Last updated：2021-06-15 11:18:28
An elastic network interface (ENI) is a virtual network interface card (NIC) that can be attached to a Kingsoft Cloud Elastic Compute (KEC) instance. By using ENIs, you can conduct low-cost failover and fine-grained network management. ENIs are independent from each other and can be migrated among KEC instances. This provides flexible expansion and migration capabilities for your business.
GEC instances provide the same ENI properties and features as KEC instances.
Primary ENI: When you create an instance, a primary ENI is created and attached to the instance. Primary ENIs cannot be detached from their instances.
Secondary ENI: Secondary ENIs are manually created and can be attached to or detached from instances.
Virtual Private Cloud (VPC): ENIs of an instance can reside in one or more VPCs.
Subnet: ENIs of an instance can reside on one or more subnets.
Availability zone (AZ): Subnets in which ENIs reside must be in the same AZ as the instance to which the ENIs are attached.
Security group: The inbound traffic and outbound traffic of ENIs that are added to a security group are controlled by this security group.
Subnet IPv4 address: Subnet IPv4 addresses can be manually or automatically allocated.
MAC address: Each ENI is allocated with a globally unique MAC address.
You can perform the following operations on ENIs:
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