BIER IPv6 Encapsulation (BIERv6) Support via IS-IS
draft-xie-bier-ipv6-isis-extension-02
Network Working Group J. Xie
Internet-Draft Huawei Technologies
Intended status: Standards Track A. Wang
Expires: April 30, 2021 China Telecom
G. Yan
S. Dhanaraj
X. Geng
Huawei Technologies
October 27, 2020
BIER IPv6 Encapsulation (BIERv6) Support via IS-IS
draft-xie-bier-ipv6-isis-extension-02
Abstract
This document defines IS-IS extensions to support multicast
forwarding using the Bit Index Explicit Replication (BIER) with IPv6
encapsulation (BIERv6).
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119] and
[RFC8174].
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 April 30, 2021.
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Copyright Notice
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document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Specification . . . . . . . . . . . . . . . . . . . . . . . . 3
3.1. Encapsulation sub-sub-TLV of End.BIER address . . . . . . 3
3.2. Encapsulation sub-sub-TLV of BIFT-id for each BSL . . . . 4
4. Security Considerations . . . . . . . . . . . . . . . . . . . 5
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
5.1. Encapsulation sub-sub-TLV Type Code . . . . . . . . . . . 5
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 5
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1. Normative References . . . . . . . . . . . . . . . . . . 5
7.2. Informative References . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
This document defines IS-IS extensions to support multicast
forwarding using the Bit Index Explicit Replication (BIER) with IPv6
encapsulation (BIERv6).
The BIER IPv6 encapsulation [I-D.xie-bier-ipv6-encapsulation] uses a
"BIER specific" IPv6 unicast address, the "End.BIER" address,
configured locally on a BIER Forwarding Router (BFR) to indicate a
"BIER specific handling" in Forwarding Information Base (FIB). This
BIER specific IPv6 address, used as part of BIER IPv6 encapsulation,
is advertised as a type of Encapsulation sub-sub-TLV within the BIER
Info sub-TLV defined [RFC8401].
The BIFT-id field for each BSL of each Sub-domain is another part of
BIER IPv6 encapsulation, and is advertised as a type of Encapsulation
sub-sub-TLV within the BIER Info sub-TLV defined [RFC8401].
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The BIER Sub-TLV is advertised within the extended IP reachability
TLV as specified by in [RFC8401].
Note the extended IP reachability only includes the TLV 236 (IPv6 IP
Reach TLV) [RFC5308] and TLV 237 (MT IPv6 IP Reach TLVs) [RFC5120] in
this document.
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