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Routes to ENI in VPC rt do not propagate to attached TGW rt

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I have a VPC attached to a TGW in same account. I've added a couple of entries to the VPCs route table with an ENI (or instance) as target. I expected those new routes to propagate to attached TGW's route table automatically but they don't.

Should the routes in VPC's RT propagate automatically o do I need to add appropriate entries in TGW's RT targeting the TGW-VPC attachment? What could I be doing wrong?

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Amazon VPCPasserelle de transit AWS
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demandé il y a 3 ans906 vues

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TGW route tables and VCP route tables are two separate route tables and you won't be able to propagate the VPC route table into the TGW route table, when you propagate a VPC attachment then you ONLY propagating the VPC CIDR into the TGW route table. Use static routes to add a specific route into TGW route table.

AWS

répondu il y a 3 ans

EXPERT

vérifié il y a 3 ans

  • Carlos
    il y a 3 ans

    I see, so I think don't understand propagations. Thanks for your help.

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