AWS - HowTo - How to use VPC Reachability Analyzer between resources

 

In this blog, let us see an easy way of finding the reachability analysis between VPC resources to an AWS Instance

Pre-requisite:

• An active AWS account
• Permissions to use AWS VPC Management console
• A working VPC and an Instance launched in that VPC

Steps:

• Login & navigate the AWS VPC Management Console
• Ensure that a VPC exists(even a default VPC is fine) and that an AWS EC2 in that VPC is created, up & running(even free-tier will do)
• Now click on the "Reachability Analyzer" option under "Reachability" menu from the side bar o the VPC management console
• click on "Create and Analyze Path" from the top right side of the console, in order to create, configure an analysis path between VPC resources
• Now select the source & destinations from the drop down options listed as below

• Find the analysis of reachability path being generated

• On completion, there is a path that is drafted from the source to destination resources, Internet Gateway to EC2 Instance in this example, and results of whether it could be reached from IGW -> EC2 is clearly established 

Note:

• Though it might be look simple, this will be helpful in identifying the bottlenecks in network reachability issues