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Route Processor Redundancy Plus (RPR+)

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Route Processor Redundancy Plus (RPR+)

Contents

Prerequisites for Route Processor Redundancy Plus (RPR+)

Restrictions for Route Processor Redundancy Plus (RPR+)

Information About Route Processor Redundancy Plus (RPR+)

RPR

RPR+

How to Configure Route Processor Redundancy Plus (RPR+)

Copying an Image onto Active and Standby RSPs

Prerequisites

What to Do Next

Setting the Configuration Register Boot Variable

Examples

Configuring RPR+

Restrictions

Verifying RPR+

Configuration Examples for Route Processor Redundancy Plus (RPR+)

Configuring RPR+: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Command Reference

hw-module sec-cpu reset

hw-module slot image

redundancy

redundancy force-switchover

show redundancy (HSA redundancy)

Glossary


Route Processor Redundancy Plus (RPR+)

Route Processor Redundancy (RPR) provides an alternative to the High System Availability (HSA) feature. HSA enables a system to reset and use a standby Route Switch Processor (RSP) if the active RSP fails. Using RPR, you can reduce unplanned downtime because RPR enables a quicker switchover between an active and standby RSP if the active RSP experiences a fatal error.

RPR Plus (RPR+) is an enhancement of the RPR feature. RPR+ keeps the Versatile Interface Processors (VIPs) from being reset and reloaded when a switchover occurs between the active and standby RSPs.

Feature History for the Route Processor Redundancy Plus (RPR+) Feature

Release
Modification

12.0(19)ST1

This feature was introduced.

12.0(22)S

This feature was integrated into Cisco IOS Release 12.0(22)S.

12.2(14)S

This feature was integrated into Cisco IOS Release 12.2(14)S.

12.3(7)T

This feature was integrated into Cisco IOS Release 12.3(7)T.


Finding Support Information for Platforms and Cisco IOS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.

Contents

•Prerequisites for Route Processor Redundancy Plus (RPR+)

•Restrictions for Route Processor Redundancy Plus (RPR+)

•Information About Route Processor Redundancy Plus (RPR+)

•How to Configure Route Processor Redundancy Plus (RPR+)

•Configuration Examples for Route Processor Redundancy Plus (RPR+)

•Additional References

•Command Reference

•Glossary

Prerequisites for Route Processor Redundancy Plus (RPR+)

RPR and RPR+ require a Cisco 7500 series router loaded with two RSP16s, one RSP16 and one RSP8, two RSP8s, or a combination of RSP2s and RSP4s. If you are using the one RSP16 and one RSP8 combination, you must use the same memory—256 MB—in both RSPs because the secondary RSP must be able to support the primary RSP during a failover.

Restrictions for Route Processor Redundancy Plus (RPR+)

•RSP1s do not support RPR or HSA.

•RPR is supported only on routers that support dual RSPs. Only the Cisco 7507 and Cisco 7513 support dual RSPs.

•RPR+ operates only in a system with VIPs as the line cards. Systems with legacy interface processors default to RPR.

•Channelized Interface Processors (CIPs) do not support RPR and RPR+.

•In RPR+ mode, configuration changes done through Simple Network Management Protocol (SNMP) may not be automatically configured on the standby RSP after a switchover occurs.

•RPR+ does not work on routers configured with MPLS.

Information About Route Processor Redundancy Plus (RPR+)

To configure Route Processor Redundancy Plus (RPR+), you should understand the following concepts:

•RPR

•RPR+

RPR

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) if the active RSP fails.

Using RPR, you can reduce unplanned downtime. RPR enables a quicker switchover between an active and standby RSP if the active RSP experiences a fatal error. 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.

RPR+

The RPR+ feature is an enhancement of the RPR feature on Cisco 7500 series routers. RPR+ keeps the VIPs from being reset and reloaded when a switchover occurs between the active and standby RSPs. Because VIPs are not reset and microcode is not reloaded on the VIPs, and the time needed to parse the configuration is eliminated, switchover time is reduced to 30 seconds.

Table 1 describes the average time for a router to switchover to a standby RSP if the active RSP fails.

Table 1 Average Switchover Time Comparison Table 

Feature
Time to Immediately Switch a Packet on New RSP After Failover
Expected Overall Time to Have New RSP in New High Availability State After Failover
Notes

HSA

10 minutes

20 minutes

System default.

