Cisco Systems RSP8 Configuring Nonstop Forwarding NSF, Configuring CEF NSF, Configuring BGP NSF

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Enabling High Availability Features

Configuring Nonstop Forwarding (NSF)

Cisco Nonstop Forwarding (NSF) always runs together with SSO. If you have not already configured SSO, refer to the “Configuring a Stateful Switchover (SSO)” section on page 49 . Cisco NSF is supported by the BGP, OSPF, and IS-IS protocols for routing and by Cisco Express Forwarding (CEF) for forwarding. Of the routing protocols, BGP, OSPF, and IS-IS have been enhanced with NSF-capability and awareness, which means that routers running these protocols can detect a switchover and take the necessary actions to continue forwarding network traffic and to recover route information from the peer devices. The IS-IS protocol can be configured to use state information that has been synchronized between the active and the standby RSP to recover route information following a switchover instead of information received from peer devices.

A device is said to be NSF-capable if it has been configured to support NSF; therefore, it would rebuild routing information from NSF-aware or NSF-capable neighbors.

Each protocol depends on CEF to continue forwarding packets during switchover while the routing protocols rebuild the Routing Information Base (RIB) tables. Once the routing protocols have converged, CEF updates the FIB table and removes stale route entries. CEF, in turn, updates the line cards with the new FIB information.

See the following sections for the NSF feature. Each task in the list is identified as either required or optional.

Configuring CEF NSF, page 52 (required)

Configuring BGP NSF, page 52 (required)

Configuring OSPF NSF, page 53 (required)

Configuring IS-IS NSF, page 53 (required)

Verifying CEF NSF, page 54 (optional)

Verifying BGP NSF, page 55 (optional)

Verifying OSPF NSF, page 56 (optional)

Verifying IS-IS NSF, page 56 (optional)

Troubleshooting NSF Features, page 58 (optional)

BGP NSF Configuration Example, page 59 (optional)

BGP NSF Neighbor Device Configuration Example, page 59 (optional)

OSPF NSF Configuration Example, page 59 (optional)

IS-IS NSF Configuration Example, page 59 (optional)

Configuring CEF NSF

The CEF NSF feature operates by default while the networking device is running in SSO mode. No configuration is necessary.

Configuring BGP NSF

Note You must configure BGP graceful restart on all peer devices participating in BGP NSF.

