ANS-C01 Exam - Question 32

Question

A network engineer needs to set up an Amazon EC2 Auto Scaling group to run a Linux-based network appliance in a highly available architecture. The network engineer is configuring the new launch template for the Auto Scaling group.

In addition to the primary network interface the network appliance requires a second network interface that will be used exclusively by the application to exchange traffic with hosts over the internet. The company has set up a Bring Your Own IP (BYOIP) pool that includes an Elastic IP address that should be used as the public IP address for the second network interface.

How can the network engineer implement the required architecture?

Examice · Accepted Answer

To set up an Amazon EC2 Auto Scaling group that can handle a second network interface meant for public traffic, the user data option can be leveraged. This allows the network engineer to run a cloud-init script during instance initialization. The script can be used to configure the secondary network interface and allocate an Elastic IP address from the BYOIP pool. This approach ensures the secondary interface is properly configured and associated with the correct public IP, satisfying the requirement for high availability and specific network configuration.

rhinozD · Answer

A is incorrect.
EC2 Auto Scaling supports attaching a second elastic network interface automatically when Auto Scaling spins up a new instance. However, both elastic network interfaces attached to the instance are in the same subnet.
So you can:
1. Combine Lambda + Lifecycle hook + eventbridge to assign the second elastic network interface
2. or use cloud-init.
-> D is correct.

zaazanuna · Answer

D - correct.

CertNerd1234 · Answer

Reason why not option A: it is not possible to choose BYOIP when creating launch template

vikasj1in · Answer

During the creation of the Auto Scaling group, you can select the subnets for the primary network interface.

Using user data, you can run a cloud-init script to allocate and configure the second network interface during the instance launch process.

The cloud-init script can also handle the association of an Elastic IP address from the BYOIP pool to the second network interface.

This approach ensures that each instance launched by the Auto Scaling group has the necessary network configuration, including the second network interface with a public IP address from the BYOIP pool.

helloworldabc · Answer

DDDDDDDD

YEBINNNNN · Answer

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Tofu13 · Answer

RhinozD answer with links
https://aws.amazon.com/about-aws/whats-new/2020/11/amazon-ec2-auto-scaling-supports-attaching-multiple-network-interfaces-at-launch/

https://repost.aws/knowledge-center/ec2-auto-scaling-multiple-network-interfaces

flowers00 · Answer

A - correct.

study_aws1 · Answer

A - correct

navi7 · Answer

why is A incorrect?

ohcan · Answer

I think both A and D are correct, but A is easier and more efficient

dman · Answer

A, not D because ASG with multiple network interfaces, it cannot auto assign Public IPV4 address.

tycho · Answer

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/best-practices-for-configuring-network-interfaces.html

i4papa · Answer

A is incorrect

marfee · Answer

I think that it's correcty answer is D.

Marfee400704 · Answer

I think that it' correct answer is D accoring to SPOTO products.

ANS-C01 Exam - Question 32

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