Document Center

All Products

Document Center

Platform For AI:Overview of invocation methods

Last Updated:Mar 01, 2026

EAS offers five invocation methods. This guide helps you choose the one that best fits your requirements.

Architecture overview

Important

After you configure a virtual private cloud (VPC), vSwitch, and security group for an EAS service, the following conditions apply:

Accessing EAS through a shared gateway or a dedicated gateway is not restricted by security group rules. For a dedicated gateway, however, you can configure access rules with a whitelist.
Accessing EAS through NLB, Nacos, or a VPC direct connection, and all outbound traffic from EAS, are restricted by security group rules.

Feature comparison

Invocation method	Features	Scenarios
Shared gateway	Free and available out-of-the-box. Lacks support for custom access policies and provides limited isolation and elasticity.	Ideal for services that handle low traffic and do not require high performance or strong isolation.
Dedicated gateway	A paid service that requires creation. Supports custom access policies, cross-VPC and cross-cloud access, and custom domain names.	Recommended for services that require high security, stability, and performance, and can handle high traffic.
VPC direct connection	Provides direct access via IP address by bypassing the gateway, which improves performance and reduces latency. Offers limited load balancing capabilities.	Ideal for high-traffic services.
Server Load Balancer (NLB)	Requires a pre-configured NLB instance. Allows you to use all of NLB's access control capabilities.	Best for services with extremely high traffic that require robust load balancing.
Service discovery (Nacos)	Requires a pre-configured Nacos instance. Allows you to use all of Nacos's access control capabilities.	Ideal for environments that use Nacos for service registration and discovery.