BIER IPv6 Requirements
draft-ietf-bier-ipv6-requirements-01
Network Working Group M. McBride
Internet-Draft Futurewei
Intended status: Standards Track J. Xie
Expires: January 2, 2020 S. Dhanaraj
Huawei
R. Asati
Cisco
July 1, 2019
BIER IPv6 Requirements
draft-ietf-bier-ipv6-requirements-01
Abstract
The BIER WG has a charter item to work on mechanisms which use 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 and summarize the pro's and con's
of the proposed solutions.
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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This Internet-Draft will expire on January 2, 2020.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
McBride, et al. Expires January 2, 2020 [Page 1]
Internet-Draft BIER IPv6 Requirements July 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 3
3. BIER IPv6 Scenario's . . . . . . . . . . . . . . . . . . . . 3
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 DA modification . . . . . . . . . . . . . . . 5
4.3. L4 Inspection . . . . . . . . . . . . . . . . . . . . . . 6
4.4. Multicast address in SA field . . . . . . . . . . . . . . 6
4.5. Incorrect bits . . . . . . . . . . . . . . . . . . . . . 6
4.6. SA filtering . . . . . . . . . . . . . . . . . . . . . . 6
4.7. BIER architecture support . . . . . . . . . . . . . . . . 6
4.8. Keep it simple . . . . . . . . . . . . . . . . . . . . . 7
4.9. Hardware fast path . . . . . . . . . . . . . . . . . . . 7
5. Solutions Evaluation . . . . . . . . . . . . . . . . . . . . 7
5.1. BIER-ETH encapsulation in IPv6 networks . . . . . . . . . 7
5.2. Encode Bitstring in IPv6 destination address . . . . . . 8
5.3. Add BIER header into IPv6 Extension Header . . . . . . . 9
5.4. Transport BIER as IPv6 payload . . . . . . . . . . . . . 10
5.5. Tunneling BIER in a IPv6 tunnel . . . . . . . . . . . . . 10
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
7. Security Considerations . . . . . . . . . . . . . . . . . . . 11
8. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 11
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