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ENA queues - Amazon Elastic Compute Cloud
Supported instancesModify the number of queues
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ENA queues

ENA queues are allocated to network interfaces with default static limits based on the instance type and size. On supported instance types, you can dynamically allocate these queues across Elastic Network Interfaces (ENIs). While the total queue count per instance depends on its type and size, you can configure multiple ENIs with ENA queues until you meet the maximum queue count for the ENI and the instance.

Flexible ENA queue allocation optimizes resource distribution, enabling maximum vCPU utilization. High network performance workloads typically require multiple ENA queues. You can fine-tune network performance and packets per second (PPS) by adjusting queue counts according to your specific workload needs. For example, network-intensive applications may require more queues compared to CPU-intensive applications.

Supported instances

The following instances support dynamic allocation of multiple ENA queues.

General purpose

Instance type Default ENA queues per interface Maximum ENA queues per interface Maximum ENA queues per instance
M6i
m6i.large 2 2 6
m6i.xlarge 4 4 16
m6i.2xlarge 8 8 32
m6i.4xlarge 8 16 64
m6i.8xlarge 8 32 64
m6i.12xlarge 8 32 64
m6i.16xlarge 8 32 120
m6i.24xlarge 8 32 120
m6i.32xlarge 8 32 120
M6id
m6id.large 2 2 6
m6id.xlarge 4 4 16
m6id.2xlarge 8 8 32
m6id.4xlarge 8 16 64
m6id.8xlarge 8 32 64
m6id.12xlarge 8 32 64
m6id.16xlarge 8 32 120
m6id.24xlarge 8 32 120
m6id.32xlarge 8 32 120
M6idn
m6idn.large 2 2 6
m6idn.xlarge 4 4 16
m6idn.2xlarge 8 8 32
m6idn.4xlarge 8 16 64
m6idn.8xlarge 16 32 128
m6idn.12xlarge 16 32 128
m6idn.16xlarge 16 32 240
m6idn.24xlarge 32 32 480
m6idn.32xlarge 32 32 512 *
M6in
m6in.large 2 2 6
m6in.xlarge 4 4 16
m6in.2xlarge 8 8 32
m6in.4xlarge 8 16 64
m6in.8xlarge 16 32 128
m6in.12xlarge 16 32 128
m6in.16xlarge 16 32 240
m6in.24xlarge 32 32 480
m6in.32xlarge 32 32 512 *
M8a
m8a.medium 1 1 3
m8a.large 2 2 6
m8a.xlarge 4 4 16
m8a.2xlarge 8 8 32
m8a.4xlarge 8 16 64
m8a.8xlarge 8 32 128
m8a.12xlarge 16 64 192
m8a.16xlarge 16 64 256
m8a.24xlarge 16 128 384
m8a.48xlarge 32 128 768
