Table Of Contents
Route Processor Redundancy and Fast Software Upgrade on Cisco 7500 Series Routers
Related Features and Technologies
Supported Standards, MIBs, and RFCs
Setting the Config-Register Boot Variable
Performing a Fast Software Upgrade
Performing a Fast Software Upgrade Example
Route Processor Redundancy and Fast Software Upgrade on Cisco 7500 Series Routers
Feature History
This feature module describes Route Processor Redundancy (RPR) and Fast Software Upgrade (FSU) on Cisco 7500 series routers in Cisco IOS Release 12.0(16)ST. It includes information on the benefits of the new features, supported platforms, related documents, configuration examples, and a command reference.
This document includes the following sections:
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Supported Standards, MIBs, and RFCs
Feature Overview
Route Processor Redundancy (RPR) provides an alternative to the High System Availability (HSA) feature currently available on Cisco 7500 series routers. HSA enables a system to reset and use a standby Route Switch Processor (RSP) in the event of a failure of the active RSP.
Using RPR, you can reduce unplanned downtime. RPR enables a quicker switchover between an active and standby RSP in the event of a fatal error on the active RSP. When you configure RPR, the standby RSP loads a Cisco IOS image on bootup and initializes itself in standby mode. In the event of a fatal error on the active RSP, the system switches to the standby RSP, which reinitializes itself as the active RSP, reloads all of the line cards, and restarts the system.
Using Fast Software Upgrade (FSU), you can reduce planned downtime. With FSU, you can configure the system to switch over to a standby RSP that is preloaded with an upgraded Cisco IOS software image. FSU reduces outage time during a software upgrade by transferring functions to the standby RSP that has the upgraded Cisco IOS software pre-installed. The only downtime with a Fast Software Upgrade is the time required for the standby RSP to take control during the switchover. You can also use FSU to downgrade a system to an older version of Cisco OS or have a backup system loaded for downgrading to a previous image immediately after an upgrade.
Benefits
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Restrictions
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Related Features and Technologies
Single Line Card Reload
Related Documents
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Supported Platforms
Cisco 7500 series
Platform Support Through Feature Navigator
Cisco IOS software is packaged in feature sets that support specific platforms. To get updated information regarding platform support for this feature, access Feature Navigator. Feature Navigator dynamically updates the list of supported platforms as new platform support is added for the feature.
Feature Navigator is a web-based tool that enables you to quickly determine which Cisco IOS software images support a specific set of features and which features are supported in a specific Cisco IOS image.
To access Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions at http://www.cisco.com/register.
Feature Navigator is updated when major Cisco IOS software releases and technology releases occur. As of May 2001, Feature Navigator supports M, T, E, S, and ST releases. You can access Feature Navigator at the following URL:
http://www.cisco.com/go/fn
Supported Standards, MIBs, and RFCs
Standards
No new or modified standards are supported by this feature.
MIBs
No new or modified MIBs are supported by this feature.
To obtain lists of MIBs supported by platform and Cisco IOS release and to download MIB modules, go to the Cisco MIB website on Cisco.com at: http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.
RFCs
None
Prerequisites
RPR requires a Cisco 7500 series router loaded with two RSP8s or a combination of RSP2s and RSP4s.
Configuration Tasks
See the following sections for the configuration tasks required to run the RPR and FSU features.
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Copying an Image onto an RSP
Use TFTP to copy a high availability Cisco IOS image onto the active and standby RSPs:
Step 1
Router# copy tftp slotslot-number:
Address or name of remote host []? ip-addressName of file to copy []? imagename<Return>writing filename!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Destination file name? [imagename1] <Return>Accessing file 'imagename' on ip-address.. found !903500 bytes available for writing without erasure.Loading imagename from ip-address (via Ethernet1/0): ![OK - 3320245/4194176 bytes]Verifying via checksum...Flash verification successful. Length = 3320245, checksum = 0xA83DUses TFTP to copy a high availability Cisco IOS image onto the Flash memory card of the active RSP.1
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The router prompts you for the IP address of the TFTP server.
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The router prompts you for the name of the image file you are copying to the Flash memory card.
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The router prompts you to enter the name under which you want the file to appear at the destination.
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If you want the Flash memory card erased, enter y.
