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
at the following URL:
The Cisco Technical Support Website provides online documents and tools for troubleshooting and
resolving technical issues with Cisco products and technologies. Support is available 24 hours a day,
365 days a year, at this URL:
This web page has a link for email or phone technical support.
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.
Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA
© 2006 Cisco Systems, Inc. All rights reserved.
Cisco 10000 Router Performance Routing Engine Installation