The IESG has received a request from the Hypertext Transfer Protocol WG (httpbis) to consider the following document: - 'CDN Loop Prevention' <draft-ietf-httpbis-cdn-loop-01.txt> as Proposed Standard 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 2018-12-11. 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 specification defines the CDN-Loop request header field for HTTP. The file can be obtained via https://datatracker.ietf.org/doc/draft-ietf-httpbis-cdn-loop/ IESG discussion can be tracked via https://datatracker.ietf.org/doc/draft-ietf-httpbis-cdn-loop/ballot/ No IPR declarations have been submitted directly on this I-D.