Cisco Systems RSP8 manual Enabling High Availability Features, High Availability Feature Overview

Page 41

Enabling High Availability Features

You can manually synchronize configuration files and ROM monitor environment variables on the active and the standby RSPs using the following command in privileged EXEC configuration mode:

Command

Purpose

 

 

Router# slave sync config

Manually synchronizes active and standby configuration

 

files.

 

 

Caution When you install a second RSP for the first time, you must immediately configure it using the slave sync config command. This ensures that the new standby RSP is configured consistently with the active RSP. Failure to do so might result in an unconfigured standby RSP taking control of the router when the active RSP fails, rendering the network inoperable.

The slave sync config command is also a useful tool for more advanced implementation methods not discussed in this document. Refer to the Cisco IOS Configuration Fundamentals Configuration Guide and the Cisco IOS Configuration Fundamentals Command Reference publications, which are available on the Documentation CD-ROM, online at Cisco.com, or as printed documents.

Enabling High Availability Features

This section discusses the following topics:

High Availability Feature Overview, page 41

Hardware and Software Prerequisites, page 43

Installation Procedures, page 43

RPR, RPR+, SSO, and FSU Troubleshooting Tips, page 63

High availability (HA), an alternative to the default high system availability (HSA) feature, is a series of features that minimizes system downtime through a “warm standby.” Warm standby allows the system to switch over to a standby RSP preloaded with a Cisco IOS image in 30 seconds to 5 minutes, depending on the feature. For more information on high service availability (HSA), the system default program, refer to the “Configuring High System Availability” section on page 25 . Like HSA, HA is supported on the Cisco 7507, Cisco 7507-MX, Cisco 7513, and Cisco 7513-MX routers with two RSP8s, or with one RSP8 and one RSP16.

A router configured for HA has two RSPs, an active RSP and a standby RSP. The active RSP controls all functions of the router, and the standby RSP monitors the active for failure.

High Availability Feature Overview

HA features include:

Single Line Card Reload (SLCR)—Speeds recovery of a failed router by reloading a failed line card without reloading other line cards on the network backplane. SLCR isolates the fault to a single Versatile Interface Processor (VIP2 or VIP4) or Legacy interface processor card, and accelerates recovery time by reloading only the faulty VIP or Legacy interface processor card. Physical lines and routing protocols on the other line cards of the network backplane remain active. The system continues forwarding packets with minimal interruptions.

Route Switch Processor (RSP8) Installation and Configuration Guide

 

