Hi all,
Comments are welcome.
GI-DS-lite [I-D.ietf-softwire-gateway-init-ds-lite] describes the use
of Gateway-Initiated softwire tunnels operating between the Gateway
and the Address Family Transition Router (AFTR) to conserve IPv4
addresses. Flows from multiple access devices (CPEs) can be
distinguished through use of Context Identifiers (CID). GI-DS-lite
describes an architecture where each CPE is a single device. It does
not cover the case where each CPE manages multiple hosts. This is
common in fixed network deployment and home network deployment over
air.
GI-DS-lite proposes few tunnel modes used for CID. One option is to
use Plain IP-in-IP. In this mode, a unique IPv4 address must be
assigned for each CPE from the gateway. As such, it does not support
CPEs using overlapped address. To support overlapped address space,
stateful tunnel (eg. GRE) is required between gateway and AFTR. It
is expensive to create one stateful tunnel per CPE especially in
fixed network non-mobility deployment.
DS-Extra-lite [I-D.arkko-dual-stack-extra-lite] describes that when
the CPE is connected to the gateway by point-to-point link rather
than shared media connection, it is unnecessary for the CID to be an
IP address. If another identifier with the required uniqueness
properties can be found (eg. VLAN and ATM PVC), the gateway can use
the per-interface identity to uniquely identify the CPE. This
relaxes the contraint of using CPE's IPv4 address for uniqueness.
This memo describes a framework to use the point-to-point identifier
and the IPv6 Flow Label [RFC3697] to create a unique binding in the
AFTR for CPEs using overlapped address space in the point-to-point
access network.
B. R.
Tina
http://tinatsou.weebly.com/contact.html
----- Original Message -----
From: "IETF I-D Submission Tool" <[email protected]>
To: <[email protected]>
Cc: <[email protected]>; <[email protected]>
Sent: Wednesday, June 02, 2010 8:50 AM
Subject: New Version Notification for draft-zhou-softwire-ds-lite-p2p-00
A new version of I-D, draft-zhou-softwire-ds-lite-p2p-00.txt has been
successfully submitted by Cathy Zhou and posted to the IETF repository.
Filename: draft-zhou-softwire-ds-lite-p2p
Revision: 00
Title: Deployment DS-lite in Point-to-Point Access Network
Creation_date: 2010-06-01
WG ID: Independent Submission
Number_of_pages: 9
Abstract:
Gateway-Initiated Dual-Stack lite (GI-DS-lite) is a proposal to
logically extend existing access tunnels beyond the access gateway to
AFTR using softwires with an embedded context identifier. This memo
describes a deployment model using GI-DS-lite in Point-to-Point
access network.
The IETF Secretariat.
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