Route Switch Processor (RSP8) Installation and Configuration Guide

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Contents Document Contents Related Documentation Cisco.com, Obtaining Documentation,Product Description Topics discussed in this section areMonitoring interface and environmental status RSP8-Horizontal Front-Panel ViewFlash Eprom ROMmon Bus connectors Auxiliary port U12Shows the memory components on the RSP8 Memory ComponentsType Size Quantity Description Location There are no user-configurable jumpers on the RSP8 JumpersLEDs Flash Memory Cards and Flash DisksSerial Ports PC Card SlotsLED Label Color State Indication Specifications Lists the physical specifications for the RSP8Specifications System SoftwareSafety Guidelines Installation PrerequisitesSafety Warnings Installation Prerequisites Electrical Equipment Guidelines Telephone Wiring GuidelinesPreventing Electrostatic Discharge Damage Chassis Slot and Dram Requirements Compatibility RequirementsMemory Requirements Software Prerequisites Hardware PrerequisitesList of Parts and Tools Microcode RequirementsInstalling the RSP8 Removing the RSP8Ejector Levers and Captive Installation Screw Replacing the RSP8 Handling the RSP8 During Removal and Installation Connecting to the Auxiliary Port Connecting a Console TerminalUsing the Y-Cables for Console and Auxiliary Connections Restarting the System Shows the console Y-cable and shows the auxiliary Y-cableInstalling the RSP8 Router show version Configuring the Router for a Single RSP8 Using the Exec Command InterpreterConfiguring High System Availability HSA Active and Standby OperationHSA Implementation Methods HSA Configuration Task List HSA System RequirementsSpecifying the Default Standby RSP Command PurposeRouter# configure terminal Router# copy system running-config nvramstartup-configEnsuring that Both RSPs Contain the Same System Image Ensuring that Both RSPs Contain the Same Microcode Image Router# show controller cbusRouter# copy bootflashfilename slot0filename Router# dir slavebootflash slaveslot0 slaveslot1Slot1filename slavebootslotfilename Determines whether the standby RSP contains the same Router# copy source bootflash slot0 slot1Copies a different system image to the active RSP Upgrading to a New Software Version Example Now view the standby software image location and version BootflashRouter# copy tftp slot0rsp-pv-mz.120-22.3.S1 Routerconfig# config-register 0x010F Routerconfig# boot system tftp rsp-pv-mz.120-23.SBacking Up with an Older Software Version Example ANB Delete the rsp-pv-mz.120-22.3.S1image from the standby RSP Router# show bootflashRouter# delete slaveslot0rsp-pv-mz.120-22.3.S1 Manually Setting Environment Variables on the Standby RSP Router# copy system running-config startup-configRouter# copy running-config startup-config Routerconfig# slave sync configRouterconfig# hw-module slot image Monitoring and Maintaining HSA OperationInformation under that RSP’s ROM monitor control Specifies which image the standby runsHigh Availability Feature Overview Enabling High Availability FeaturesRouter# slave sync config Enabling High Availability Features Installation Procedures Hardware and Software PrerequisitesEnabling the Router This completes the procedure to enable the routerCopying an Image onto an RSP Router# copy tftp slot slot-number Router# copy tftp slaveslot slot-numberSetting the Config-Register Boot Variable Configuring RPR and RPR+Routerconfig# boot system flash Router# show versionRouterconfig# hw-module slot slot-numberimage file-spec Router# hw-module sec-cpu resetVerifying RPR and RPR+ Configuring RPR and RPR+ ExampleRouter# show redundancy Configuring a Stateful Switchover SSO Configuration file Saves the configuration changes to the startupVerifying SSO Router# show redundancy states my state = 13 -ACTIVE Router# show redundancy clientConfiguring CEF NSF Configuring Nonstop Forwarding NSFConfiguring BGP NSF Configuring Ospf NSF Configuring IS-IS NSFAs-number Graceful-restartVerifying CEF NSF Seconds adjacencyVerifying BGP NSF Router# show ip bgp neighborsRunning-config command This example, note the presence of NSF restart enabledVerifying Ospf NSF Verifying IS-IS NSFNetworking device Troubleshooting NSF Features NSF Troubleshooting TipsBGP NSF Configuration Example BGP NSF Neighbor Device Configuration ExampleOspf NSF Configuration Example IS-IS NSF Configuration ExamplePerforming a Fast Software Upgrade Specifies the image to be used by the standby RSP at Routerconfig# hw-module slot slot-number imageName of the image of the standby RSP Configuring Slcr Fast Software Upgrade ExampleRouter# redundancy force-switchover Routerconfig# service single-slot-reload-enableRPR, RPR+, SSO, and FSU Troubleshooting Tips Slcr Configuration ExampleSlcr Troubleshooting Tips Disabling SlcrTroubleshooting the Installation System Power LEDsMonitoring and Maintaining the Active and Standby RSPs Verifying LEDsRSP8 LEDs NormalVerifying System Startup Sequence Troubleshooting the Installation Troubleshooting a Router That is Failing to Boot Troubleshooting a Failed RSP8Maintenance Information Saving and Retrieving a Configuration FileReloading a Failed RSP Displaying a Stack Trace of an RSPUsing the ping Command to Ensure Connectivity Router# pingCopying the Configuration File Section on page 24 to enable the privileged levelMight 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 Product Numbers Quantity Dram Sockets Totals Sdram DimmRemoving DIMMs Polarization notchInstalling New DIMMs Inserting the DimmRecovering a Lost Password Checking the RSP Memory UpgradeInitialize the router using the i command as follows Pin Signal Direction Description Console Port SignalsReference Information Female DB-25 Pins Male DB-25 Pins Signal Description Auxiliary Port SignalsConsole and Auxiliary Y-Cable Pinouts Software Configuration Register Settings Male DB-25 Pins Female DB-25 Pins Signal DescriptionP1-5 J1-5 and J2-5 P1-7 J1-7 and J2-7 Ground P1-8 J1-8 and J2-8Boot Field Meaning Stays at the system bootstrap promptBoots the first system image in onboard Flash memory Bit Number Hexadecimal MeaningChanging Settings Routerconfig# config-register 0xvalueBit Meanings Tftp flash filenameAction/Filename Bit Enabling a Boot from Flash Memory Routerconfig# boot system flash devicefilenameBit Address net host Baud BitEnabling a Boot from the Flash Disk Using Flash Memory System# copy running-config startup-configObtaining Documentation Cisco.comObtaining Technical Assistance Documentation CD-ROMOrdering Documentation Documentation FeedbackCisco TAC Website Opening a TAC Case TAC Case Priority DefinitionsObtaining Additional Publications and Information Copyright 2004 Cisco Systems, Inc. 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