Cisco Asr 9000 Series Router Nv Edge System Scripted Rack-By-Rack Upgrade - Cisco ASR 9000 Series System Configuration Manual

Configuring the nV Edge System on the Cisco ASR 9000 Series Router
Cisco ASR 9000 Series Router nV Edge System Scripted
Rack-by-Rack Upgrade
This section describes how to perform a scripted rack-by-rack upgrade or activate a reload Software Maintenance
Upgrade (SMU) on the Cisco ASR 9000 Series Aggregation Services Router nV Edge System. A rack-by-rack
upgrade can be used to install a new software release or a software patch (SMU) on each rack one at a time.
Packet loss is minimized in the software upgrade for network topologies that incorporate cabling redundancy
to each rack in the Cisco ASR 9000 Series nV Edge System.
There are three methods to upgrade or activate a SMU on a Cisco ASR 9000 Series nV Edge system:
• A standard software upgrade or SMU activation with the install activate command. Both racks should
• A standard software upgrade or SMU activation of the Cisco ASR 9000 Series nV Edge System requires
• The scripted rack-by-rack method.
The third method listed above is explained.
Note Do not perform the rack-by-rack upgrade without the script.
In-Service Software Upgrade (ISSU) is not supported on cluster even for SMU activation.
Note
Note If you are performing a rack-by-rack upgrade from versions lower than Cisco IOS XR Software Release
5.1.3 (or 5.1.2 with SMU installed), it can cause loss of configuration for Rack 0 interfaces. Rack-by-rack
upgrade will cause traffic loss on the rack with missing configuration. The remaining configured rack will
continue carrying traffic. If a rack failover occurs before the configuration is restored, the system will
experience a total loss of traffic as no redundant interfaces are available.
As a preventative measure, the SMU for this issue should be applied prior to a major release upgrade and
upgrade to a release containing this fix. This issue is resolved for Cisco IOS XR Software Release 5.1.3
and 5.2.2.
be powered on.
the backup Designated Shelf Controller (DSC) rack to be powered down, the software on the primary-DSC
rack (system reload) to be upgraded, and the backup-DSC rack to be powered back up in order to
synchronize.
Cisco ASR 9000 Series Aggregation Services Router nV System Configuration Guide, Release 5.3.x

Cisco ASR 9000 Series Router nV Edge System Scripted Rack-by-Rack Upgrade

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