When containers are treated as disposable microservices that can be spawned quickly across a virtual or bare-metal infrastructure, it becomes a challenge to provide network connectivity to them.
No container will live without a network access; almost all large scale deployments will orchestrate containers that involve multiple tenants with specific demands around access and security. e.g. network isolation, egress firewall, load balancers, public IP address etc.
This presentation speaks about the problem space, and discusses current solutions being developed with a live demo of a solution from openshift (github.com/openshift/origin; github.com/openshift/openshift-sdn; kubernetes.io).