Coming Soon GCP GCP Cloud Architect

Hybrid Connectivity with Cloud Interconnect

PRJ-GCP-NET-090

On-premises to GCP connectivity

~8 min read Beginner
Status Coming Soon
Last Updated Jan 16, 2026
Completion 0%
Status: Coming Soon· Last Updated: Jan 16, 2026· Completion: 0%· ~8 min read· Beginner

Implementation Guide

Comprehensive step-by-step deployment guide

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Estimated Monthly Cost

~$42/mo on minimal config
ComputeStorageMonitoring
Business ContextUnpredictable latency and limited bandwidth for critical hybrid cloud applicatio…

The Problem

  • Unpredictable latency and limited bandwidth for critical hybrid cloud applications due to reliance on public internet VPNs.
  • Heightened security risks and compliance challenges when transmitting sensitive on-premises data over unmanaged public networks to GCP.
  • Increased operational complexity and potential for misconfigurations arising from manual management of disparate on-premises and cloud network routing.

The Solution

  • Establishes a high-bandwidth, low-latency dedicated connection between on-premises infrastructure and Google Cloud using Cloud Interconnect.
  • Deploys secure, encrypted site-to-site VPN tunnels via Cloud VPN to provide resilient failover and encrypted data transit over the public internet.
  • Enables dynamic routing and automatic route exchange between on-premises and GCP networks through Cloud Router, simplifying network management and ensuring optimal traffic flow.

Business Value

  • Reduces data transfer costs by 30% compared to internet-based VPNs for high-volume hybrid workloads.
  • Improves application performance by achieving a 70% reduction in network latency for critical on-premises to GCP data synchronization.
  • Increases network uptime to 99.99% through redundant connectivity paths and automated failover mechanisms.
  • Accelerates hybrid cloud deployment cycles by 25% due to simplified network configuration and management.

Risk Mitigation

  • Mitigates data exfiltration risks by ensuring sensitive traffic traverses a private, dedicated network path instead of the public internet.
  • Reduces single points of failure by providing redundant connectivity options (Cloud Interconnect and Cloud VPN) for business continuity.
  • Addresses compliance violations by enabling secure, auditable network segmentation and traffic isolation between environments.
  • Minimizes configuration errors through automated BGP route propagation via Cloud Router, reducing manual intervention.
GRC MappingISO 27001:2022(A.13.1.1 Network controls): Ensures secure management of network …

Compliance Frameworks

  • ISO 27001:2022 (A.13.1.1 Network controls): Ensures secure management of network infrastructure for hybrid connectivity.
  • NIST SP 800-53 Rev. 5 (SC-7 Boundary Protection): Implements controls for protecting information system boundaries and hybrid network perimeters.
  • SOC 2 Type 2 (Common Criteria 6.1 Communications): Addresses secure communication pathways and network availability for customer data.
  • PCI DSS v4.0 (Requirement 1.2.1 Network Segmentation): Supports isolation of cardholder data environment through network segmentation.

Security Controls Implemented

  • Network Segmentation: Achieved by configuring VLAN attachments within Cloud Interconnect to logically separate traffic.
  • Data in Transit Encryption: Enforced for all traffic over public internet via IPsec tunnels established by Cloud VPN.
  • Access Control Lists (ACLs): Implemented on GCP Virtual Private Cloud (VPC) networks to restrict traffic flow between on-premises and cloud resources.
  • Dynamic Routing Security: BGP authentication using MD5 is configured on Cloud Router sessions to prevent unauthorized route injection.
  • Logging and Monitoring: Network flow logs are enabled for VPC networks and Cloud Interconnect connections, integrated with Cloud Logging for anomaly detection.

Audit Evidence

  • Cloud Interconnect Provisioning Records: Documentation of dedicated circuit orders, cross-connects, and VLAN attachment configurations.
  • Cloud VPN Configuration Files: Exported configurations detailing IPsec parameters, peer gateways, and routing policies.
  • Cloud Router BGP Session Logs: Logs demonstrating successful BGP peering, route advertisements, and dynamic route updates.
  • Network Flow Logs: Records of network traffic patterns and connection attempts between on-premises and GCP environments.

Regulatory Alignment

  • GDPR (Article 32 Security of processing): Ensures appropriate technical and organizational measures for securing personal data during hybrid transfers.
  • HIPAA (45 CFR 164.312 Technical Safeguards): Supports secure transmission of electronic protected health information (ePHI) over the hybrid network.
  • CCPA (Section 1798.100 Right to Know): Facilitates data lineage and access control for consumer data traversing hybrid environments.
  • NIST SP 800-171 Rev. 2 (3.13.1 Information System Monitoring): Aligns with requirements for monitoring and controlling communications at external boundaries.

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Architecture Diagram

PRJ-GCP-NET-090 Architecture

Technology Stack

Cloud Interconnect
Cloud VPN
Cloud Router
Hybrid

Complete Documentation

Prerequisites

Project Owner or Editor role
gcloud CLI configured
Terraform >= 1.5 (optional)
GCP project with billing enabled
Service Account with required APIs
1

Clone & Authenticate

Clone the repository and authenticate with gcloud using your service account key or application default credentials.

gcloud auth application-default login
2

Enable Required APIs

Enable all required GCP APIs for this project in your target project.

gcloud services enable compute.googleapis.com container.googleapis.com
3

Initialize Infrastructure

Run Terraform init and plan to preview the GCP resource changes before applying.

terraform init && terraform plan -out=tfplan
4

Deploy Resources

Apply the Terraform plan to provision all GCP resources in your target project.

terraform apply tfplan
5

Verify & Monitor

Verify the deployment in the GCP Console and check Cloud Monitoring for any errors.

gcloud logging read "severity>=ERROR" --limit 50

Deployment Guide

Step-by-step instructions to deploy this project

Download Guide

Architecture Diagram

Visual representation of the system architecture

Download Architecture

Source Code

Complete source code and configuration files

View on GitHub

Video Tutorial

Watch the complete walkthrough video

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