The IESG has received a request from the Open Shortest Path First IGP WG (ospf) to consider the following document: - 'OSPF Topology-Transparent Zone' <draft-ietf-ospf-ttz-05.txt> as Experimental RFC The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2017-01-03. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. Abstract This document presents a topology-transparent zone in an OSPF area. A topology-transparent zone comprises a group of routers and a number of links connecting these routers. Any router outside of the zone is not aware of the zone. The information about the links and routers such as a link down inside the zone is not advertised to any router outside of the zone. The file can be obtained via https://datatracker.ietf.org/doc/draft-ietf-ospf-ttz/ IESG discussion can be tracked via https://datatracker.ietf.org/doc/draft-ietf-ospf-ttz/ballot/ The following IPR Declarations may be related to this I-D: https://datatracker.ietf.org/ipr/1721/ https://datatracker.ietf.org/ipr/2701/