draft-ietf-lsr-ip-flexalgo-01.txt   draft-ietf-lsr-ip-flexalgo-02.txt 
LSR Working Group W. Britto LSR Working Group W. Britto
Internet-Draft S. Hegde Internet-Draft S. Hegde
Intended status: Standards Track P. Kaneriya Intended status: Standards Track P. Kaneriya
Expires: October 29, 2021 R. Shetty Expires: October 30, 2021 R. Shetty
R. Bonica R. Bonica
Juniper Networks Juniper Networks
P. Psenak P. Psenak
Cisco Systems Cisco Systems
April 27, 2021 April 28, 2021
IGP Flexible Algorithms (Flex-Algorithm) In IP Networks IGP Flexible Algorithms (Flex-Algorithm) In IP Networks
draft-ietf-lsr-ip-flexalgo-01 draft-ietf-lsr-ip-flexalgo-02
Abstract Abstract
An IGP Flexible Algorithm (Flex-Algorithm) allows IGP to compute An IGP Flexible Algorithm (Flex-Algorithm) allows IGP to compute
constraint-based paths. As currently defined, IGP Flex-Algorithm is constraint-based paths. As currently defined, IGP Flex-Algorithm is
used with Segment Routing (SR) data planes - SR MPLS and SRv6. used with Segment Routing (SR) data planes - SR MPLS and SRv6.
Therefore, Flex-Algorithm cannot be deployed in the absence of SR. Therefore, Flex-Algorithm cannot be deployed in the absence of SR.
This document extends IGP Flex-Algorithm, so that it can be used for This document extends IGP Flex-Algorithm, so that it can be used for
regular IPv4 and IPv6 prefixes. This allows Flex-Algorithm to be regular IPv4 and IPv6 prefixes. This allows Flex-Algorithm to be
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
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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 October 29, 2021. This Internet-Draft will expire on October 30, 2021.
Copyright Notice Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the Copyright (c) 2021 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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+-------+----------------------+---------------------------+ +-------+----------------------+---------------------------+
| Value | TLV Name | Reference | | Value | TLV Name | Reference |
+-------+----------------------+---------------------------+ +-------+----------------------+---------------------------+
| 29 | IP Algorithm Sub-TLV | This Document Section 5.1 | | 29 | IP Algorithm Sub-TLV | This Document Section 5.1 |
+-------+----------------------+---------------------------+ +-------+----------------------+---------------------------+
This document also updates the "ISIS TLV Codepoints Registry" This document also updates the "ISIS TLV Codepoints Registry"
registry as follows: registry as follows:
+-------+----------------------------------+------------------------+ +-------+------------------+-----+-----+-----+-------+--------------+
| Value | TLV Name | Reference | | Value | TLV Name | IIH | LSP | SNP | Purge | Reference |
+-------+----------------------------------+------------------------+ +-------+------------------+-----+-----+-----+-------+--------------+
| 126 | IPv4 Algorithm Prefix | This document, | | 126 | IPv4 Algorithm | N | Y | N | N | This |
| | Reachability TLV | Section 6.1 | | | Prefix | | | | | document, |
| 127 | IPv6 Algorithm Prefix | This document, | | | Reachability TLV | | | | | Section 6.1 |
| | Reachability TLV | Section 6.2 | | 127 | IPv6 Algorithm | N | Y | N | N | This |
+-------+----------------------------------+------------------------+ | | Prefix | | | | | document, |
| | Reachability TLV | | | | | Section 6.2 |
+-------+------------------+-----+-----+-----+-------+--------------+
This document updates the "OSPFv2 Extended Prefix Opaque LSA TLVs" This document updates the "OSPFv2 Extended Prefix Opaque LSA TLVs"
registry as follows:: registry as follows::
+-------+----------------------------------+------------------------+ +-------+----------------------------------+------------------------+
| Value | TLV Name | Reference | | Value | TLV Name | Reference |
+-------+----------------------------------+------------------------+ +-------+----------------------------------+------------------------+
| TBD | OSPFv2 Algorithm Prefix | This Document, | | TBD | OSPFv2 Algorithm Prefix | This Document, |
| | Reachability TLV | Section 6.1 | | | Reachability TLV | Section 6.1 |
+-------+----------------------------------+------------------------+ +-------+----------------------------------+------------------------+
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TBD. TBD.
14. References 14. References
14.1. Normative References 14.1. Normative References
[I-D.ietf-lsr-flex-algo] [I-D.ietf-lsr-flex-algo]
Psenak, P., Hegde, S., Filsfils, C., Talaulikar, K., and Psenak, P., Hegde, S., Filsfils, C., Talaulikar, K., and
A. Gulko, "IGP Flexible Algorithm", draft-ietf-lsr-flex- A. Gulko, "IGP Flexible Algorithm", draft-ietf-lsr-flex-
algo-13 (work in progress), October 2020. algo-14 (work in progress), February 2021.
[ISO10589] [ISO10589]
IANA, "Intermediate system to Intermediate system routing IANA, "Intermediate system to Intermediate system routing
information exchange protocol for use in conjunction with information exchange protocol for use in conjunction with
the Protocol for providing the Connectionless-mode Network the Protocol for providing the Connectionless-mode Network
Service (ISO 8473)", August 1987, <ISO/IEC 10589:2002>. Service (ISO 8473)", August 1987, <ISO/IEC 10589:2002>.
[RFC0791] Postel, J., "Internet Protocol", STD 5, RFC 791, [RFC0791] Postel, J., "Internet Protocol", STD 5, RFC 791,
DOI 10.17487/RFC0791, September 1981, DOI 10.17487/RFC0791, September 1981,
<https://www.rfc-editor.org/info/rfc791>. <https://www.rfc-editor.org/info/rfc791>.
 End of changes. 6 change blocks. 
13 lines changed or deleted 15 lines changed or added

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