Autosensing and Autonegotiation | Nortel Networks 24T instruction

Using the BayStack 410-24T 10BASE-T Switch

Autosensing and Autonegotiation

BayStack 410-24T switches are autosensing and autonegotiating devices. The term autosense refers to a port’s ability to sense the speed of an attached device. The term autonegotiation refers to a standardized protocol (IEEE 802.3u) that exists between two IEEE 802.3u-capable devices.

Because the BayStack 410-24T switch uses fixed 10BASE-T ports, the autonegotiation feature does not negotiate the port speed when connecting to another IEEE 802.3u-capable device. The BayStack 410-24T switch only negotiates the best duplex mode.

When an optional 10/100 BASE-T MDA is installed, the autonegotiation feature selects the best of both speed and duplex modes for that connection. The MDA ports negotiate down from 100 Mb/s speed and full-duplex mode until a supported speed and duplex mode is acknowledged by the attached device.

Autosensing is used when the attached device is not capable of autonegotiation or is using a form of autonegotiation that is not compatible with the IEEE 802.3u autonegotiation standard. In this case, because it is not possible to sense the duplex mode of the attached device, the BayStack 410-24T switch reverts to half-duplex mode.

For more information about autosensing and autonegotiation modes, see “Autonegotiation Modes” on page 4-7.

MultiLink Trunking

The MultiLink Trunking feature allows you to group multiple ports (up to four) together when forming a link to another switch or server, thus increasing aggregate throughput of the interconnection between two devices (up to 800 Mb/s in full-duplexmode when an optional 100BASE-T MDA is installed). BayStack 410-24T switches can be configured with up to six MultiLink Trunks. The trunk members can be configured within a single unit in the stack or distributed between any of the units within the stack configuration (distributed trunking).

For more information about the MultiLink Trunking feature, see “MultiLink Trunks” on page 1-61.

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Nortel Networks 24T manual Autosensing and Autonegotiation, MultiLink Trunking

