AWS Certified Solutions Architect - Associate (SAA-C02)

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VPC Peering – Hub and Spoke

The lecture states at a few different points that VPC Peering is a hub-and-spoke model. I didn’t understand how this could be the case given that transitive peering isn’t possible. 

Consider the following topology:

VPC_A --- VPC_HUB --- VPC_B

A hub-and-spoke model would imply that traffic between the spokes flows via the hub. So if VPC A has to talk to VPC B, traffic would flow via the Hub VPC. However transitive peering isn’t supported, which means VPC A will need to have its own independent peering relationship with VPC B.

That doesn’t sound like a hub-and-spoke, rather more like point-to-point connectivity.

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