Switch Overview | Cabletron Systems STS16-20R, STS16-20D instruction

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2. Switch Overview

The SmartStack STS16-20D/STS16-20R is an IEEE 802.5-compliant device designed to boost throughput on Token Ring networks. It operates as a Media Access Control (MAC)-layer device that is protocol independent.

This chapter describes how the SmartStack STS16-20D/STS16-20R operates as a single stand-alone unit. The switch contains the following main elements, as listed below:

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Switching Bus—the architecture of the SmartStack STS16-20D/STS16-20R centers around the AXIS bus, a 520 Mbps switching fabric through which all switched ports communicate. The AXIS bus is a partially asynchronous time division multiplexed bus used for switching packets between heterogeneous LAN modules.

Token Ring Ports—each port can attach to a classical Token Ring segment or to a dedicated station (on SmartStack STS16-20D, ports 1–16 are workstation ports). Now users running basic applications are able to share bandwidth, and users running bandwidth-intensive applications can receive their own dedicated 16 Mbps port. Each dedicated port can also be set up in full-duplex communication mode, so that each 16 Mbps port doubles to 32 Mbps.

Stack Link Module—the SmartStack STS16-20D/STS16-20R switch family includes a stack link module that can be used to connect two SmartStack STS16-20D/STS16-20R family switches in a back-to-back configuration. Alternatively, up to five switches can be connected together using and internal stacker module, and up to eight switches can be connected together using the stack link module and an additional switch stack unit. By connecting switches together through the stack link module, the switches virtually combine to form a single unit, providing scalability, simplified management, and enhanced performance.

Switch Overview

SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide

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Cabletron Systems STS16-20R, STS16-20D manual Switch Overview

