The IESG has approved the following document: - 'IS-IS Prefix Attributes for Extended IP and IPv6 Reachability' (draft-ietf-isis-prefix-attributes-04.txt) as Proposed Standard This document is the product of the IS-IS for IP Internets Working Group. The IESG contact persons are Alvaro Retana, Alia Atlas and Deborah Brungard. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-isis-prefix-attributes/ Technical Summary This document introduces new sub-TLVs to support advertisement of prefix attribute flags and the source router ID of the router which originated a prefix advertisement. Working Group Summary There was no controversy in the WG over this draft. Document Quality There is good interest in the industry to implementing this standard. Personnel Shepherd: Christian Hopps. AD: Alia Atlas.