Using RPI Option Type, Routing Header for Source Routes and IPv6-in-IPv6 encapsulation in the RPL Data Plane
draft-ietf-roll-useofrplinfo-35
ROLL Working Group M. Robles
Internet-Draft UTN-FRM/Aalto
Updates: 6553, 6550, 8138 (if approved) M. Richardson
Intended status: Standards Track SSW
Expires: August 15, 2020 P. Thubert
Cisco
February 12, 2020
Using RPI Option Type, Routing Header for Source Routes and IPv6-in-IPv6
encapsulation in the RPL Data Plane
draft-ietf-roll-useofrplinfo-35
Abstract
This document looks at different data flows through LLN (Low-Power
and Lossy Networks) where RPL (IPv6 Routing Protocol for Low-Power
and Lossy Networks) is used to establish routing. The document
enumerates the cases where RFC6553 (RPI Option Type), RFC6554
(Routing Header for Source Routes) and IPv6-in-IPv6 encapsulation is
required in data plane. This analysis provides the basis on which to
design efficient compression of these headers. This document updates
RFC6553 adding a change to the RPI Option Type. Additionally, this
document updates RFC6550 defining a flag in the DIO Configuration
Option to indicate about this change and updates RFC8138 as well to
consider the new Option Type when the RPL Option is decompressed.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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Task Force (IETF). Note that other groups may also distribute
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time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 15, 2020.
Robles, et al. Expires August 15, 2020 [Page 1]
Internet-Draft RPL-data-plane February 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Terminology and Requirements Language . . . . . . . . . . . . 5
3. RPL Overview . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Updates to RFC6553, RFC6550 and RFC8138 . . . . . . . . . . . 7
4.1. Updates to RFC6550: Advertising External Routes with Non-
Storing Mode Signaling. . . . . . . . . . . . . . . . . . 7
4.2. Updates to RFC6553: Indicating the new RPI Option Type. . 8
4.3. Updates to RFC6550: Indicating the new RPI in the
DODAG Configuration Option Flag. . . . . . . . . . . . . 11
4.4. Updates to RFC8138: Indicating the way to decompress with
the new RPI Option Type. . . . . . . . . . . . . . . . . 13
5. Sample/reference topology . . . . . . . . . . . . . . . . . . 14
6. Use cases . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7. Storing mode . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1. Storing Mode: Interaction between Leaf and Root . . . . . 20
7.1.1. SM: Example of Flow from RAL to root . . . . . . . . 20
7.1.2. SM: Example of Flow from root to RAL . . . . . . . . 21
7.1.3. SM: Example of Flow from root to RUL . . . . . . . . 22
7.1.4. SM: Example of Flow from RUL to root . . . . . . . . 22
7.2. SM: Interaction between Leaf and Internet. . . . . . . . 23
7.2.1. SM: Example of Flow from RAL to Internet . . . . . . 23
7.2.2. SM: Example of Flow from Internet to RAL . . . . . . 24
7.2.3. SM: Example of Flow from RUL to Internet . . . . . . 25
7.2.4. SM: Example of Flow from Internet to RUL. . . . . . . 26
7.3. SM: Interaction between Leaf and Leaf . . . . . . . . . . 27
7.3.1. SM: Example of Flow from RAL to RAL . . . . . . . . . 27
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