Subnet modes (auto, custom) in GCP - Mini Project: Build & Apply

Subnet Modes in Google Cloud Platform

📖 Scenario: You are setting up a Virtual Private Cloud (VPC) network in Google Cloud Platform (GCP) for a small company. You need to understand how subnet modes work to create the network properly.Subnet modes control how subnets are created in a VPC. There are two main modes: auto and custom. Auto mode automatically creates subnets in all regions, while custom mode lets you create subnets manually.

🎯 Goal: Create a VPC network in GCP with auto subnet mode, then create another VPC network with custom subnet mode and add a subnet manually.

📋 What You'll Learn

Create a VPC network named auto-network with auto subnet mode.

Create a VPC network named custom-network with custom subnet mode.

Create a subnet named custom-subnet in custom-network with the IP range 10.0.1.0/24 in the us-central1 region.

💡 Why This Matters

🌍 Real World

Setting up VPC networks with correct subnet modes is essential for organizing cloud resources and controlling network traffic in real projects.

💼 Career

Cloud engineers and network administrators often configure VPCs and subnets to meet security and architecture requirements.

1

Create a VPC network with auto subnet mode

Write the gcloud command to create a VPC network called auto-network with auto subnet mode.

GCP

# Your gcloud command here to create auto-network with auto subnet mode

Need a hint?

Use gcloud compute networks create with the --subnet-mode=auto flag.

2

Create a VPC network with custom subnet mode

Write the gcloud command to create a VPC network called custom-network with custom subnet mode.

GCP

gcloud compute networks create auto-network --subnet-mode=auto
# Your gcloud command here to create custom-network with custom subnet mode

Need a hint?

Use gcloud compute networks create with the --subnet-mode=custom flag.

3

Create a subnet in the custom network

Write the gcloud command to create a subnet named custom-subnet in the custom-network network with IP range 10.0.1.0/24 in the us-central1 region.

GCP

gcloud compute networks create auto-network --subnet-mode=auto
gcloud compute networks create custom-network --subnet-mode=custom
# Your gcloud command here to create custom-subnet in custom-network

Need a hint?

Use gcloud compute networks subnets create with the --network, --region, and --range flags.

4

Verify the networks and subnets

Write the gcloud commands to list all networks and list all subnets in the custom-network network.

GCP

gcloud compute networks create auto-network --subnet-mode=auto
gcloud compute networks create custom-network --subnet-mode=custom
gcloud compute networks subnets create custom-subnet --network=custom-network --region=us-central1 --range=10.0.1.0/24
# Your gcloud commands here to list networks and subnets

Need a hint?

Use gcloud compute networks list to see all networks and gcloud compute networks subnets list --network=custom-network to see subnets in the custom network.