Support of Fragmentation of RADIUS Packets
RFC 7499
Document | Type | RFC - Experimental (April 2015; No errata) | |
---|---|---|---|
Authors | Alejandro Pérez-Méndez , Rafael Marin-Lopez , Fernando Pereniguez-Garcia , Gabriel Lopez-Millan , Diego Lopez , Alan DeKok | ||
Last updated | 2015-10-14 | ||
Replaces | draft-perez-radext-radius-fragmentation | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Stefan Winter | ||
Shepherd write-up | Show (last changed 2014-11-27) | ||
IESG | IESG state | RFC 7499 (Experimental) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Benoît Claise | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) A. Perez-Mendez, Ed. Request for Comments: 7499 R. Marin-Lopez Category: Experimental F. Pereniguez-Garcia ISSN: 2070-1721 G. Lopez-Millan University of Murcia D. Lopez Telefonica I+D A. DeKok Network RADIUS April 2015 Support of Fragmentation of RADIUS Packets Abstract The Remote Authentication Dial-In User Service (RADIUS) protocol is limited to a total packet size of 4096 bytes. Provisions exist for fragmenting large amounts of authentication data across multiple packets, via Access-Challenge packets. No similar provisions exist for fragmenting large amounts of authorization data. This document specifies how existing RADIUS mechanisms can be leveraged to provide that functionality. These mechanisms are largely compatible with existing implementations, and they are designed to be invisible to proxies and "fail-safe" to legacy RADIUS Clients and Servers. Status of This Memo This document is not an Internet Standards Track specification; it is published for examination, experimental implementation, and evaluation. This document defines an Experimental Protocol for the Internet community. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7499. Perez-Mendez, et al. Experimental [Page 1] RFC 7499 Fragmentation of RADIUS Packets April 2015 Copyright Notice Copyright (c) 2015 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 (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Perez-Mendez, et al. Experimental [Page 2] RFC 7499 Fragmentation of RADIUS Packets April 2015 Table of Contents 1. Introduction ....................................................4 1.1. Requirements Language ......................................6 2. Status of This Document .........................................6 3. Scope of This Document ..........................................7 4. Overview .......................................................10 5. Fragmentation of Packets .......................................13 5.1. Pre-Authorization .........................................14 5.2. Post-Authorization ........................................18 6. Chunk Size .....................................................21 7. Allowed Large Packet Size ......................................22 8. Handling Special Attributes ....................................23 8.1. Proxy-State Attribute .....................................23 8.2. State Attribute ...........................................24 8.3. Service-Type Attribute ....................................25 8.4. Rebuilding the Original Large Packet ......................25 9. New T Flag for the Long Extended Type Attribute Definition .....26 10. New Attribute Definition ......................................26 10.1. Frag-Status Attribute ....................................27 10.2. Proxy-State-Length Attribute .............................28 10.3. Table of Attributes ......................................29 11. Operation with Proxies ........................................29 11.1. Legacy Proxies ...........................................29 11.2. Updated Proxies ..........................................29 12. General Considerations ........................................31Show full document text