Internet DRAFT - draft-psarkar-lsvr-bgp-spf-impl
draft-psarkar-lsvr-bgp-spf-impl
Network Working Group P. Sarkar, Ed.
Internet-Draft VMWare, Inc.
Intended status: Informational K. Patel
Expires: 8 December 2023 Arrcus, Inc.
S. Pallagatti
Individual Contributor
B. Saji
Arista Networks
6 June 2023
BGP Shortest Path Routing Extension Implementation Report
draft-psarkar-lsvr-bgp-spf-impl-01
Abstract
This document is an implementation report for the Shortest Path
Routing Extensions to BGP protocol as defined in
[I-D.ietf-lsvr-bgp-spf]. The authors did not verify the accuracy of
the information provided by respondents. The respondents are experts
with the implementations they reported on, and their responses are
considered authoritative for the implementations for which their
responses represent. The respondents were asked to only use the
"YES" answer if the feature had at least been tested in the lab.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on 8 December 2023.
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Copyright Notice
Copyright (c) 2023 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document. Code Components
extracted from this document must include Revised BSD License text as
described in Section 4.e of the Trust Legal Provisions and are
provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Implementation Forms . . . . . . . . . . . . . . . . . . . . 3
3. BGP-LS-SPF Peering Models . . . . . . . . . . . . . . . . . . 3
4. Extensions to BGP-LS . . . . . . . . . . . . . . . . . . . . 4
5. Support for Simplified Decision Process . . . . . . . . . . . 4
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 5
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
8. Security Considerations . . . . . . . . . . . . . . . . . . . 5
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 5
9.1. Normative References . . . . . . . . . . . . . . . . . . 5
9.2. Informative References . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
[I-D.ietf-lsvr-bgp-spf] describes an alternative solution which
leverages BGP-LS [RFC7752] and the Shortest Path First algorithm
similar to Internal Gateway Protocols (IGPs) such as OSPF [RFC2328].
The solution introduces an new BGP-LS-SPF AFI-SAFI and replaces the
Phase 1 and 2 decision functions of the Decision Process specifed by
[RFC4271] with the Shortest Path First (SPF) algorithm also known as
the Dijkstra algorithm. This solution avails the benefits of both
BGP and SPF-based IGPs that include TCP based flow-control, no
periodic link-state refresh, and completely incremental NLRI
advertisements. These advantages can reduce the overhead in MSDCs
where there is a high degree of Equal Cost Multi- Path (ECMPs) and
the topology is very stable. Additionally, using an SPF-based
computation can support fast convergence and the computation of Loop-
Free Alternatives (LFAs) [RFC5286] in the event of link failures.
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This document provides an implementation report of the Shortest Path
Routing extensions to BGP protocol as specified in
[I-D.ietf-lsvr-bgp-spf].
The authors did not verify the accuracy of the information provided
by respondents or by any alternative means. The respondents are
experts with the implementations they reported on, and their
responses are considered authoritative for the implementations for
which their responses represent. Respondents were asked to only use
the "YES" answer if the feature had at least been tested in the lab.
2. Implementation Forms
Contact and implementation information for person filling out this
form:
ArcOS
Name: Pushpasis Sarkar
Email: pushpasis@arrcus.com
Vendor: Arrcus, Inc.
Release: ArcOS
Protocol Role: Route Reflector and Client
FRR
Name: Basil Saji
Email: sajibasil@gmail.com
Vendor: FRR
Release:
Protocol Role: Route Reflector
Name: Santosh P K
Email: santosh.pallagatti@gmail.com
Vendor: FRR
Release:
Protocol Role: Route Reflector
Figure 1
3. BGP-LS-SPF Peering Models
Does the implementation support the following BGP-LS-SPF Peering
Models as specified in Section 2 of [I-D.ietf-lsvr-bgp-spf]?
* 2.1 -- BGP Single-Hop Peering on Network Node Connections
* 2.2 -- BGP Peering Between Directly Connected Network Nodes
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* 2.3 -- BGP Peering in Route-Reflector or Controller Topology
+==========+=====+=====+============================+
| Reelease | 2.1 | 2.2 | 2.3 |
+==========+=====+=====+============================+
| ArcOS | Yes | Yes | Yes (Route Reflector only) |
+----------+-----+-----+----------------------------+
| FRR | Yes | Yes | Yes |
+----------+-----+-----+----------------------------+
Table 1: Peering Model Support
4. Extensions to BGP-LS
Does the implementation support the following BGP-LS-SPF TLVs as
described in Section 4 and sub-sections of [I-D.ietf-lsvr-bgp-spf]??
