Load balancer upgrade from Basic to Standard SKU

Question

We have received Microsoft service health regarding the retirement of Basic SKU load balancer, and as per Microsoft suggestion we need to perform the migration of Basic to Standard SKU in load balancer.

To perform this activity using the PowerShell script provided in Microsoft documentation, we have few queries. We have Virtual machines added in the backend pool of the Basic load balancers.

Please help with the solutions:

• What is the duration / downtime required for the migration as we need to take downtime approval from client accordingly?
• In case of any issue occurred during migration, what are the rollback plans which we can perform?
• What are the prerequisites which we can take care off before performing the migration?
• What are the post migration actions for us to be taken?
• What will be the impact of the migration on the applications?

Answer 1

Hi Chakraborty, Shubham,

Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.

What is the duration / downtime required for the migration as we need to take downtime approval from client accordingly?

The upgrade normally takes a few minutes for the script to finish. The following factors may lead to longer upgrade times:

• Complexity of your load balancer configuration
• Number of backend pool members
• Instance count of associated Virtual Machine Scale Sets or Virtual Machines

Keep the downtime in mind and plan for failover if necessary.

In case of any issue occurred during migration, what are the rollback plans which we can perform?

Here is the few issue What happens if my upgrade fails mid-migration?

• What are the prerequisites which we can take care off before performing the migration?
• What are the post migration actions for us to be taken?

Refer this link: Pre- and Post-migration Steps

What will be the impact of the migration on the applications?

Yes, because the Basic Load Balancer needs to be removed before the new Standard Load Balancer can be created, there will be downtime to your application.

Refer this link for details:
Upgrade from Basic to Standard with PowerShell - Azure Load Balancer | Microsoft Learn

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