Cisco 10000 Installation Manual

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

This document describes how to upgrade a Cisco 10000 series router to Cisco IOS Release 12.2(28)SB on an ESR-PRE2 processor. Four different procedures are available; the choice of which to use depends on the specific system configuration you start from.

Upgrading a system that currently uses an ESR-PRE1 requires a hardware upgrade to an ESR-PRE2. For hardware installation instructions, see the Cisco 10000 Router Performance Routing Engine Installation at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/aggr/10000/hdwr/3971pr.htm

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This web page has a link for email or phone technical support.

Note All the procedures in this document are service-affecting. These procedures can require a hardware

replacement, forced switchover of the active PRE, or software reload. At some point during each process, the router will not be available for user traffic.

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Upgrade Paths and Compatibility

Table 1 shows the upgrade procedure options matched to the starting ESR-PRE version and Cisco IOS

release. Use the information in Tabl e 1 to determine which upgrade procedure to use.

Table 1 Upgrade Procedures Matched to ESR-PRE Version and IOS Release

Current Processor Cisco IOS Release Use Procedure...

ESR-PRE1 12.0(22)S

12.0(23)S

12.0(24)S

12.0(25)S

12.0(26)S

12.0(27)S3 or earlier

12.0(28)S1 or earlier

12.0(30)S2 or earlier

12.0(25)SX8 or earlier

ESR-PRE2 12.2(16)BX or earlier

12.3(7)XI1 or earlier

ESR-PRE1 12.0(30)S3 or later

12.0(27)S4 or later

12.0(28)S2 or later

12.0(25)SX9 or later

ESR-PRE2 12.3(7)XI2 or later Upgrade Option 4: ESR-PRE2 Upgrade with

Upgrade Option 1: ESR-PRE1 Upgrade with Cold Start, page 2

Upgrade Option 2: ESR-PRE2 Upgrade with Cold Start, page 4

Upgrade Option 3: ESR-PRE1 Upgrade with RPR Switchover, page 5

RPR Switchover, page 8

Caution In general, configurations for earlier releases are compatible with release 12.2(28)SB. However, some

configuration commands from release 12.2(28)SB may not be understood by earlier releases. It is always advisable to test the old configuration with the new image before installing the new image on the production network.

Upgrade Option 1: ESR-PRE1 Upgrade with Cold Start

This procedure assumes the following configuration:

• Cisco 10000 series chassis with two installed ESR-PRE1 processors.

• A non-upgrade-enabled image such as 12.0(25)SX6 or 12.0(27)S2 on the ESR-PRE1s; see Tabl e 1

for a list of affected images.

You need two ESR-PRE2s to replace the ESR-PRE1s.

Note This upgrade procedure requires a dual ESR-PRE hardware replacement. The hardware replacement

requires a cold reboot and therefore is a service-affecting hardware upgrade. The router will not be available for user traffic starting with Step 3 of the upgrade, and traffic cannot resume until the upgrade is complete.

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Upgrade Option 1: ESR-PRE1 Upgrade with Cold Start

To perform the upgrade, follow these steps:

Step 1 On the active ESR-PRE1, issue the write memory command to make sure the startup configuration is

up to date.

Step 2 Copy the saved startup configuration to a TFTP server and edit the configuration to reflect the new

capabilities of the 12.2(28)SB software. At a minimum, you must edit the boot system variable to point to the new image, using the boot system bootflash:image_name command and specifying your chosen image name.

Step 3 Remove both ESR-PRE1s, and install one ESR-PRE2 in one open slot. Make sure you have direct

console access to the ESR-PRE2.

Step 4 The boot image should load itself from bootflash (the expected behavior). If the ESR-PRE2 comes up in

ROM monitor, type boot to load the boot image.

Step 5 Configure the network management interface (typically FastEthernet 0/0/0) and the gateway IP address

the same as they were on the removed ESR-PRE1s to enable communications with the TFTP server.

