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Packet Flow

 

In order to illustrate the detail packet flow in this Contrail Kubernetes environment, let’s examine the end-to-end HTTP request from the external Internet host to the destination pod in our Ingress lab setup. We’ll examine the forwarding state step-by-step: starting from the Internet host, through the gateway router, then through the active haproxy, backend service, and to the final destination pod.

Note

Understanding packet flow will enable you to troubleshoot any future forwarding plane issues.