ISIS Extensions for BIER in Non-MPLS Networks
draft-dhanaraj-bier-isis-non-mpls-extensions-00
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Internet Engineering Task Force S. Dhanaraj, Ed.
Internet-Draft Huawei
Intended status: Standards Track IJ. Wijnands
Expires: May 27, 2019 P. Psenak
Cisco Systems, Inc.
G. Yan
J. Xie
Huawei
November 23, 2018
ISIS Extensions for BIER in Non-MPLS Networks
draft-dhanaraj-bier-isis-non-mpls-extensions-00
Abstract
Bit Index Explicit Replication (BIER) [RFC8279] is an architecture
that provides multicast forwarding through a "BIER domain" without
requiring intermediate routers to maintain multicast related per-flow
state. BIER can be supported in MPLS and non-MPLS networks. The
common BIER header format and encapsulation for MPLS and non-MPLS
networks is specified in [RFC8296].
BIER in Ethernet encapsulation is an example of BIER encapsulation in
non-MPLS networks.
[RFC8401] specifies the required extensions to the IS-IS [RFC1195]
protocol for the distribution of BIER sub-domain information
including the Sub-sub-TLV required to support BIER in MPLS
encapsulation for MPLS networks.
This document specifies the required extensions to the IS-IS
[RFC1195] protocol for supporting BIER in non-MPLS networks using
BIER in Ethernet encapsulation.
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
working documents as Internet-Drafts. The list of current Internet-
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
Dhanaraj, et al. Expires May 27, 2019 [Page 1]
Internet-Draft ISIS Extensions for BIER in Non-MPLS November 2018
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 27, 2019.
Copyright Notice
Copyright (c) 2018 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
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Requirements Language . . . . . . . . . . . . . . . . . . 4
3. Procedure and Packet Formats . . . . . . . . . . . . . . . . 4
3.1. BIER Ethernet Encapsulation Sub-sub TLV . . . . . . . . . 5
4. Security Considerations . . . . . . . . . . . . . . . . . . . 6
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
5.1. IS-IS sub-sub-TLVs for BIER Info sub-TLV Registry . . . . 7
6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 7
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.1. Normative References . . . . . . . . . . . . . . . . . . 7
7.2. Informative References . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction
Bit Index Explicit Replication (BIER) [RFC8279] is an architecture
that provides multicast forwarding through a "BIER domain" without
requiring intermediate routers to maintain multicast related per-flow
state. BIER can be supported in MPLS and non-MPLS networks. The
common BIER header format and encapsulation for MPLS and non-MPLS
networks is specified in [RFC8296].
As stated in [RFC8296], the encapsulation of Initial Four Octets in
BIER header for MPLS and non-MPLS networks are different. In
particular, the first 20-bits of the BIER header (referred as BIFT-
Dhanaraj, et al. Expires May 27, 2019 [Page 2]
Internet-Draft ISIS Extensions for BIER in Non-MPLS November 2018
id) is a "MPLS Label" in case of MPLS networks and is a "domain-wide-
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