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Upgrading to CiscoIOS Release 12.2(28)SB on a Cisco 10000 Series Router
OL-8833-01
Upgrade Paths and Compatibility
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.
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 Table 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 Step3 of the upgrade, and traffic cannot resume until the upgrade
is complete.
Table1 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
Upgrade Option 1: ESR-PRE1 Upgrade with
Cold Start, page2
ESR-PRE2 12.2(16)BX or earlier
12.3(7)XI1 or earlier
Upgrade Option 2: ESR-PRE2 Upgrade with
Cold Start, page4
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
Upgrade Option 3: ESR-PRE1 Upgrade with
RPR Switchover, page 5
ESR-PRE2 12.3(7)XI2 or later Upgrade Option 4: ESR-PRE2 Upgrade with
RPR Switchover, page 8