* T1 -- Node NLRI Attribute SPF Capability TLV
* T2 -- Node/Link/Prefix NLRI Attribute SPF Status TLV
* T3 -- Link NLRI Attribute IPv4 Prefix-Length TLV
* T4 -- Link NLRI Attribute IPv6 Prefix-Length TLV
* T5 -- Attribute Sequence-Number TLV
+=========+=============+=====+=====+=====+=====+=====+
| Release | Send / Recv | T1 | T2 | T3 | T4 | T5 |
+=========+=============+=====+=====+=====+=====+=====+
| ArcOS | Send | Yes | Yes | Yes | Yes | Yes |
+---------+-------------+-----+-----+-----+-----+-----+
| | Recv | Yes | Yes | Yes | Yes | Yes |
+---------+-------------+-----+-----+-----+-----+-----+
| FRR | Send | Yes | Yes | Yes | Yes | Yes |
+---------+-------------+-----+-----+-----+-----+-----+
| | Recv | Yes | Yes | Yes | Yes | Yes |
+---------+-------------+-----+-----+-----+-----+-----+
Table 2: BGP-LS Extension TLVs Support
5. Support for Simplified Decision Process
Does the implementation support the following Best Path Decision
processes as described in Section 5 and sub-sections of
[I-D.ietf-lsvr-bgp-spf]?
* P1 -- Phase-1 BGP NLRI Selection
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* P2 -- Dual Stack Support
* P3 -- SPF Calculation based on BGP-LS NLRI
+=========+=====+=====+=====+
| Release | P1 | P2 | P3 |
+=========+=====+=====+=====+
| ArcOS | Yes | Yes | Yes |
+---------+-----+-----+-----+
| TBA | --- | --- | --- |
+---------+-----+-----+-----+
Table 3: Decision Process
Support
6. Acknowledgements
TBA
7. IANA Considerations
N/A. - No protocol changes are proposed in this document.
8. Security Considerations
This document does not introduce any change in any of the protocol
specifications.
9. References
9.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC2328] Moy, J., "OSPF Version 2", STD 54, RFC 2328,
DOI 10.17487/RFC2328, April 1998,
<https://www.rfc-editor.org/info/rfc2328>.
[RFC4271] Rekhter, Y., Ed., Li, T., Ed., and S. Hares, Ed., "A
Border Gateway Protocol 4 (BGP-4)", RFC 4271,
DOI 10.17487/RFC4271, January 2006,
<https://www.rfc-editor.org/info/rfc4271>.
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[RFC5286] Atlas, A., Ed. and A. Zinin, Ed., "Basic Specification for
IP Fast Reroute: Loop-Free Alternates", RFC 5286,
DOI 10.17487/RFC5286, September 2008,
<https://www.rfc-editor.org/info/rfc5286>.
[RFC5331] Aggarwal, R., Rekhter, Y., and E. Rosen, "MPLS Upstream
Label Assignment and Context-Specific Label Space",
RFC 5331, DOI 10.17487/RFC5331, August 2008,
<https://www.rfc-editor.org/info/rfc5331>.
[RFC7752] Gredler, H., Ed., Medved, J., Previdi, S., Farrel, A., and
S. Ray, "North-Bound Distribution of Link-State and
Traffic Engineering (TE) Information Using BGP", RFC 7752,
DOI 10.17487/RFC7752, March 2016,
<https://www.rfc-editor.org/info/rfc7752>.
9.2. Informative References
[I-D.ietf-lsvr-bgp-spf]
Patel, K., Lindem, A., Zandi, S., and W. Henderickx,
"Shortest Path Routing Extensions for BGP Protocol", Work
in Progress, Internet-Draft, draft-ietf-lsvr-bgp-spf-08,
24 March 2020, <https://datatracker.ietf.org/doc/html/
draft-ietf-lsvr-bgp-spf-08>.
Authors' Addresses
Pushpasis Sarkar (editor)
VMWare, Inc.
Bangalore 562125
KA
India
Email: pushpasis.ietf@gmail.com
Keyur Patel
Arrcus, Inc.
Email: keyur@arrcus.com
Santosh
Individual Contributor
Email: santosh.pallagatti@gmail.com
Basil
Arista Networks
Email: sajibasil@gmail.com
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