operation BayStack 400-ST1 Cascade Module Page Base Unit Page Stack Configurations Page Page Redundant Cascade Stacking Feature Page IEEE 802. 1Q VLAN Workgroups IEEE 802.1Q Tagging Page 302401-D Rev 00 1-35 Figure 1-17. 802.1Q Tagging (1 of 4) Figure 1-18. 802.1Q Tagging (2 of 4) 1-36 Figure 1-19. 802.1Q Tagging (3 of 4) Figure 1-20. 802.1Q Tagging (4 of 4) VLANs Spanning Multiple Switches Page Page Shared Servers Page Page Page Page VLAN Workgroup Summary 1-46 Figure 1-30. VLAN Configuration Spanning Multiple Switches VLAN Configuration Rules IGMP Snooping Page Page Page IGMP Snooping Configuration Rules 302401-D Rev 00 1-53 IEEE 80 2.1p Prio rit i zi ng Figure 1-34. Prioritizing Packets Page Page Page MultiLink Trunks Client/Server Configuration Using MultiLink Trunks Page Trunk Configuration Screen Examples Page Page Page Page Page Page Page Page Before Configuring Trunks MultiLink Trunking Configuration Rules Page How the MultiLink Trunk Reacts to Losing Distributed Trunk Members Spanning Tree Considerations for MultiLink Trunks Page Page Additional Tips About the MultiLink Trunking Feature Port Mirroring (Conversation Steering) Port-Based Mirroring Configuration Page Address-Based Mirroring Configuration Page Page Port Mirroring Configuration Rules Chapter 2 Installing the BayStack 450 Switch Installat ion Re quir eme nt s Page Installati o n Procedure Installing the BayStack 450 Switch on a Flat Surface Installing the BayStack 450 Switch in a Rack Page Page Attaching Devices to the BayStack 450 Switch Page Page Page Page Connecting Power Page 2-14 Verifying the Installation Verifying the Installation Using the LEDs Figure 2-10. Observing LEDs to Verify Proper Operation Table 2-1. Power-Up Sequence Verifying the Installation Using the Self-Test Screen Page Initial Setup Standalone Switch Setup Page Page Stack Setup Installi ng the BayS tac k 450 Swit ch Figure 2-15. Main Menu (Standalone Switch Example) Figure 2-16. Main Menu (Stack Configuration Example) Page Page Page Chapter 3 Using the Console Interface Accessing the CI Menus an d Screen s Usin g the CI Menus an d Screen s Navigating the CI Menus and Screens 302401-D Rev 00 3-3 Screen Fields and Descriptions Figure 3-1. Map of Console Interface Screens Note: The field values shown in the CI sc reens in this section are provided as examples only. Main Menu Table 3-1 describes the CI main menu options. temporarily Table 3-1. Console Interface Main Menu options 3-6 Table 3-1. Console Interface Main Menu options Caution: IP Configuration/Setup Table 3-2. IP Configuration/Setup Screen Fields stack in-use Note: Choosing a BootP Request Mode BootP When Needed BootP Always BootP Disabled BootP or Last Address SNMP Configuration Figure 3-4. SNMP Configuration Screen Table 3-3 describes the SNMP Configuration screen fields. Table 3-3. SNMP Configuration Screen Fields 3-14 Link D own Link Up Table 3-3. SNMP Configuration Screen Fields (continued) System Charac teristics xx Figure 3-5. System Characteristics Screen Table 3-4 describes the System Characteristics screen fields. x.x.x 3-16 Table 3-4. System Characteristics Screen Fields Table 3-4. System Characteristics Screen Fields Switch Configur ation Table 3-5. Switch Configuration Menu Screen Options MAC Address Table Table 3-6 describes the MAC Address Table screen fields. VLAN Configuration Menu Figure 3-8. VLAN Configuration Menu Screen Table 3-7 describes the VLAN Configuration Menu screen options. Table 3-7. VLAN Configuration Menu Screen Options Page Table 3-8 describes the VLAN Configuration screen fields. Tagged Trunk Untagged Acc ess Page Figure 3-10. VLAN Port Configuration Screen Table 3-9 describes the VLAN Port Configuration screen fields. Table 3-9. VLAN Port Configuration Screen Fields 3-28 will no t Table 3-9. VLAN Port Configuration Screen Fields (continued) Page Page Figure 3-12. Traffic Class Configuration Screen Table 3-11 describes the Traffic Class Configuration screen