16 ‐ DRG Vs VPN - SanjeevOCI/Study GitHub Wiki
Dynamic Routing Gateway (DRG) in OCI
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Definition:
The Dynamic Routing Gateway (DRG) in Oracle Cloud Infrastructure (OCI) is a virtual router that provides a gateway for private network connectivity between your VCN (Virtual Cloud Network) and external networks, such as on-premises data centers or other cloud providers. -
Use Cases:
- Connect on-premises networks to OCI using IPSec VPN or FastConnect.
- Enable VCN-to-VCN communication across regions using Remote Peering.
- Act as a central hub for hybrid and multi-cloud architectures.
Difference Between DRG and VPN
| Aspect | Dynamic Routing Gateway (DRG) | VPN |
|---|---|---|
| Purpose | Acts as a central hub for hybrid and multi-cloud connectivity. | Provides secure, encrypted communication between two networks. |
| Connectivity Options | Supports FastConnect, IPSec VPN, and Remote Peering. | Only supports IPSec VPN for encrypted communication. |
| Performance | High performance with FastConnect (dedicated private link). | Limited by internet bandwidth and latency. |
| Use Case | Used for hybrid cloud, multi-cloud, and inter-VCN peering. | Used for secure communication over the public internet. |
| Scalability | Can handle multiple connections (e.g., multiple VPNs, FastConnect). | Typically used for smaller-scale, point-to-point connections. |
DRG Equivalents in AWS, Azure, and GCP
| Cloud Provider | Equivalent to DRG | Use Cases | Comparison to VPN |
|---|---|---|---|
| AWS | Transit Gateway (TGW) | - Connect multiple VPCs and on-premises networks. | - Supports Direct Connect (private link) and VPN. |
| - Acts as a central hub for hybrid and multi-cloud architectures. | - More scalable and performant than standalone VPN connections. | ||
| Azure | Azure Virtual WAN | - Connect multiple VNets, on-premises networks, and other clouds. | - Supports ExpressRoute (private link) and VPN Gateway. |
| - Centralized routing and security for hybrid and multi-cloud setups. | - Provides better scalability and centralized management compared to VPN Gateway. | ||
| GCP | Cloud Router | - Connect multiple VPCs and on-premises networks. | - Supports Dedicated Interconnect (private link) and IPSec VPN. |
| - Enables dynamic routing using BGP for hybrid and multi-cloud setups. | - More flexible and scalable than standalone VPN connections. |
Key Differences Between DRG and VPN in AWS, Azure, and GCP
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Centralized Connectivity:
- DRG (and its equivalents like AWS Transit Gateway, Azure Virtual WAN, and GCP Cloud Router) acts as a central hub for connecting multiple networks, while VPN is typically point-to-point.
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Performance:
- DRG and its equivalents support dedicated private links (e.g., OCI FastConnect, AWS Direct Connect, Azure ExpressRoute, GCP Interconnect), which offer higher performance and lower latency compared to VPN.
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Scalability:
- DRG and its equivalents are designed for large-scale hybrid and multi-cloud architectures, while VPN is better suited for smaller-scale, secure connections over the public internet.
Summary
- Dynamic Routing Gateway (DRG) in OCI is a versatile gateway for hybrid and multi-cloud connectivity, supporting FastConnect, VPN, and Remote Peering.
- Equivalents:
- AWS: Transit Gateway
- Azure: Virtual WAN
- GCP: Cloud Router
- Compared to VPN: DRG and its equivalents provide centralized, scalable, and high-performance connectivity, while VPN is limited to point-to-point encrypted communication over the internet.