Step 6 Copy the edited startup configuration from the TFTP server to your startup configuration using the copy

tftp startup command.

Step 7 Copy the 12.2(28)SB image from the TFTP server to bootflash, being sure to use the same name for the

image that you specified in Step 2 for the boot system variable in the startup configuration.

Step 8 Enter the reload command and type no when asked if you want to save your running configuration.

If the ESR-PRE2 config-register is set to 0x2, this command will autoboot the new image.

If the ESR-PRE2 config-register is set to 0x0, it will come up in ROM monitor. Boot the new image from ROM monitor using the boot bootflash:image_name command.

Step 9 After the ESR-PRE2 is up and running the new image, verify that the Cisco IOS version, configuration,

boot variable, and traffic are as expected.

Step 10 Shut down the FastEthernet 0/0/0 interface on the first ESR-PRE2 using the shut command. Then insert

the second ESR-PRE2 and repeat Step 4 through Step 8 for the second ESR-PRE2. After the second ESR-PRE2 has booted, use the no shut command on the active ESR-PRE2 to activate the FastEthernet 0/0/0 interface again.

Now the system should be operating as a dual-PRE redundant 12.2(28)SB system in the configured mode (either SSO or RPR+), running the properly modified startup configuration. You can verify the redundancy status using the show redundancy or show redundancy state command.

Step 11 Enter the write memory command from the active console to bring the startup configuration up to date

on the active and standby ESR-PRE2s.

Rollback Procedure for Option 1

To roll back to the ESR-PRE1 configuration:

Step 1 Remove both ESR-PRE2s and reinstall the ESR-PRE1s.

The ESR- PRE1s should operate as they did in the original setup.

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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-memory

command.

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-plus after 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-config commands. 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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At this point, the system should be operating as a dual-PRE redundant 12.2(28)SB system in the configured mode (either SSO or RPR+), running the properly modified startup configuration. You can verify the redundancy status using the show redundancy or show redundancy state command.

Step 8 Enter the write memory command from the active console to bring the startup configuration up to date

on the active and standby ESR-PRE2s.

Rollback Procedure for Option 2

To roll back to the original release:

Step 1 Copy the original startup configuration from the TFTP server to the startup configuration on the active

and standby ESR-PRE2s using the copy tftp startup and copy tftp stby-nvram:startup-config commands. (This is the configuration file you copied in Step 3 of the upgrade procedure.)

Step 2 Use the show bootvar command to verify that the boot system variable now points to the old image and

the config-register is set appropriately.

Step 3 Reload the active ESR-PRE2 using the reload command.

• If autoboot is set, the system should come up in the configured redundant mode (for older releases

that support redundancy).

Upgrade Option 3: ESR-PRE1 Upgrade with RPR Switchover

• If autoboot is not set, the system will come up to ROM monitor. From the ROM monitor prompt,

boot the proper image from the bootflash on each ESR-PRE2.

You have now reverted to the original system configuration.

Upgrade Option 3: ESR-PRE1 Upgrade with RPR Switchover

This procedure assumes the following configuration:

• Cisco 10000 chassis with two installed ESR-PRE1 processors

• An upgrade-enabled image such as 12.0(25)SX9 (or later) or 12.0(27)S4 (or later) on the

ESR-PRE1s; see Table 1 for a list of affected images.

You need two ESR-PRE2s with boot image installed in the bootflash to replace the ESR-PRE1s.

Note This upgrade procedure is service affecting. It requires a sequential PRE hardware replacement and a

switchover from the active to standby PRE. During the switchover in Step 10, the router will not be available for user traffic.

Note At several steps during this procedure, two PREs will alternately be using their FastEthernet0/0/0 NME

ports to copy files to and retrieve files from your TFTP server. Be certain that the FastEthernet0/0/0 port that is not in current use is shut down (using the shut command) and that the one in use is active (using the no shut command). Otherwise, collisions are likely if both ports are using the same IP address.

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