Step 2
Router# copy tftp slaveslotslot-number:
Address or name of remote host []? ip-addressName of file to copy []? imagename<Return>writing filename!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Destination file name? [imagename1] <Return>Accessing file 'imagename' on ip-address.. found !903500 bytes available for writing without erasure.Loading imagename from ip-address (via Ethernet1/0): ![OK - 3320245/4194176 bytes]Verifying via checksum...Flash verification successful. Length = 3320245, checksum = 0xA83DUses TFTP to copy a high availability Cisco IOS image onto the Flash memory card of the standby RSP.
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The router prompts you for the IP address of the TFTP server.
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The router prompts you for the name of the image file you are copying to the Flash memory card.
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The router prompts you to enter the name under which you want the file to appear at the destination.
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1 Before you copy a file to Flash memory, be sure there is ample space available in Flash memory. Compare the size of the file you are copying to the amount of available Flash memory shown. If the space available is less than the space required by the file you will copy, the copy process will continue, but the entire file will not be copied into Flash memory.
Setting the Config-Register Boot Variable
Though it is not required, we recommend that you modify the software configuration register boot field so that the system boots the same image that the hw-module slot slot-number image file-spec command specifies in the "Configuring RPR" section.
Step 1
Obtains the current configuration register setting.
Step 2
Router# configure terminal
Enters configuration mode, selecting the terminal option.
Step 3
Router(config)# boot system flash slotslot-number:[imagename]
Specifies the filename of an image stored in Flash memory.
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Step 4
Router(config)# config-register value
Modifies the existing configuration register setting to reflect the way in which you want to load a system image.
value—0x0 to 0xFFFFFFFF
Step 5
Router# Ctrl-Z
Exits configuration mode
Step 6
Router# reload
Reboots the router to make your changes take effect.
Configuring RPR
To configure RPR, enter the commands as shown below:
Performing a Fast Software Upgrade
To perform a Fast Software Upgrade, follow the steps below:
Step 1
Router# copy tftp slotslot-number:
Address or name of remote host []? ip-addressName of file to copy []? imagename<Return>writing filename!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Destination file name? [imagename1] <Return>Accessing file 'imagename1' on ip-address.. found !903500 bytes available for writing without erasure.Loading imagename from ip-address (via Ethernet1/0): ![OK - 3320245/4194176 bytes]Verifying via checksum...Flash verification successful. Length = 3320245, checksum = 0xA83DUses TFTP to copy a high availability Cisco IOS image onto the Flash memory card of the active RSP.1
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The router prompts you for the IP address of the TFTP server.
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The router prompts you for the name of the image file you are copying to the Flash memory card.
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The router prompts you to enter the name under which you want the file to appear at the destination.
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Step 2
Router# copy tftp slaveslotslot-number:
Address or name of remote host []? ip-addressName of file to copy []? imagename<Return>writing filename!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Destination file name? [imagename1] <Return>Accessing file 'imagename1' on ip-address.. found !903500 bytes available for writing without erasure.Loading imagename from ip-address (via Ethernet1/0): ![OK - 3320245/4194176 bytes]Verifying via checksum...Flash verification successful. Length = 3320245, checksum = 0xA83DUses TFTP to copy a high availability Cisco IOS image onto the Flash card of the standby RSP.
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The router prompts you for the IP address of the TFTP server.
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The router prompts you for the name of the image file you are copying to the Flash memory card.
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The router prompts you to enter the name under which you want the file to appear at the destination.
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Step 3
Router# configure terminal
Enters configuration mode.
Step 4
Router(config)# hw-module slot slot-number image file-spec
Verifies that the specified image is compatible with RPR and exists on the standby RSP. If a high availability image is found, the running configuration is updated.
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Step 5
Router(config)# hw-module slot slot-number image file-spec
Verifies that the specified image is compatible with RPR and exists on the active RSP. If a high availability image is found the running configuration is updated.
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Step 6
Router(config)# hw-module sec-cpu reset
Resets and reloads the standby RSP with the specified Cisco IOS image and executes the image.
Note
Step 7
Router(config)# slave auto-sync config
(Optional) Turns on automatic synchronization of configuration files. Use this command to ensure that the active and standby RSPs contain the same configuration files.
Step 8
Router(config)# end
Exits configuration mode.
Step 9
Router# copy running-config startup-config
Saves the configuration changes to your startup configuration in NVRAM so the router boots with the configuration you have entered.
Step 10
Router# redundancy force-switchover
Forces a switchover to the standby RSP.
1 Before you copy a file to Flash memory, be sure there is ample space available in Flash memory. Compare the size of the file you are copying to the amount of available Flash memory shown. If the space available is less than the space required by the file you will copy, the copy process will continue, but the entire file will not be copied into Flash memory.