m8a.metal-24xl 16 128 384
m8a.metal-48xl 32 128 768
M8azn
m8azn.medium 1 1 3
m8azn.large 2 2 8
m8azn.xlarge 4 4 16
m8azn.3xlarge 4 16 48
m8azn.6xlarge 8 32 96
m8azn.12xlarge 8 64 192
m8azn.24xlarge 16 128 384
m8azn.metal-12xl 8 64 192
m8azn.metal-24xl 16 128 384
M8gb
m8gb.medium 1 1 2
m8gb.large 2 2 6
m8gb.xlarge 4 4 16
m8gb.2xlarge 8 8 32
m8gb.4xlarge 8 16 64
m8gb.8xlarge 8 32 128
m8gb.12xlarge 16 64 192
m8gb.16xlarge 16 64 256
m8gb.24xlarge 16 128 384
m8gb.48xlarge 32 128 768 *
m8gb.metal-24xl 32 128 768
m8gb.metal-48xl 32 128 768 *
M8gn
m8gn.medium 1 1 2
m8gn.large 2 2 6
m8gn.xlarge 4 4 16
m8gn.2xlarge 8 8 32
m8gn.4xlarge 8 16 64
m8gn.8xlarge 8 32 128
m8gn.12xlarge 16 64 192
m8gn.16xlarge 16 64 256
m8gn.24xlarge 16 128 384
m8gn.48xlarge 32 128 768 *
m8gn.metal-24xl 32 128 768
m8gn.metal-48xl 32 128 768 *
M8i
m8i.large 2 2 6
m8i.xlarge 4 4 16
m8i.2xlarge 8 8 32
m8i.4xlarge 8 16 64
m8i.8xlarge 8 32 128
m8i.12xlarge 16 64 192
m8i.16xlarge 16 64 256
m8i.24xlarge 16 128 384
m8i.32xlarge 16 128 512
m8i.48xlarge 32 128 768
m8i.96xlarge 32 128 1536
m8i.metal-48xl 32 128 768
m8i.metal-96xl 32 128 1536
M8id
m8id.large 2 2 6
m8id.xlarge 4 4 16
m8id.2xlarge 8 8 32
m8id.4xlarge 8 16 64
m8id.8xlarge 8 32 128
m8id.12xlarge 16 64 192
m8id.16xlarge 16 64 256
m8id.24xlarge 16 128 384
m8id.32xlarge 16 128 512
m8id.48xlarge 32 128 768
m8id.96xlarge 32 128 1536
m8id.metal-48xl 32 128 768
m8id.metal-96xl 32 128 1536
M8i-flex
m8i-flex.large 1 1 3
m8i-flex.xlarge 2 2 8
m8i-flex.2xlarge 4 4 16
m8i-flex.4xlarge 4 8 32
m8i-flex.8xlarge 4 16 64
m8i-flex.12xlarge 8 32 96
m8i-flex.16xlarge 8 32 128
M8in
m8in.large 2 2 8
m8in.xlarge 4 4 16
m8in.2xlarge 8 8 32
m8in.4xlarge 8 16 64
m8in.8xlarge 16 32 128
m8in.12xlarge 16 64 192
m8in.16xlarge 16 64 256
m8in.24xlarge 16 128 256
m8in.32xlarge 32 128 512
m8in.48xlarge 32 128 768
m8in.96xlarge 32 128 1536 *
M8ine
m8ine.large 2 2 8
m8ine.xlarge 4 4 16
m8ine.2xlarge 8 8 32
m8ine.4xlarge 16 16 128
m8ine.8xlarge 32 32 256
m8ine.12xlarge 32 64 384
M8ib
m8ib.large 2 2 8
m8ib.xlarge 4 4 16
m8ib.2xlarge 8 8 32
m8ib.4xlarge 8 16 64
m8ib.8xlarge 16 32 128
m8ib.12xlarge 16 64 192
m8ib.16xlarge 16 64 256
m8ib.24xlarge 16 128 256
m8ib.32xlarge 32 128 512
m8ib.48xlarge 32 128 768
m8ib.96xlarge 32 128 1536 *
Note