RPR

5 minutes

15 minutes

VIPs and legacy interface processors (IPs) supported.1

RPR+

30 seconds

11 minutes

VIPs supported.2

1 Channelized Interface Processors (CIPs) do not support RPR and RPR+.

2 Legacy IPs default to RPR. To allow RPR+ for VIPs when up to two legacy IPs exist in the router, you must configure the service single-slot-reload-enable command. If you do not enable the service single-slot-reload-enable command or if you have more than two legacy IPs, all the line cards are reloaded.


Note Table 1 shows average switchover times. Recovery time will vary depending on the configuration of the router.

Note Channelized Interface Processors (CIPs) do not support RPR and RPR+.

In Table 1 we have noted that RPR+ supports up to two legacy IPs in the router if the service single-slot-reload-enable command is configured. By default, the existence of any legacy IPs in the router causes all the line cards to be reloaded during an RPR+ switchover and a message similar to the following to be displayed: 

%HA-2-MAX_NO_Quiesce: 1 linecard(s) not quiesced exceeds limit of 0, all slots will be 
reloaded.

If the service single-slot-reload-enable command is configured, then the NO_Quiesce limit is set to two, allowing two quiesce failures during an RPR+ switchover. When more than two legacy IPs exist in the router, all the line cards are reloaded during an RPR+ switchover, and a message similar to the following is displayed: 

%HA-2-MAX_NO_Quiesce: 3 linecard(s) not quiesced exceeds limit of 2, all slots will be 
reloaded.

How to Configure Route Processor Redundancy Plus (RPR+)

This section contains the following tasks:

•Copying an Image onto Active and Standby RSPs (required)

•Setting the Configuration Register Boot Variable (optional)

•Configuring RPR+ (required)

•Verifying RPR+ (optional)

Copying an Image onto Active and Standby RSPs

Perform this task to use TFTP to copy a high availability Cisco IOS image onto the active and standby RSPs.

Prerequisites

Before copying a file to flash memory, you must ensure that there is enough space available in flash memory. Compare the size of the file that you are copying to the amount of available flash memory shown. If the space available is less than the space required by the file that you will copy, the copy process will not continue and and error message similar to the following will be displayed:

%Error copying tftp://image@server/tftpboot/file-location/image-name (Not enough space on
device).

SUMMARY STEPS

1. enable

2. copy tftp slotslot-number:

3. copy tftp slaveslotslot-number:

DETAILED STEPS

Step 1 enable

Enables privileged EXEC mode. Enter your password if prompted. 

Router> enable

Step 2 copy tftp slotslot-number:

Use this command to copy a high availability Cisco IOS image onto the flash memory card of the active RSP. The slotslot-number keyword and argument specify the flash memory card of the active RSP. 

Router# copy tftp slot0:


Address or name of remote host []? ip-address

Enter the IP address of the TFTP server that contains the new image. 

Router# 172.18.2.3


Source filename []? image-name

Enter the name of the image file that you are copying to the flash memory card. 

Router# rsp-pv-mz


Destination file name? [image-name1] <Return>

Enter the name under which you want the image file to appear at the destination. The destination name is optional. To use the same image name as the source file, press the Enter key. 

Accessing tftp://ip-address/...

Step 3 copy tftp slaveslotslot-number:

Use this command to copy a high availability Cisco IOS image onto the flash memory card of the standby RSP. The slaveslotslot-number keyword and argument specify the flash memory card of the standby RSP. 

Router# copy tftp slaveslot0:


Address or name of remote host []? ip-address

Enter the IP address of the TFTP server that contains the new image. 

Router# 172.18.2.3


Source filename []? image-name

Enter the name of the image file that you are copying to the flash memory card. 

Router# rsp-pv-mz


Destination file name? [image-name1] <Return>

Enter the name under which you want the image file to appear at the destination. The destination name is optional. To use the same image name as the source file, press the Enter key. 

Accessing tftp://ip-address/...

What to Do Next

If you do not want to modify the software configuration register boot field, proceed to the "Configuring RPR+" section.

Setting the Configuration Register Boot Variable

Perform this optional task to modify the software configuration register boot field to ensure that the system boots the same image as that specified by the hw-module slot image command in the "Configuring RPR+" section.

SUMMARY STEPS

1. enable

2. show version

3. configure terminal

4. boot system flash slotslot-number:[image-name]

5. config-register value

6. exit

7. reload

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

show version

Example:

Router# show version

Displays the current configuration register setting at the end of the display.

Step 3 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 4 

boot system flash slotslot-number:[image-name]

Example:

Router(config)# boot system flash slot0:rsp-pv-mz

Specifies the filename of an image stored in flash memory.

