I am the assigned Gen-ART reviewer for this draft. For background on Gen-ART, please see the FAQ at < http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>. Please resolve these comments along with any other Last Call comments you may receive. Document: draft-ietf-isis-rfc6326bis-01 Reviewer: Alexey Melnikov Review Date: 2014-01-20 IETF LC End Date: 2014-01-22 IESG Telechat date: 2014-01-23 Summary: This draft is nearly ready for publication as a standard track RFC. Major issues: None Minor issues: o Label: This carries the fine-grained label identifier for all subsequent MAC addresses in this sub-TLV, or the value zero if no label is specified. I fully admit ignorance of the topic, but what is exactly "fine-grained label" and where is the exact format defined? If it is defined later in the document, can you please add a forward reference. If it is defined in another document, can you please add a reference to that. In Sections 2.2.4 and 2.3.1: What are the requirements on backward compatibility between different versions of TRILL. Are TLVs formats supported for a version N also valid for version N+M? If you have any implied assumptions, please state them in the document. Nits/editorial comments: None