OL-4920-02

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Contents Document Contents Cisco.com, Obtaining Documentation, Related DocumentationTopics discussed in this section are Product DescriptionRSP8-Horizontal Front-Panel View Monitoring interface and environmental statusU12 Flash Eprom ROMmon Bus connectors Auxiliary portType Size Quantity Description Location Memory ComponentsShows the memory components on the RSP8 Jumpers There are no user-configurable jumpers on the RSP8LEDs Flash Memory Cards and Flash DisksLED Label Color State Indication PC Card SlotsSerial Ports Lists the physical specifications for the RSP8 SpecificationsSpecifications System SoftwareSafety Warnings Installation PrerequisitesSafety Guidelines Installation Prerequisites Preventing Electrostatic Discharge Damage Telephone Wiring GuidelinesElectrical Equipment Guidelines Memory Requirements Compatibility RequirementsChassis Slot and Dram Requirements Hardware Prerequisites Software PrerequisitesMicrocode Requirements List of Parts and ToolsRemoving the RSP8 Installing the RSP8Ejector Levers and Captive Installation Screw Replacing the RSP8 Handling the RSP8 During Removal and Installation Using the Y-Cables for Console and Auxiliary Connections Connecting a Console TerminalConnecting to the Auxiliary Port Shows the console Y-cable and shows the auxiliary Y-cable Restarting the SystemInstalling the RSP8 Router show version Using the Exec Command Interpreter Configuring the Router for a Single RSP8HSA Active and Standby Operation Configuring High System AvailabilityHSA Implementation Methods HSA System Requirements HSA Configuration Task ListCommand Purpose Specifying the Default Standby RSPRouter# configure terminal Router# copy system running-config nvramstartup-configEnsuring that Both RSPs Contain the Same System Image Router# show controller cbus Ensuring that Both RSPs Contain the Same Microcode ImageSlot1filename slavebootslotfilename Router# dir slavebootflash slaveslot0 slaveslot1Router# copy bootflashfilename slot0filename Copies a different system image to the active RSP Router# copy source bootflash slot0 slot1Determines whether the standby RSP contains the same Upgrading to a New Software Version Example Router# copy tftp slot0rsp-pv-mz.120-22.3.S1 BootflashNow view the standby software image location and version Backing Up with an Older Software Version Example Routerconfig# boot system tftp rsp-pv-mz.120-23.SRouterconfig# config-register 0x010F ANB Router# delete slaveslot0rsp-pv-mz.120-22.3.S1 Router# show bootflashDelete the rsp-pv-mz.120-22.3.S1image from the standby RSP Router# copy system running-config startup-config Manually Setting Environment Variables on the Standby RSPRouterconfig# slave sync config Router# copy running-config startup-configMonitoring and Maintaining HSA Operation Routerconfig# hw-module slot imageInformation under that RSP’s ROM monitor control Specifies which image the standby runsRouter# slave sync config Enabling High Availability FeaturesHigh Availability Feature Overview Enabling High Availability Features Hardware and Software Prerequisites Installation ProceduresCopying an Image onto an RSP This completes the procedure to enable the routerEnabling the Router Router# copy tftp slaveslot slot-number Router# copy tftp slot slot-numberConfiguring RPR and RPR+ Setting the Config-Register Boot VariableRouterconfig# boot system flash Router# show versionRouter# hw-module sec-cpu reset Routerconfig# hw-module slot slot-numberimage file-specRouter# show redundancy Configuring RPR and RPR+ ExampleVerifying RPR and RPR+ Configuring a Stateful Switchover SSO Verifying SSO Saves the configuration changes to the startupConfiguration file Router# show redundancy client Router# show redundancy states my state = 13 -ACTIVEConfiguring BGP NSF Configuring Nonstop Forwarding NSFConfiguring CEF NSF Configuring IS-IS NSF Configuring Ospf NSFAs-number Graceful-restartSeconds adjacency Verifying CEF NSFRouter# show ip bgp neighbors Verifying BGP NSFThis example, note the presence of NSF restart enabled Running-config commandVerifying Ospf NSF Verifying IS-IS NSFNetworking device NSF Troubleshooting Tips Troubleshooting NSF FeaturesBGP NSF Neighbor Device Configuration Example BGP NSF Configuration ExampleOspf NSF Configuration Example IS-IS NSF Configuration ExamplePerforming a Fast Software Upgrade Name of the image of the standby RSP Routerconfig# hw-module slot slot-number imageSpecifies the image to be used by the standby RSP at Fast Software Upgrade Example Configuring SlcrRouter# redundancy force-switchover Routerconfig# service single-slot-reload-enableSlcr Configuration Example RPR, RPR+, SSO, and FSU Troubleshooting TipsSlcr Troubleshooting Tips Disabling SlcrSystem Power LEDs Troubleshooting the InstallationMonitoring and Maintaining the Active and Standby RSPs Verifying LEDsNormal RSP8 LEDsVerifying System Startup Sequence Troubleshooting the Installation Troubleshooting a Failed RSP8 Troubleshooting a Router That is Failing to BootSaving and Retrieving a Configuration File Maintenance InformationReloading a Failed RSP Displaying a Stack Trace of an RSPRouter# ping Using the ping Command to Ensure ConnectivitySection on page 24 to enable the privileged level Copying the Configuration FileMight include the name or address of a default file server Copy to this fileRouter# show startup-config Retrieving the Configuration File Replacing and Upgrading Dram DIMMs Sdram Dimm Product Numbers Quantity Dram Sockets TotalsPolarization notch Removing DIMMsInserting the Dimm Installing New DIMMsChecking the RSP Memory Upgrade Recovering a Lost PasswordInitialize the router using the i command as follows Reference Information Console Port SignalsPin Signal Direction Description Console and Auxiliary Y-Cable Pinouts Auxiliary Port SignalsFemale DB-25 Pins Male DB-25 Pins Signal Description Male DB-25 Pins Female DB-25 Pins Signal Description Software Configuration Register SettingsP1-5 J1-5 and J2-5 P1-7 J1-7 and J2-7 Ground P1-8 J1-8 and J2-8Stays at the system bootstrap prompt Boot Field MeaningBoots the first system image in onboard Flash memory Bit Number Hexadecimal MeaningRouterconfig# config-register 0xvalue Changing SettingsBit Meanings Tftp flash filenameAction/Filename Bit Routerconfig# boot system flash devicefilename Enabling a Boot from Flash MemoryBit Address net host Baud BitEnabling a Boot from the Flash Disk System# copy running-config startup-config Using Flash MemoryObtaining Documentation Cisco.comDocumentation CD-ROM Obtaining Technical AssistanceOrdering Documentation Documentation FeedbackTAC Case Priority Definitions Cisco TAC Website Opening a TAC CaseObtaining Additional Publications and Information Copyright 2004 Cisco Systems, Inc. All rights reserved