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Cabletron Systems STS16-20D, STS16-20R manual Dynamic Source Route Recovery

Models: STS16-20R STS16-20D

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Dynamic Source Route Recovery

Dynamic Source Route Recovery (DSRR) is a proprietary protocol that enables a group of switches to handle a link or switch failure without session loss.

A basic redundant setup must have a minimum of two switches performing source route bridging between a legacy Token-Ring and an emulated Token-Ring (or another legacy ring) as illustrated in Figure 8.

	BRF
	Bridge No. B1
CRF	CRF
	A
	T
	M

	BRF
	Bridge No. B2
CRF	CRF
	A
	T
	M

Figure 8. Example of Dynamic Source Route Recovery, Base Configuration

This configuration already has redundant paths between the two rings, but since moving traffic from one path to the other involves changing source route, this would involve session loss.

When DSRR is enabled, an extra path is automatically created between the two rings for each switch, as shown in Figure 9. During normal operation, these extra paths do not forward any traffic.

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

Switch Overview

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Cabletron Systems STS16-20D, STS16-20R manual Example of Dynamic Source Route Recovery, Base Configuration

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 Preparing for Installation InstallationAccessing Switch Management Switch ConfigurationMenu 155 Monitoring the Network from the Console StatisticsVii Monitoring Port Traffic 211 Troubleshooting 215Monitoring the Network with Snmp 201 ViiiGetting in Touch with Technical Support 221 List of Figures List of Tables Xii SmartStack STS16-20D Token Ring Switch IntroductionSwitching Technology Switch of SwitchesSwitch of Hubs Switch of ServersSwitch of Desktops Switch of Floors and Buildings Switch of RoutersManagement Port Front Panel DetailsToken Ring Ports Switched Port Analyzer Reset ButtonSystem Request Button Status and Activity LEDs LabelsState Meaning Lists the port LEDs and their meanings Lists the stack-link LEDs and their meaningsConnection has been established to the stack Token Ring port is inserted into the ringBack Panel Details Back panel of the switches are illustratedLists the back panel connectors on the switch Name DescriptionFeatures Features and SpecificationsPerformance and Advanced Features Management Scalability and High AvailabilityInstallation Specifications CapacityPerformance Specifications PerformancePhysical Characteristics Support On SmartStack Specification Value Protocol compatibilitySpanning Tree Protocol STS16-20D only for Ports 17 to MIBs supportedSwitch Overview Multiple Simultaneous Conversations Low Latency SmartStack STS16-20R Token Ring Switch SmartStack STS16-20D Token Ring SwitchAddress Management Multiple Bridging Modes Source Route Switching SRS Source Route Bridging SRBSource Route Transparent SRT SRT/SRBFiltering Congestion ControlStore and Forward Three Switching ModesCut-Through Auto Adaptive Cut-ThroughToken Ring Port Operation Modes RI/RO-Like Connection on SmartStack STS16-20R Transmission Priority Queues ClearSession SupportCrossLink Connections Spanning Tree Protocol Support Vlan Support VlanDynamic Source Route Recovery Example of Dynamic Source Route Recovery, Base ConfigurationExample of Dynamic Source Route Recovery, Normal State Example of Dynamic Source Route Recovery, Switch 1 Failed Specification ManagementTelnet Management and VT100 Management Console SmartStack Manager for WindowsIBM LAN Network Manager Rmon Support Name Support Info Event Back-to-Back Built-in Port CountersStackable Architecture Internal StackerOptional Redundant Power Supply on SmartStack STS16-20R Safety Recommendations Preparing for InstallationSafety with Electricity Preventing Electrostatic Discharge Damage Site Requirements Chassis AccessibilityPower EnvironmentPreparing for Installation Configuration Guidelines Frame Length LimitIeee 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 Installation SummaryPackage Contents Materials needed for Installation Mounting the Chassis Rack or Cabinet MountingMounting the Switch in a Rack or Cabinet Table-MountingConnecting Devices to the Token Ring Ports CablingConnecting Devices to Token Ring Ports Checking the Installation Connecting using Building WiringApplying Power Back panel of the STS16-20DBack panel of the STS16-20R Stacker Link Module SmartStack STS-LM Front PanelConnector