* These instance types feature multiple network cards. Other instance types feature a single network card. For more information, see Network cards.

Compute optimized

Instance type Default ENA queues per interface Maximum ENA queues per interface Maximum ENA queues per instance
C6i
c6i.large 2 2 6
c6i.xlarge 4 4 16
c6i.2xlarge 8 8 32
c6i.4xlarge 8 16 64
c6i.8xlarge 8 32 64
c6i.12xlarge 8 32 64
c6i.16xlarge 8 32 120
c6i.24xlarge 8 32 120
c6i.32xlarge 8 32 120
C6id
c6id.large 2 2 6
c6id.xlarge 4 4 16
c6id.2xlarge 8 8 32
c6id.4xlarge 8 16 64
c6id.8xlarge 8 32 64
c6id.12xlarge 8 32 64
c6id.16xlarge 8 32 120
c6id.24xlarge 8 32 120
c6id.32xlarge 8 32 120
C6in
c6in.large 2 2 6
c6in.xlarge 4 4 16
c6in.2xlarge 8 8 32
c6in.4xlarge 8 16 64
c6in.8xlarge 16 32 128
c6in.12xlarge 16 32 128
c6in.16xlarge 16 32 240
c6in.24xlarge 32 32 480
c6in.32xlarge 32 32 512 *
C8a
c8a.medium 1 1 3
c8a.large 2 2 6
c8a.xlarge 4 4 16
c8a.2xlarge 8 8 32
c8a.4xlarge 8 16 64
c8a.8xlarge 8 32 128
c8a.12xlarge 16 64 192
c8a.16xlarge 16 64 256
c8a.24xlarge 16 128 384
c8a.48xlarge 32 128 768
c8a.metal-24xl 16 128 384
c8a.metal-48xl 32 128 768
C8gb
c8gb.medium 1 1 2
c8gb.large 2 2 6
c8gb.xlarge 4 4 16
c8gb.2xlarge 8 8 32
c8gb.4xlarge 8 16 64
c8gb.8xlarge 8 32 128
c8gb.12xlarge 16 64 192
c8gb.16xlarge 16 64 256
c8gb.24xlarge 16 128 384
c8gb.48xlarge 32 128 768 *
c8gb.metal-24xl 32 128 768
c8gb.metal-48xl 32 128 768 *
C8gn
c8gn.medium 1 1 2
c8gn.large 2 2 6
c8gn.xlarge 4 4 16
c8gn.2xlarge 8 8 32
c8gn.4xlarge 8 16 64
c8gn.8xlarge 8 32 128
c8gn.12xlarge 16 64 192
c8gn.16xlarge 16 64 256
c8gn.24xlarge 16 128 384
c8gn.48xlarge 32 128 768 *
c8gn.metal-24xl 32 128 768
c8gn.metal-48xl 32 128 768 *
C8i
c8i.large 2 2 6
c8i.xlarge 4 4 16
c8i.2xlarge 8 8 32
c8i.4xlarge 8 16 64
c8i.8xlarge 8 32 128
c8i.12xlarge 16 64 192
c8i.16xlarge 16 64 256
c8i.24xlarge 16 128 384
c8i.32xlarge 16 128 512
c8i.48xlarge 32 128 768
c8i.96xlarge 32 128 1536
c8i.metal-48xl 32 128 768
c8i.metal-96xl 32 128 1536
C8id
c8id.large 2 2 6
c8id.xlarge 4 4 16
c8id.2xlarge 8 8 32
c8id.4xlarge 8 16 64
c8id.8xlarge 8 32 128
c8id.12xlarge 16 64 192
c8id.16xlarge 16 64 256
c8id.24xlarge 16 128 384
c8id.32xlarge 16 128 512
c8id.48xlarge 32 128 768
c8id.96xlarge 32 128 1536
c8id.metal-48xl 32 128 768
c8id.metal-96xl 32 128 1536
C8i-flex
c8i-flex.large 1 1 3
c8i-flex.xlarge 2 2 8
c8i-flex.2xlarge 4 4 16
c8i-flex.4xlarge 4 8 32
c8i-flex.8xlarge 4 16 64
c8i-flex.12xlarge 8 32 96
c8i-flex.16xlarge 8 32 128
C8in
c8in.large 2 2 8
c8in.xlarge 4 4 16
c8in.2xlarge 8 8 32
c8in.4xlarge 8 16 64
c8in.8xlarge 16 32 128
c8in.12xlarge 16 64 192
c8in.16xlarge 16 64 256
c8in.24xlarge 16 128 256
c8in.32xlarge 32 128 512
c8in.48xlarge 32 128 768
c8in.96xlarge 32 128 1536 *
c8in.metal-48xl 32 128 768
c8in.metal-96xl 32 128 1536 *
C8ine
c8ine.large 2 2 8
c8ine.xlarge 4 4 16
c8ine.2xlarge 8 8 32
c8ine.4xlarge 16 16 128
c8ine.8xlarge 32 32 256
c8ine.12xlarge 32 64 384
C8ib
c8ib.large 2 2 8
c8ib.xlarge 4 4 16
c8ib.2xlarge 8 8 32
c8ib.4xlarge 8 16 64
c8ib.8xlarge 16 32 128
c8ib.12xlarge 16 64 192
c8ib.16xlarge 16 64 256
c8ib.24xlarge 16 128 256
c8ib.32xlarge 32 128 512
c8ib.48xlarge 32 128 768
c8ib.96xlarge 32 128 1536 *
c8ib.metal-48xl 32 128 768
c8ib.metal-96xl 32 128 1536 *
Note

