| < draft-ietf-lsvr-bgp-spf-08.txt | draft-ietf-lsvr-bgp-spf-09.txt > | |||
|---|---|---|---|---|
| Network Working Group K. Patel | Network Working Group K. Patel | |||
| Internet-Draft Arrcus, Inc. | Internet-Draft Arrcus, Inc. | |||
| Intended status: Standards Track A. Lindem | Intended status: Standards Track A. Lindem | |||
| Expires: September 25, 2020 Cisco Systems | Expires: November 16, 2020 Cisco Systems | |||
| S. Zandi | S. Zandi | |||
| W. Henderickx | W. Henderickx | |||
| Nokia | Nokia | |||
| March 24, 2020 | May 15, 2020 | |||
| Shortest Path Routing Extensions for BGP Protocol | Shortest Path Routing Extensions for BGP Protocol | |||
| draft-ietf-lsvr-bgp-spf-08 | draft-ietf-lsvr-bgp-spf-09 | |||
| Abstract | Abstract | |||
| Many Massively Scaled Data Centers (MSDCs) have converged on | Many Massively Scaled Data Centers (MSDCs) have converged on | |||
| simplified layer 3 routing. Furthermore, requirements for | simplified layer 3 routing. Furthermore, requirements for | |||
| operational simplicity have led many of these MSDCs to converge on | operational simplicity have led many of these MSDCs to converge on | |||
| BGP as their single routing protocol for both their fabric routing | BGP as their single routing protocol for both their fabric routing | |||
| and their Data Center Interconnect (DCI) routing. This document | and their Data Center Interconnect (DCI) routing. This document | |||
| describes a solution which leverages BGP Link-State distribution and | describes a solution which leverages BGP Link-State distribution and | |||
| the Shortest Path First (SPF) algorithm similar to Internal Gateway | the Shortest Path First (SPF) algorithm similar to Internal Gateway | |||
| skipping to change at page 1, line 42 ¶ | skipping to change at page 1, line 42 ¶ | |||
| 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 September 25, 2020. | This Internet-Draft will expire on November 16, 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 | |||
| skipping to change at page 18, line 26 ¶ | skipping to change at page 18, line 26 ¶ | |||
| Capability TLV in the Node NLRI BGP-LS Attribute [RFC7752], it MUST | Capability TLV in the Node NLRI BGP-LS Attribute [RFC7752], it MUST | |||
| ignore the received TLV and the Node NLRI and not pass it to other | ignore the received TLV and the Node NLRI and not pass it to other | |||
| BGP peers as specified in [RFC7606]. When discarding a Node NLRI | BGP peers as specified in [RFC7606]. When discarding a Node NLRI | |||
| with malformed TLV, a BGP speaker SHOULD log an error for further | with malformed TLV, a BGP speaker SHOULD log an error for further | |||
| analysis. | analysis. | |||
| 6. IANA Considerations | 6. IANA Considerations | |||
| This document defines an AFI/SAFI for BGP-LS SPF operation and | This document defines an AFI/SAFI for BGP-LS SPF operation and | |||
| requests IANA to assign the BGP-LS/BGP-LS-SPF (AFI 16388 / SAFI TBD1) | requests IANA to assign the BGP-LS/BGP-LS-SPF (AFI 16388 / SAFI TBD1) | |||
| as described in [RFC4750]. | as described in [RFC4760]. | |||
| This document also defines five attribute TLVs for BGP-LS NLRI. We | This document also defines five attribute TLVs for BGP-LS NLRI. We | |||
| request IANA to assign types for the SPF capability TLV, Sequence | request IANA to assign types for the SPF capability TLV, Sequence | |||
| Number TLV, IPv4 Link Prefix-Length TLV, IPv6 Link Prefix-Length TLV, | Number TLV, IPv4 Link Prefix-Length TLV, IPv6 Link Prefix-Length TLV, | |||
| and SPF Status TLV from the "BGP-LS Node Descriptor, Link Descriptor, | and SPF Status TLV from the "BGP-LS Node Descriptor, Link Descriptor, | |||
| Prefix Descriptor, and Attribute TLVs" Registry. | Prefix Descriptor, and Attribute TLVs" Registry. | |||
| 7. Security Considerations | 7. Security Considerations | |||
| This extension to BGP does not change the underlying security issues | This extension to BGP does not change the underlying security issues | |||
