Cisco Systems 10000 Series guide

Upgrade Option 2: ESR-PRE2 Upgrade with Cold Start

This procedure assumes the following configuration:

•Cisco 10000 series chassis with two installed ESR-PRE2 processors

•A non-upgrade-enabled image such as 12.2(16)BX or earlier 12.3(7)XI1 or earlier on the PRE2s

Note The router will not be available for user traffic during Step 7 of the software upgrade, and traffic cannot resume until the upgrade is complete.

To perform the upgrade, follow these steps:

Step 1 Load the appropriate 12.2(28)SB image from the TFTP server into bootflash on both ESR-PRE2s.

Step 2 If the startup configuration is not up to date, save the running configuration using the write-memorycommand.

Step 3 Copy the startup configuration from the active ESR-PRE2 to a disk or TFTP server to save it for possible rollback.

Step 4 At the console, use the boot system bootflash:image_name command to edit your boot system variable to point to the 12.2(28)SB image in bootflash. Save the running configuration using the write memory command.

Use the show bootvar command to verify that the boot system variable has been altered appropriately on both the active and standby ESR-PRE2s.

If you do not want to make further changes to the startup configuration for the new command set offered by release 12.2(28)SB, skip to Step 7.

Note In some older releases, the configuration does not explicitly specify the redundancy mode. If your current configuration is one of these, and you want RPR+ operation with release 12.2(28)SB, you must add the line mode rpr-plusafter the line that specifies redundancy in the configuration on the TFTP server. Release 12.2(28)SB defaults to SSO mode unless it is explicitly configured for RPR+.

Step 5 Your startup configuration now reflects the altered boot system image. Copy it to the TFTP server and make any other needed edits. Then copy the altered configuration from the server to the startup configuration on the active and standby ESR-PRE2s using the copy tftp startup and copy tftp stby-nvram:startup-configcommands. Verify that the startup configuration has been copied to both the active and the standby NVRAM using the dir command and comparing file size.

Step 6 Verify again that the boot image and config-register are set appropriately using the show bootvar command.

Step 7 On the active ESR-PRE2, enter the reload command and type no if you are asked to save the running configuration.

•If the system is configured for autoboot, it will autoboot the new 12.2(28)SB image on both ESR-PRE2s.

•If the system is not configured for autoboot, both ESR-PRE2s will come up in ROM monitor after reloading. Boot the 12.2(28)SB image in bootflash from the ROM monitor prompt on each ESR-PRE2.

Upgrading to Cisco IOS Release 12.2(28)SB on a Cisco 10000 Series Router

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