About Smus - Cisco Nexus 9000 Series Configuration Manual

Performing Software Maintenance Upgrades
This chapter describes how to perform software maintenance upgrades (SMUs) on Cisco NX-OS devices.
This chapter includes the following sections:
•
•
•
•
•
•
•

About SMUs

A software maintenance upgrade (SMU) is a package file that contains fixes for a specific defect. SMUs are
created to respond to immediate issues and do not include new features. Typically, SMUs do not have a large
impact on device operations. SMU versions are synchronized to the package major, minor, and maintenance
versions they upgrade.
The effect of an SMU depends on its type:
• Process restart SMU-Causes a process or group of processes to restart on activation.
• Reload SMU-Causes a parallel reload of supervisors and line cards.
SMUs are not an alternative to maintenance releases. They provide a quick resolution of immediate issues.
All defects fixed by SMUs are integrated into the maintenance releases.
For information on upgrading your device to a new feature or maintenance release, see the Cisco Nexus 9000
Series NX-OS Software Upgrade and Downgrade Guide.
About SMUs, page 217
Prerequisites for SMUs, page 219
Guidelines and Limitations for SMUs, page 219
Performing a Software Maintenance Upgrade for Cisco NX-OS, page 220
Performing a Software Maintenance Upgrade for Guest Shell Bash, page 231
Additional References, page 232
SMU History, page 232
Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x
18
C H A P T E R
217