Create and attach an Elastic Fabric Adapter to an Amazon EC2 instance

To create an EFA (EFA with ENA or ENA-only) network interface

1. Open the Amazon EC2 console at https://console.amazonaws.cn/ec2/.

2. In the navigation pane, choose Network Interfaces and then choose Create network interface.

3. For Description, enter a descriptive name for the EFA.

4. For Subnet, select the subnet in which to create the EFA.

5. Interface type, choose one of the following options:

   • EFA with ENA — To create a network interface that supports both ENA and EFA devices.

   • EFA-only — To create a network interface with an EFA device only.

6. (For EFA with ENA only) Configure the IP address and prefix assignment for the network interface. The type of IP addresses and prefixes you can assign depend on the selected subnet. For IPv4-only subnets, you can assign IPv4 IP addresses and prefixes only. For IPv6-only subnets, you can assign IPv6 IP addresses and prefixes only. For dual-stack subnets, you can assign both IPv4 and IPv6 IP addresses and prefixes.

   Note

   You can't assign IP addresses to an EFA-only network interface.

   1. For Private IPv4 address and/or IPv6 address, choose Auto-assign to have Amazon EC2 automatically assign an IP address from the selected subnet, or choose Custom to manually specify the IP address to assign.

   2. If you assign an IPv6 address, you can optionally enable Assign primary IPv6 IP. Doing this assigns a primary IPv6 global unicast address (GUA) to the network interface. Assigning a primary IPv6 address enables you to avoid disrupting traffic to instances or ENIs. For more information, see IPv6 addresses.

   3. For IPv4 prefix delegation and/or IPv6 prefix delegation, choose Auto-assign to have Amazon EC2 automatically assign a prefix from the subnet's CIDR block, or choose Custom to manually specify a prefix from the subnet's CIDR block. If you specify a prefix, Amazon verifies that it is not already assigned to another resource. For more information, see Prefix delegation for Amazon EC2 network interfaces

   4. (Optional) Configure the Idle connection tracking timeout settings. For more information, see Idle connection tracking timeout

      • TCP established timeout — The timeout period, in seconds, for idle TCP connections in an established state. Min: 60 seconds. Max: 432000 seconds (5 days). Default: 432000 seconds. Recommended: Less than 432000 seconds.

      • UDP timeout — The timeout period, in seconds, for idle UDP flows that have seen traffic only in a single direction or a single request-response transaction. Min: 30 seconds. Max: 60 seconds. Default: 30 seconds.

      • UDP stream timeout — The timeout period, in seconds, for idle UDP flows classified as streams that have seen more than one request-response transaction. Min: 60 seconds. Max: 180 seconds (3 minutes). Default: 180 seconds.

7. For Security groups, select one or more security groups.

8. Choose Create network interface.