Overview

Elastic Network Interface

An elastic network interface (referred to as a network interface in this documentation) is a virtual network card. Each iMetal server comes with a network interface, which cannot be detached.

Supplementary Network Interface

Supplementary network interfaces can be attached to VLAN sub-interfaces of network interfaces of an iMetal server for flexible and high-availability network configuration.

Application Scenario of Supplementary Network Interfaces

An iMetal server can have only one network interface. If you need more network interfaces, you can attach supplementary network interfaces to the network interface. These supplementary network interfaces can be in different subnets of the same VPC, each with a private IP address for internal communication.

Supplementary network interfaces are attached to VLAN sub-interfaces of network interfaces. Figure 1 shows the networking diagram.

Figure 1 Supplementary network interface networking diagram

Constraints

• EIPs and virtual IP addresses cannot be bound to the network interfaces or supplementary network interfaces in a CloudDCN subnet.
• Security groups cannot be associated with supplementary network interfaces in a CloudDCN subnet.