Supplementary Network Interface

Application Scenarios

Supplementary network interfaces are attached to VLAN subinterfaces of elastic network interfaces. Figure 1 shows the networking diagram.

Figure 1 Supplementary network interface networking diagram

The number of elastic network interfaces that can be attached to each ECS is limited. If this limit cannot meet your requirements, you can attach supplementary network interfaces to elastic network interfaces.

• You can attach supplementary network interfaces that belong to different subnets in the same VPC to an ECS. Each supplementary network interface has its private IP address and EIP for private or Internet communication.
• You can security group rules for supplementary network interfaces for network isolation.

Managing Supplementary Network Interfaces

• Creating a Supplementary Network Interface
• Binding or Unbinding an EIP to or from a Supplementary Network Interface