Application Specific Attributes Advertisement with BGP Link-State
draft-ietf-idr-bgp-ls-app-specific-attr-02
Inter-Domain Routing K. Talaulikar
Internet-Draft P. Psenak
Intended status: Standards Track Cisco Systems
Expires: November 19, 2020 J. Tantsura
Apstra
May 18, 2020
Application Specific Attributes Advertisement with BGP Link-State
draft-ietf-idr-bgp-ls-app-specific-attr-02
Abstract
Various link attributes have been defined in link-state routing
protocols like OSPF and IS-IS in the context of the MPLS Traffic
Engineering (TE) and GMPLS. BGP Link-State (BGP-LS) extensions have
been defined to distribute these attributes along with other topology
information from these link-state routing protocols. Many of these
link attributes can be used for applications other than MPLS TE or
GMPLS.
Extensions to link-state routing protocols have been defined for such
link attributes which enable distribution of their application
specific values. This document defines extensions to BGP-LS address-
family to enable advertisement of these application specific
attributes as a part of the topology information from the network.
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
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 November 19, 2020.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. Application Specific Link Attributes TLV . . . . . . . . . . 3
3. Application Specific Link Attributes . . . . . . . . . . . . 5
4. Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. Deployment Considerations . . . . . . . . . . . . . . . . . . 9
6. Backward Compatibility . . . . . . . . . . . . . . . . . . . 9
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
8. Manageability Considerations . . . . . . . . . . . . . . . . 10
8.1. Operational Considerations . . . . . . . . . . . . . . . 10
8.2. Management Considerations . . . . . . . . . . . . . . . . 10
9. Security Considerations . . . . . . . . . . . . . . . . . . . 10
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 11
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 11
11.1. Normative References . . . . . . . . . . . . . . . . . . 11
11.2. Informative References . . . . . . . . . . . . . . . . . 11
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
1. Introduction
Various link attributes have been defined in link-state routing
protocols (viz. IS-IS [RFC1195], OSPFv2 [RFC2328] and OSPFv3
[RFC5340] ) in the context of the MPLS traffic engineering and GMPLS.
All these attributes are distributed by these protocols using TLVs
that were originally defined for traditional MPLS Traffic Engineering
(i.e. using RSVP-TE [RFC3209]) or GMPLS [RFC4202] applications.
In recent years new applications have been introduced which have use
cases for many of the link attributes historically used by RSVP-TE
and GMPLS. Such applications include Segment Routing (SR) [RFC8402]
and Loop Free Alternates (LFA) [RFC5286]. This has introduced
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