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I do not have classic link enable for my vpc may be we had earlier but there is an entry(10.0.0.0/8) in my vpc route table and there is no option to remove it .how can i remove it .

Deepanshu Gaur
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    Route tables are associated with a subnet not a VPC. What is your VPC CIDR? 10.0.0.0/8 is way too large. Can you post a screenshot of your subnet route table? – helloV May 01 '18 at 17:31

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There is a default entry in every Route Table that is mapped to the CIDR of the whole VPC. It is routed to local, which means that all subnets in the VPC can communicate with each other. It is not possible to remove this entry.

VPC Route Table

If you do not wish some subnets to communicate with each other (which is common in a DMZ scenario, you can use Network ACLs to deny traffic within certain CIDR ranges (eg particular subnets).

John Rotenstein
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The issue will be due to classic link enabled on VPC, try disabling the same which should avoid this issue.

Gopalakrishnan Balasubramanian
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