Edge Gateway Overview

An edge gateway can connect subnets in the same VPC but from both HomeZones and central AZs.

Edge gateways are supported in the AF-Johannesburg region.

Edge gateways are free of charge, but if there is a change, you will be notified in advance.

Figure 1 Edge gateway networking architecture
Click to enlarge

Table 1 describes the resource planning of an edge gateway in the cloud.

**Table 1** VPC and subnet planning
VPC	Subnet	AZ	Region
VPC-EG1	Subnet1	HomeZones AZ1	HomeZones region A
	Subnet2	HomeZones AZ2	HomeZones region A
	Center-Subnet1	Central AZ1	Central region A
	Center-Subnet2	Central AZ2	Central region A

Table 2 describes the planning of resources and AZs of an edge gateway.

**Table 2** Edge gateway and edge connection planning
Edge Gateway	AZ	Region	Edge Connection	Global Connection Bandwidth-HomeZones (CN East)
Edge gateway	HomeZones AZ1 HomeZones AZ2	HomeZones region A	Edge connection A	Global connection bandwidth A
Edge gateway	Central AZ1 Central AZ2	Central region A	Edge connection A-Central	Global connection bandwidth A-Central

Table 3 describes the application scenarios of edge gateways.

**Table 3** Edge gateway application scenarios
Scenario	Required Resource	Description	Reference
In VPC-EG1, connect subnets in HomeZones and central AZs.	VPC Subnet in a HomeZones AZ Edge connection in a HomeZones region Global connection bandwidth in a HomeZones region Subnet in a central AZ Edge connection in a central region Global connection bandwidth in a central region	In VPC-EG1, Subnet1 and Subnet2 in the HomeZones AZ and Center-Subnet1 and Center-Subnet2 in the central AZ need to communicate with each other. In the HomeZones AZ, edge connection A needs to be created and has the global connection bandwidth A bound. In the central AZ, edge connection A-central needs to be created and has the global connection bandwidth A-central bound.	Edge gateways: An edge gateway can have one or more VPCs attached. Associating VPCs with an Edge Gateway: The number of VPCs that can be associated with an edge gateway varies by gateway specifications. Creating an Edge Connection: An edge connection can be shared in all AZs of the same region. Binding a Global Connection Bandwidth to an Edge Connection: An edge connection can only have one global connection bandwidth bound.