Description SmartStack STS-LM Connectors and LEDsConnecting the Stacker Link Cable State DescriptionWorking with a Stack Inter-box ParametersSend Authentication Traps, changing the Trap table in any Checking the InstallationMenu Parameter Using the switch console Accessing Switch ManagementSwitches can be configured in two ways Using Snmp based graphical management applicationsConnecting a Terminal Directly to the Management Port Connecting the ConsoleConnecting to the Management Port Using a Modem Specification Value XON/XOFFCommunication Problems Diagnostic Screen StkPortAccessing Switch Management Switch Configuration These users have full access to all configuration parameters General GuidelinesPassword Navigating within the MenusMain Menu Configuration Menu System Description Switch Configuration ScreenDram Installed Build DescriptionConfigured MAC Address Flash Memory InstalledBurned-in MAC Address System Name Address FormatSystem Location Time of Day Stack Configuration ScreenSystem Contact Number of BoxesModule Information Screen Board ID StatusModel HW RevVlan Configuration SmartStack STS16-20D/STS16-20R with four VLANsVlan Configuration Menu Brdg/Rng Vlan Configuration ScreenConfiguration → Vlan Configuration ReturnAdd Vlan Parameter Configuration for CRF ScreenView ChangeParent Vlan Bridging ModeVlan Name StateVlan Parameter Configuration for BRF Screen 802.1Q Vlan ID Bridge NumberLAA Vlan MAC Address Port Vlan Port ConfigurationConfiguration → Vlan Port Configuration TypeInterface MAC Address IP Configuration ScreenDefault Gateway IP AddressIP State Send PingBootP Requests and Parameters Snmp Configuration Menu Spanning Tree ProtocolIeee 802.1D Spanning Tree Protocol STP Spanning Tree for BRF Screen STP ParticipationBridge Priority 100Ieee STP Uses Bridge Functional Address Bridge Hello Time in Seconds101 Bridge Forward Delay in SecondsSpanning Tree for CRF Screen CRF & Port Spanning Tree ParametersSTP Priority 102 STP Mode BRF-to-CRFSwitch Priority STP CostSwitch Forward Delay in Seconds 103 Switch Hello Time in SecondsSwitch Maximum Message Age in Seconds Port Spanning Tree ParametersNumber of the port Port Spanning Tree Parameters Screen104 Priority105 Path Cost STP ModeCurrent Spanning Tree Information Screen To view more ports in the table106 Port Configuration ScreenName Cfg Loss Threshold 107 EnabledMedia Type Cfg Loss Sampling IntervalError Low Threshold Forwarding ModeError High Threshold Error Sampling Interval109 Media Speed Duplex ModeOperation Mode Max Explorer Rate on InputCrossLink Switched Port Analyzer Menu from the Configuration Menu110 111 CrossLink Menu 112CrossLink Configuration Screen 114 Clear Table Setting up a CrossLinkDeletes all CrossLinks Whether the specified CrossLink is active or not Current CrossLink Information Screen115 What ports are in that CrossLinkAddress Filtering 116Filters and Port Security Menu Configure FiltersConfigure Port Security Mode 117Index Configure Filters Screen118 Protocol Filters MAC AddressApplied Ports 119Exit Ports Security. Then select Configure Port Security Mode Configure Port Security Mode Screen120 Numerical order of entries View Port Filters Screen121 Description122 Port number Security ModeProtocol Filters Menu Security. Then select Protocol FiltersPort Filtering Attributes Protocol Class Assignment Screen123 Protocol Class Assignment ClassDSAPs Port Filtering Attributes Screen124 BlockNone Allow all frames in this protocol class default value 125Set at the Port Address Table Aging menu Address Aging126 Set at the Master Address Table Aging menu127 Address Aging MenuPort Address Table Aging Screen Then select Port Address Table AgingAging Time min 128 PortPort to which you want to assign an aging time Demand Aging Level129 Master Address Table Aging ScreenAging Time Password Menu Password is saved across warm boots and power cycles 131Console Configuration Menu Console/Telnet SessionsSerial Link Configuration Screen Stopping the Console Session Creating a Console Session Using a ModemSetting Value 134Telnet Configuration Screen Box Telnet Sessions Screen136 RemoteInvoluntary Termination of the Telnet Session Starting the Telnet SessionStopping the Telnet Session 137138 Displays more information Syslog Daemon Screen139 Deletes an entryModifies an existing entry 140 Change EntryZoom 141 Dsrr ConfigurationRestrictions 142 Primary and Traced Dsrr PortBox, Port Dsrr Group Configuration Screen143 GroupView and Change Dsrr Configuration Screen144 State Group StatusGroup