fields. Table 3-11. Traffic Class Configuration Screen Fields Port Configuration Table 3-12 describes the Port Configuration screen fields. Figure 3-14. Port Configuration Screen (2 of 2) Note: When a gigabit MDA is installed, only the Status field for that MDA Table 3-12. Por t Configuration Screen Fields 3-34 High Speed Flow Control Configuration Note: This screen only appears when an optional gigabit MDA is installed in the Uplink Module slot. Table 3-12. Port Configuration Screen Fields (continued) Table 3-13 describes the High Speed Flow Control Configuration screen fields. Choosing a High Speed Flow Control Mode MultiLink Trunk Configuration 3-38 Figure 3-16. MultiLink Trunk Configuration Menu Screen Table 3-14 describes the MultiLink Trunk Configuration Menu screen options. Table 3-14. MultiLink Trunk Configuration Menu Screen Options Page 3-40 Figure 3-17. MultiLink Trunk Configuration Screen Table 3-15 describes the MultiLink Trunk Configuration screen fields. Table 3-15. MultiLink Trunk Configuration Screen Fields Page 3-42 Figure 3-18. MultiLink Trunk Utilization Screen (1 of 2) Figure 3-19. MultiLink Trunk Utilization Screen (2 of 2) Table 3-16 describes the MultiLink Trunk Utilization screen fields. Table 3-16. MultiLink Trunk Utilization Screen Fields Page Port Mirroring Configuration 3-46 Table 3-17 describes the Port Mirroring Configuration screen fields. port-based modes Table 3-17. Port Mirroring Configuration Screen Fields address-based modes Table 3-18. Monitoring Modes Table 3-17. Port Mirroring Configuration Screen Fields Rate Limiting Configuration Figure 3-22. Rate Limiting Configuration Screen (2 of 2) 3-50 Table 3-19 describes the Rate Limiting Configuration screen fields. Table 3-19. Rate Limiting Configuration Screen Fields IGMP Configuration 3-52 Table 3-20 describes the IGMP Configuration screen fields. existing Table 3-20. IGMP Configuration Screen Fields Query Interval Table 3-20. IGMP Configuration Screen Fields (continued) 3-54 Port Statistics Figure 3-24. Port Statistics Screen Table 3-21 describes the Port Statistics screen fields. Note: In a stack ed co nfi guration , the Port S tatisti cs s creen a ppears in a s lightly different format when the port selected in the Unit/Port field is configured with a gigabit MDA. Table 3-21. Port Statistics Screen Fields 3-56 Table 3-21. Port Statistics Screen Fields Page Console/Comm Po rt Configuration Cau tion: 3-60 any participating switch in a stack configuration (continued) Cau tion: 3-62 any participating switch in a stack configuration (continued) any participating s witch in a stack configuration Cau tion: (continu ed) Page Renumber Stack Units 3-66 Table 3-23 describes the Renumber Stack Units screen options: Table 3-23. Renumber Stack Units Screen Options Hardware Unit Informatio n Spanning Tree Conf iguration Table 3-24 describes the Spanning Tree Configuration Menu screen options: Spanning Tree Port Configuration 3-70 Figure 3-30. Spanning Tree Port Configuration Screen (2 of 2) Stack Switch Table 3-25 describes the Spanning Tree Port Configuration screen fields. Table 3-25. Spanning Tree Port Configuration Screen Fields Table 3-25. Spanning Tree Port Configuration Screen Fields Display Spanning Tree Switch Settings Table 3-26 describes the Spanning Tree Switch Settings parameters. Table 3-26. Spanning Tree Switch Settings Parameters 3-74 Table 3-26. Spanning Tree Switch Settings Parameters TELNET Configuration 3-76 Table 3-27. TELNET Configuration Screen Fields Failures: Accesses None: Table 3-27. TELNET Configuration Screen Fields Software Do wnload before agent image Figure 3-33. Software Download Screen Table 3-28 describes the Software Download screen fields. Table 3-28. Software Download Screen Fields Note: boot code image Page Note: The LED indications described in Table 3-29 apply to a 24-port switch Table 3-29. LED Indications During the Software Do wnload Process Configuration File Requirements