Contents

Page Page Order Number 9032956-01 OC-7054 v .1 Vcci Notice FCC NoticeIndustry Canada Notice Iii Declaration of Conformity AddendumApplication of Council Directives 89/336/EEC 73/23/EEC Table of Contents Installation Preparing for Installation Switch Configuration Accessing Switch Management Menu 155 Monitoring the Network from the Console StatisticsVii Viii Troubleshooting 215Monitoring the Network with Snmp 201 Monitoring Port Traffic 211 Getting in Touch with Technical Support 221 List of Figures List of Tables Xii Introduction SmartStack STS16-20D Token Ring Switch Switch of Switches Switching Technology Switch of Hubs Switch of ServersSwitch of Desktops Switch of Routers Switch of Floors and Buildings Management Port Front Panel DetailsToken Ring Ports Switched Port Analyzer Reset ButtonSystem Request Button Status and Activity LEDs LabelsState Meaning Token Ring port is inserted into the ring Lists the stack-link LEDs and their meaningsConnection has been established to the stack Lists the port LEDs and their meanings Name Description Back panel of the switches are illustratedLists the back panel connectors on the switch Back Panel Details Features Features and SpecificationsPerformance and Advanced Features Scalability and High Availability Management Installation Capacity Specifications Performance Performance Specifications Physical Characteristics STS16-20D only for Ports 17 to MIBs supported Specification Value Protocol compatibilitySpanning Tree Protocol Support On SmartStack Switch Overview Multiple Simultaneous Conversations Low Latency SmartStack STS16-20R Token Ring Switch SmartStack STS16-20D Token Ring SwitchAddress Management Multiple Bridging Modes Source Route Bridging SRB Source Route Switching SRS SRT/SRB Source Route Transparent SRT Congestion Control Filtering Auto Adaptive Cut-Through Three Switching ModesCut-Through Store and Forward Token Ring Port Operation Modes RI/RO-Like Connection on SmartStack STS16-20R ClearSession Support Transmission Priority Queues CrossLink Connections Spanning Tree Protocol Support Vlan Vlan Support Example of Dynamic Source Route Recovery, Base Configuration Dynamic Source Route Recovery Example of Dynamic Source Route Recovery, Normal State Example of Dynamic Source Route Recovery, Switch 1 Failed Management Specification Telnet Management and VT100 Management Console SmartStack Manager for WindowsIBM LAN Network Manager Rmon Support Name Support Info Event Internal Stacker Built-in Port CountersStackable Architecture Back-to-Back Optional Redundant Power Supply on SmartStack STS16-20R Safety Recommendations Preparing for InstallationSafety with Electricity Preventing Electrostatic Discharge Damage Environment Chassis AccessibilityPower Site Requirements Preparing for Installation Frame Length Limit Configuration Guidelines Ieee 802.1D Spanning Tree Ring Numbers Sample Uses of the SmartStack STS16-20RM Family Switches Typical Network without the SmartStack STS16-20D/STS16-20R Delivering Dedicated Bandwidth to Individual Workstations Deployment Scenarios Scenario using a Stacker Link and a Matrix Switch Setting Up CrossLinks Preparing for Installation Installation Summary Installation Package Contents Materials needed for Installation Rack or Cabinet Mounting Mounting the Chassis Table-Mounting Mounting the Switch in a Rack or Cabinet Cabling Connecting Devices to the Token Ring Ports Connecting Devices to Token Ring Ports Connecting using Building Wiring Checking the Installation Back panel of the STS16-20D Applying Power Back panel of the STS16-20R SmartStack STS-LM Front Panel Stacker Link Module State Description SmartStack STS-LM Connectors and LEDsConnecting the Stacker Link Cable Connector Description Inter-box Parameters Working with a Stack Send Authentication Traps, changing the Trap table in any Checking the InstallationMenu Parameter Using Snmp based graphical management applications Accessing Switch ManagementSwitches can be configured in two ways Using the switch console Connecting a Terminal Directly to the Management Port Connecting the ConsoleConnecting to the Management Port Using a Modem XON/XOFF Specification Value Communication Problems StkPort Diagnostic Screen Accessing Switch Management Switch Configuration General Guidelines These users have full access to all configuration parameters Navigating within the Menus Password Main Menu