•slot-number:—Specifies the active RSP slot where the flash memory card is located. Valid slot numbers are 0 and 1 for the Cisco 7500 series RSP.

•image-name—Specifies the name of the image. It is recommended that you set the boot variable so that the system boots the same image as that specified by the hw-module slot slot-number image file-spec command. See Step 3 of the "Configuring RPR+" section.

Step 5 

config-register value

Example:

Router(config)# config-register 0x2102

Modifies the existing configuration register setting to reflect the way in which you want to load a system image.

•Use the value argument to specify the configuration register setting. Valid values are in the range from 0x0 to 0xFFFF.

•In this example, when a reload command is issued, the router automatically boots the image specified in the boot system flash image-name configuration.

Step 6 

exit

Example:

Router(config)# exit

Exits global configuration mode and returns to privileged EXEC mode.

Step 7 

reload

Example:

Router# reload

Reboots the router to make your configuration changes take effect.

Examples

The following is sample partial output from the show version command; the output displays the current configuration register setting. 

Router# show version


Cisco IOS Software, C7500 Software (C7500-IPBASE-MZ), Version 12.3(7)T,  RELEASE)

TAC Support: http://www.cisco.com/tac

Copyright (c) 1986-2004 by Cisco Systems, Inc.

Compiled Fri 16-Jan-04 18:03 by engineer


ROM: System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)

.

.

.

Configuration register is 0x2102

Configuring RPR+

Perform this task to configure RPR+.

Restrictions

RPR+ operates only in a system with VIPs as the line cards. Systems with legacy IPs default to RPR mode. Up to two legacy IPs can be supported by RPR+ if the service single-slot-reload-enable command is configured. For more details, see the "RPR+" section.

SUMMARY STEPS

1. enable

2. configure terminal

3. hw-module slot slot-number image file-spec

4. Repeat Step 3 for the standby RSP.

5. redundancy

6. mode {hsa | rpr | rpr-plus}

7. exit

8. copy system:running-config nvram:startup-config

9. hw-module sec-cpu reset

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

hw-module slot slot-number image file-spec

Example:

Router(config)# hw-module slot 6 image slot0:rsp-pv-mz

Specifies a high availability Cisco IOS image to run on an active RSP.

•Use the slot-number argument to specify the RSP slot.

•Use the file-spec argument to specify the flash memory card to load the image into and the name of the image.

•In this example, the active RSP is loaded in slot 6.

Step 4 

Repeat Step 3 for the standby RSP.

Example:

Router(config)# hw-module slot 7 image slot0:rsp-pv-mz

Repeat Step 3 to specify a high availability Cisco IOS image to run on the standby RSP.

•In this example, the standby RSP is loaded in slot 7.

Step 5 

redundancy

Example:

Router(config)# redundancy

Enters redundancy configuration mode.

Step 6 

mode {hsa | rpr | rpr-plus}

Example:

Router(config-r)# mode rpr-plus

Configures the redundancy mode.

•Use the rpr-plus keyword to configure the mode as RPR+ on both the active and standby RSPs.

•If no mode is specified, the default mode is HSA.

Step 7 

exit

Example:

Router(config-r)# exit

Exits redundancy configuration mode and returns to global configuration mode.

•Repeat this step one more time to exit global configuration mode.

•Exiting global configuration mode after the redundancy mode has been set to RPR+ will trigger a timer to run for a few seconds, after which the standby RSP resets and reloads.

Step 8 

copy system:running-config nvram:startup-config

Example:

Router# copy system:running-config nvram:startup-config

(Optional) Copies the running configuration to the startup configuration to save the RPR+ configuration.

•This command can be run manually immediately after exiting global configuration mode when the redundancy mode is set to RPR+, or it can be run after the standby RSP is reloaded and initialized.

Step 9 

hw-module sec-cpu reset

Example:

Router# hw-module sec-cpu reset

(Optional) Resets and reloads the standby RSP with the specified Cisco IOS image and executes the image.

•Although changing the redundancy mode to RPR+ will trigger a reload, using this command may initiate the standby RSP reset a few seconds faster than the automatic reload.

Note If you do not specify a Cisco IOS image in Step 3, this command loads and executes the bundled default Cisco IOS standby image. The system then operates in HSA mode.

Verifying RPR+

Perform this task to verify whether RPR+ is configured on the router and to display other redundancy statistics.

SUMMARY STEPS

1. enable

2. show redundancy

DETAILED STEPS

Step 1 enable

Enables privileged EXEC mode. Enter your password if prompted. 

