draft-ietf-isis-te-app-15.txt   draft-ietf-isis-te-app-16.txt 
Networking Working Group L. Ginsberg Networking Working Group L. Ginsberg
Internet-Draft P. Psenak Internet-Draft P. Psenak
Intended status: Standards Track Cisco Systems Intended status: Standards Track Cisco Systems
Expires: December 13, 2020 S. Previdi Expires: December 17, 2020 S. Previdi
Huawei Huawei
W. Henderickx W. Henderickx
Nokia Nokia
J. Drake J. Drake
Juniper Networks Juniper Networks
June 11, 2020 June 15, 2020
IS-IS TE Attributes per application IS-IS TE Attributes per application
draft-ietf-isis-te-app-15 draft-ietf-isis-te-app-16
Abstract Abstract
Existing traffic engineering related link attribute advertisements Existing traffic engineering related link attribute advertisements
have been defined and are used in RSVP-TE deployments. Since the have been defined and are used in RSVP-TE deployments. Since the
original RSVP-TE use case was defined, additional applications (e.g., original RSVP-TE use case was defined, additional applications (e.g.,
Segment Routing Policy, Loop Free Alternate) that also make use of Segment Routing Policy, Loop Free Alternate) that also make use of
the link attribute advertisements have been defined . In cases where the link attribute advertisements have been defined . In cases where
multiple applications wish to make use of these link attributes, the multiple applications wish to make use of these link attributes, the
current advertisements do not support application specific values for current advertisements do not support application specific values for
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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-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on December 13, 2020. This Internet-Draft will expire on December 17, 2020.
Copyright Notice Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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sub-TLV of the Application Specific Link Attributes sub-TLV defined sub-TLV of the Application Specific Link Attributes sub-TLV defined
in this document, then the same numerical code should be assigned to in this document, then the same numerical code should be assigned to
the link attribute whenever possible. the link attribute whenever possible.
7.4. Link Attribute Application Identifier Registry 7.4. Link Attribute Application Identifier Registry
This document requests a new IANA registry be created, under the This document requests a new IANA registry be created, under the
category of "Interior Gateway Protocol (IGP) Parameters", to control category of "Interior Gateway Protocol (IGP) Parameters", to control
the assignment of Application Identifier Bits. The suggested name of the assignment of Application Identifier Bits. The suggested name of
the new registry is "Link Attribute Applications". The registration the new registry is "Link Attribute Applications". The registration
policy for this registry is "Standards Action" [RFC8126]. Bit policy for this registry is "Expert Review" [RFC8126]. Bit
definitions SHOULD be assigned in ascending bit order beginning with definitions SHOULD be assigned such that all bits in the lowest
Bit 0 so as to minimize the number of octets that will need to be available octet are allocated before assigning bits in the next
octet. This minimizes the number of octets that will need to be
transmitted. The following assignments are made by this document: transmitted. The following assignments are made by this document:
Bit # Name Bit # Name
--------------------------------------------------------- ---------------------------------------------------------
0 RSVP-TE (R-bit) 0 RSVP-TE (R-bit)
1 Segment Routing Policy (S-bit) 1 Segment Routing Policy (S-bit)
2 Loop Free Alternate (F-bit) 2 Loop Free Alternate (F-bit)
3-63 Unassigned 3-63 Unassigned
7.5. SRLG sub-TLVs 7.5. SRLG sub-TLVs
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