Contents

Using the BayStack 410-24T 10BASE-T Switch Statement of Conditions Copyright 2000 Nortel NetworksTrademarks USA Requirements Only Canada Requirements Only Japan/Nippon Requirements OnlyTaiwan Requirements EC Declaration of Conformity Nortel Networks NA Inc. Software License Agreement Rev Page Contents Switch Software Image Configuration Parameters Chapter Installing the BayStack 410-24T Switch Chapter Using the Console Interface 102 Chapter Troubleshooting Appendix D Connectors and Pin Assignments Page Figures Xvi IP Configuration/Setup Screen Standalone Switch Figure B-1 Figure C-8. Configuring Igmp Snooping 2 Page Tables 100 Preface This guide has four chapters, six appendixes, and an index Before You BeginOrganization If you want to Go to Text Conventions Acronyms Related Publications How to Get Help Technical Solutions Center Telephone Number BayStack 410-24T Switch Description Front Panel Comm Port 10BASE-T Port Connectors Uplink/Expansion Slot Provides descriptions of the LEDs BayStack 410-24T Switch LED DescriptionsLED Display Panel Label Type Color State Meaning CAS Up Stack mode Off Switch is in standalone mode Green BayStack 410-24T Switch Back Panel Back Panel International Power Cord Specifications AC Power ReceptacleCountry/Plug description Specifications Typical plug Cascade Module Slot Rpsu ConnectorCooling Fans Features Telnet Introduction to the BayStack 410-24T Switch Virtual Local Area Networks VLANs BayStack 410-24T Switch Security Feature Security See MAC Address-Based Security on RADIUS-Based Network Security MAC Address-Based Security Configuration and Switch Management Igmp Snooping FeatureIeee 802.1p Configuration Parameters Switch Software ImageFlash Memory Storage Autosensing and Autonegotiation MultiLink Trunking Ieee 802.1Q VLANs Port Mirroring BootP Automatic IP Configuration/MAC Address Stack software offset is Then the Stack MAC address becomes Snmp Trap Support Trap Name Configurable Sent whenSnmp MIB Support Supported Snmp Traps Network Configuration Desktop Switch Application BayStack 410-24T Switch Used as a Desktop Switch Segment Switch Application BayStack 410-24T Switch Used as a workgroup Switch High-Density Switched Workgroup Application Configuring Power Workgroups and a Shared Media Hub Fail-Safe Stack Application Fail-Safe Stack Example Stack Operation BayStack 400-ST1 Cascade Module Unit Select Switch Cascade a Out ConnectorCascade a In Connector Initial Installation Base Unit Stack MAC Address Temporary Base Unit Stack Configurations Removing a Unit from the Stack Stack Up Configurations Stack Down Configurations 13. Stack Down Configuration Example Redundant Cascade Stacking Feature 14. Redundant Cascade Stacking Feature Ieee 802.1Q Vlan Workgroups 15. Port-Based Vlan Example Ieee 802.1Q Tagging 16. Default Vlan Settings 17. Port-Based Vlan Assignment 19 .1Q Tag Assignment VLANs Spanning Multiple Switches VLANs Spanning Multiple 802.1Q Tagged Switches VLANs Spanning Multiple Untagged Switches 22. VLANs Spanning Multiple Untagged Switches 23. Possible Problems with VLANs and Spanning Tree Protocol Shared Servers 24. Multiple VLANs Sharing Resources 25. Vlan Broadcast Domains Within the Switch To configure the Vlan port membership for Vlan Default Vlan Configuration screen opens Figure To configure the Pvid port Vlan identifier for Port 27. Vlan Configuration Screen Example 28. Default Vlan Port Configuration Screen Example 29. Vlan Port Configuration Screen Example Vlan Workgroup Summary 30. Vlan Configuration Spanning Multiple Switches Vlan Configuration Rules Igmp Snooping 31. IP Multicast Propagation With Igmp Routing 32. BayStack 410-24T Switch Filtering IP Multicast Streams 1 33. BayStack 410-24T Switch Filtering IP Multicast Streams 2 Igmp Snooping Configuration Rules Ieee 802.1p Prioritizing 34. Prioritizing Packets 35. Port Transmit Queue To configure the port priority level, follow these steps Traffic Class Configuration screen opens Figure Vlan Port Configuration screen opens Figure 37. Setting Port Priority Example 38. Switch-to-Switch Trunk Configuration Example MultiLink Trunks Client/Server Configuration Using MultiLink Trunks 39. Switch-to-Server Trunk Configuration Example 40. Client/Server Configuration Example Trunk Configuration Screen for Switch S1 Trunk Configuration Screen