ANS-C01 Question 140
Select 3You are designing a hybrid network architecture connecting your on-premises data center to AWS using AWS Direct Connect. To optimize performance and ensure high availability, you plan to implement Link Aggregation Groups (LAG) and use VLAN tagging for traffic segmentation. Which of the following considerations are true when configuring LAG and VLANs for this setup?
- A
LAG groups can aggregate multiple physical connections into a single logical connection to increase bandwidth and provide redundancy.
- B
Jumbo frames must be explicitly enabled on both the AWS side and the on-premises side for end-to-end compatibility.
- C
VLAN tagging is not required when using AWS Direct Connect as AWS automatically segments traffic.
- D
All connections in a LAG group must have the same bandwidth and connect to the same AWS Direct Connect endpoint.
- E
LAG requires the use of optical connections with a minimum bandwidth of 10 Gbps per connection.
Show answer and explanation
Correct answers: A, B, D
Explanation
When configuring AWS Direct Connect with LAG and VLAN tagging, it's important to understand the key requirements. LAG aggregates multiple connections for higher bandwidth and redundancy, and all connections in a LAG group must have the same bandwidth and terminate at the same endpoint. VLAN tagging is necessary to logically segment traffic over Direct Connect. Additionally, for optimal performance, features like jumbo frames (MTU 9001) must be enabled consistently across both the AWS and on-premises sides.
- A. Correct.
Correct: LAG enables aggregation of multiple physical links into one logical link, improving bandwidth and providing redundancy.
- B. Correct.
Correct: Jumbo frames (MTU 9001) must be configured on both ends to be effective, ensuring consistency across the connection.
- C. Incorrect.
Incorrect: VLAN tagging is required to segment traffic, even when using AWS Direct Connect, as AWS does not automatically manage traffic segmentation.
- D. Correct.
Correct: AWS Direct Connect requires all connections in a LAG group to have the same bandwidth and terminate at the same endpoint for proper configuration.
- E. Incorrect.
Incorrect: LAG does not mandate the use of optical connections or a minimum of 10 Gbps connections. LAG can be implemented with lower bandwidths (e.g., 1 Gbps).