The article details the design and implementation of VPC NAT gateway v2.0, explaining how new control‑plane fields, rule‑generation changes, and forwarding‑plane enhancements allow a single configuration to connect entire source VPCs to target VPCs, reducing complexity and operational cost.
Using Amazon Global Accelerator, NLB, and Direct Connect can cause asymmetric routing that blocks UDP traffic, but adding a NAT gateway and adjusting route tables creates symmetric paths, restores bidirectional UDP communication, and scales with multi‑IP support, albeit with added cost.
This article explains how VPC enables component layering and isolation, covering four typical scenarios—enabling internet access for subnets, separating internal and external resources, inter‑connecting multiple cloud VPCs, and linking on‑premises networks with cloud VPCs—along with step‑by‑step implementation guidance.
The 2017 Double‑11 festival shattered records with 168.2 billion yuan in sales, and Alibaba Cloud’s VPC, load‑balancing SLB, NAT gateway, and high‑speed hybrid‑cloud network together ensured the massive traffic and payment spikes ran smoothly for millions of shoppers.
