Deployment Considerations for Lightweight 4over6
draft-ietf-softwire-lightweight-4over6-deployment-00
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Network Working Group Q. Sun
Internet-Draft C. Xie
Intended status: Informational China Telecom
Expires: July 29, 2017 Y. Lee
Comcast
M. Chen
FreeBit
T. Li
Tsinghua University
January 25, 2017
Deployment Considerations for Lightweight 4over6
draft-ietf-softwire-lightweight-4over6-deployment-00
Abstract
Lightweight 4over6 is a mechanism which moves the translation
function from tunnel lwAFTR (AFTR) to lwB4s (B4s), and hence reduces
the mapping scale on the lwAFTR to per-customer level. This document
discusses various deployment models of Lightweight 4over6. It also
describes the deployment considerations and applicability of the
Lightweight 4over6 architecture.
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on July 29, 2017.
Copyright Notice
Copyright (c) 2017 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
Sun, et al. Expires July 29, 2017 [Page 1]
Internet-Draft lightweigh-4over6-deployment January 2017
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Deployment Model . . . . . . . . . . . . . . . . . . . . . . . 4
3. Overall Deployment Considerations . . . . . . . . . . . . . . 6
3.1. Addressing and Routing . . . . . . . . . . . . . . . . . . 6
3.2. Port-set Management . . . . . . . . . . . . . . . . . . . 6
3.3. lwAFTR Discovery . . . . . . . . . . . . . . . . . . . . . 7
3.4. Impacts on Accouting . . . . . . . . . . . . . . . . . . . 7
4. lwAFTR Deployment Consideration . . . . . . . . . . . . . . . 8
4.1. Logging at the lwAFTR . . . . . . . . . . . . . . . . . . 8
4.2. MTU and Fragmentation Considerations . . . . . . . . . . . 8
4.3. Reliability Considerations of lwAFTR . . . . . . . . . . . 8
4.4. Placement of AFTR . . . . . . . . . . . . . . . . . . . . 9
4.5. Port set algorithm consideration . . . . . . . . . . . . . 9
4.6. Path Consistency Consideration . . . . . . . . . . . . . . 9
5. lwB4 Deployment Consideration . . . . . . . . . . . . . . . . 11
5.1. NAT traversal issue . . . . . . . . . . . . . . . . . . . 11
5.2. Static Port Forwarding Configuration . . . . . . . . . . . 11
6. DS-Lite Compatibility Consideration . . . . . . . . . . . . . 12
6.1. Case 1: Integrated Network Element with Lightweight
4over6 and DS-Lite AFTR Scenario . . . . . . . . . . . . . 12
6.2. Case 2: DS-Lite Coexistent scenario with Separated AFTR . 13
7. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 14
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Appendix 1. China Telecom Experimental Result . . . . . . . . . . 18
1.1. Experimental Environment . . . . . . . . . . . . . . . . . 18
1.2. Experimental Results . . . . . . . . . . . . . . . . . . . 19
1.3. Conclusions . . . . . . . . . . . . . . . . . . . . . . . 20
Appendix 2. Tsinghua University Experimental Result . . . . . . . 21
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