The elastic network interface card of Baidu AI Cloud can be freely migrate among multiple cloud hosts. By bounding various elastic network cards to the cloud host, a high-availability network plan is realized; various intranet IPs can be also bound to the elastic network card, and one EIP can be bound to each intranet IP. The user can realize that different kinds of business traffic can outflow from the network card by IPs of different sources, and multiple IPs are deployed on the single host by configuring the application policy after configuring the IP address.

Currently, the elastic network interface card is at the stage of public beta. If you want to use the elastic network interface card, please Apply for Open Beta Test.

Usage scenarios

• Deploy high-availability clusters: The elastic network interface card is a key component of the system architecture to meet the requirements of the high-availability architecture of the system on the single instance and multiple network cards.
• Fast failover: By uninstalling the elastic network interface card from the cloud host instance and then mounting it to another cloud host instance, the business traffic on the fault instance is quickly migrated to the standby instance to realize the disaster recovery deployment of the service.
• Refined network management: An instance can mount multiple elastic network interface cards. These elastic network interface cards can be located in different subnets and independently configure the security group and ACL security access rules to realize the secure access control of the traffic of each elastic network interface card, as well as the data isolation among different businesses.

Before configuring, you need to know

• Each VPC can support 10 elastic network interface cards.
• The BCC instance and elastic network interface card must be in the same available zone and the same VPC, and different security groups can be mounted in different subnets.
• The enhanced instance of BCC network doesn't support the elastic network interface card.
• The bandwidth capability of BCC is decided by the instance specification, and the mounting of multiple elastic network interface cards to one instance cannot increase the instance bandwidth performance.
• The primary network card of BCC is not an elastic network interface card, and not in the list of elastic network interface cards. The primary network card is configured in the details page of BCC.
• A single network card has a minimum of 1 IP and a maximum of 20 IP.
• Number of elastic network cards which can be mounted on the cloud host = min (host cores, 8)
• Number of IP which can be configured on the network card bound to the cloud host:

Memory	Number of IPs
1G	2
2-8G	8
12-32G	16
Greater than 32G	20

Create an Elastic Network Interface Card

1.On the VPC instance list page, select the VPC instance which has been created and click it to enter the details page.
2.Select "Elastic Network Interface Card" in the navigation bar, and click the "Create an Elastic Network Interface Card" key.
3.Fill in the following configuration information:

Configuration items	Description
Current region	It supports Beijing, Baoding, Guangzhou, Suzhou, Wuhan and Hong Kong, and switches the regions on the top left corner.
Network card name	Name of customized elastic network interface card
Subnet	Subnet to which the elastic network interface card belongs
Security group	The number of security groups bound to the elastic network interface card is 1 at least and 10 at most.
IP address	One main IP is automatically assigned by default, and the secondary IP can be added by yourself.
Description	Edit the relevant description information of the elastic network interface card.

4.Click "Confirm" to create an elastic network interface card.

Mount a Host

1.On the VPC instance list page, select the VPC instance which has been created and click it to enter the details page.

2.In the navigation bar, select "Elastic Network Interface Card" to enter the list of elastic network interface cards.

3.In the operation on the right side of the instance, click "Mount a Host", the pop-up box of "Mount a Host" appears, and select the host to be mounted.

4.Click "Confirm" to mount the host.

Note:

• The cloud host image cannot automatically identify the elastic network interface cards temporarily. After the host is mounted, you should configure the elastic network interface card to enable it to be identified. Refer to BCC Document - Configure an Elastic Network Interface Card.
• Whether the elastic network interface card can mount a cloud host is related to the configuration of the cloud host. The configuration of the cloud host decides the number of elastic network interface cards which can be mounted and the number of IPs on the elastic network interface card.
• To uninstall a mounted host, click "Uninstall a Host" in the instance operation to uninstall the host.

Configure an Elastic Network Interface Card

Add a secondary IP

1.On the VPC instance list page, select the VPC instance which has been created and click it to enter the details page.
2.In the navigation bar, select "Elastic Network Interface Card" to enter the list of elastic network interface cards.
3.In the instance name of elastic network interface card, enter the details page, and select "IP Address" to enter the management page of IP address.

4.Click "Add a Secondary IP", and a pop-up box appears. The IP address is automatically assigned in the subnet where the elastic network interface card is located by default. The users can also specify the available IP in the subnet.

Note:

• After a cloud host is mounted, the secondary IP should be configured manually. Refer to BCC Document - Configure an Elastic Network Interface Card.
• The main IP of the elastic network interface card cannot be released, and the secondary IP can be released.

Associate a security group

1.On the VPC instance list page, select the VPC instance which has been created and click it to enter the details page.
2.In the navigation bar, select "Elastic Network Interface Card" to enter the list of elastic network interface cards.
3.In the instance name of elastic network interface card, enter the details page, and select "Security Group" to enter the management page of security groups.

4.In the associated security group list, click "Associate a Security Group", a pop-up box appears, and select the security group to be associated to the elastic network interface card.

View Monitoring

1.On the VPC instance list page, select the VPC instance which has been created and click it to enter the details page.
2.In the navigation bar, select "Elastic Network Interface Card" to enter the list of elastic network interface cards.
3.In the instance name of elastic network interface card, enter the details page, and select "Monitor" to enter the page of monitoring.
4.You can view the bandwidth, traffic and packet rate of the elastic network interface card.
5.Click "Alarm Details" in the monitoring information, enter the management page of alarm to configure the alarm policy.