Peering

Question 1

Differences (choice points) between VPC Peering and PrivateLink

Answer 1

PEERING PRIVATE LINK

2-way 1-way
implement w/ route tables one route to an endpoint
no overlapping IPs allows overlapping IPs
cheaper more expensive (NLB)

Question 2

How can I peer VPCs with overlapping IP blocks?

Answer 2

TGW, using different routing tables and segmenting the network

NAT

Question 3

VPC A is peered to B and C, which have overlapping IP address. How do I manage this in the VPC A route table?

Answer 3

To target VPC B, include specific IP addresses in the VPC A route table. (Instance X —–> pcxAtoB). Then route all OTHER traffic to C by specifying the less-specific entire IP range of VPC C.