* These instance types feature multiple network cards. Other instance types feature a single network card. For more information, see Network cards.

Memory optimized

Instance type Default ENA queues per interface Maximum ENA queues per interface Maximum ENA queues per instance
R6i
r6i.large 2 2 6
r6i.xlarge 4 4 16
r6i.2xlarge 8 8 32
r6i.4xlarge 8 16 64
r6i.8xlarge 8 32 64
r6i.12xlarge 8 32 64
r6i.16xlarge 8 32 120
r6i.24xlarge 8 32 120
r6i.32xlarge 8 32 120
R6id
r6id.large 2 2 6
r6id.xlarge 4 4 16
r6id.2xlarge 8 8 32
r6id.4xlarge 8 16 64
r6id.8xlarge 8 32 64
r6id.12xlarge 8 32 64
r6id.16xlarge 8 32 120
r6id.24xlarge 8 32 120
r6id.32xlarge 8 32 120
R6idn
r6idn.large 2 2 6
r6idn.xlarge 4 4 16
r6idn.2xlarge 8 8 32
r6idn.4xlarge 8 16 64
r6idn.8xlarge 16 32 128
r6idn.12xlarge 16 32 128
r6idn.16xlarge 16 32 240
r6idn.24xlarge 32 32 480
r6idn.32xlarge 32 32 512 *
R6in
r6in.large 2 2 6
r6in.xlarge 4 4 16
r6in.2xlarge 8 8 32
r6in.4xlarge 8 16 64
r6in.8xlarge 16 32 128
r6in.12xlarge 16 32 128
r6in.16xlarge 16 32 240
r6in.24xlarge 32 32 480
r6in.32xlarge 32 32 512 *
R8a
r8a.medium 1 1 3
r8a.large 2 2 6
r8a.xlarge 4 4 16
r8a.2xlarge 8 8 32
r8a.4xlarge 8 16 64
r8a.8xlarge 8 32 128
r8a.12xlarge 16 64 192
r8a.16xlarge 16 64 256
r8a.24xlarge 16 128 384
r8a.48xlarge 32 128 768
r8a.metal-24xl 16 128 384
r8a.metal-48xl 32 128 768
R8gb
r8gb.medium 1 1 2
r8gb.large 2 2 6
r8gb.xlarge 4 4 16
r8gb.2xlarge 8 8 32
r8gb.4xlarge 8 16 64
r8gb.8xlarge 8 32 128
r8gb.12xlarge 16 64 192
r8gb.16xlarge 16 64 256
r8gb.24xlarge 16 128 384
r8gb.48xlarge 32 128 768 *
r8gb.metal-24xl 32 128 768
r8gb.metal-48xl 32 128 768 *
R8gn
r8gn.medium 1 1 2
r8gn.large 2 2 6
r8gn.xlarge 4 4 16
r8gn.2xlarge 8 8 32
r8gn.4xlarge 8 16 64
r8gn.8xlarge 8 32 128
r8gn.12xlarge 16 64 192
r8gn.16xlarge 16 64 256
r8gn.24xlarge 16 128 384
r8gn.48xlarge 32 128 768 *
r8gn.metal-24xl 32 128 768
r8gn.metal-48xl 32 128 768 *
R8i
r8i.large 2 2 6
r8i.xlarge 4 4 16
r8i.2xlarge 8 8 32
r8i.4xlarge 8 16 64
r8i.8xlarge 8 32 128
r8i.12xlarge 16 64 192
r8i.16xlarge 16 64 256
r8i.24xlarge 16 128 384
r8i.32xlarge 16 128 512
r8i.48xlarge 32 128 768
r8i.96xlarge 32 128 1536
r8i.metal-48xl 32 128 768
r8i.metal-96xl 32 128 1536
R8id
r8id.large 2 2 6
r8id.xlarge 4 4 16
r8id.2xlarge 8 8 32
r8id.4xlarge 8 16 64
