Dynamic Source Route Recovery | Cabletron Systems STS16-20D instruction

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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

Image 46

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