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How to add an additional Network Interface to a LoadMaster in Amazon Web Services (AWS)

By default, the LoadMaster deploys with one NIC in AWS. However, it is possible to configure the LoadMaster to handle multiple NICs in AWS during or after deployment.

This guide covers the steps to deploy an additional NIC and assumes you already have successfully deployed a LoadMaster in AWS. If you need assistance deploying a LoadMaster in the AWS platform, please refer to the link below or contact KEMP Support.

Different instance types have limitations on how many additional NICs you can add. Please refer to the AWS link below to see what instance size supports how ever many NICs you need: 

To successfully deploy another NIC, you must also deploy a few other things in AWS:

  • An additional Subnet in your Virtual Private Cloud (VPC): This subnet will be for the new interface.
  • An additional NIC: This attaches to the EC2 instance of the LoadMaster.
  • An elastic IP: This is the other public IP address the LoadMaster uses for the additional NIC., this is not required if this interface is going to be used just for internal traffic
  1. Setup the LoadMaster as normal as detailed in our deployment guide
  2. Setup the second subnet in the same availability zone and VPC as the LoadMaster
    1.  from the AWS console menu VPC > subnets
    2. Select "Create subnet"AWS_adding_additional_NIC_2.png
    3. while creating the subnet make sure that this subnet is on the same VPC and availability zone as your deployed LoadMasterAWS_adding_additional_NIC_3.png
    4. once this is finished you should now have two subnets availableAWS_adding_additional_NIC_4.png
  3. Setup the new interface for the LoadMaster
    1. From the EC2 menu Network & Security > Network Interfaces
    2. you should already see one NIC for the LoadMaster which would be eth 0
      select "Create network interface"
    3. Select "Actions" and attach the new interface to the LoadMaster
  4. Assign a elastic IP address (if required)
    1. From the EC2 menu Network & Security > Elastic IPs
    2. Select "Allocate Elastic IP address" to create a new elastic IP

    3. select "action" and "Associate Elastic IP address" to assign the elastic IP address to the interface of the LoadMasterAWS_adding_additional_NIC_11.png
  5. connect to the WUI of the LoadMaster and you should now see that it has an additional NIC,
    if you are not seeing this you may need to reboot the LoadMaster.


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