ExamplesSetting up the Trunk Configuration for S1 MultiLink Trunk Configuration screen opens Figure 42. MultiLink Trunk Configuration Screen for Switch S1 Using the BayStack 410-24T 10BASE-T Switch Trunk Configuration Screen for Switch S2 43. MultiLink Trunk Configuration Screen for Switch S2 Using the BayStack 410-24T 10BASE-T Switch Trunk Configuration Screen for Switch S3 44. MultiLink Trunk Configuration Screen for Switch S3 Using the BayStack 410-24T 10BASE-T Switch Trunk Configuration Screen for Switch S4 45. MultiLink Trunk Configuration Screen for Switch S4 Using the BayStack 410-24T 10BASE-T Switch Before Configuring Trunks MultiLink Trunking Configuration Rules Using the BayStack 410-24T 10BASE-T Switch 46. Loss of Distributed Trunk Members Spanning Tree Considerations for MultiLink Trunks 47. Path Cost Arbitration Example 48. Example 1 Correctly Configured Trunk 49. Example 2 Detecting a Misconfigured Port Additional Tips About the MultiLink Trunking Feature Port Mirroring Conversation Steering Port-Based Mirroring Configuration 50. Port-Based Mirroring Configuration Example Using the BayStack 410-24T 10BASE-T Switch Address-Based Mirroring Configuration 51. Port Mirroring Port-Based Screen Example 52. Address-Based Mirroring Configuration Example 53. Port Mirroring Address-Based Screen Example Port Mirroring Configuration Rules Installing the BayStack 410-24T Switch Installation Requirements Package Contents Installation Procedure Installing the BayStack 410-24T Switch on a Flat Surface Installing the BayStack 410-24T Switch in a Rack Positioning the Chassis in the Rack Attaching Mounting Brackets Attaching Devices to the BayStack 410-24T Switch Connecting 10BASE-T Ports and 10/100 MDA Ports BASE-T Port Connections Connecting Fiber Optic MDA Ports Fiber Optic Port Connections Console/Comm Port Connecting a Terminal to the Console/Comm Port To connect a terminal to the Console/Comm port Connecting Power BayStack 410-24T Switch AC Power Receptacle Grounded AC Power Outlet Power-Up Sequence Verifying the InstallationVerifying the Installation Using the LEDs Stage Description LED indication Verifying the Installation Using the Self-Test Screen Configuration includes an additional test Cascade Sram test 12. Nortel Networks Logo Screen Initial Setup Standalone Switch Setup 13. Main Menu 14. IP Configuration/Setup Screen Standalone Switch Stack Setup 15. Main Menu Standalone Switch Example 17. IP Configuration/Setup Screen Stack Configuration Installing the BayStack 410-24T Switch Page Chapter Using the Console Interface Accessing the CI Menus and Screens Using the CI Menus and Screens Navigating the CI Menus and Screens Screen Fields and Descriptions Map of Console Interface Screens Main Menu Console Interface Main Menu Describes the CI main menu options Console Interface Main Menu options Reset to Default Configuration FileReset Settings OptionDescription Logout IP Configuration/Setup Describes the IP Configuration/Setup screen fields IP Configuration/Setup Screen Fields FieldDescription Choosing a BootP Request ModeIP Address to Ping Start Ping BootP Disabled BootP or Last Address BootP When Needed BootP Always Snmp Configuration Screen Fields Snmp ConfigurationDescribes the Snmp Configuration screen fields Field Description Read-Only Snmp Configuration Screen Fields System Characteristics Describes the System Characteristics screen fields System Characteristics Screen Fields System Characteristics Screen Fields Switch Configuration Describes the Switch Configuration Menu screen options Switch Configuration Menu Screen Options Display Port Statistics Option Description Igmp ConfigurationMAC Address Table Clear All Port Statistics MAC Address Table Screen Fields Describes the MAC Address Table screen fieldsField Description Aging Time Field Description Find an Address MAC Address Security Configuration Menu MAC Address Security Configuration MAC Address Security Configuration Menu Options MAC Address Security Configuration Screen SNMP-Locked MAC Address Security Configuration Screen FieldsField Description MAC Address Security Partition Time MAC Address Security Configuration Screen Fields MAC Address Security Port Configuration 10. MAC Address Security Port Configuration Screen 1 11. MAC Address Security Port Configuration Screen 2 Port MAC Address