Symmetric mode, Asymmetric mode | Nortel Networks 1000ASE-XD

Chapter 3 Using the console interface 133

Choosing a high speed flow control mode

The high speed flow control feature allows you to control traffic and avoid congestion on the Gigabit full-duplex link. If the receive port buffer becomes full, the BayStack 420 Switch issues a flow-control signal to the device at the other end of the link to suspend transmission. When the receive buffer is no longer full, the switch issues a signal to resume the transmission. You can choose Symmetric or Asymmetric flow control mode.

Symmetric mode

This mode allows both the GBIC port and its link partner to send flow control pause frames to each other.

When a pause frame is received (by either the GBIC port or its link partner), the port suspends transmission of frames for a number of slot times specified in the control frame or until a pause-release control frame is received. Both devices on the link must support this mode when it is selected.

Asymmetric mode

This mode allows the link partner to send flow control pause frames to the GBIC port. When a pause frame is received, the receiving port suspends transmission of frames for a number of slot times specified in the control frame or until a pause-release control frame is received.

In this mode, the GBIC port is disabled from transmitting pause frames to its link partner. Use this mode when the GBIC port is connected to a buffered repeater device.

MultiLink Trunk Configuration Menu screen

The MultiLink Trunk Configuration Menu screen (Figure 61) allows you to select the appropriate screen to configure up to six MultiLink Trunks (you can group up to four switch ports together to form each trunk).

You can configure up to six MultiLink Trunks in each stack, with trunk members in either a single unit or distributed between units within the stack configuration (distributed trunking).

Using the BayStack 420 10/100/1000 Switch

Image 133

Nortel Networks 1000ASE-XD, 1000BASE-SX Choosing a high speed flow control mode, MultiLink Trunk Configuration Menu screen

