The IESG has received a request from the DNS Extensions WG (dnsext) to consider the following document: - 'Extension Mechanisms for DNS (EDNS(0))' <draft-ietf-dnsext-rfc2671bis-edns0-09.txt> as Internet 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 2012-10-29. 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 The Domain Name System's wire protocol includes a number of fixed fields whose range has been or soon will be exhausted and does not allow requestors to advertise their capabilities to responders. This document describes backward compatible mechanisms for allowing the protocol to grow. This document updates the EDNS(0) specification (and obsoletes RFC 2671) based on feedback from deployment experience in several implementations. It also closes the IANA registry for extended labels created as part of RFC 2671 and obsoletes RFC 2673 ("Binary Labels in the Domain Name System") which depends on the existence of extended labels. This IETF Last Call is a second Last call for this document, to address process issues with the first Last Call. The document has been updated since the first Last Call to address comments received during the Last Call and during IESG review. The file can be obtained via http://datatracker.ietf.org/doc/draft-ietf-dnsext-rfc2671bis-edns0/ IESG discussion can be tracked via http://datatracker.ietf.org/doc/draft-ietf-dnsext-rfc2671bis-edns0/ballot/ No IPR declarations have been submitted directly on this I-D.