What is the VPC subnet route priority when two targets have the same default 0.0.0.0/0 route as the destination?

Question

If a public subnet has an attached route table with the following routes:
| Destination | Target |
| --- | --- |
| 0.0.0.0/0 | nat-gateway-id |
| 0.0.0.0/0 | igw-gateway-id |

Which entry will take priority?. Is order considered in such case?

Accepted Answer

In a VPC route table, you cannot have two targets with static routes for the same destination network. For example, the subnet route table already has a default route 0.0.0.0/0 pointing to  and if you try to add another default route 0.0.0.0/0 pointing to  in the same route table, will result in the error message: "The route identified by 0.0.0.0/0 already exists."

What is the VPC subnet route priority when two targets have the same default 0.0.0.0/0 route as the destination?

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