Contents

Using the BayStack 420 10/100/1000 Switch Trademarks Copyright 2001 Nortel NetworksRestricted rights legend Statement of conditions Japan/Nippon Requirements Only Using the BayStack 420 10/100/1000 SwitchTaiwan Requirements Canada Requirements Only Nortel Networks Inc. software license agreement Using the BayStack 420 10/100/1000 Switch 209418-A Contents Contents Chapter Network configuration Chapter Using the console interface Chapter Troubleshooting Appendix B Installing a Gigabit Interface Converter Gbic Contents 209418-A Using the BayStack 420 10/100 Ethernet Switch Configuring power workgroups and a shared media hub Choosing the MultiLink Trunk Configuration Menu screen Figures Figures 209418-A Tables Tables Before you begin Preface Text conventions Italic text Related publications Technical Solutions Center Telephone How to get help Preface 209418-A Physical description BayStack 420 Switch Front panel Components on the BayStack 420 Switch front panelConsole port Description Gigabit Interface Converter Gbic Port connectors LED display panel BayStack 420 Switch LED display panel Label Type Color State Meaning BayStack 420 Switch BayStack 420 Switch LED descriptions Components on the BayStack 420 Switch back panel Cascade Up and Down connectorsBack panel Cooling fans International power cord specifications AC power receptacleCountry/Plug description Specifications Typical plug Vorsicht Bitte sofort lesen Advertencia Sírvase leer inmediatamente Virtual Local Area Networks VLANs Features Security BayStack 420 Switch security feature BayStack 420 Switch MAC address-based security RADIUS-based network security Configuration parameters storage Switch software image storageFlash memory storage Port mirroring conversation steering MultiLink TrunkingAutosensing, autonegotiation, and autopolarity Standards RFCs Snmp MIB support Snmp MIB supportApplication Standard MIBs Proprietary MIBs Trap name Configurable Sent when RFC 1215 industry standard BootP automatic IP configuration/MAC addressSnmp trap support Support Snmp traps Configuration and switch management BayStack 420 Switch Desktop switch application Network configuration examples Network configuration Segment switch application BayStack 420 Switch used as a segment switch High-density switched workgroup application Unit Select switch BayStack 420 Switch stack operation Base unit Initial installationStack MAC address Stack up configurations Stack configurationsRemoving a unit from the stack Stack up configuration description Stack down configurations Stack down configuration description Stack down configuration example Ieee 802.1Q Vlan workgroups Port-based Vlan example Ieee 802.1Q tagging Network configuration Default Vlan settings Port-based Vlan assignment 802.1Q tag assignment VLANs spanning multiple 802.1Q tagged switches VLANs spanning multiple switches VLANs spanning multiple untagged switches Vlans spanning multiple untagged switches Possible problems with VLANs and Spanning Tree Protocol Multiple VLANs sharing resources Shared servers Vlan broadcast domains within the switch Default Vlan Configuration screen example Vlan Configuration screen example Default Vlan Port Configuration screen example Vlan workgroup summary Vlan Port Configuration screen example Vlan configuration spanning multiple switches MultiLink Trunks Vlan configuration rules Switch-to-switch trunk configuration example Switch-to-server trunk configuration example Client/server configuration using MultiLink Trunks Client/server configuration example Trunk configuration screen examples MultiLink Trunk Configuration Menu screen opens Figure Trunk configuration screen for Switch S1 MultiLink Trunk Configuration screen for Switch S1 Trunk configuration screen for Switch S2 Shows the MultiLink Trunk Configuration screen for Switch S2 Shows the MultiLink Trunk Configuration screen for Switch S3 Trunk Configuration screen for Switch S3 Trunk Configuration screen for Switch S4 Shows the MultiLink Trunk Configuration screen for Switch S4 Before you configure trunks Path Cost arbitration example Spanning tree considerations for MultiLink Trunks Example 1 correctly configured trunk Example 2 detecting a misconfigured port Port mirroring Additional tips about the MultiLink Trunking feature Yes Accessing the CI menus and screens Chapter Using the console interface Using the console interface Using the CI menus and screensNavigating the CI menus and screens Map of console interface screens Screen fields and descriptions Main menu Console interface main menu options Describes the CI main menu options Configuration Option Description Switch ConfigurationConfiguration File Reset Settings Option Description Reset to DefaultLogout Describes the IP Configuration/Setup screen fields IP Configuration/Setup screen IP Configuration/Setup screen fields Default Gateway Choosing a BootP request modeField Description In-Band Subnet Mask BootP When Needed BootP Disabled Describes the Snmp Configuration screen fields Snmp Configuration screenSnmp Configuration screen fields Field Description Read-Only Authentication Trap System Characteristics screenField Description Read-Write Trap #1 IP Address1 System Characteristics screen fields Describes the System Characteristics screen fields Last Reset Type Field Description Reset CountPower Status SysServices Switch Configuration Menu screen Switch Configuration Menu options Describes the Switch Configuration Menu options Option Description Clear All Port Statistics MAC Address Table screen MAC Address Table screen fields Describes the MAC Address Table screen fieldsField Description Aging Time Find an Address MAC Address Security Configuration Menu screen MAC Address Security Configuration Menu options Field Description MAC Address Security MAC Address Security Configuration screen fieldsSNMP-Locked Detected Field Description Partition Port on IntrusionPartition Time DA Filtering on Intrusion Current Learning Mode MAC Address Security Port Configuration screenField Description Clear by Ports Learn by Ports MAC Security Port Configuration screen 1 MAC Security Port Configuration screen fields Describes the MAC Security Port Configuration screen fieldsMAC Address Security Port Lists screens MAC Address Security Port Lists screens Describes the MAC Address Security Port Lists screen fields Port list syntaxMAC Address Security Port Lists screen fields Field Entry Port List Description Adding a new port to an existing port number list Accelerator keys for repetitive tasks Removing a port from an existing port number list MAC Address Security Table screens MAC Address Security Table screens MAC Address Security Table screen fields