Connecting networks to Google VPC.md

Google Cloud offers multiple ways to connect your **VPC network** with **on-premises networks** or **other cloud providers**. Here’s a breakdown of the six main options: ### Cloud VPN Use a VPN connection over the internet and use a cloud VPN to create a 'tunnel' connection **🔹 Best for:** Secure c...

Google Cloud offers multiple ways to connect your **VPC network** with **on-premises networks** or **other cloud providers**. Here’s a breakdown of the six main options: ### Cloud VPN Use a VPN connection over the internet and use a cloud VPN to create a 'tunnel' connection **🔹 Best for:** Secure connection over the public internet **🔹 How it works:** Uses **IPsec encryption** to create a secure **tunnel** over the internet. Connects **on-premises** or **other cloud networks** to Google Cloud VPC. Can be **static** or **dynamic** using **Cloud Router** (which exchanges routes dynamically via BGP). 📌 **Pros:** Low-cost, easy to set up 📌 **Cons:** Depends on **internet reliability** --------- ### Direct Peering **🔹 Best for:** Low-latency, direct network exchange with Google **🔹 How it works:** Your on-premises **router** connects to [[Google’s Point of Presence (PoP)]] in a public data center. Enables **direct traffic exchange** between your network and Google’s network. 📌 **Pros:** Better performance than a VPN, no Google Cloud interconnect required 📌 **Cons:** **No SLA (Service Level Agreement)**, dependent on public internet -------- ### Carrier Peering **🔹 Best for:** On-premises access to Google services through an ISP **🔹 How it works:** Your network connects to Google Cloud via an **ISP or third-party carrier**. Provides access to **Google Cloud services** (like Google Workspace) over a **private connection**. 📌 **Pros:** No need for a physical interconnect, reliable access to Google Cloud 📌 **Cons:** **No SLA**, traffic still traverses the provider’s network ------ ### Dedicated Interconnect **🔹 Best for:** High-performance, private, dedicated connection to Google Cloud **🔹 How it works:** Establishes a **private fiber-optic connection** between **Google Cloud and your data center**. Requires **colocation at a Google Cloud Interconnect facility**. Supports speeds from **10 Gbps to 100 Gbps**. **Meets Google’s SLA of up to 99.99% uptime** if redundancy is configured. 📌 **Pros:** Highest reliability, lowest latency, **covered by SLA** 📌 **Cons:** Requires **physical setup**, expensive ----- ### Partner Interconnect **🔹 Best for:** Organizations that can’t physically connect to a Google PoP **🔹 How it works:** A **third-party service provider** establishes the interconnect for you. Ideal for cases where **Dedicated Interconnect** isn’t feasible due to location. Supports different bandwidth options (lower than 10 Gbps if needed). **Can be covered by an SLA if it meets Google’s topology requirements**. 📌 **Pros:** **Flexible bandwidth**, **lower cost** than Dedicated Interconnect 📌 **Cons:** **Google is not responsible** for third-party provider reliability ----- ### Cross-Cloud Interconnect **🔹 Best for:** Direct, high-speed connectivity between Google Cloud and another cloud provider **🔹 How it works:** Google provisions a **dedicated physical connection** to another cloud provider. Supports bandwidths of **10 Gbps or 100 Gbps**. Enables **multi-cloud networking** with **low latency and high security**. 📌 **Pros:** **Reliable inter-cloud connectivity**, avoids public internet 📌 **Cons:** Limited to **supported cloud providers** ✅ **For Quick, Low-Cost Setup →** **Cloud VPN** ✅ **For Low-Latency Public Traffic →** **Direct Peering** ✅ **For Connecting via an ISP →** **Carrier Peering** ✅ **For Highest Reliability & SLA →** **Dedicated Interconnect** ✅ **For Flexible Private Interconnect →** **Partner Interconnect** ✅ **For Multi-Cloud Networking →** **Cross-Cloud Interconnect** #cloud #gcp