I have a VPC, and when I click "Edit CIDRs" I see this:
…which looks great, 10.1.0.0/16
is exactly what I want for the CIDR block. However, when I add a new subnet to this VPC the route table for the subnet is automatically setup like this:
Note that's a 10.0
local route instead of the desired 10.1
. I have no idea how that found its way into our VPC but I cannot figure out a way to remove it (it's not removable when I click the "Edit" button on the top left in the screenshot), and if I can't I think my only option is to recreate the VPC which is going to be a major undertaking.
Is it possible to remove that route? I don't understand why it's not listed on the "Edit CIDRs" dialog if it's automatically going to be associated with any new subnets I create.
Best Answer
This entry is there because you have enabled ClassicLink for this VPC. The entry is correct, and it can't be removed, other than by disabling ClassicLink. This is the supernet for the private IP addresses in EC2-Classic.