Router> enable

Step 2 show redundancy

Use this command to verify what type of redundancy is configured on the router and to display other redundancy information. 

Router# show redundancy


Operating mode is rpr-plus

redundancy mode rpr-plus

hw-module slot 2 image disk0:rsp-pv-mz

hw-module slot 3 image disk0:rsp-pv-mz


The system total uptime since last reboot is 5 days, 19 hours 36 minutes.

The system has experienced 27 switchovers.

The system has been active (become master) for 5 days, 15 hours 14 minutes.

Reason for last switchover:User forced.

Configuration Examples for Route Processor Redundancy Plus (RPR+)

This section contains the following example:

•Configuring RPR+: Example

Configuring RPR+: Example

In the following example, the active RSP is installed in slot 2 and the standby RSP is installed in slot 3 of a Cisco 7507 router. 

Router# copy tftp slot0:rsp-pv-mz

Router# copy tftp slaveslot0:rsp-pv-mz

Router# configure terminal

Router(config)# hw-module slot 2 image slot0:rsp-pv-mz

Router(config)# hw-module slot 3 image slot0:rsp-pv-mz

Router(config)# redundancy 

Router(config-r)# mode rpr-plus

Router(config-r)# end

Router# hw-module sec-cpu reset

Router# show running-config

version 12.3(7)T

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

service single-slot-reload-enable

!

hostname Router

!

boot system rcp://path/to/image/rsp-boot-mz

boot system tftp://path/to/image/rsp-boot-mz

boot bootldr bootflash:rsp-boot-mz

enable password password

!

redundancy 

 mode rpr-plus ! Indicates that redundancy mode has been configured for RPR+.

!

hw-module slot 2 image slot0:rsp-pv-mz

hw-module slot 3 image slot0:rsp-pv-mz

ip subnet-zero

ip rcmd remote-username Router

ip cef distributed

ip host iphost 192.168.0.1

mpls traffic-eng auto-bw timers

!

!

controller T3 6/0/0

 clock source line

!

!

interface Ethernet0/0/0

 ip address 10.0.0.1 255.255.0.0

 no ip directed-broadcast

 ip route-cache distributed

 no keepalive

.

.

.

exec-timeout 0 0

 history size 40

 transport preferred none

 transport input none

line aux 0

line vty 0 4

 login

!

end

Additional References

The following sections provide references related to RPR+.

Related Documents

Related Topic
Document Title

File management and other configuration commands: complete command syntax, command mode, defaults, usage guidelines, and examples

Cisco IOS Configuration Fundamentals and Network Management Command Reference, Release 12.3 T

File management and other configuration examples

Cisco IOS Configuration Fundamentals and Network Management Configuration Guide

Fast Software Upgrade

Route Processor Redundancy and Fast Software Upgrade on Cisco 7500 Series Routers feature document, Release 12.0(16)ST

Single Line Card Reload (SLCR)

Cisco 7500 Single Line Card Reload feature document, Release 12.1(5a)E


Standards

Standards
Title

No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

—


MIBs

MIBs
MIBs Link

No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs


RFCs

RFCs
Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

—


Technical Assistance

Description
Link

Technical Assistance Center (TAC) home page, containing 30,000 pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/public/support/tac/home.shtml


Command Reference

This section documents new and modified commands only.

•hw-module sec-cpu reset

•hw-module slot image

•redundancy

•redundancy force-switchover

•show redundancy (HSA redundancy)

hw-module sec-cpu reset

To reset and reload the standby Route Switch Processor (RSP) with the specified Cisco IOS image and execute the image, use the hw-module sec-cpu reset command in privileged EXEC mode.

hw-module sec-cpu reset

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.0(16)ST

This command was introduced.

12.0(19)ST1

This command was enabled in privileged EXEC mode.

12.0(22)S

This command was integrated into Cisco IOS Release 12.0(22)S.

12.2(14)S

This command was integrated into Cisco IOS Release 12.2(14)S.

12.3(7)T

This command was integrated into Cisco IOS Release 12.3(7)T.


Usage Guidelines

Before using this command, you must use the hw-module slot image global 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 software 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-mz

Router(config)# end

Router# hw-module sec-cpu reset

Related Commands

Command
Description

hw-module slot image

Specifies a high availability Cisco IOS image to run on an active or standby RSP.


hw-module slot image

To specify a high availability Cisco IOS image to run on an active or standby Route Switch Processor (RSP), use the hw-module slot image command in global 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 number of the RSP slot.

file-spec

Specifies the flash memory card to load the image into and the name of the image.


