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there are official guides for AWS VPC networking and CLI here.<br />
<br />
<a href="http://docs.aws.amazon.com/AmazonVPC/latest/NetworkAdminGuide/Welcome.html" rel="ugc">http://docs.aws.amazon.com/AmazonVPC/latest/NetworkAdminGuide/Welcome.html</a><br />
<br />
<a href="http://docs.aws.amazon.com/cli/latest/" rel="ugc">http://docs.aws.amazon.com/cli/latest/</a><br />
<br />
but regarding general troubleshooting for routing issues in VPC, the traditional utilities such as PING and Trace Route can still help if you do so from an running instance.<br />
<br />
what's the symptom there?
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there are official guides for AWS VPC networking and CLI here.

http://docs.aws.amazon.com/AmazonVPC/latest/NetworkAdminGuide/Welcome.html [http://docs.aws.amazon.com/AmazonVPC/latest/NetworkAdminGuide/Welcome.html]

http://docs.aws.amazon.com/cli/latest/ [http://docs.aws.amazon.com/cli/latest/]

but regarding general troubleshooting for routing issues in VPC, the traditional utilities such as PING and Trace Route can still help if you do so from an running instance.

what's the symptom there?

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I have the security groups setup with subnets and ports to allow traffic, but seems they do not work or work sporadically only. &nbsp;I am trying to see the logs
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I have the security groups setup with subnets and ports to allow traffic, but seems they do not work or work sporadically only.  I am trying to see the logs

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<div class="content wysiwyg-content">
Having a routing issue with AWS VPC. &nbsp;Does anyone have information how to troubleshoot this, i.e. cli, or is there a good debugging tool?
</div>
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Having a routing issue with AWS VPC.  Does anyone have information how to troubleshoot this, i.e. cli, or is there a good debugging tool?

AWS Routing

Amazon Web Services (AWS), is a collection of remote computing services, also called web services, that make up a cloud-computing platform  operated from 11 geographical regions across the world. The most central and well-known of these services include Amazon Elastic Compute Cloud, also known as "EC2", and Amazon Simple Storage Service, also known as "S3". Other services include Elastic MapReduce (EMR), Route 53 (a DNS web service),  provides a highly available and scalable Domain Name System (DNS) web service, Virtual Private Cloud (VPC), storage, database, deployment and application services.

Cloud computing, also known as on-demand computing, is a kind of Internet-based computing where shared resources and information are provided to computers and other devices. It is a model for enabling ubiquitous, on-demand access to a shared pool of configurable computing resources. Cloud computing and storage solutions provide users and enterprises with various capabilities to store and process their data in third-party data centers, relying on sharing of resources to achieve coherence and economies of scale.

Cloud Computing

Network design and methodology, also known as network architecture, is the design of a communication network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats used in its operation. In telecommunication, the specification of a network architecture may also include a detailed description of products and services delivered via a communications network, as well as detailed rate and billing structures under which services are compensated.