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---
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title: "TGW Peering"
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type: concept
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tags: [AWS, Networking, Transit Gateway, Multi-Region]
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sources: [ctp-topic-18-wide-area-networking-in-aws-cloud]
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last_updated: 2026-05-07
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---
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## TGW Peering
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TGW Peering(Transit Gateway Peering)是在不同区域(Region)或同一区域(Region)内的两个 AWS Transit Gateway 之间建立的点对点连接,用于跨网段流量传输和跨区域 VPC 互联。
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## Definition
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- **连接对象**: 两个 Transit Gateway(可跨区域或同区域)
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- **流量类型**: VPC-to-VPC、Transit Gateway-to-On-prem、跨区域互联
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- **路由控制**: 通过路由表(Transit Gateway Route Table)配置,支持静态路由和关联/传播机制
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## In CTP Global Architecture
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在 [[ctp-topic-18-wide-area-networking-in-aws-cloud]] 中描述的架构:
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- **连接模式**: 所有 Landing Zones 通过 TGW Peering 接入各自地理区域的区域 Hub Transit Gateway
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- **跨区域连接**: 各区域 Hub Transit Gateway 之间通过 Full Mesh(全网状)TGW Peering 连接,确保全球流量可达
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- **地理分区**: APJ/EMEA/AMS 三大区域,每个区域有独立的 Hub Transit Gateway(如 EMEA 伦敦、AMS 俄勒冈)
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## Key Properties
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| 属性 | 值 |
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|------|-----|
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| 连接类型 | 点对点(Peer-to-Peer) |
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| 跨区域支持 | ✅ 支持跨 Region Peering |
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| 带宽限制 | 受限于 AWS 全球网络基础设施 |
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| 路由方式 | Transit Gateway Route Table(可关联多个路由表) |
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| 与 TGW Peering 对比 | 跨区域连接 vs 区域内连接 |
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## Relationship to Related Concepts
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| 概念 | 关系 |
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|------|------|
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| [[AWS-Transit-Gateway-TGW]] | TGW Peering 的连接主体 |
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| [[Hub-and-Spoke]] | Landing Zone 作为 Spoke 通过 TGW Peering 接入 Hub |
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| [[Static-Routing]] | 当前 TGW Peering 间路由依赖静态前缀列表 |
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## Connections
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- [[ctp-topic-18-wide-area-networking-in-aws-cloud]] ← 连接机制 ← [[TGW-Peering]]
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- [[AWS-Transit-Gateway-TGW]] ← 连接对象 ← [[TGW-Peering]]
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- [[Hub-and-Spoke]] ← 实现方式 ← [[TGW-Peering]]
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## Sources
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- [[ctp-topic-18-wide-area-networking-in-aws-cloud]]
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