Table 3-30. Configuration File Download/Upload Screen Fields Page Display Event Log Excessive Bad Entries Write Threshold Flash Update Reset Page Reset to Default Settings Page Page Logout Page Chapter 4 Troubleshooting 4-2 kombk.book Page 2 Tuesday, June 29, 1999 3:25 PM Interpreting the LEDs = Dual color LED BS45003A 450-12T Switch Figure 4-1. BayStack 450-24T/12T LED Display Panel 450-12F Switch 4-4 Table 4-1. BayStack 450 Switch LED Descriptions downstream tempor ary base unit no Diagnosing and Correcting the Problem Normal Power-Up Sequence Troubleshooting Port Connection Problems Table 4-2. Corrective Actions Note: Page Page Page Appendix A Technical Specificati ons Electrical Environmental A-2 Physical Dimensions Performanc e Speci fications Data Rate Network Protocol and Standards Compatibility Technical Specifications Interface Options Safety Agency Certification Electromagnetic Emissions Electromagnetic Immunity Declaration of Conformity Appendix B Gigabit Fiber Optical Characteristics 1000BASE-SX Models Operating Range B-2 Transmit Characteristics Table B-2 lists the transmit characteristics for the 1000BASE-SX models: Table B-2. 1000BASE-SX Transmi t Charac teris ti cs Gigabit Fiber Optical Characteristics Receive Characteristics Table B-3 lists the receive characteristics for the 1000BASE-SX models: Worst-Case Power Budget and Penalties Table B-4 lists the worst-case power budget and penalties for the 1000BASE-SX models: Table B-3. 1000BASE-SX Receive Characteristics 1000BASE-LX Models Table B-5 lists the operating range for the 1000BASE-LX models: Operating Range Table B-4. Worst-Case 1000BASE-SX Power Budget and Penalties Gigabit Fiber Optical Characteristics Transmit Characteristics Table B-6 lists the transmit characteristics for the 1000BASE-LX models: Table B-7 lists the receive characteristics for the 1000BASE-LX models: Receive Characteristics Table B-6. 1000BASE-LX Transmit Characteristics Worst-Case Power Budget and Penalties Table B-8 lists the worst-case power budget and penalties for the 1000BASE-LX models: Note: The link power penalties (Table B-8) are used for link power budget calculations only. They are not requirements and are not meant to be tested. Table B-8. Worst-Case 1000BASE-LX Power Budget and Penalties Appendix C Media Dependent Adapters C-2 10BASE-T/100BASE-TX MDA Figure C-1. 400-4TX MDA Front Panel Table C-1. 400-4TX MDA Components 100BASE-FX MDAs Page For installa tion i nstru ctions, see Installing an MDA on page C-11. 1000BASE-S X MDAs Page C-8 Table C-3. 1000BASE-SX MDA Components M1000BASE-LX MDAs Page Installing an MDA Replac ing an MDA with a Di fferent Model 1000BASE-LX Multimode A pplications Page Appendix D Quick Steps to Features D-2 Configuring 802.1Q VLANs Figure D-1. Configuring 802.1Q VLANs (1 of 2) 302401-D Rev 00 D-3 Figure D-2. Configuring 802.1Q VLANs (2 of 2) D-4 Configuring MultiLink Trunks Figure D-3. Configuring MultiLink Trunks 302401-D Rev 00 D-5 Configuring Port Mirroring Figure D-4. Configuring Port Mirroring (1 of 2) D-6 Figure D-5. Configuring Port Mirroring (2 of 2) 302401-D Rev 00 D-7 Configuring IGMP Snooping Figure D-6. Configuring IGMP Snooping (1 of 3) D-8 Figure D-7. Configuring IGMP Snooping (2 of 3) 302401-D Rev 00 D-9 Figure D-8. Configuring IGMP Snooping (3 of 3) Page Appendix E Connectors and Pin Assignments RJ-45 (10BASE-T/1 00BASE-TX) Port Connectors MDI and MDI-X Devices Connector s and Pin Assig nme nts 302401-D Rev 00 E-3 MDI-X to MDI Cable Connections Figure E-2. MDI-X to MDI Cable Connections E-4 MDI-X to MDI-X Cable Connections Figure E-3. MDI-X to MDI-X Cable Connections DB-9 (RS-232-D) Console/Comm Port Connector Page Appendix F Default Settings Table F-1 lists the factory default settings for the BayStack 450 switch. F-2 VLAN number (continued) Default Settings F-4 Default Settings Page Appendix G Sample BootP Configuration File G-2 Index A B C Index-2 D E F G H L M N O Index-4 P R S T Index-6 U V