Upgrading A Pre3 To A Pre4 - Cisco 10008 Installation And Configuration Manual

Upgrading a PRE3 to a PRE4

This section describes the following procedures to perform a hardware upgrade from a PRE3 to a PRE4:
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You can upgrade a PRE3 to a PRE4 using the In Service Upgrade (ISU) feature. A PRE3 to PRE4 ISU
is non-service impacting. Powering down the router is not required.
A PRE3 to PRE4 upgrade without ISU is a service impacting upgrade. The router is not available for
user traffic during the upgrade, and traffic cannot resume until the upgrade is complete.
Upgrading a PRE3 to a PRE4 Using ISU
This section describes the procedure to perform a PRE3 to PRE4 upgrade using the ISU feature:
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Prerequisites
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Upgrade Considerations
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OL-13840-01
Upgrading a PRE3 to a PRE4 Using ISU, page 27
Upgrading a PRE3 to a PRE4 Without Using ISU, page 29
Prerequisites, page 27
Upgrade Considerations, page 27
Procedure to Upgrade a PRE3 to a PRE4 Using ISU, page 28
For all of the software features supported by your current PRE3 (c10k3-p11-mz) image to function
correctly, they must be supported by the PRE4 image. Check with the Cisco Technical Assistance
Center (TAC) to verify the correct upgrade path before initiating the upgrade.
The upgrade should be performed by a qualified engineer. This person must be familiar with the
Cisco router console interface and be able to perform basic router operations, such as configuration
loading and router reload functions.
Do not perform this upgrade if your current PRE3 software image supports new features not yet
supported by the PRE4 software image. Performing this upgrade will cause these features to fail.
Stateful Switchover (SSO) must be configured and working properly. If you do not have SSO
enabled, see the Stateful Switchover document for further information on how to enable and
configure SSO.
The Cisco IOS software release on the PRE3 must be the same Cisco IOS software release that is
on the PRE4. For information on how to perform full image software upgrades using the In Service
Software Upgrade (ISSU) process, see the
Software Upgrade Process
The SPA interface processors (SIPs) reset during a PRE3 to PRE4 ISU.
If the Cisco IOS software release on the PRE4 is compatible with the software release on the PRE3,
the system operates in Stateful Switchover (SSO) mode. If the images are not compatible, the system
operates in route processor redundancy (RPR) mode.
We recommend that you copy the new Cisco IOS software release for the PRE4 on a separate system,
and not on the system you are upgrading.
Cisco IOS In Service Software Upgrade and Enhanced Fast
publication.
Cisco 10008 Router PRE4 Installation and Configuration Guide
Upgrading a PRE3 to a PRE4
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