This draft and YANG modules contained therein fit into the framework of I2RS network topology models. I have no substantial comments, from the YANG point of view this document is ready to be published. Comments and questions: 1. What is the purpose of the 'flag-type' type and 'flag-identity' identity? There are no identities derived from the latter. 2. Some descriptions overuse capitalization. For example, instead of 'VLAN Name' I would suggest 'VLAN name'. 3. An example of an instance document in an appendix would be very helpful.