Describes the MAC Address Security Table screen fieldsField Description Find an Address Allowed Source Field Description Vlan Configuration Menu screen Vlan Configuration Menu options Describes the Vlan Configuration Menu optionsOption Description Vlan Configuration 122. This screen allows you to set up Vlan workgroups Vlan Configuration screen Vlan Configuration screen fields Describes the Vlan Configuration screen fieldsField Description Create Vlan Delete Vlan Management Vlan Vlan NameUser-Defined PID Vlan State Vlan Port Configuration screen Vlan Port Configuration screen fields Describes the Vlan Port Configuration screen fieldsField Description Unit Filter Untagged Frames Tagging Vlan Display by Port screenAuto Pvid Vlan Display by Port screen fields Describes the Vlan Display by Port screen fieldsVLANs Port Configuration screen Port Configuration screen fields Describes the Port Configuration screen fieldsStatus Link Field Description LnkTrap High Speed Flow Control Configuration screenAutonegotiation Speed/Duplex1 Flow Control High Speed Flow Control Configuration screen fields MultiLink Trunk Configuration Menu screen Choosing a high speed flow control modeSymmetric mode Asymmetric mode MultiLink Trunk Configuration Menu screen 209418-A Describes the MultiLink Trunk Configuration Menu options MultiLink Trunk Configuration screenMultiLink Trunk Configuration Menu options MultiLink Trunk Configuration screen fields Describes the MultiLink Trunk Configuration screen fieldsField Description Trunk Trunk Members MultiLink Trunk Utilization screen Trunk ModeField Description STP Learning Trunk Status MultiLink Trunk Utilization screen 1 Describes the MultiLink Trunk Utilization screen fields Port Mirroring Configuration screenMultiLink Trunk Utilization screen fields Port Mirroring Configuration screen fields Describes the Port Mirroring Configuration screen fieldsField Description Monitoring Mode Monitoring modes Port Statistics screenField Description Monitor Unit/Port Field Description Port-based Port Statistics screen Describes the Port Statistics screen fields Port Statistics screen fields Using the console interface Port Statistics screen fields Pause Frames Port 25 only System Log screen System Log screen fields Describes the System Log screen fieldsDisplay Messages From Field Description Display configuration Console/Comm Port Configuration screenComplete? Clear Messages From Console/Comm Port Configuration screen fields Describes the Console/Comm Port Configuration screen fields Console Switch Password Type Telnet Switch Password TypeSwitch Password Field Description Console Stack Default Value secure Range Field Description Console Read-Only Stack Password Secondary Radius Primary Radius ServerServer Radius UPD Port Renumber Stack Units screen Renumber Stack Units screen Describes the Renumber Stack Units screen fields Hardware Unit Information screenRenumber Stack Units screen fields Hardware Unit Information screen Spanning Tree Configuration Menu screen Spanning Tree Configuration Menu options Describes the Spanning Tree Configuration Menu optionsOption Description Spanning Tree Port Configuration Spanning Tree Switch Settings Spanning Tree Port Configuration screen 1 209418-A Spanning Tree Port Configuration screen Spanning Tree Port Configuration screen fields Spanning Tree Port Configuration screen 2 Priority Field Description ParticipationPath Cost Spanning Tree Switch Settings screen Spanning Tree Switch Settings parameters Describes the Spanning Tree Switch Settings parameters Delay Parameter Description Forward DelayBridge Hello Bridge Telnet Configuration screen 209418-A Telnet Configuration screen Telnet Configuration screen fields Describes the Telnet Configuration screen fields Field Description Allowed Source Software Download screen Using the console interface Describes the Software Download screen fields Diagnostics FilenameSoftware Download screen fields Field Description BayStack LED Indications during the download process Configuration File Download/Upload screenField Description Tftp Server IP Start Tftp Load Configuration File Download/Upload screen 209418-A Configuration File Download/Upload screen fields Requirements Parameters not saved to the configuration fileThese parameters are not saved Used in this screen See Interpreting the LEDs Chapter Troubleshooting LED display panel Troubleshooting Troubleshooting BayStack 420 Switch LED descriptions Diagnosing and correcting problems Symptom Probable cause Corrective action Normal power-up sequenceCorrective actions Autonegotiation modes Port connection problems Port interface Environmental Environmental specificationsElectrical Electrical parameters Performance specifications Physical dimensionsLists physical dimensions for the BayStack 420 Switch Appendix a Technical specifications Safety agency certificationNetwork protocol and standards compatibility Electromagnetic emissions Electromagnetic immunity BayStack 420 Switch meets the EN50082-11997 standard Product description Appendix B Installing a Gigabit Interface Converter Gbic Gbic labeling Appendix B Installing a Gigabit Interface Converter Gbic Gbic specifications Standards, connectors, cabling, and distanceGbic specifications are listed in Table Gbic Models Type Specifications Model 1000BASE-SX Gbic specificationsLaser Transmitter Characteristics Receiver Characteristics Model 1000BASE-LX Gbic specifications 1000BASE-XD Model 1000ASE-XD Gbic specifications 1000BASE-ZX Model 1000BASE-ZX Gbic specifications Handling, safety, and environmental guidelines Installing a Gbic Installing a Gbic Appendix C Quick configuration for MultiLink Trunking Configuring MultiLink Trunks Appendix C Quick configuration for MultiLink Trunking RJ-45 8-pin modular port connector RJ-45 10BASE-T/100BASE-TX port connectors RJ-45 port connector pin assignments Appendix D Connectors and pin assignmentsPin Signal Description MDI and MDI-X devices MDI-X to MDI cable connections MDI-X to MDI cable connections MDI-X to MDI-X cable connections DB-9 RS-232-D Console/Comm Port connector DB-9 Console port connector pin assignments Lists the DB-9 Console port connector pin assignments Appendix D Connectors and pin assignments 209418-A Field Default setting Appears in this CI screen Factory default settings Menu screen on Appendix E Default settings Factory default settings Port Configuration screen on Appendix E Default settings Port Mirroring Configuration screen Telnet Configuration screen on Appendix E Default settings 209418-A Using the BayStack 420 10/100 Switch Appendix F Sample BootP configuration file Appendix F Sample BootP configuration file Index Index Index Index Index