A company has AWS accounts in an organization in AWS Organizations. The company has implemented Amazon VPC IP Address Manager (IPAM) in its networking AWS account. The company is using AWS Resource Access Manager (AWS RAM) to share IPAM pools with other AWS accounts. The company has created a top-level pool with a CIDR block of 10.0.0.0/8. For each AWS account, the company has created an IPAM pool within the top-level pool. A network engineer needs to implement a solution to ensure that users in each AWS account cannot create new VPCs. The solution also must prevent users from associating a CIDR block with existing VPCs unless the CIDR block is from the IPAM pool for that account. Which solution will meet these requirements?
Select one answer.
Marked answer: B
Community Discussion
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
Chose B3
Option B meets all of the requirements with least operational overhead: It creates a new SCP in Organizations that denies the CreateVpc and AssociateVpcCidrBlock Amazon EC2 actions if the Ipv4IpamPoolId context key value is not the ID of an IPAM pool. The SCP will prevent users from creating VPCs without the correct CIDR block. It prevents users from associating a CIDR block with existing VPCs unless the CIDR block is from the IPAM pool for that account.
Chose B1
AWS Organization Service control policy (SCP) to enforce CIDR allocation through IPAM while creating VPCs • Enforce using specific IPAM pools • Enforce specific IPAM pools to specific OUs
1
B - This meets the requirements, although option A would as well. Only issue with option A, is the deletion of VPC's. Doesn't mention removing or reclaiming existing IP's.
