Cisco 7500 SERIES ROUTE SWITCH PROCESSOR 16 Specification Guide

Configure the system to boot first from the Cisco IOS Release 12.0(23.4)S1 system image and then from
the Cisco IOS Release 12.0(23.3)S1 system image:

Router# configure terminal

Router(config)# boot system flash slot0:rsp-pv-mz.120-23.4.S1

Router(config)# boot system flash slot0:rsp-pv-mz.120-23.3.S1

Configure the system further with a fault-tolerant booting strategy:

Router(config)# boot system tftp rsp-pv-mz.120-23.3.S1 10.1.1.25

Set the configuration register to enable loading of the system image from a network server or from Flash
memory and save the changes to the active and the standby startup configuration file:

Router(config)# config-register 0x010F

Router(config)# end

Router# copy system: running-config startup-config

You do not need to reload the router in this example, because the router is currently running the
Cisco IOS Release 12.0(23.4)S1 image.

This completes the sample procedure for backing up with an older software version.

You can optionally set environment variables on both RSPs in a Cisco 7507, Cisco 7507-MX,
Cisco 7513, or Cisco 7513-MX.

When you configure the HSA operation, we recommend that you use the default environment variables.
If you do change the variables, we recommend that you set the same device for equivalent environment
variables on each RSP16 card. For example, if you set one RSP16 card CONFIG_FILE environment
variable to NVRAM, then set the other RSP CONFIG_FILE environment variable to NVRAM also.

You set environment variables on the active RSP just as you would if it were the only RSP in the system.
You can set the same environment variables on the standby RSP manually or automatically.

The following sections describe these two methods:

For more complete configuration information on how to set environment variables, refer to the Cisco IOS
Configuration Fundamentals Configuration Guide and the Cisco IOS Configuration Fundamentals
Command Reference publications, which are available online on Cisco.com, on the Documentation
CD-ROM, or as printed documents.

Once you set the active RSP16 environment variables, you can manually set the same environment
variables on the standby RSP16 card using the slave sync config command.