Security Port Configuration Screen FieldsField Description Unit Trunk MAC Address Security Port Lists 12. MAC Address Security Port Lists Screens 5 Screens Field Description Entry MAC Address Security Port Lists Screen FieldsPort List Port List Syntax Removing a Port from an Existing Port Number List Adding a New Port to an Existing Port Number ListCopying an Existing Field into an Adjacent Field MAC Address Security Table 14. MAC Address Security Table Screens 16 Screens 15. MAC Address Security Table Screen MAC Address Security Table Screen Fields Allowed Source Vlan Configuration Menu 12 describes the Vlan Configuration Menu screen options 12. Vlan Configuration Menu Screen Options Vlan Configuration Vlan Configuration Screen Fields 13 describes the Vlan Configuration screen fieldsField Description Create Vlan Vlan Configuration Screen Fields Vlan State 13. Vlan Configuration Screen FieldsField Description User-defined PID Port Membership Predefined Protocol Identifier PID PID Name Encapsulation PID Value hex Vlan Type Reserved PIDs PID Value hex Comments Gigabit Ports and BayStack 410-24T Switch Ports Restriction Vlan Port Configuration Vlan Port Configuration Screen Fields 16 describes the Vlan Port Configuration screen fieldsFilter Tagged Frames 16. Vlan Port Configuration Screen Fields Vlan Display by Port 19. Vlan Display by Port Screen Vlan Display by Port Screen Fields Traffic Class Configuration17 describes the Vlan Display by Port screen fields VLANs Traffic Class Configuration Screen Fields 18 describes the Traffic Class Configuration screen fieldsField Description User Priority Port Configuration Port Configuration Screen 1 19 describes the Port Configuration screen fields Port Configuration Screen Fields Autonegotiation High Speed Flow Control ConfigurationLnkTrap Speed/Duplex1 23. High Speed Flow Control Configuration Screen 20. High Speed Flow Control Configuration Screen Fields Choosing a High Speed Flow Control Mode High Speed Flow Control Configuration Screen Fields MultiLink Trunk Configuration Asymmetric Option Description MultiLink Trunk 21. MultiLink Trunk Configuration Menu Screen OptionsUtilization MultiLink Trunk Configuration Screen MultiLink Trunk Configuration Screen Fields Field Description Trunk MultiLink Trunk Configuration Screen Fields MultiLink Trunk Utilization Screen 26. MultiLink Trunk Utilization Screen 1 Traffic Type 23 describes the MultiLink Trunk Utilization screen fieldsMultiLink Trunk Utilization Screen Fields Unit/Port Field Description Last 5 Minutes Port Mirroring Configuration23. MultiLink Trunk Utilization Screen Fields Last 30 Minutes 24 describes the Port Mirroring Configuration screen fields 24. Port Mirroring Configuration Screen Fields Address a Field Description Monitor Unit/PortUnit/Port Y Address B Fields Description Port-based Monitoring ModesAddress-based Rate Limiting Configuration 29. Rate Limiting Configuration Screen 1 30. Rate Limiting Configuration Screen 2 Packet Type 26 describes the Rate Limiting Configuration screen fieldsRate Limiting Configuration Screen Fields Limit 27 describes the Igmp Configuration Menu screen options Igmp Configuration Menu27. Igmp Configuration Menu Screen Options Option Description Display Multicast Group Igmp ConfigurationMembership Igmp Configuration Screen Fields 28 describes the Igmp Configuration screen fieldsField Description Igmp Configuration Screen Fields Configuring Ports as Static Router Ports 28. Igmp Configuration Screen Fields Multicast Group Membership Multicast Group Membership Screen Options 29 describes the Multicast Group Membership screen optionsOption Description Port Statistics 34. Port Statistics Screen Gigabit MDA 30 describes the Port Statistics screen fieldsPort Statistics Screen Fields Port Statistics Screen Fields Single Collisions Pause Frames Console/Comm Port Configuration 31. Console/Comm Port Configuration Screen Fields Baud, 4800 Baud, 9600 Baud, 19200 Baud, 38400 Baud Telnet Switch FieldDescription Console SwitchPassword Type Console Stack Console Read-Only Switch PasswordField Description Telnet Stack Console Read-Write An Ascii string of up to 15 printable characters Any Ascii string of up to 15 printable characters Server Renumber Stack Units 36. Renumber Stack Units Screen 32 describes the Renumber Stack Units screen