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Target customers: Users who want to improve network access control, fine-grained network forwarding, networking, and data plane auditing capabilities of ECS instances. Features released: ECS instances that support the advanced VPC features can be created, including ACLs, route tables, and flow logs. This improves user experience in security, forwarding, and auditing. Limits: 1. When you create ECS instances in a VPC for which advanced VPC features are enabled, ECS automatically filters the ECS instance families and types that support the advanced VPC features. 2. When you change ECS instance types in a VPC for which advanced VPC features are enabled, the new ECS instance types must also support advanced VPC features. When you enable advanced VPC features in a VPC, ECS automatically checks whether you need to upgrade or downgrade the configurations of the instances within the VPC. Then, you can upgrade or downgrade configurations of these instances.