BIER IPv6 Requirements
draft-ietf-bier-ipv6-requirements-03
Network Working Group M. McBride
Internet-Draft Futurewei
Intended status: Standards Track J. Xie
Expires: May 5, 2020 S. Dhanaraj
Huawei
R. Asati
Cisco
November 2, 2019
BIER IPv6 Requirements
draft-ietf-bier-ipv6-requirements-03
Abstract
The BIER WG includes, in its charter, work on developing mechanisms
to transport BIER natively in IPv6. This document is intended to
help the WG with this effort by specifying requirements for
transporting packets, with Bit Index Explicit Replication (BIER)
headers, in an IPv6 environment. There will be a need to send IPv6
payloads, to multiple IPv6 destinations, using BIER. There have been
several proposed solutions in this area. But there hasn't been a
document which describes the problem and lists the requirements. The
goal of this document is to describe the BIER IPv6 requirements,
summarize the proposed solutions, and guide the working group in
understanding the benefits, and drawbacks, of the various solutions
and to help in the development of acceptable solutions.
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
Task Force (IETF). Note that other groups may also distribute
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Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
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 May 5, 2020.
McBride, et al. Expires May 5, 2020 [Page 1]
Internet-Draft BIER IPv6 Requirements November 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 3
3. BIER IPv6 Scenario's . . . . . . . . . . . . . . . . . . . . 4
3.1. BIERv6 for Access Network . . . . . . . . . . . . . . . . 4
3.2. BIERv6 for Data Center . . . . . . . . . . . . . . . . . 4
3.3. BIERv6 for Core Networks . . . . . . . . . . . . . . . . 5
3.4. Implications for BIER in SRv6 . . . . . . . . . . . . . . 5
4. Requirements . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1. L2 Agnostic . . . . . . . . . . . . . . . . . . . . . . . 5
4.2. Hop by hop SA or DA modification . . . . . . . . . . . . 5
4.3. L4 Inspection . . . . . . . . . . . . . . . . . . . . . . 6
4.4. Multicast address in SA field . . . . . . . . . . . . . . 7
4.5. Incorrect bits . . . . . . . . . . . . . . . . . . . . . 7
4.6. SA filtering . . . . . . . . . . . . . . . . . . . . . . 7
4.7. BIER architecture support . . . . . . . . . . . . . . . . 7
4.8. Simple Encapsulation . . . . . . . . . . . . . . . . . . 8
4.9. Hardware fast path . . . . . . . . . . . . . . . . . . . 8
4.10. Conform to existing IPv6 Spec . . . . . . . . . . . . . . 8
4.11. Support Fragmentation . . . . . . . . . . . . . . . . . . 8
4.12. Support IPv6 Security . . . . . . . . . . . . . . . . . . 8
5. Solutions Evaluation . . . . . . . . . . . . . . . . . . . . 8
5.1. BIER-ETH encapsulation in IPv6 networks . . . . . . . . . 9
5.2. Encode Bitstring in IPv6 destination address . . . . . . 10
5.3. Add BIER header into IPv6 Extension Header . . . . . . . 10
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