I am the assigned Gen-ART reviewer for this draft. The General Area Review Team (Gen-ART) reviews all IETF documents being processed by the IESG for the IETF Chair. Please treat these comments just like any other last call comments. For more information, please see the FAQ at . Document: draft-ietf-mmusic-rfc8843bis-04 Reviewer: Ines Robles Review Date: 2021-08-09 IETF LC End Date: 2021-08-09 IESG Telechat date: Not scheduled for a telechat Summary: The document defines a new Session Description Protocol (SDP) Grouping Framework extension called 'BUNDLE'. The document obsoletes RFC8843 (published on Jan 2021) by removing the inconsistency between RFC 8843 and RFC8829. - The procedures regarding assigning the port value to a bundled "m=" section in an answer and instead use the same port for all bundled "m=" sections; some (initial or subsequent) and a subsequent offer were inconsistent. This specification removes the inconsistency by aligning the port value assignment procedure with the procedure in RFC 8829.- This specification updates also RFCs 3264, 5888, and 7941. Major issues: Not found Minor issues: Not found Nits/editorial comments: Not found Thanks for this document, Ines