Configuration Menu Build Description Switch Configuration ScreenDram Installed System Description Configured MAC Address Flash Memory InstalledBurned-in MAC Address System Name Address FormatSystem Location Number of Boxes Stack Configuration ScreenSystem Contact Time of Day Module Information Screen HW Rev StatusModel Board ID SmartStack STS16-20D/STS16-20R with four VLANs Vlan Configuration Vlan Configuration Menu Return Vlan Configuration ScreenConfiguration → Vlan Configuration Brdg/Rng Change Vlan Parameter Configuration for CRF ScreenView Add State Bridging ModeVlan Name Parent Vlan Vlan Parameter Configuration for BRF Screen 802.1Q Vlan ID Bridge NumberLAA Vlan MAC Address Type Vlan Port ConfigurationConfiguration → Vlan Port Configuration Port IP Address IP Configuration ScreenDefault Gateway Interface MAC Address Send Ping IP State BootP Requests and Parameters Spanning Tree Protocol Snmp Configuration Menu Ieee 802.1D Spanning Tree Protocol STP STP Participation Spanning Tree for BRF Screen Bridge Hello Time in Seconds 100Ieee STP Uses Bridge Functional Address Bridge Priority CRF & Port Spanning Tree Parameters Bridge Forward Delay in SecondsSpanning Tree for CRF Screen 101 STP Cost 102 STP Mode BRF-to-CRFSwitch Priority STP Priority Port Spanning Tree Parameters 103 Switch Hello Time in SecondsSwitch Maximum Message Age in Seconds Switch Forward Delay in Seconds Priority Port Spanning Tree Parameters Screen104 Number of the port To view more ports in the table STP ModeCurrent Spanning Tree Information Screen 105 Path Cost 106 Port Configuration ScreenName Cfg Loss Sampling Interval 107 EnabledMedia Type Cfg Loss Threshold Error Sampling Interval Forwarding ModeError High Threshold Error Low Threshold Max Explorer Rate on Input Duplex ModeOperation Mode 109 Media Speed CrossLink Switched Port Analyzer Menu from the Configuration Menu110 111 112 CrossLink Menu CrossLink Configuration Screen 114 Clear Table Setting up a CrossLinkDeletes all CrossLinks What ports are in that CrossLink Current CrossLink Information Screen115 Whether the specified CrossLink is active or not 116 Address Filtering 117 Configure FiltersConfigure Port Security Mode Filters and Port Security Menu MAC Address Configure Filters Screen118 Protocol Filters Index Applied Ports 119Exit Ports Security. Then select Configure Port Security Mode Configure Port Security Mode Screen120 Description View Port Filters Screen121 Numerical order of entries Security. Then select Protocol Filters Port number Security ModeProtocol Filters Menu 122 Class Protocol Class Assignment Screen123 Protocol Class Assignment Port Filtering Attributes Block Port Filtering Attributes Screen124 DSAPs 125 None Allow all frames in this protocol class default value Set at the Master Address Table Aging menu Address Aging126 Set at the Port Address Table Aging menu Then select Port Address Table Aging Address Aging MenuPort Address Table Aging Screen 127 Demand Aging Level 128 PortPort to which you want to assign an aging time Aging Time min 129 Master Address Table Aging ScreenAging Time Password Menu 131 Password is saved across warm boots and power cycles Console/Telnet Sessions Console Configuration Menu Serial Link Configuration Screen 134 Creating a Console Session Using a ModemSetting Value Stopping the Console Session Telnet Configuration Screen Remote Telnet Sessions Screen136 Box 137 Starting the Telnet SessionStopping the Telnet Session Involuntary Termination of the Telnet Session 138 Deletes an entry Syslog Daemon Screen139 Displays more information Modifies an existing entry 140 Change EntryZoom 141 Dsrr ConfigurationRestrictions Primary and Traced Dsrr Port 142 Group Dsrr Group Configuration Screen143 Box, Port Group Status Dsrr Configuration Screen144 State View and Change Hello Time Backup for Primary PortBackup for Traced Port Group Priority 146 ATM Address 147 BootstrapBoot Download/Upload Menu 148 Serial Link Download Screen Select Serial Link Download Select Main Image Download 149 Tftp Server Address Tftp Download/Upload Screen150 Download/Upload Execute name Download/Upload 151 Reset Switch Without Diagnostics Reset ScreenNumber of Resets Since Diagnostics Reset Switch With Diagnostics Power-On Diagnostics 153 Reset Port Address TableClear Nonvolatile RAM 154 155 Monitoring the Network from the Console Statistics Menu 156 Statistics Menu Switch Statistics Screen