| rfc9830v4.txt | rfc9830.txt | |||
|---|---|---|---|---|
| Internet Engineering Task Force (IETF) S. Previdi | Internet Engineering Task Force (IETF) S. Previdi | |||
| Request for Comments: 9830 Huawei Technologies | Request for Comments: 9830 Huawei Technologies | |||
| Updates: 9012 C. Filsfils | Updates: 9012 C. Filsfils | |||
| Category: Standards Track K. Talaulikar, Ed. | Category: Standards Track K. Talaulikar, Ed. | |||
| ISSN: 2070-1721 Cisco Systems | ISSN: 2070-1721 Cisco Systems | |||
| P. Mattes | P. Mattes | |||
| Microsoft | Microsoft | |||
| D. Jain | D. Jain | |||
| August 2025 | September 2025 | |||
| Advertising Segment Routing Policies in BGP | Advertising Segment Routing Policies in BGP | |||
| Abstract | Abstract | |||
| A Segment Routing (SR) Policy is an ordered list of segments (also | A Segment Routing (SR) Policy is an ordered list of segments (also | |||
| referred to as "instructions") that define a source-routed policy. | referred to as "instructions") that define a source-routed policy. | |||
| An SR Policy consists of one or more Candidate Paths (CPs), each | An SR Policy consists of one or more Candidate Paths (CPs), each | |||
| comprising one or more segment lists. A headend can be provisioned | comprising one or more segment lists. A headend can be provisioned | |||
| with these CPs using various mechanisms such as Command-Line | with these CPs using various mechanisms such as Command-Line | |||
| skipping to change at line 990 ¶ | skipping to change at line 990 ¶ | |||
| Section 4.1 of [RFC9256]. | Section 4.1 of [RFC9256]. | |||
| 0 1 2 3 | 0 1 2 3 | |||
| 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |||
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |||
| | Type | Length | Flags | RESERVED | | | Type | Length | Flags | RESERVED | | |||
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |||
| | ENLP | | | ENLP | | |||
| +-+-+-+-+-+-+-+-+ | +-+-+-+-+-+-+-+-+ | |||
| Figure 15: ELNP Sub-TLV | Figure 15: ENLP Sub-TLV | |||
| Where: | Where: | |||
| Type: 14 | Type: 14 | |||
| Length: Specifies the length of the value field (i.e., not including | Length: Specifies the length of the value field (i.e., not including | |||
| Type and Length fields) in terms of octets. The value MUST be 3. | Type and Length fields) in terms of octets. The value MUST be 3. | |||
| Flags: 1 octet of flags. No flags are defined in this document. | Flags: 1 octet of flags. No flags are defined in this document. | |||
| The Flags field MUST be set to zero on transmission and MUST be | The Flags field MUST be set to zero on transmission and MUST be | |||
| skipping to change at line 1851 ¶ | skipping to change at line 1851 ¶ | |||
| <https://www.rfc-editor.org/info/rfc6952>. | <https://www.rfc-editor.org/info/rfc6952>. | |||
| [RFC9552] Talaulikar, K., Ed., "Distribution of Link-State and | [RFC9552] Talaulikar, K., Ed., "Distribution of Link-State and | |||
| Traffic Engineering Information Using BGP", RFC 9552, | Traffic Engineering Information Using BGP", RFC 9552, | |||
| DOI 10.17487/RFC9552, December 2023, | DOI 10.17487/RFC9552, December 2023, | |||
| <https://www.rfc-editor.org/info/rfc9552>. | <https://www.rfc-editor.org/info/rfc9552>. | |||
| [RFC9831] Talaulikar, K., Ed., Filsfils, C., Previdi, S., Mattes, | [RFC9831] Talaulikar, K., Ed., Filsfils, C., Previdi, S., Mattes, | |||
| P., and D. Jain, "Segment Type Extensions for BGP Segment | P., and D. Jain, "Segment Type Extensions for BGP Segment | |||
| Routing (SR) Policy", RFC 9831, DOI 10.17487/RFC9831, | Routing (SR) Policy", RFC 9831, DOI 10.17487/RFC9831, | |||
| August 2025, <https://www.rfc-editor.org/info/rfc9831>. | September 2025, <https://www.rfc-editor.org/info/rfc9831>. | |||
| [SR-POLICY-YANG] | [SR-POLICY-YANG] | |||
| Raza, K., Ed., Saleh, T., Shunwan, Z., Voyer, D., Durrani, | Raza, K., Ed., Saleh, T., Shunwan, Z., Voyer, D., Durrani, | |||
| M., Matsushima, S., and V. Beeram, "YANG Data Model for | M., Matsushima, S., and V. Beeram, "YANG Data Model for | |||
| Segment Routing Policy", Work in Progress, Internet-Draft, | Segment Routing Policy", Work in Progress, Internet-Draft, | |||
| draft-ietf-spring-sr-policy-yang-04, 22 November 2024, | draft-ietf-spring-sr-policy-yang-04, 22 November 2024, | |||
| <https://datatracker.ietf.org/doc/html/draft-ietf-spring- | <https://datatracker.ietf.org/doc/html/draft-ietf-spring- | |||
| sr-policy-yang-04>. | sr-policy-yang-04>. | |||
| Acknowledgments | Acknowledgments | |||
| End of changes. 3 change blocks. | ||||
| 3 lines changed or deleted | 3 lines changed or added | |||
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