According to the VM instance type, a single Virtual Machine can support association with up to eight Elastic Network Interfaces which can respectively belong to different subnets under the same Virtual Private Cloud.
According to the VM instance type, each elastic network interface of the Virtual Machines supports up to 21 private IP addresses, and all private IP address on the same Elastic Network Interface belong to the same subnet.
Each internal network IP address allocated to one Elastic Network Interface can be associated with one Elastic IP address.
Support Elastic Network Interfaces of region-level attribute, breaking through the limitation of availability zones of traditional elastic network interfaces. The elastic network interfaces can be migrated elastically between Virtual Machines in different availability zones in the Virtual Private Cloud.
The Elastic Network Interface can be flexibly migrated between the Virtual Machines in the Virtual Private Cloud. When the Elastic Network Interface is migrated, the assigned private IP address, Elastic IP address and security group remain unchanged.
Support security policy control of network interface level. An Elastic Network Interface can associate to 5 security groups, to achieve precise control of service traffic
Multiple Elastic Network Interfaces may be attached to the Virtual Machines. The traffic of a specific business can be carried by a specific Elastic Network Interface. The Security Group Policy is applied for different Elastic Network Interfaces respectively to accurately separate business traffic and security policies.
Multiple Elastic Network Interfaces that belong to different subnets may be attached to the Virtual Machines. Each subnet can independently set up an IAM policy and a route forwarding policy to achieve security isolation between user business and the network
A fine routing policy can be set up inside the Virtual Machines. The specific business traffic can be forwarded by a specific Elastic Network Interface or a specific IP address.
The multi-IP address feature of the Elastic Network Interface can support scenarios where a single VM is deployed with multiple Internet businesses. For example, a user provides multiple HTTPS-based web businesses on the same VM, and each security certificate needs to be associated with a specific IP address. Based on this deployment method, it can greatly reduce the costs for the users and improve the utilization of VM resources.
Business traffic separation and network isolation is one of the most typical application scenarios of Elastic Network Interface. The Virtual Machines can attach several Elastic Network Interfaces belonging to different subnets in the same Virtual Private Cloud. Specific network interfaces will bear traffic management of Intranet and public network in the Virtual Machines respectively. The access security control policy and the routing policy can be independently set up for subnet. Besides, a separate Security Group Policy can also be configured for Elastic Network Interface, thus realizing network isolation and business traffic separation.
JD Cloud provides an Elastic Network Interface without availability zone that can set up high-availability solutions and provide strong support for the users. Based on keepalived tools, the users can realize disturbance switching of IP or network interface. Under specific context, the users' Elastic Network Interface is in strong correlation with the security device policy and the security certificate. In case of a fault, it needs to use the Elastic Network Interface for migration. Under moderate scenarios, the users can use IP migration to realize disturbance switching.
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