Defaults

No high availability Cisco IOS images are specified to run on the active or standby RSPs.

Command Modes

Global configuration

Command History

Release
Modification

12.0(16)ST

This command was introduced.

12.3(7)T

This command was integrated into Cisco IOS Release 12.3(7)T.


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 both the active and the standby RSP. Both RSPs have slot 0 flash memory cards: 

Router(config)# hw-module slot 6 image slot0:rsp-pv-mz

Router(config)# hw-module slot 7 image slot0:rsp-pv-mz

Related Commands

Command
Description

hw-module sec-cpu reset

Resets and reloads the standby RSP with the specified Cisco IOS image and executes the image.

mode (HSA redundancy)

Configures the redundancy mode.

redundancy

Enters redundancy configuration mode.


redundancy

To enter redundancy configuration mode, use the redundancy command in global configuration mode.

redundancy

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

Global configuration

Command History

Release
Modification

12.0(16)ST

This command was introduced.

12.3(7)T

This command was integrated into Cisco IOS Release 12.3(7)T.


Examples

In the following example, the router enters redundancy configuration mode. 

Router(config)# redundancy 

Router(config-r)#

Related Commands

Command
Description

hw-module sec-cpu reset

Resets and reloads the standby RSP with the specified Cisco IOS image and executes the image.

hw-module slot image

Specifies a high availability Cisco IOS image to run on a standby RSP.

mode (HSA redundancy)

Configures the redundancy mode.


redundancy force-switchover

To switch control of a router from the active to the standby Route Switch Processor (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

Release
Modification

12.0(16)ST

This command was introduced.

12.3(7)T

This command was integrated into Cisco IOS Release 12.3(7)T.


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 Route Processor Redundancy (RPR) or RPR Plus (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 terminal

Router(config)# hw-module slot 7 image slot0:rsp-pv-mz

Router(config)# hw-module slot 6 image slot0:rsp-pv-mz

Router(config)# slave auto-sync config

Router(config)# redundancy

Router(config-r)# mode rpr

Router(config-r)# end

Router# copy running-config startup-config

Router# redundancy force-switchover

Related Commands

Command
Description

hw-module sec-cpu reset

Resets and reloads the standby RSP with the specified Cisco IOS image and executes the image.

hw-module slot image

Specifies a high availability Cisco IOS image to run on a standby RSP.

mode (HSA redundancy)

Configures the redundancy mode.

redundancy

Enters redundancy configuration mode.


show redundancy (HSA redundancy)

To display the current redundancy mode, use the show redundancy command in user EXEC or privileged EXEC mode.

show redundancy

Syntax Description

This command has no arguments or keywords.

Command Modes

User EXEC
Privileged EXEC

Command History

Release
Modification

11.2 GS

This command was introduced.

12.0(16)ST

This command was modified to display information about Route Processor Redundancy (RPR).

12.0(19)ST1

This command was modified to display information on RPR Plus (RPR+).

12.3(7)T

The command modifications to support RPR and RPR+ were integrated into Cisco IOS Release 12.3(7)T.


Usage Guidelines

Use this command to display the redundancy mode of a Cisco 7500 series router. The default redundancy mode is High System Availability (HSA). 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.

Examples

The following is sample output from the show redundancy command for a router with RPR configured: 

Router# show redundancy


redundancy mode rpr

hw-module slot 2 image slot0:rsp-pv-mz

hw-module slot 3 image slot0:rsp-pv-mz

Related Commands

Command
Description

hw-module sec-cpu reset

Resets and reloads the standby RSP with the specified Cisco IOS image and executes the image.

hw-module slot image

Specifies a high availability Cisco IOS image to run on a standby RSP.

mode (HSA redundancy)

Configures the redundancy mode.

redundancy

Enters redundancy configuration mode.


Glossary

Active RSP—The RSP that controls and runs the routing protocols and that presents the system management interface.

HSA—High System Availability. HSA enables a system to reset and use a standby RSP if the active RSP fails.

RPR—Route Processor Redundancy. An alternative to HSA that reduces unplanned downtime.

RPR+—Route Processor Redundancy Plus. An enhancement to RPR in which the standby RSP is fully initialized. An RPR+ switchover does not involve resetting line cards or reloading line card software for VIPs. Legacy interface processors are reset and reloaded during switchover.

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.

Note Refer to Internetworking Terms and Acronyms for terms not included in this glossary.

Copyright © 2005 Cisco Systems, Inc. All rights reserved.