An 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 incompatible SMUs.
All 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:
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Add the SMU to the filesystem.
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Activate the SMU on the system.
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Commit the SMU changes so that it is persistent across reloads.