ANS-C01 Question 354
Single answerYou are designing a hybrid network that connects an on-premises data center to multiple AWS VPCs using AWS Transit Gateway. During testing, you notice routing issues when attempting to communicate between two VPCs through the Transit Gateway. Upon investigation, you discover that the Transit Gateway route table has reached its limit. What would be the BEST approach to resolve this issue?
- A
Increase the Transit Gateway route table limit by submitting a support ticket to AWS.
- B
Consolidate overlapping routes in the Transit Gateway route table to reduce the number of entries.
- C
Add another Transit Gateway to your architecture and distribute route table entries between the two Transit Gateways.
- D
Use AWS Direct Connect instead of the Transit Gateway to bypass the route table limits.
Show answer and explanation
Correct answer: B
Explanation
The AWS Transit Gateway route table has a limit on the number of routes it can store. When this limit is reached, communication between resources through the Transit Gateway may fail. The best solution is to consolidate overlapping or redundant routes to ensure efficient use of the available route table entries, rather than attempting to bypass the limit or introducing unnecessary complexity into the architecture.
- A. Incorrect.
You cannot increase the Transit Gateway route table limit beyond its maximum quota, even with a support ticket. This option is incorrect.
- B. Correct.
Consolidating overlapping routes in the Transit Gateway route table is a viable solution because it allows you to optimize the use of routing entries without exceeding the limit. This is the correct answer.
- C. Incorrect.
Adding another Transit Gateway may work in some scenarios, but it introduces significant complexity in managing routing and connectivity, especially for hybrid architectures. It is not the best approach.
- D. Incorrect.
AWS Direct Connect is used for dedicated network connectivity between on-premises environments and AWS, but it does not solve the Transit Gateway route table limit issue. This option is unrelated to the problem.