NAT Gateway Instance Diagnosis

The NAT gateway integrates with the Network Diagnostic Service (NDS), offering one-click instance-level diagnostics. It can assess the configuration and operational state of instances, providing intelligent repair suggestions for identified issues. The diagnostics primarily cover connectivity checks, configuration analysis, capacity overload detection, and billing reviews, with the option to view historical diagnostic details.

Prerequisites

• The NAT gateway as described encompasses both public and private NAT gateways.
• For specific operations, refer to Public NAT and Virtual private cloud NAT.

Instance diagnosis

Both types of NAT gateways support instance-level diagnostics.

1. Sign in to the NAT gateway Console.
2. On the NAT gateway page, find the desired NAT gateway, click on "Instance Diagnosis" in the diagnosis column, and then select "Initiate Diagnosis" in the dialog box.

3. On the instance health diagnostic panel, monitor the diagnostic progress, summary results, and detailed diagnostic information for the instance.

   • Anomalies detected will appear directly on this panel. You can expand the details to examine the specific issues.
   • In the diagnostic item details section, choose "Show All Diagnostic Items" to view every diagnostic item supported by the NAT gateway, allowing users to examine details for each one.
4. Users can also click the option to review historical diagnostic records at the top of the Instance Health Diagnosis panel, which redirects to the details page for this NAT gateway in the Instance Diagnosis Console.

Instance diagnostic items and details

The diagnostic items and descriptions supported by NAT gateway are as follows:

Verify if the private NAT gateway instance is in a debt status.

Classification of diagnostic items	Diagnostic item	Description
Connectivity diagnosis	Rate limit packet loss check	Verify whether the NAT gateway instance has experienced rate-limiting or packet drops due to exceeding specifications in the past 2 hours.
Configuration diagnosis	Instance service status check	Evaluate the current status of the NAT gateway instance.
	NAT binding status check	Confirm whether the NAT gateway instance has been bound to an EIP or NAT IP.
	NAT policy configuration check	Ensure that the NAT gateway instance has appropriate SNAT and DNAT rules configured.
Capacity overrun diagnosis	NAT instance concurrent connection utilization check	Check if the average concurrent connection utilization of the NAT gateway instance exceeded 80% during the last 2 hours.
	NAT new connection utilization check	Check if the average new connection utilization of the NAT gateway instance exceeded 80% during the last 2 hours.
	NAT bandwidth utilization check	Check if the average bandwidth utilization of the NAT gateway instance exceeded 80% during the last 2 hours.
Cost diagnosis	Cost status check	Verify if the public NAT gateway instance is in a debt status or expiring within 7 days.