Enabling High Availability Features

 

Command

Purpose

 

 

 

Step 3

Router(config)# hw-module slot slot-numberimage file-spec

Specifies the image to be used by the standby RSP

 

 

at initialization. If a high-availability image is

 

 

found, the running configuration is updated.

 

 

slot-number—Specifies the standby RSP slot

 

 

where the Flash memory card or Flash Disk is

 

 

located. Valid numbers are slot 2 or slot 3 for

 

 

a Cisco 7507 router or slot 6 or slot 7 for a

 

 

Cisco 7513 router.

 

 

file-spec—Indicates the Flash device and the

 

 

name of the image on the active RSP.

 

 

Note Step 2 and Step 3 are the same; Step 2

 

 

applies to the active RSP and Step 3

 

 

applies to the standby RSP.

 

 

Note The image indicated by the file-spec

 

 

attribute must be available on the local

 

 

Flash device. Remote protocols such a

 

 

TFTP and remote copy are not available.

 

 

 

Step 4

Router(config)# redundancy

Enters redundancy configuration mode.

 

 

 

Step 5

Router(config-red)# mode sso

Sets the redundancy configuration mode to SSO on

 

 

both the active and standby RSP.

 

 

Note After configuring SSO mode, the standby

 

 

RSP automatically resets.

 

 

 

Step 6

Router(config-red)# end

Exits redundancy configuration mode and returns

 

 

you to privileged EXEC configuration mode.

 

 

 

Step 7

Router# copy running-config startup-config

Saves the configuration changes to the startup

 

 

configuration file.

 

 

 

Configuring Frame Relay Autosynchronization LMI Sequence Numbers

The autosynchronization procedure is only for devices supporting Frame Relay and is optional. To configure Frame Relay SSO to synchronize LMI sequence numbers between the active and standby RSPs, use the following command in global configuration mode.

Command

Purpose

 

 

Router(config)# frame-relay redundancy

Configures automatic synchronization of Frame

auto-sync lmi-sequence-numbers

Relay LMI sequence numbers between the active RSP

 

and the standby RSP.

 

 

Verifying SSO

To verify that SSO is configured on the networking device, use the show redundancy command. To verify that the device is running in SSO mode, use the show redundancy states command. The show redundancy states command specifies whether the unit is running in SSO mode, which is indicated by

STANDBY HOT.

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Cisco Systems RSP8 manual Verifying SSO, Saves the configuration changes to the startup, Configuration file