GCP Network Engineer case studies

GCP Network Engineer · Put your knowledge to work in context.

The Professional Cloud Network Engineer is Google Cloud's professional-level certification for engineers who design, implement, and manage Google Cloud network infrastructure. According to the certification page, the role covers network architectures built for high availability, scalability, resiliency, and security, and the individual is expected to be skilled in configuring and managing Virtual Private Cloud (VPC), routing, load balancing, Cloud NAT, and Cloud DNS. The GCP Network Engineer case studies are 5 cases and about 5,192 words.

Consolidating 38 Projects: Shared VPC Topology and a Three-Year IP Plan

Northwind Analytics is consolidating 38 Google Cloud projects under one organization. On-premises uses 10.0.0.0/8 and connects over Dedicated Interconnect in Q3; a company acquired last year uses 172.20.0.0/14 and must stay reachable in both directions.

1,010 words, about 5 min 2

Unhealthy Backends, a Silent NVA Route, and a Subnet That Cannot Grow

Halcyon Retail runs a three-tier application in us-central1 on three subnets of one VPC: web 10.0.0.0/24, app 10.0.1.0/24, and db 10.0.2.0/24. Ingress rules were added by hand over 18 months: 140 rules, most with source 10.0.0.0/8, and targets applied as network tags inconsistently.

1,055 words, about 5 min 3

Cloud NAT Port Starvation on a Private GKE Cluster

Meridian Logistics runs a private GKE Standard cluster in europe-west3 with private nodes that have no external IP addresses. Nodes pull images from an external registry, and up to 400 short-lived pods call a partner API that allowlists callers by source IP.

1,060 words, about 5 min 4

Two Interconnects, One Path: Asymmetric BGP and a Jumbo-Frame Backup

Vantage Health runs two 10-Gbps Dedicated Interconnect connections, one terminating in Amsterdam and one in Frankfurt, to reach on-premises ranges 10.20.0.0/16 and 10.21.0.0/16. The on-premises CE routers use ASN 65001; Cloud Router uses 16550.

1,180 words, about 6 min 5

Cloud Armor Under DDoS and a BigQuery Exfiltration Path

Fintrail runs a PCI-scoped payment platform behind a global external Application Load Balancer fronting managed instance groups in us-central1. Cloud Armor applies one preconfigured WAF rule at default sensitivity, plus a global allowlist of 200 partner /32 addresses placed at priority 2147483647.

887 words, about 4 min