Upgrading MCT Clusters to SLX-OS 20.1.1 and Later

Use one of the MCT (Multiple Chassis Trunking) upgrade procedures to upgrade MCT cluster nodes with minimal traffic loss.

The format of the SLX-OS 20.1.1 and later startup-config has changed from the earlier releases. You can upgrade MCT clusters and preserve your MCT configuration in one of the following scenarios:

Upgrade MCT Clusters from SLX-OS 18r.2.00b: For this release, you can download a script that preserves your MCT configuration during upgrade.
Upgrade MCT Clusters from the SLX-OS 20.1.1 Controlled Release: The controlled release uses the new format for startup-config, so upgrading poses no risk to your MCT configuration.

Important

MCT configuration is not preserved if you upgrade clusters from any release other than 18r.2.00b or the 20.1.1 controlled release. For such upgrades, you have the following options:

Upgrade your clusters to 18r.2.00b, and then upgrade to 20.1.1 or later using the script that preserves your MCT configuration.
Upgrade to 20.1.1 or later and manually create the MCT startup-config after upgrade.