You have configured a Compute Engine virtual machine instance as a NAT gateway. You execute the following command: gcloud compute routes create no-ip-internet-route \ --network custom-network1 \…

Question

Options

• Asudo sysctl -w net.ipv4.ip_forward=1
• Bgcloud compute instances add-tags [existing-instance] --tags no-ip
• Cgcloud builds submit --config=cloudbuild.waml --substitutions=TAG_NAME=no-ip
• Dgcloud compute instances create example-instance --network custom-network1 \ --subnet subnet-

• A
  12% (4)
• B
  79% (27)
• C
  6% (2)
• D
  3% (1)

Explanation

In GCP, custom routes with a --tags parameter only apply to VM instances that have that specific network tag. The route was created with --tags no-ip, meaning only VMs tagged no-ip will route their 0.0.0.0/0 traffic through the NAT gateway VM. To make existing instances use this route, you must add the no-ip tag to them using gcloud compute instances add-tags [existing-instance] --tags no-ip. Option A (net.ipv4.ip_forward=1) enables IP forwarding on the NAT gateway itself - this is a prerequisite for the NAT gateway VM but doesn't affect which instances use the route. Options C and D are unrelated to the task.

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