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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:
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365 days a year, at this URL:
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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.