OpenStack Neutron How to Write CLI and API Extensions

Writing CLI commands for NeutronClient on Openstack
http://control-that-vm.blogspot.in/2014/06/writing-cli-commands-for-neutronclient.html

Writing API Extensions in Neutron for Openstack
http://control-that-vm.blogspot.in/2014/05/writing-api-extensions-in-neutron.html

Neutron Project Specifications
http://specs.openstack.org/openstack/neutron-specs/index.html