What is the recommended sequence to perform SD-WAN software upgrades?
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Correct answer: vManage, vBond, vSmart, WAN Edge.
Why this is the answer
The recommended sequence for SD-WAN software upgrades is vManage, vBond, vSmart, then WAN Edge devices. This order ensures that the management plane (vManage) is upgraded first to support new features and manage the upgrade process. Next, the orchestration plane (vBond) is upgraded, followed by the control plane (vSmart). Upgrading vBond and vSmart after vManage ensures they can communicate effectively with the updated vManage and maintain network stability. Finally, the data plane (WAN Edge devices) are upgraded. Upgrading WAN Edge devices last minimizes disruption to data traffic, as they rely on the control plane for routing information. Upgrading vSmart before vBond or vManage would lead to control plane instability. Upgrading WAN Edge devices before vSmart would mean they are running a newer version than the control plane, potentially causing communication issues.
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