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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
Technical Support
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:
http://www.cisco.com/techsupport
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.
