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  • Route Table Question

  • JordanP

    Member
    November 23, 2022 at 12:05 am

    Hello, and thank you for the great bank of questions!

    In the following question, I’m hoping someone could explain how a single route table would be able to achieve the desired outcome. The answer to this question states “Create a new route table for VPC A, with unique route entries for the two EC2 servers in VPC B and VPC C.”


    I do not understand how a single route table could work for this setup…You would need at least 2. The VPC peering connections are unique (with unique IDs) and must be referenced uniquely. You’d have x2 /32 routes to 10.0.0.10 in the same shared route table and that isn’t possible.

    I could only see this working with 2 unique route tables. x2 with 10.0.0.10/32 routes to VPC A and B accordingly.

    First sentence of question (for reference)

    <b style=”font-family: inherit; font-size: inherit;”>Category: ANS – Network Design

    A company is setting up a central Virtual Private Cloud named VPC A with one subnet and two VPC peering connections.

  • Carlo-TutorialsDojo

    Administrator
    November 24, 2022 at 1:23 am

    Hello JordanP,

    We appreciate your feedback.

    Yes, we can’t have two identical entries in a single RT, so there must be 2 RTs in the VPC A, each having an association with different subnets. Both RTs will contain destination routes to 10.0.0.0/16 with different peering targets.

    For example:

    VPC A -subnet1 RT:

    10.0.0.0/16 : pcx-aaabbb

    VPC A -subnet2 RT:

    10.0.0.0/16 : pcx-aaaccc

    We’ll improve the wording of the given answer.

    I hope this helps. Let me know if you have further questions.

    Regards,

    Carlo @ Tutorials Dojo

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