Verifying RPR
Use the show redundancy command to verify that RPR is enabled:
Router# show redundancyOperating mode is rprredundancy mode rprhw-module slot 2 image slot0:rsp-pv-mzhw-module slot 3 image slot0:rsp-pv-mzTroubleshooting Tips
Use the commands in the table below to troubleshoot the RPR and FSU features on the Cisco 7500 series routers:
Configuration Examples
This section provides the following configuration example:
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Configuring RPR Example
In the following example, the active RSP is in slot 2 and the standby RSP is installed in slot 3 of a Cisco 7507 router.
Router# copy tftp slot0:rsp-pv-mzRouter# copy tftp slaveslot0:rsp-pv-mzRouter# configure terminalRouter(config)# hw-module slot 2 image slot0:rsp-pv-mzRouter(config)# hw-module slot 3 image slot0:rsp-pv-mzRouter(config)# redundancyRouter(config-r)# mode rprRouter(config-r)# exitRouter(config)# hw-module sec-cpu resetRouter(config-r)# endRouter# show running-configversion 12.0service timestamps debug uptimeservice timestamps log uptimeno service password-encryptionservice single-slot-reload-enable!hostname Router1!boot system rcp://path/to/image/rsp-boot-mzboot system tftp://path/to/image/rsp-boot-mzboot bootldr bootflash:rsp-boot-mzenable password password!redundancymode rpr !--indicates Redundancy mode has been configured for RPR!hw-module slot 2 image slot0:rsp-pv-mzhw-module slot 3 image slot0:rsp-pv-mzip subnet-zeroip rcmd remote-username router1ip cef distributedip host iphost 192.168.0.1mpls traffic-eng auto-bw timers!!controller T3 6/0/0clock source line!!interface Ethernet0/0/0ip address 10.0.0.1 255.255.0.0no ip directed-broadcastip route-cache distributedno keepalive...exec-timeout 0 0history size 40transport preferred nonetransport input noneline aux 0line vty 0 4login!endPerforming a Fast Software Upgrade Example
The following example show a Fast Software Upgrade performed on a Cisco 7507 router with an active RSP in slot 2 and a standby RSP installed in slot 3.
Router# copy tftp slot0:rsp-pv-mzRouter# copy tftp slaveslot0:rsp-pv-mzRouter# configure terminalRouter(config)# hw-module slot 2 image slot0:rsp-pv-mzRouter(config)# hw-module slot 3 image slot0:rsp-pv-mzRouter(config)# hw-module sec-cpu resetRouter(config)# endRouter# copy running-config startup-configRouter# redundancy force-switchoverCommand Reference
This section documents new commands. All other commands used with this feature are documented in the Cisco IOS Release 12.0 command reference publications.
hw-module sec-cpu reset
To reset and reload the standby RSP with the specified Cisco IOS image and execute the image, use the hw-module sec-cpu reset command in configuration mode.
hw-module sec-cpu reset
Syntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values.
Command Modes
Configuration
Command History
Usage Guidelines
Before using this command, you must use the hw-module slot image configuration command to specify a high availability Cisco IOS image to run on the standby RSP. After the high availability image is loaded in the active RSP, use the hw-module sec-cpu reset command to reset and reload the standby RSP with the specified Cisco IOS image and execute the image. To load the standby RSP with the bundled micro-IOS contained in the active RSP image, use the no form of the hw-module slot image command followed by the hw-module sec-cpu reset command.
Examples
The following example shows a Cisco 7513 router with the standby RSP loaded in slot 7. The standby RSP is reset and reloaded with the rsp-pv-mz high availability Cisco IOS image. Both RSPs have slot 0 Flash memory cards:
Router(config)# hw-module slot 7 image slot0:rsp-pv-mzRouter(config)# hw-module sec-cpu resetRouter(config)# endRelated Commands
hw-module slot image
To specify a high availability Cisco IOS image to run on a standby RSP, use the hw-module slot image command in configuration mode. To remove a high availability Cisco IOS image from the running configuration, use the no form of this command.
hw-module slot slot-number image file-spec
no hw-module slot slot-number image file-spec
Syntax Description
slot-number
Specifies the RSP slot.
file-spec
Specifies the Flash memory card to load the image into and the name of the image.
Defaults
No default behavior or values.
