Protocol Action: PPP over AAL2 to Proposed Standard
The IESG <iesg-secretary@ietf.org> Fri, 10 May 2002 20:55 UTC
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From: The IESG <iesg-secretary@ietf.org>
Subject: Protocol Action: PPP over AAL2 to Proposed Standard
Date: Fri, 10 May 2002 16:39:02 -0400
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The IESG has approved publication of the following Internet-Drafts as Proposed Standards: o PPP over AAL2 <draft-ietf-pppext-ppp-over-aal2-03.txt> o Class Extensions for PPP over AAL2 <draft-ietf-pppext-ppp-over-aal2-class-02.txt> These documents are the product of the Point-to-Point Protocol Extensions Working Group. The IESG contact persons are Erik Nordmark and Thomas Narten. Technical Summary PPP over AAL5 (RFC 2364) describes the encapsulation format and operation of PPP when used with the ATM AAL5 adaptation layer. While this encapsulation format is well suited to PPP transport of IP, it is bandwidth inefficient when used for transporting small payloads such as voice. PPP over AAL5 is especially bandwidth inefficient when used with RTP header compression (RFC 2508). 'PPP over AAL2' (draft-ietf-pppext-ppp-over-aal2-02.txt) addresses the bandwidth efficiency issues of 'PPP over AAL5' for small packet transport by making use of the AAL2 Common Part Sublayer (CPS) to allow multiple PPP payloads to be multiplexed into a set of ATM cells. In addition to bandwidth efficiency, real-time applications such as voice require low latency. RFC 2689, "Providing Integrated Services over Low-bitrate Links", describes an architecture for providing transport services for real time applications on low bit rate links. The main components of the architecture are: a real-time encapsulation format for asynchronous and synchronous low-bitrate links, a header compression architecture optimized for real-time flows, elements of negotiation protocols used between routers (or between hosts and routers), and announcement protocols used by applications to allow this negotiation to take place. 'Class Extensions for PPP over AAL2' (draft-ietf-pppext-ppp-over-aal2-class-01.txt) defines extensions to 'PPP over AAL2' that can be used to implement a fragment-oriented solution for the real-time encapsulation format part of the architecture described in RFC 2689. Working Group Summary There was support for these documents in the WG and no issues were raised during Last Call. Protocol Quality These documents have been reviewed for the IESG by Thomas Narten.