draft-ietf-idr-eag-distribution-10.txt   draft-ietf-idr-eag-distribution-11.txt 
IDR Working Group Z. Wang IDR Working Group Z. Wang
Internet-Draft Q. Wu Internet-Draft Q. Wu
Intended status: Standards Track Huawei Intended status: Standards Track Huawei
Expires: May 24, 2020 J. Tantsura Expires: May 24, 2020 J. Tantsura
Apstra, Inc. Apstra, Inc.
K. Talaulikar K. Talaulikar
Cisco Systems Cisco Systems
November 21, 2019 November 21, 2019
Distribution of MPLS-TE Extended admin Group Using BGP-LS Distribution of Traffic Engineering Extended Admin Groups using BGP-LS
draft-ietf-idr-eag-distribution-10 draft-ietf-idr-eag-distribution-11
Abstract Abstract
Administrative groups (commonly referred to as "colors" or "link Administrative groups (commonly referred to as "colors" or "link
colors") are link attributes that are advertised by link state colors") are link attributes that are advertised by link state
protocols like IS-IS (Intermediate System to Intermediate System) and protocols like IS-IS (Intermediate System to Intermediate System) and
OSPF (Open Shortest Path First) and used for traffic engineering. OSPF (Open Shortest Path First) and used for traffic engineering.
These administrative groups have initially been defined as a fixed- These administrative groups have initially been defined as a fixed-
length 32-bit bitmask. As networks grew and more use-cases were length 32-bit bitmask. As networks grew and more use-cases were
introduced, the 32-bit length was found to be constraining and hence introduced, the 32-bit length was found to be constraining and hence
extended administrative groups were introduced in the link state extended administrative groups were introduced in the link state
protocols. The 32-bit administrative groups are already advertised protocols. The 32-bit administrative groups are already advertised
as link attributes in BGP-LS. This document introduces extensions to as link attributes in BGP-LS (Border Gateway Protocol Link-State).
BGP-LS (Border Gateway Protocol Link-State) for advertisement of the This document defines extensions to BGP-LS for advertisement of the
extended administrative groups. extended administrative groups.
Status of This Memo Status of This Memo
This Internet-Draft is submitted in full conformance with the This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
skipping to change at page 3, line 52 skipping to change at page 3, line 52
o Type: 1173 o Type: 1173
o Length: variable (MUST be multiple of 4); represents the total o Length: variable (MUST be multiple of 4); represents the total
length of the value field in octets. length of the value field in octets.
o Value : one or more sets of 32-bit bitmasks that indicate the o Value : one or more sets of 32-bit bitmasks that indicate the
administrative groups (colors) that are enable on the link when administrative groups (colors) that are enable on the link when
those specific bits are set. those specific bits are set.
The EAG TLV is an optional TLV. The existing AG TLV 108 and the EAG The EAG TLV is an optional TLV. The existing AG TLV 108 and the EAG
TLV introduced in this document MAY be advertised together. The TLV defined in this document MAY be advertised together. The
semantics of the EAG and the backward compatibility aspects of EAG semantics of the EAG and the backward compatibility aspects of EAG
with respect to the AG are handled as described in the Backward with respect to the AG are handled as described in the Backward
Compatibility section of [RFC7308]. Compatibility section of [RFC7308].
3. IANA Considerations 3. IANA Considerations
This document requests assigning code-point from the registry "BGP-LS This document requests assigning code-point from the registry "BGP-LS
Node Descriptor, Link Descriptor, Prefix Descriptor, and Attribute Node Descriptor, Link Descriptor, Prefix Descriptor, and Attribute
TLVs" based on table below. Early allocation for these code-points TLVs" based on table below. Early allocation for these code-points
have been done by IANA. have been done by IANA.
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