Command Modes
Configuration
Command History
Usage Guidelines
Use the hw-module slot image command to specify a high availability Cisco IOS image to run on a standby RSP.
Examples
The following example shows a Cisco 7513 router with the active RSP loaded in slot 6 and the standby RSP loaded in slot 7. The rsp-pv-mz high availability Cisco IOS image is specified to run on the standby RSP. Both RSPs have slot 0 Flash memory cards:
Router(config)# hw-module slot 6 image slot0:rsp-pv-mzRouter(config)# hw-module slot 7 image slot0:rsp-pv-mzRelated Commands
Resets and reloads the standby RSP with the specified Cisco IOS image and executes the image.
Enters redundancy configuration mode.
Configures the high availability mode.
mode (redundancy)
To configure the high availability mode, use the mode command in redundancy configuration mode. To use the default redundancy mode, use the no form of this command.
mode {hsa | rpr}
no mode {hsa | rpr}
Syntax Description
Defaults
High System Availability redundancy mode
Command Modes
Redundancy configuration
Command History
Usage Guidelines
The mode selected by the mode command in redundancy configuration mode must be fully supported by the image that has been set into both the active and standby RSPs. A high availability image must be installed into the RSPs before RPR can be configured. Use the hw-module slot image command to specify a high availability image to run on the standby RSP.
If the mode cannot be set on both RSPs, HSA is the default mode. HSA is the redundancy mode of a Cisco 7500 series router that has only one RSP installed.
Examples
The following example enters redundancy configuration mode and sets RPR as the redundancy mode for a Cisco 7500 series router.
Router(config)# redundancyRouter(config-r)# mode rprRouter(config-r)# endRelated Commands
redundancy
To enter redundancy configuration mode, use the redundancy command in configuration mode.
redundancy
Syntax Description
This command has no arguments or keywords.
Defaults
No default behaviors or values.
Command Modes
Configuration
Command History
Usage Guidelines
Use this command to enter redundancy configuration mode.
Examples
In the following example, the router is entered into redundancy configuration mode.
Router(config)# redundancyRouter(config-r)#Related Commands
redundancy force-switchover
To switch control of a router from the active to the standby RSP, use the redundancy force-switchover command in privileged EXEC mode.
redundancy force-switchover
Syntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values.
Command Modes
Privileged EXEC
Command History
Usage Guidelines
Use the redundancy force-switchover command to switch control of a Cisco 7500 series router from the active RSP to the standby RSP. Both the active and standby RSPs must have a high availability Cisco IOS image installed and must be configured for RPR redundancy mode before the redundancy force-switchover command can be used.
Examples
The following example shows a switchover from the active RSP to the standby RSP on a Cisco 7513 router with RPR configured:
Router# configure terminalRouter(config)# hw-module slot 7 image slot0:rsp-pv-mzRouter(config)# hw-module slot 6 image slot0:rsp-pv-mzRouter(config)# hw-module sec-cpu resetRouter(config)# slave auto-sync configRouter(config)# endRouter# copy running-config startup-configRouter# redundancy force-switchoverRelated Commands
show redundancy
To display the current redundancy mode, use the show redundancy command in EXEC mode.
show redundancy
Syntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values.
Command Modes
EXEC
Command History
11.2 GS
This command was introduced.
12.0(16)ST
This command was modified to display information on RPR.
Usage Guidelines
Use this command to display the redundancy mode of a Cisco 7500 series router. The default redundancy mode is High System Availability. Use the redundancy configuration command to enter redundancy configuration mode. Use the mode rpr command in redundancy configuration mode to configure RPR as the high availability mode. HSA is the default high availability mode.
The following example shows output for the show redundancy command for a router with RPR configured:
Router# show redundancyredundancy mode rprhw-module slot 2 image slot0:rsp-pv-mzhw-module slot 3 image slot0:rsp-pv-mzRelated Commands
Glossary
Active RSP—The RSP that controls and runs the routing protocols, and presents the system management interface.
FSU—Fast Software Upgrade. A mechanism to upgrade the Cisco IOS software images on RSPs and line cards without reinitializating the entire system.
HSA—High System Availability. HSA enables a system to reset and use a standby RSP in the event of a failure of the active RSP.
RPR—Route Processor Redundancy. An alternative to HSA that reduces unplanned downtime.
RSP—Route Switch Processor. The Route Processor on the Cisco 7500 series router.
Standby RSP—The RSP that waits ready to take over the functions of the active RSP in the event of unplanned or planned downtime.