r8id.8xlarge 8 32 128
r8id.12xlarge 16 64 192
r8id.16xlarge 16 64 256
r8id.24xlarge 16 128 384
r8id.32xlarge 16 128 512
r8id.48xlarge 32 128 768
r8id.96xlarge 32 128 1536
r8id.metal-48xl 32 128 768
r8id.metal-96xl 32 128 1536
R8i-flex
r8i-flex.large 1 1 3
r8i-flex.xlarge 2 2 8
r8i-flex.2xlarge 4 4 16
r8i-flex.4xlarge 4 8 32
r8i-flex.8xlarge 4 16 64
r8i-flex.12xlarge 8 32 96
r8i-flex.16xlarge 8 32 128
R8in
r8in.large 2 2 8
r8in.xlarge 4 4 16
r8in.2xlarge 8 8 32
r8in.4xlarge 8 16 64
r8in.8xlarge 16 32 128
r8in.12xlarge 16 64 192
r8in.16xlarge 16 64 256
r8in.24xlarge 16 128 256
r8in.32xlarge 32 128 512
r8in.48xlarge 32 128 768
r8in.96xlarge 32 128 1536 *
R8ib
r8ib.large 2 2 8
r8ib.xlarge 4 4 16
r8ib.2xlarge 8 8 32
r8ib.4xlarge 8 16 64
r8ib.8xlarge 16 32 128
r8ib.12xlarge 16 64 192
r8ib.16xlarge 16 64 256
r8ib.24xlarge 16 128 256
r8ib.32xlarge 32 128 512
r8ib.48xlarge 32 128 768
r8ib.96xlarge 32 128 1536 *
X8aedz
x8aedz.large 2 2 8
x8aedz.xlarge 4 4 16
x8aedz.3xlarge 4 16 48
x8aedz.6xlarge 8 32 96
x8aedz.12xlarge 8 64 192
x8aedz.24xlarge 16 128 384
x8aedz.metal-12xl 8 64 192
x8aedz.metal-24xl 16 128 384
X8i
x8i.large 2 2 6
x8i.xlarge 4 4 16
x8i.2xlarge 8 8 32
x8i.4xlarge 8 16 64
x8i.8xlarge 8 32 128
x8i.12xlarge 16 64 192
x8i.16xlarge 16 64 256
x8i.24xlarge 16 128 384
x8i.32xlarge 16 128 512
x8i.48xlarge 32 128 768
x8i.64xlarge 32 128 1024
x8i.96xlarge 32 128 1536
x8i.metal-48xl 32 128 768
x8i.metal-96xl 32 128 1536
Note

* These instance types feature multiple network cards. Other instance types feature a single network card. For more information, see Network cards.

Modify the number of queues

You can modify the number of ENA queues using the Amazon Web Services Management Console, Amazon CLI, or PowerShell. In the Amazon Web Services Management Console, the ENA queues configuration is available under each Network interface setting.

Note

  • Your instance must be stopped before modifying the number of ENA queues.

  • The value for ENA queues must be a power of 2, such as, 1, 2, 4, 8, 16, 32, etc.

  • The number of queues allocated to any single ENI cannot exceed the number of vCPUs available on your instance.

Before modifying the queue count, use the following command to check your current queue count.

