CHAPTER 10
Software Maintenance Upgrade
The Software Maintenance Upgrade (SMU) is a package that can be installed on a system to provide a fix or
a security resolution to a released image.
• Restrictions for Software Maintenance Upgrade, on page 195
• Information About Software Maintenance Upgrade, on page 195
• How to Manage Software Maintenance Updates, on page 196
• Configuration Examples for Software Maintenance Upgrade, on page 199
• Additional References for Software Maintenance Upgrade, on page 212
• Feature History for Software Maintenance Upgrade, on page 212
Restrictions for Software Maintenance Upgrade
• Hot patching is not supported on Cisco Catalyst 9200 Series Switches.
• SMU supports cold patching using install mode only.
Information About Software Maintenance Upgrade
SMU Overview
The SMU is a package that can be installed on a system to provide a fix or a security resolution to a released
image. An SMU package is provided on a per release and per component basis.
An SMU provides a significant benefit over classic Cisco IOS software because it allows you to address
network issues quickly while reducing the time and scope of the testing required. The Cisco IOS XE platform
internally validates SMU compatibility and does not allow you to install noncompatible SMUs.
All the SMUs are integrated into the subsequent Cisco IOS XE software maintenance releases. An SMU is
an independent and self-sufficient package and it does not have any prerequisites or dependencies. You can
choose which SMUs to install or uninstall in any order.
SMUs are supported only on Extended Maintenance releases and for the full lifecycle of the underlying
software release.
Perform these basic steps to install an SMU:
System Management Configuration Guide, Cisco IOS XE Gibraltar 16.10.x (Catalyst 9200 Switches)
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