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Difficulty: MediumConfigure Azure Load Balancer

An administrator is configuring a new public Azure Load Balancer named `LB1` using the Standard SKU. The administrator plans to associate an existing public IP address named `PubIP1` with the frontend IP configuration of `LB1`. `PubIP1` is currently configured with the Basic SKU. Which of the following describes the outcome when the administrator attempts to save this configuration?

  1. The configuration fails because a Standard SKU load balancer can only be associated with a Standard SKU public IP address.Answer
  2. B
    The configuration succeeds, but Azure automatically upgrades the public IP address to the Standard SKU.
  3. C
    The configuration succeeds, but the load balancer operates in a backward-compatibility mode with Basic SKU features.
  4. D
    The configuration fails because Basic SKU public IP addresses are only supported for internal load balancers.

Answer

The configuration fails because a Standard SKU load balancer can only be associated with a Standard SKU public IP address.
The configuration fails because Azure enforces strict SKU consistency between the Load Balancer and its frontend IP configuration. A Standard SKU Load Balancer must use a Standard SKU Public IP address, and a Basic SKU Load Balancer must use a Basic SKU Public IP address.

Step-by-Step Solution

1
Identify the SKU of the Load Balancer and the SKU of the Public IP address being associated.
The Load Balancer is Standard SKU, and the Public IP address is Basic SKU.
This establishes the parameters for the SKU compatibility check.
2
Apply Azure's SKU matching rule for Load Balancers and public IP configurations.
Standard SKU Load Balancer requires Standard SKU Public IP. Basic SKU Load Balancer requires Basic SKU Public IP.
Azure enforces strict SKU matching between the Load Balancer resource and its frontend IP configurations.
3
Determine the deployment outcome based on the SKU mismatch.
The deployment or configuration update fails due to a SKU validation error.
Since the SKUs do not match, the configuration cannot be saved.

Key Concept

Azure Load Balancer and Public IP SKU compatibility requirements
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Topics

Configure Azure Load Balancer

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