options 32. Renumber Stack Units Screen Options Spanning Tree Configuration Hardware Unit Information 38. Spanning Tree Configuration Menu Screen 33. Spanning Tree Configuration Menu Screen Options Spanning Tree Port Configuration 39. Spanning Tree Port Configuration Screen 1 40. Spanning Tree Port Configuration Screen 2 Spanning Tree Port Configuration Screen Fields Spanning Tree Port Configuration Screen Fields Display Spanning Tree Switch Settings 41. Spanning Tree Switch Settings Screen 35. Spanning Tree Switch Settings Parameters 35 describes the Spanning Tree Switch Settings parametersParameter Description Bridge Hello Parameter Description Forward DelayDelay Time Telnet Configuration 36 describes the Telnet Configuration screen fields 36. Telnet Configuration Screen Fields Login Timeout Login Retries Inactivity Event Logging Telnet Configuration Screen Fields Software Download 37 describes the Software Download screen fields 37. Software Download Screen Fields LED Indications During the Download Process New Image 38. LED Indications During the Software Download Process Phase Description LED IndicationsLink status LEDs ports 18 to 24 only The LEDs begin to Configuration File 44. Configuration File Download/Upload Screen Retrieve Configuration 39. Configuration File Download/Upload Screen FieldsCopy Configuration Image to Server Parameters Not Saved to the Configuration File These parameters are not saved Used in this screen See Display Event Log 45. Event Log Screen Excessive Bad Entries Write Threshold Flash Update 47. Sample Event Log Entry Exceeding the Write Threshold Reset 49. Self-Test Screen After Resetting the Switch 50. Nortel Networks Logo Screen Reset to Default Settings 51. Self-Test Screen After Resetting to Default Settings 116 53. Password Prompt Screen LogoutPage Chapter Troubleshooting Interpreting the LEDs Troubleshooting Diagnosing and Correcting the Problem Symptom Probable cause Corrective action Normal Power-Up SequenceCorrective Actions Port Connection Problems See Port Connection Problems on Autonegotiation Modes Port Interface Software Download Error Codes Software Download Error CodesError code Description Corrective action Center Page Environmental Parameter Operating Specification Storage SpecificationParameter Specifications Electrical Performance Specifications Physical DimensionsNetwork Protocol and Standards Compatibility Interface Options Safety Agency CertificationData Rate Electromagnetic Emissions Electromagnetic Immunity Declaration of Conformity Appendix B Media Dependent Adapters Type Model/Description See 10BASE-T/100BASE-TX MDA Label Description 100BASE-FX MDAs Figure B-2 BASE-FX MDA Front Panels Table B-2 BASE-FX MDA Components Installing an MDA Figure B-3. Installing an MDA Replacing an MDA with a Different Model Remove the AC power cord from the power sourceLoosen the thumbscrews and remove the MDA Page Appendix C Quick Steps to Features To learn more about Refer to this section Configuring 802.1Q VLANs To create or modify an 802.1Q VLAN, follow the flowcharts Figure C-2. Configuring 802.1Q VLANs 2 Figure C-3. Configuring 802.1Q VLANs 3 Configuring MultiLink Trunks Figure C-4. Configuring MultiLink Trunks Configuring Port Mirroring Figure C-5. Configuring Port Mirroring 1 Figure C-6. Configuring Port Mirroring 2 Configuring Igmp Snooping Figure C-7. Configuring Igmp Snooping 1 Figure C-8. Configuring Igmp Snooping 2 Figure C-9. Configuring Igmp Snooping 3 RJ-45 10BASE-T/100BASE-TX Port Connectors Figure D-1. RJ-45 8-Pin Modular Port Connector Pin Signal Description Table D-1 RJ-45 Port Connector Pin AssignmentsMDI and MDI-X Devices MDI-X to MDI Cable Connections Figure D-2. MDI-X to MDI Cable Connections MDI-X to MDI-X Cable Connections Figure D-3 MDI-X to MDI-X Cable Connections DB-9 RS-232-D Console/Comm Port Connector Table D-2 DB-9 Console/Comm Port Connector Pin AssignmentsPage Appendix E Default Settings Appears in this CI screen Field Default setting Using the BayStack 410-24T 10BASE-TSwitch Default Settings Using the BayStack 410-24T 10BASE-T Switch Console Switch Password Type Appears in this CI screen Field Default setting For details about this field, see Page Appendix F Sample BootP Configuration File Using the BayStack 410-24T 10BASE-T Switch Index Index-2 Index-3 Index-4 Index-5 Index-6