A. Instruct the customer to check their network firewall rules to ensure that outbound traffic to your API endpoint is allowed. Provide them with a list of IP addresses for your service.

B. Implement retry logic within the external function calls with exponential backoff. Log all failed attempts, including timestamps and error messages, within your provider's environment, for later analysis. Provide the customer with aggregated success/failure metrics from your logs.

C. Create a separate Snowflake Native App that only tests network connectivity to the external API endpoint. Ask the consumer to install and run the application, and provide you with the results.

D. Migrate the external functions to use Snowflake's Snowpark Container Services to ensure they run within the Snowflake environment and bypass any network restrictions.

E. Monitor the external functions calls from system $ table and analyze the latency and error codes.