Currently Active Stations 158 Error Frames ReceivedFrames Lost Pending Send Requests 159 Power Supply Information Screen Spd Port Status Screen160 Ins Fwd Mode 161 Oper Mode 162 Port Statistics Menu General Statistics Screen Broadcast Frames Received 164 MAC Frames ForwardedFrames Processed Frames Unknown Receive Buffer Overflows Frame Errors165 Address Chain Overflows Address Table Overflows 166 Ring Number Mismatch Config LossConfig Loss Reason Last Reset Statistics Screen Line ErrorsBurst Errors AC Errors Frame Copied Errors Abort Transmit ErrorsInternal Errors Lost Frame Errors 169 Transmit Beacons RecoveriesLobe Wires Frequency Errors Ring State State Information Screen170 Ring Status Upstream Neighbor Uptime When Beacon171 Ring Speed Next Open Station-CPort Information DTR MAC Information Menu172 TXI Information Authorized Function Classes Error Report TimerTXI Information Screen 173 Beacon Source Address 174Join State Monitor State Station-CPort Information Screen Common Policy Flags Common Access Protocol Mask176 CPort Phantom Drive Mask 177 Address Tables Menu Address Master Address Table Screen178 Master Address Table 179 Master Route Descriptor Table Master Route Descriptor Table Screen180 Search Unknown 181 Route hex 182 Vlan Address Table ScreenSelect Vlan Address Table 183 Vlan Route Descriptor Table ScreenSelect Vlan Route Descriptor Table 184 Locate MAC Address ScreenFirst Vlan to which the MAC address is known Root ID Current Spanning Tree Information Screen185 Bridge ID PId Forward Delay186 Hello Time Max Message Age Dsg PId Designated Port Id Dsg SwId/BrId Designated Switch Id/Bridge Id187 DCst Designated Cost 188 Current Spanning Tree Information for a CRF ScreenRoot Port PId Port ID 189 Hello Time Dsg PId Designated Port Identifier 190 Dsg SwId/BrId Designated Bridge ID Parent BRF Vlan StatisticsVlan Statistics Screen for CRF 191 Vlan Statistics Screen for BRF appears Vlan Statistics for BRF Screen192 Ports List of ports that belong to this CRF Dsrr Status Tables Screen Dsrr Status Screens193 Displays the next entry sorted by MAC Address Dsrr Neighbor Table Screen194 Neighbor Last Seen Closes the screen and returns to the Dsrr Status menu Dsrr Acting as Backup Table ScreenTime Acting as Backup 195 196 Diagnostic Test Results Screen Log Message ContentMessage Log Information Screen 197 Start/End 198 BackClear Display Summary Screen Pressing ESC, you cancel and return to previous menu199 200 201 Snmp SetupFollowing sections describe the Snmp setup menus Monitoring the Network with Snmp Enable Rmon Statistics Snmp ConfigurationSnmp Configuration Screen Send Authentication Traps Community Strings Configuration → Community StringsCommunity Strings Screen 203 Snmp over MAC Community Name 204Mode Trap Receivers Screen Configuration → Trap Receivers205 206 Add Entry List of Supported Traps from a STS16-20D/STS16-20RGeneral traps Enterprise specific traps from STS16.MIB 207Per Port Traps Traps for the Spanning Tree Protocol 208Traps for CrossLinks 209 210 Passive Monitoring Monitoring Port Traffic211 Active Monitoring 212 Monitored Port Number Switched Port Analyzer Screen213 Analyzer Port Number 214 Start of Troubleshooting Process TroubleshootingObtaining Service Troubleshooting in a Network Procedure B Choosing a Troubleshooting ProcedureSymptom and LED State Go To Procedure a Procedure D Procedure C217 218 219 220 221 Getting in Touch with Technical Support 222 Problem Report FormSwitch Information Switch Configuration 223 Problem Description Network Installation Sketch 224 225 Appendix A. Abbreviations Mbps 226 TrBRF 227TrCRF 228 Out-of-Band Management Port and Cable Pin-Outs Connecting to the Out-of-Band Management PortCable Function Cable Type or Cable Solution Appendix B. Cable and Pin Information TIA/EIA-232 Modem Cable Connections Pin Signal Name230 Management Port Pin-Out Shell 231 TIA/EIA-232 Null-Modem Cable for 25-pin Connector Straight-Through 100-Ohm/120-Ohm Cable Ohm IBM STP Data Connector-to-RJ-45 Straight-Through CableTwisted-Pair Cable Pin Outs 232 Number Of Attaching Devices Cabling Recommendations233 Cable Type Impedance Ring Speed Ohm Type Ohm Category If using any 4 Mbps only adapters or filters234 Ring Types Speed Ring Speed 100 or 120 Ohm Category 235Mbps 350 m 1148 ft 200 m 656 ft Not Supported 90 m 295 ft 236 Numerics IndexIndex-1 194 Index-2 Index-3 191 Index-4 Index-5 Index-6 Page 710001812