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Dell SmartFabric OS10 Installation, Upgrade, and Downgrade Guide

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VLT upgrade with minimal loss for upgrades from 10.5.0.5 or earlier to 10.5.1.9 or later releases

NOTE:The default X.509v3 certificates used for VLT convergence expire on July 27, 2021. See Dell SmartFabric OS10 certificate expiration and recommended action for additional information before you start the VLT upgrade procedure.
NOTE: This procedure is applicable only when upgrading to 10.5.1.9 or future releases from 10.5.0.5 or earlier OS10 releases. This VLT upgrade procedure is not applicable when upgrading to 10.5.2.6 or future releases from 10.5.0.6 or later releases. You can directly upgrade VLT nodes from 10.5.0.6 or later release to 10.5.2.6 or future release using the regular VLT upgrade procedure.
  1. Upgrade one VLT peer (VLT-Peer1) running a 10.5.0.x or 10.4.3.x release image to 10.5.0.9 or later, using the standard image upgrade procedure. Reboot the switch with the newly installed image. Wait for VLT-Peer1 to forward traffic after the delay restore timer stops.
  2. Upgrade the other VLT peer (VLT-Peer2), running a 10.5.0.x or 10.4.3.x release image to 10.5.0.9 or later, using the standard image upgrade procedure. Reboot the switch with the newly installed image. Wait for VLT-Peer2 to forward traffic after the delay restore timer stops.
  3. Upgrade one VLT peer (VLT-Peer1) to 10.5.1.9 or later/10.5.2.6 or later using the standard image upgrade procedure. Reboot the switch with the newly installed image. Wait for VLT-Peer1 to forward traffic after the delay restore timer stops.
  4. Upgrade the other VLT peer (VLT-Peer2) to 10.5.1.9 or later/10.5.2.6 or later using the standard image upgrade procedure. Reboot the switch with the newly installed image.

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