AWS Transit Gateway Service Level Agreement

This AWS Transit Gateway Service Level Agreement (this "SLA") is a policy governing the use of AWS Transit Gateway ("Transit Gateway") and applies separately to each account using Transit Gateway. In the event of a conflict between the terms of this SLA and the terms of the AWS Customer Agreement or other agreement with us governing your use of our Services (the "Agreement"), the terms and conditions of this SLA apply, but only to the extent of such conflict. Capitalized terms used herein but not defined herein shall have the meanings set forth in the Agreement.

SLAs

AWS makes two SLA commitments for Transit Gateway: (1) a Multi-AZ Transit Gateway SLA that governs each Transit Gateway deployed across multiple AZs; and (2) a Single Transit Gateway SLA that governs Transit Gateway deployments individually.  

Multi-AZ Transit Gateway SLA
When a Transit Gateway is deployed concurrently across two or more AZs (“Multi-AZ Transit Gateway”), AWS will use commercially reasonable efforts to make each Multi-AZ Transit Gateway available with a Monthly Uptime Percentage as shown in the table below during any monthly billing cycle (the "Multi-AZ Transit Gateway SLA"):

Single Transit Gateway SLA  
For each individual Transit Gateway deployment (“Single Transit Gateway”), AWS will use commercially reasonable efforts to make the Single Transit Gateway available with a Single TGW Uptime Percentage as shown in the table below during any monthly billing cycle (the "Single Transit Gateway SLA"):

Service Credits

Service Credits are calculated as a percentage of the total charges paid by you for the applicable Transit Gateway for the monthly billing cycle in which the SLA, as applicable, was not met.

We will apply any Service Credits only against future Transit Gateway payments otherwise due from you. At our discretion, we may issue the Service Credit to the credit card you used to pay for the billing cycle in which the Unavailability occurred. Service Credits will not entitle you to any refund or other payment from AWS. A Service Credit will be applicable and issued only if the credit amount for the applicable monthly billing cycle is greater than one dollar ($1 USD). Service Credits may not be transferred or applied to any other account. Unless otherwise provided in the Agreement, your sole and exclusive remedy for any unavailability, non-performance, or other failure by us to provide Transit Gateway is the receipt of a Service Credit (if eligible) in accordance with the terms of this SLA.

Credit Request and Payment Procedures

To receive a Service Credit, you must submit a claim by opening a case in the AWS Support Center. You may not combine or stack claims under the Multi-AZ Transit Gateway SLA and the Single Transit Gateway SLA for a particular Transit Gateway deployment. Your request must be received by us by the end of the second billing cycle after which the incident occurred and must include the information specified below for the Multi-AZ Transit Gateway SLA and Single Transit Gateway SLA, as applicable:

1.    the words “TGW SLA Credit Request” in the subject line;
2.    the dates and times of each Unavailability incident that you are claiming;
3.    the affected Transit Gateway ARNs and Transit Gateway attachment ID;
4.    the billing cycle and AWS regions with respect to which you are claiming Service Credits; and
5.    your request logs that document the errors and corroborate your claimed outage** (any confidential or sensitive information in these logs should be removed or replaced with asterisks).

**Please replace any confidential or sensitive information in these logs with asterisks

If a claim under the applicable SLA is confirmed by us, then we will issue the Service Credit to you within one billing cycle following the month in which your request is confirmed by us. Your failure to provide the requested and other information as required above will disqualify you from receiving a Service Credit.

AWS Transit Gateway Service SLA Exclusions

The respective SLAs do not apply to any unavailability, suspension or termination of Transit Gateway, or any other Transit Gateway performance issues, directly or indirectly: (i) caused by factors outside of our reasonable control, including any force majeure event or Internet access or related problems beyond the demarcation point of Transit Gateway; (ii) that result from any actions or inactions by you (e.g., misconfiguring Transit Gateway route tables, VPC security groups, VPC route tables, VPC configurations, or credential settings, etc.); (iii) that result from your equipment, software or other technology; (iv) that result from you not following the guidelines or exceeding the limitations described in the Transit Gateway Documentation on the AWS Site; or (v) arising from our suspension or termination of your right to use Transit Gateway in accordance with the Agreement (collectively, the “AWS Transit Gateway SLA Exclusions”). If availability is impacted by factors other than those used in our Monthly Uptime Percentage or Single TGW Uptime Percentage calculation, as applicable, then we may issue a Service Credit considering such factors at our discretion.

Definitions

• "Availability Zone" and “AZ” means an isolated location within an AWS region identified by a letter identifier following the AWS region code (e.g., us-west-1a).
• "Monthly Uptime Percentage" is calculated by subtracting from 100% the percentage of the monthly billing cycle in which the applicable Multi-AZ Transit Gateway was Unavailable. If the applicable Transit Gateway has only been configured for part of the month, the Transit Gateway is assumed to be 100% available for the portion of the month that it was not configured.
  
• A "Service Credit" is a dollar credit, calculated as set forth above, that we may credit back to an eligible account.
• “Single TGW Uptime Percentage” is calculated by subtracting from 100% the percentage of the monthly billing cycle in which the applicable Single Transit Gateway was Unavailable. If the applicable Single Transit Gateway has only been configured for part of the month, the Transit Gateway is assumed to be 100% available for the portion of the month that it was not configured.
• "Unavailable" or "Unavailability" mean
  
  • For the Multi-AZ Transit Gateway SLA, when all attempts to connect to and from a Virtual Private Cloud through a Multi-AZ Transit Gateway attachment fail for a period of greater than 60 consecutive seconds, despite those Multi-AZ Transit Gateway attachments being deployed in two or more Availability Zones.
  • For the Single Transit Gateway SLA, when all attempts to connect to and from a Virtual Private Cloud through a Single Transit Gateway attachment fail for a period of greater than 60 consecutive seconds.