ENUM Implementation Issues and Experiences
RFC 5483
Document | Type | RFC - Informational (March 2009; No errata) | |
---|---|---|---|
Authors | Lawrence Conroy , Kazunori Fujiwara | ||
Last updated | 2015-10-14 | ||
Replaces | draft-conroy-enum-experiences | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5483 (Informational) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Jon Peterson | ||
Send notices to | (None) |
Network Working Group L. Conroy Request for Comments: 5483 RMRL Category: Informational K. Fujiwara JPRS March 2009 ENUM Implementation Issues and Experiences Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents in effect on the date of publication of this document (http://trustee.ietf.org/license-info). Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Abstract This document captures experiences in implementing systems based on the ENUM protocol and experiences of ENUM data that have been created by others. As such, it clarifies the ENUM and Dynamic Delegation Discovery System standards. Its aim is to help others by reporting both what is "out there" and potential pitfalls in interpreting the set of documents that specify the ENUM protocol. It does not revise the standards but is intended to provide technical input to future revisions of those documents. Conroy & Fujiwara Informational [Page 1] RFC 5483 ENUM Experiences March 2009 Table of Contents 1. Introduction ....................................................3 1.1. Document Goal ..............................................3 1.2. Terminology ................................................3 2. Character Sets and ENUM .........................................4 2.1. Character Sets - Non-ASCII Considered Harmful ..............4 2.1.1. Non-ASCII in the Regular Expression Field ...........5 2.1.2. Non-ASCII Support - Conclusions .....................6 2.2. Case Sensitivity ...........................................7 2.3. Regexp Field Delimiter .....................................7 2.4. Regexp Meta-Character Issue ................................8 3. Unsupported NAPTRs ..............................................8 3.1. Non-Compliant Client Behaviour .............................9 4. ENUM NAPTR Processing ..........................................10 4.1. Common Non-Compliant Client Behaviour .....................11 4.1.1. Example ............................................11 4.2. Order/Priority Values - Processing Sequence ...............12 4.3. Use of Order and Preference Fields ........................13 4.4. NAPTRs with Identical ORDER/PRIORITY Values ...............14 4.4.1. Compound NAPTRs and Implicit ORDER/REFERENCE Values .............................14 4.5. Processing Order Value across Domains .....................15 5. Non-Terminal NAPTR Processing ..................................16 5.1. Non-Terminal NAPTRs - Necessity ...........................16 5.2. Non-Terminal NAPTRs - Considerations ......................17 5.2.1. Non-Terminal NAPTRs - General ......................17 5.2.2. Non-Terminal NAPTRs - Loop Detection and Response ..17 5.2.3. Field Content in Non-Terminal NAPTRs ...............17 6. Backwards Compatibility ........................................20 6.1. Services Field Syntax .....................................20 7. Collected Implications for ENUM Provisioning ...................21 8. Collected Implications for ENUM Clients ........................23 8.1. Non-Terminal NAPTR Processing .............................25 9. Security Considerations ........................................26 10. Acknowledgements ..............................................27 11. References ....................................................27 11.1. Normative References .....................................27 11.2. Informative References ...................................29 Conroy & Fujiwara Informational [Page 2] RFC 5483 ENUM Experiences March 2009 1. Introduction 1.1. Document Goal The goal of this document is to clarify the ENUM and Dynamic Delegation Discovery System (DDDS) standards. It does not itself revise ENUM or DDDS standards but is intended to provide technical input to future revisions of those documents. It also serves to advise implementers on the pitfalls that they may find. ItShow full document text