| skipping to change at page 19, line 23 ¶ | skipping to change at page 19, line 23 ¶ | |||
| total number of SPF computations of each type and the total number of | total number of SPF computations of each type and the total number of | |||
| SPF triggering events. Additionally, to troubleshoot SPF scheduling | SPF triggering events. Additionally, to troubleshoot SPF scheduling | |||
| and back-off [RFC8405], the current SPF back-off state, remaining | and back-off [RFC8405], the current SPF back-off state, remaining | |||
| time-to-learn, remaining holddown, last trigger event time, last SPF | time-to-learn, remaining holddown, last trigger event time, last SPF | |||
| time, and next SPF time should be available. | time, and next SPF time should be available. | |||
| 9. Acknowledgements | 9. Acknowledgements | |||
| The authors would like to thank Sue Hares, Jorge Rabadan, Boris | The authors would like to thank Sue Hares, Jorge Rabadan, Boris | |||
| Hassanov, Dan Frost, Matt Anderson, and Fred Baker for their review | Hassanov, Dan Frost, Matt Anderson, and Fred Baker for their review | |||
| and comments. Thanks to Chaitanya Yadlapalli and Pushpais Sarkar for | and comments. Thanks to Chaitanya Yadlapalli and Pushpasis Sarkar | |||
| discussions on preventing a BGP SPF Router from being used for non- | for discussions on preventing a BGP SPF Router from being used for | |||
| local traffic (i.e., transit traffic). | non-local traffic (i.e., transit traffic). | |||
| The authors extend special thanks to Eric Rosen for fruitful | The authors extend special thanks to Eric Rosen for fruitful | |||
| discussions on BGP-LS SPF convergence as compared to IGPs. | discussions on BGP-LS SPF convergence as compared to IGPs. | |||
| 10. Contributors | 10. Contributors | |||
| In addition to the authors listed on the front page, the following | In addition to the authors listed on the front page, the following | |||
| co-authors have contributed to the document. | co-authors have contributed to the document. | |||
| Derek Yeung | Derek Yeung | |||
| skipping to change at page 21, line 10 ¶ | skipping to change at page 21, line 10 ¶ | |||
| Francois, P., and C. Bowers, "Shortest Path First (SPF) | Francois, P., and C. Bowers, "Shortest Path First (SPF) | |||
| Back-Off Delay Algorithm for Link-State IGPs", RFC 8405, | Back-Off Delay Algorithm for Link-State IGPs", RFC 8405, | |||
| DOI 10.17487/RFC8405, June 2018, | DOI 10.17487/RFC8405, June 2018, | |||
| <https://www.rfc-editor.org/info/rfc8405>. | <https://www.rfc-editor.org/info/rfc8405>. | |||
| 11.2. Information References | 11.2. Information References | |||
| [I-D.ietf-lsvr-applicability] | [I-D.ietf-lsvr-applicability] | |||
| Patel, K., Lindem, A., Zandi, S., and G. Dawra, "Usage and | Patel, K., Lindem, A., Zandi, S., and G. Dawra, "Usage and | |||
| Applicability of Link State Vector Routing in Data | Applicability of Link State Vector Routing in Data | |||
| Centers", draft-ietf-lsvr-applicability-04 (work in | Centers", draft-ietf-lsvr-applicability-05 (work in | |||
| progress), November 2019. | progress), March 2020. | |||
| [RFC2328] Moy, J., "OSPF Version 2", STD 54, RFC 2328, | [RFC2328] Moy, J., "OSPF Version 2", STD 54, RFC 2328, | |||
| DOI 10.17487/RFC2328, April 1998, | DOI 10.17487/RFC2328, April 1998, | |||
| <https://www.rfc-editor.org/info/rfc2328>. | <https://www.rfc-editor.org/info/rfc2328>. | |||
| [RFC4456] Bates, T., Chen, E., and R. Chandra, "BGP Route | [RFC4456] Bates, T., Chen, E., and R. Chandra, "BGP Route | |||
| Reflection: An Alternative to Full Mesh Internal BGP | Reflection: An Alternative to Full Mesh Internal BGP | |||
| (IBGP)", RFC 4456, DOI 10.17487/RFC4456, April 2006, | (IBGP)", RFC 4456, DOI 10.17487/RFC4456, April 2006, | |||
| <https://www.rfc-editor.org/info/rfc4456>. | <https://www.rfc-editor.org/info/rfc4456>. | |||
| End of changes. 7 change blocks. | ||||
| 10 lines changed or deleted | 10 lines changed or added | |||
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