Global VPC & Regional Subnet

Global Virtual Private Cloud (VPC) allows you to create isolated networks, manage IP addressing, and establish secure connections between instances across multiple regions globally.

Regional subnets allow you to customize subnet configurations within designated regions to help enhance your network architecture with precise control and improved efficiency.

Global VPC networks provide connectivity for your Elastic Compute instances and to Internet. Each subnet in a VPC network is associated with a region and contains one or more IP address ranges. You can create more than one subnet per region. If the global VPC supports IPv6 ranges, the subnets in it can enable IPv4 and IPv6 Network Stack.

The vNIC for your Elastic Compute instance must be connected to a subnet. When you create an Elastic Compute instance, you can specify a VPC network and subnet. If you omit this configuration, the default VPC and subnet are used.

For example:

• Default Global VPC: 10.0.0.0/8

• Default subnet in Shanghai: 10.130.0.0/20

Note

A global VPC must be associated with one security group only to improve security.

MTU

The Maximum Transmission Unit (MTU) represents the largest amount of data that can be sent in one frame without fragmentation. If a packet is larger than the MTU of a VPC, it needs to be fragmented into smaller pieces for transmission. Select proper MTU value to optimize network performance.

• 1300: Relatively smaller size used in certain special network environments with packet size limited

• 1500: Most common size used for data transmission in Ethernet networks

• 9000: Larger size known as Jumbo Frames used in high-performance networks to improve data transfer efficiency

Note

MTU 9000 is typically restricted to private network use to avoid data loss.