The IAB is ready to ask the RFC-Editor to publish Considerations on the use of a Service Identifier in Packet Headers draft-iab-service-id-considerations-01.txt as an Informational RFC. This document describes some considerations relating to the use of IP protocol number fields and payload protocol (e.g. TCP) port fields in protocols and deployed services. The IAB would like to ensure that the IETF community has had an opportunity to read it and comment before its publication. The IAB solicits comments by July 7, 2003. Please send comments to the IAB (iab@iab.org), or to ietf@ietf.org. The document can be found at http://www.ietf.org/internet-drafts/draft-iab-service-id-considerations-01.txt Abstract This memo describes some considerations relating to the use of IP protocol number fields and payload protocol (e.g. TCP) port fields to identify particular services that may be associated with that port number or protocol number. Leslie Daigle For the IAB