Setting Up AWS Direct Connect for Mixed IP Address Access to Amazon S3

Correct Answer - D.

For Public VIF DX connection, the Client needs to specify the Public IPv4 address pool which they own, while for the IPv6 connection, peer IP addresses are automatically assigned by Amazon from its IPv6 pool.

Option A is incorrect as a custom IPv6 pool cannot be assigned for AWS DX Connection.

Option B is incorrect as a private IPv4 pool cannot be assigned for Public VIF AWS DX Connection.

Option C is incorrect as IPv4 pools are not automatically generated for Public VIF by AWS & need to specify during connection creation.

For more information on creating a Public VIF with IPv4 & IPv6 connection, refer to the following URL.

The client is facing congestion and performance issues with their current setup of using AWS VPN to store all documents in Amazon S3 bucket. To efficiently access the S3 bucket without any change in user-end configuration, they plan to set up an AWS Direct Connect link with dual-stack Public VIF.

Dual-stack Public VIF allows the client to use both IPv4 and IPv6 addresses to access the S3 bucket. Therefore, the client needs to finalize the IP address ranges for both IPv4 and IPv6 connections before setting up the Public VIF.

Let's go through each answer option and understand its implications:

A. Use custom Public IP address pool for both IPv4 & IPv6 connections. If the client uses a custom Public IP address pool for both IPv4 and IPv6 connections, they will have to ensure that the IP address range they use is not already in use by any other organization. The IP addresses used by the client will be publicly visible, and they will be responsible for managing and maintaining their IP address range. Therefore, this option requires more effort and management from the client's side.

B. Use Private IPv4 pool for IPv4 connection while for IPv6 connection, use custom IPv6 pool from IPv6 range owned by the client. If the client uses a Private IPv4 pool for IPv4 connection, they will not have to worry about IP address conflicts with other organizations. However, the client will have to use a custom IPv6 pool from the IPv6 range owned by them. They will have to ensure that the IPv6 pool they use is not already in use by any other organization. Additionally, this option requires more effort and management from the client's side.

C. For Public IPv4 & IPv6 connection, an IP address is automatically assigned by Amazon. This option seems the easiest, as Amazon automatically assigns Public IPv4 and IPv6 addresses for the client's connection. However, it is essential to keep in mind that the client will not have control over the IP addresses assigned to them by Amazon. Therefore, this option may not be suitable if the client needs to keep track of their IP addresses for compliance or auditing purposes.

D. Use Public IPv4 pool owned by the client for IPv4 connection while for IPv6 connection, peer IP addresses are automatically assigned by Amazon. This option allows the client to use their Public IPv4 pool for IPv4 connection, which gives them control over their IP addresses. However, for IPv6 connection, peer IP addresses are automatically assigned by Amazon. Therefore, the client will not have control over the IPv6 addresses assigned to them.

In conclusion, the best answer option for the client's requirement is B - Use Private IPv4 pool for IPv4 connection while for IPv6 connection, use custom IPv6 pool from IPv6 range owned by the client. It provides the client control over their IPv4 and IPv6 addresses and avoids any IP address conflicts with other organizations. However, this option requires more effort and management from the client's side.