Number of LOAs for Adding Connections to LAGs
Question
Your company has a highly available Direct Connect solution that utilizes two datacenters.
Each data center contains one two-connection LAG and one standard DX connection.
How many LOAs will be filled out in total if your company completes an order to add a new connection to each one of the LAGs?
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.Answer - B.
AWS documentation and LOA is used for DX, interconnect and Link Aggregation Group.
https://docs.aws.amazon.com/cli/latest/reference/directconnect/describe-loa.htmlSo in this example each data centre would have 2 LOAs (1 DX and 1 LAG) = 4 and adding more connection to the LAGs will not increase the number of LOAs.
The AWS documentation mentions the following on link aggregation group
When you create a LAG, you can download the Letter of Authorization and Connecting Facility Assignment (LOA-CFA) for each new physical connection individually from the AWS Direct Connect console.
For more information on link aggregation group , please refer to the below link.
http://docs.aws.amazon.com/directconnect/latest/UserGuide/lags.htmlTo understand the answer to this question, let's first define some key terms:
Direct Connect (DX): A service provided by AWS that allows customers to establish a dedicated network connection from their on-premises data center to AWS.
LAG (Link Aggregation Group): A feature that allows multiple physical connections between a customer's on-premises data center and AWS to be bundled together into a single logical connection. This can increase the overall bandwidth and reliability of the connection.
LOA (Letter of Authorization): A document provided by AWS that specifies the configuration details for a Direct Connect connection, including the location, speed, and virtual interface (VIF) ID.
Now, let's examine the scenario described in the question. The company has two data centers, each of which contains one two-connection LAG and one standard DX connection. This means that there are four physical connections in total (two in each data center), which are logically grouped together into two LAG connections.
The question asks how many LOAs will be filled out if the company completes an order to add a new connection to each one of the LAGs. Adding a new connection to a LAG requires updating the configuration details for the LAG as a whole, rather than for each individual physical connection.
Therefore, the answer is simply one LOA for each data center, for a total of two LOAs. Option A, which indicates one LOA, is the correct answer. Options B, C, and D are incorrect.
