How to enable ApplianceModeSupport in a Transit GW Attachment

Question

I am trying to enable the applicance mode with the following CLI command as per the online documentation:

C:\Users\Pablo>aws ec2 modify-transit-gateway-vpc-attachment --transit-gateway-attachment-id tgw-attach-0b6cb80499a53XXXX --options ApplianceModeSupport=enable

Parameter validation failed:
    Unknown parameter in Options: "ApplianceModeSupport", must be one of: DnsSupport, Ipv6Support

I tried changing the DnsSupport option to make sure I'm in the right region and transit gateway attach and works:

C:\Users\Pablo>aws ec2 modify-transit-gateway-vpc-attachment --transit-gateway-attachment-id tgw-attach-0b6cb80499a5383e9 --options DnsSupport=disable

{
    "TransitGatewayVpcAttachment": {
        "TransitGatewayAttachmentId": "tgw-attach-0b6cb80499a53XXXX",
        "TransitGatewayId": "tgw-01e5ee317cd46YYY3",
        "VpcId": "vpc-02e3c21f4d7dacZZZ",
        "VpcOwnerId": "95107885XXXX",
        "State": "modifying",
        "SubnetIds": [
            "subnet-0c24bb7aae4deeXXX",
            "subnet-064acc2ad5667aXXX",
            "subnet-03b6351363cd1cXXX"
        ],
        "CreationTime": "2022-09-27T18:09:59+00:00",
        "Options": {
            "DnsSupport": "disable",
            "Ipv6Support": "disable"
        }
    }
    }

It looks like this transit gateway attachment does not have this option. What am I doing wrong?

Accepted Answer

I was able to figure it out. The problem was my AWS Cli version 2.0.52. Updated to the last one 2.7.35 and voila, problem fixed.

Answer

Hello,

Your command syntax seems to be correct; Can you try with region explicitly mentioned in the command:

Example:

`aws ec2 modify-transit-gateway-vpc-attachment --transit-gateway-attachment-id tgw-attach-0b6cb80499a53XXXX --options ApplianceModeSupport=enable --region `

Then run below command to verify:

`aws ec2 describe-transit-gateways --filters --transit-gateway-ids tgw-attach-0b6cb80499a53XXXX`

How to enable ApplianceModeSupport in a Transit GW Attachment

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