Priority Backup for Primary PortBackup for Traced Port Hello Time146 ATM Address Download/Upload Menu BootstrapBoot 147Serial Link Download Screen 148149 Select Serial Link Download Select Main Image DownloadDownload/Upload Tftp Download/Upload Screen150 Tftp Server Address151 Execute name Download/UploadReset Switch With Diagnostics Reset ScreenNumber of Resets Since Diagnostics Reset Switch Without DiagnosticsPower-On Diagnostics 153 Reset Port Address TableClear Nonvolatile RAM 154 Monitoring the Network from the Console Statistics Menu 155Statistics Menu 156Switch Statistics Screen Pending Send Requests 158 Error Frames ReceivedFrames Lost Currently Active StationsPower Supply Information Screen 159Ins Port Status Screen160 Spd161 Oper Mode Fwd ModePort Statistics Menu 162General Statistics Screen Frames Unknown 164 MAC Frames ForwardedFrames Processed Broadcast Frames ReceivedAddress Table Overflows Frame Errors165 Address Chain Overflows Receive Buffer OverflowsLast Reset Config LossConfig Loss Reason 166 Ring Number MismatchAC Errors Line ErrorsBurst Errors Statistics ScreenLost Frame Errors Abort Transmit ErrorsInternal Errors Frame Copied ErrorsFrequency Errors RecoveriesLobe Wires 169 Transmit BeaconsRing Status State Information Screen170 Ring StateRing Speed Next Open Uptime When Beacon171 Upstream NeighborTXI Information DTR MAC Information Menu172 Station-CPort Information173 Error Report TimerTXI Information Screen Authorized Function ClassesMonitor State 174Join State Beacon Source AddressStation-CPort Information Screen CPort Phantom Drive Mask Common Access Protocol Mask176 Common Policy FlagsAddress Tables Menu 177Master Address Table Master Address Table Screen178 Address179 Search Master Route Descriptor Table Screen180 Master Route Descriptor Table181 Route hex Unknown182 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 Bridge ID Current Spanning Tree Information Screen185 Root IDMax Message Age Forward Delay186 Hello Time PIdDCst Designated Cost Dsg SwId/BrId Designated Switch Id/Bridge Id187 Dsg PId Designated Port Id188 Current Spanning Tree Information for a CRF ScreenRoot Port 189 Hello Time PId Port ID190 Dsg SwId/BrId Designated Bridge ID Dsg PId Designated Port Identifier191 Vlan StatisticsVlan Statistics Screen for CRF Parent BRFList of ports that belong to this CRF Vlan Statistics for BRF Screen192 Ports Vlan Statistics Screen for BRF appearsDsrr Status Tables Screen Dsrr Status Screens193 Neighbor Last Seen Dsrr Neighbor Table Screen194 Displays the next entry sorted by MAC Address195 Dsrr Acting as Backup Table ScreenTime Acting as Backup Closes the screen and returns to the Dsrr Status menuDiagnostic Test Results Screen 196197 Message ContentMessage Log Information Screen LogStart/End 198 BackClear Display Summary Screen Pressing ESC, you cancel and return to previous menu199 200 Monitoring the Network with Snmp Snmp SetupFollowing sections describe the Snmp setup menus 201Send Authentication Traps Snmp ConfigurationSnmp Configuration Screen Enable Rmon Statistics203 Snmp over MAC Configuration → Community StringsCommunity Strings Screen Community StringsCommunity 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 Active Monitoring Monitoring Port Traffic211 Passive Monitoring212 Analyzer Port Number Switched Port Analyzer Screen213 Monitored Port Number214 Troubleshooting in a Network TroubleshootingObtaining Service Start of Troubleshooting ProcessProcedure a Choosing a Troubleshooting ProcedureSymptom and LED State Go To Procedure BProcedure D Procedure C217 218 219 220 Getting in Touch with Technical Support 221Switch Configuration Problem Report FormSwitch Information 222Problem Description Network Installation Sketch 223224 Appendix A. Abbreviations 225226 MbpsTrBRF 227TrCRF 228 Appendix B. Cable and Pin Information Connecting to the Out-of-Band Management PortCable Function Cable Type or Cable Solution Out-of-Band Management Port and Cable Pin-OutsShell Pin Signal Name230 Management Port Pin-Out TIA/EIA-232 Modem Cable ConnectionsTIA/EIA-232 Null-Modem Cable for 25-pin Connector 231232 Ohm IBM STP Data Connector-to-RJ-45 Straight-Through CableTwisted-Pair Cable Pin Outs Straight-Through 100-Ohm/120-Ohm CableCable Type Impedance Cabling Recommendations233 Number Of Attaching DevicesRing Types Speed If using any 4 Mbps only adapters or filters234 Ring Speed Ohm Type Ohm CategoryRing 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 Index-2 194Index-3 Index-4 191Index-5 Index-6 Page 710001812