I have been selected as the Routing Directorate reviewer for this draft. The Routing Directorate seeks to review all routing or routing-related drafts as they pass through IETF last call and IESG review, and sometimes on special request. The purpose of the review is to provide assistance to the Routing ADs. For more information about the Routing Directorate, please see ​http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir Although these comments are primarily for the use of the Routing ADs, it would be helpful if you could consider them along with any other IETF Last Call comments that you receive, and strive to resolve them through discussion or by updating the draft. Document: draft-ietf-ccamp-wson-yang-25.txt Reviewer: Lou Berger Review Date: July 12, 2020 IETF LC End Date: date-if-known Intended Status: Proposed Standard Summary: I have a minor concern about this document that I think should be resolved before publication. Comments: This seems to be a straight forward YANG model that augments draft-ietf-teas-yang-te-topo with basic WSON information.  I think it may be hard for those not intimate with optical switching, and TE to follow, but no so for those working with these technologies.  I have one question/issue that I think that should be resolved before publication. Major Issues: None Minor Issues: I may be missing something, but it seems to me that there are number of elements/leaves marked rw that should be ro.  For example are  reconfigurable-node or grid-type really going to be writable?  If I understand the model correctly, there will be some cases there leaves under grid type will be writable -- in this case shouldn't the grid-type case  statements be limited to the label-restriction/grid-type? Again, please let me know if I'm missing something. Nit: I'm marking this comment as a nit as it is somewhat stylistic. I'm not a fan of defining groupings that are unlikely to be reused.  'grouping wson-node-attributes' is used once - I suggest just moving the container (or even just the leaf) to the one place it is used in the model. I also note that the YANGdoctor review comments are out of date and should be revisited. That's it! Lou