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How would you design routing to meet the above requirements?

You are designing the network infrastructure for an application server in Amazon VPC Users will access all the
application instances from the Internet as well as from an on-premises network The on-premises network is
connected to your VPC over an AWS Direct Connect link.
How would you design routing to meet the above requirements?

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A.
Configure a single routing Table with a default route via the Internet gateway Propagate a default route via
BGP on the AWS Direct Connect customer router Associate the routing table with all VPC subnets.

B.
Configure a single routing table with a default route via the internet gateway Propagate specific routes for
the on-premises networks via BGP on the AWS Direct Connect customer router Associate the routing table
with all VPC subnets.

C.
Configure a single routing table with two default routes: one to the internet via an Internet gateway the
other to the on-premises network via the VPN gateway use this routing table across all subnets in your VPC.

D.
Configure two routing tables one that has a default route via the Internet gateway and another that has a
default route via the VPN gateway Associate both routing tables with each VPC subnet.

14 Comments on “How would you design routing to meet the above requirements?

    1. mutiger91 says:

      Isn’t the issue with A that you are then back-hauling all of your internet traffic over your DirectConnect to the internet service in your data center?




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  1. Artur says:

    B) is the right answer because def. route must be set to Inet GW to reach ANY Inet destinations and specific routes propagatin via BGP to learn on-premises router which AWS subnets are available via AWS DC link.




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  2. DaDA says:

    Configure a single routing table with a default route via the internet gateway Propagate specific routes for the on-premises networks via BGP on the AWS Direct Connect customer router Associate the routing table with all VPC subnets.




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