Amazon CLI
aws ec2 describe-instances --instance-id i-1234567890abcdef0
PowerShell
(Get-EC2Instance -InstanceId i-1234567890abcdef0).Instances.NetworkInterfaces |
  Select-Object NetworkInterfaceId,
    @{N='DeviceIndex';E={$_.Attachment.DeviceIndex}},
    @{N='AttachmentId';E={$_.Attachment.AttachmentId}},
    @{N='EnaQueueCount';E={$_.Attachment.EnaQueueCount}}

Attach a network interface with ENA queues

In the following example, 16 ENA queues are configured on an ENI.

Amazon CLI
To attach a network interface with ENA queues

Use the attach-network-interface command.

aws ec2 attach-network-interface \
  --network-interface-id eni-abcdef01234567890 \
  --instance-id i-1234567890abcdef0 \
  --device-index 1 \
  --ena-queue-count 16
PowerShell
To attach a network interface with ENA queues

Use the Add-EC2NetworkInterface cmdlet.

Add-EC2NetworkInterface `
  -NetworkInterfaceId eni-abcdef01234567890 `
  -InstanceId i-1234567890abcdef0 `
  -DeviceIndex 1 `
  -EnaQueueCount 16

Launch an instance with ENA queues

In the following example, 16 ENA queues each are configured on 3 ENIs.

Amazon CLI
To launch an instance with ENA queues

Use the run-instances command.

aws ec2 run-instances \
  --image-id ami-1234567890abcdef0 \
  --instance-type c8i.4xlarge \
  --network-interfaces \
    "[{\"DeviceIndex\":0,\"SubnetId\":\"subnet-abcdef01234567890\",\"EnaQueueCount\":16},
      {\"DeviceIndex\":1,\"SubnetId\":\"subnet-abcdef01234567890\",\"EnaQueueCount\":16},
      {\"DeviceIndex\":2,\"SubnetId\":\"subnet-abcdef01234567890\",\"EnaQueueCount\":16}]"
PowerShell
To launch an instance with ENA queues

Use the New-EC2Instance cmdlet.

New-EC2Instance `
  -ImageId ami-1234567890abcdef0 `
  -InstanceType c8i.4xlarge `
  -NetworkInterface @(
    @{DeviceIndex=0; SubnetId="subnet-abcdef01234567890"; EnaQueueCount=16},
    @{DeviceIndex=1; SubnetId="subnet-abcdef01234567890"; EnaQueueCount=16},
    @{DeviceIndex=2; SubnetId="subnet-abcdef01234567890"; EnaQueueCount=16}
  )

Modify ENA queues on an existing network interface

In the following example, 16 ENA queues are configured on an ENI.

Amazon CLI
To modify ENA queues on a network interface

Use the modify-network-interface-attribute command.

aws ec2 modify-network-interface-attribute \
  --network-interface-id eni-1234567890abcdef0 \
  --attachment AttachmentId=eni-attach-1234567890abcdef0,EnaQueueCount=16
PowerShell
To modify ENA queues on a network interface

Use the Edit-EC2NetworkInterfaceAttribute cmdlet.

Edit-EC2NetworkInterfaceAttribute `
  -NetworkInterfaceId eni-1234567890abcdef0 `
  -Attachment_AttachmentId eni-attach-1234567890abcdef0 `
  -Attachment_EnaQueueCount 16

In the following example, the ENA count is reset to the default value.

Amazon CLI
aws ec2 modify-network-interface-attribute \
  --network-interface-id eni-1234567890abcdef0 \
  --attachment AttachmentId=eni-attach-1234567890abcdef0,DefaultEnaQueueCount=true
PowerShell
Edit-EC2NetworkInterfaceAttribute `
  -NetworkInterfaceId eni-1234567890abcdef0 `
  -Attachment_AttachmentId eni-attach-1234567890abcdef0 `
  -Attachment_DefaultEnaQueueCount $true