| < draft-lapukhov-bgp-ecmp-considerations-03.txt | draft-lapukhov-bgp-ecmp-considerations-04.txt > | |||
|---|---|---|---|---|
| IDR Working Group P. Lapukhov | IDR Working Group P. Lapukhov | |||
| Internet-Draft Facebook | Internet-Draft Facebook | |||
| Intended status: Informational J. Tantsura | Intended status: Informational J. Tantsura | |||
| Expires: May 6, 2020 Apstra, Inc. | Expires: November 18, 2020 Apstra, Inc. | |||
| November 3, 2019 | May 17, 2020 | |||
| Equal-Cost Multipath Considerations for BGP | Equal-Cost Multipath Considerations for BGP | |||
| draft-lapukhov-bgp-ecmp-considerations-03 | draft-lapukhov-bgp-ecmp-considerations-04 | |||
| Abstract | Abstract | |||
| BGP (Border Gateway Protocol) [RFC4271] employs tie-breaking logic to | BGP (Border Gateway Protocol) [RFC4271] employs tie-breaking logic to | |||
| select a single best path among multiple paths available, known as | select a single best path among multiple paths available, known as | |||
| BGP best path selection. At the same time, it has become a common | BGP best path selection. At the same time, it has become a common | |||
| practice to allow for "equal-cost multipath" (ECMP) selection and | practice to allow for "equal-cost multipath" (ECMP) selection and | |||
| programming of multiple next-hops in routing tables. This document | programming of multiple next-hops in routing tables. This document | |||
| summarizes some common considerations for the ECMP logic when BGP is | summarizes some common considerations for the ECMP logic when BGP is | |||
| used as the routing protocol, with the intent of providing common | used as the routing protocol, with the intent of providing common | |||
| skipping to change at page 1, line 38 ¶ | skipping to change at page 1, line 38 ¶ | |||
| 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 May 6, 2020. | This Internet-Draft will expire on November 18, 2020. | |||
| Copyright Notice | Copyright Notice | |||
| Copyright (c) 2019 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 | |||
| carefully, as they describe your rights and restrictions with respect | carefully, as they describe your rights and restrictions with respect | |||
| to this document. Code Components extracted from this document must | to this document. Code Components extracted from this document must | |||
| include Simplified BSD License text as described in Section 4.e of | include Simplified BSD License text as described in Section 4.e of | |||
| the Trust Legal Provisions and are provided without warranty as | the Trust Legal Provisions and are provided without warranty as | |||
| End of changes. 4 change blocks. | ||||
| 5 lines changed or deleted | 5 lines changed or added | |||
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