Multicast and Ethernet VPN with Segment Routing Point-to-Multipoint Trees
draft-ietf-bess-mvpn-evpn-sr-p2mp-01
Network Working Group R. Parekh
Internet-Draft C. Filsfils
Intended status: Standards Track A. Venkateswaran
Expires: June 5, 2021 Cisco Systems, Inc.
H. Bidgoli
Nokia
D. Voyer
Bell Canada
Z. Zhang
Juniper Networks
December 2, 2020
Multicast and Ethernet VPN with Segment Routing Point-to-Multipoint
Trees
draft-ietf-bess-mvpn-evpn-sr-p2mp-01
Abstract
A Point-to-Multipoint (P2MP) Tree in a Segment Routing domain
efficiently carries traffic from a Root to a set of Leaves. This
document describes extensions to BGP encodings and procedures for
P2MP trees used in BGP/MPLS IP VPNs and Ethernet VPNs.
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
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on June 5, 2021.
Parekh, et al. Expires June 5, 2021 [Page 1]
Internet-Draft BGP MVPN and EVPN with SR P2MP Trees December 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. SR P2MP P-Tunnels . . . . . . . . . . . . . . . . . . . . . . 3
3. PMSI Tunnel Attribute for SR P2MP . . . . . . . . . . . . . . 4
3.1. MPLS Label . . . . . . . . . . . . . . . . . . . . . . . 5
3.1.1. SR MPLS . . . . . . . . . . . . . . . . . . . . . . . 5
4. MVPN Auto-Discovery and Binding Procedures . . . . . . . . . 5
4.1. Intra-AS I-PMSI . . . . . . . . . . . . . . . . . . . . . 5
4.1.1. Originating Intra-AS I-PMSI routes . . . . . . . . . 5
4.1.2. Receiving Intra-AS I-PMSI A-D routes . . . . . . . . 6
4.2. Using S-PMSIs for binding customer flows to P2MP Segments 7
4.2.1. Originating S-PMSI A-D routes . . . . . . . . . . . . 7
4.2.2. Receiving S-PMSI A-D routes . . . . . . . . . . . . . 8
4.3. Inter-AS P-tunnels using P2MP Segments . . . . . . . . . 8
4.3.1. Advertising Inter-AS I-PMSI routes into iBGP . . . . 8
4.3.2. Receiving Inter-AS I-PMSI A-D routes in iBGP . . . . 8
4.4. Leaf A-D routes for P2MP Segment Leaf Discovery . . . . . 9
4.4.1. Originating Leaf A-D routes . . . . . . . . . . . . . 9
4.4.2. Receiving Leaf A-D routes . . . . . . . . . . . . . . 9
5. Dampening of MVPN routes . . . . . . . . . . . . . . . . . . 9
6. SR P2MP Trees for EVPN . . . . . . . . . . . . . . . . . . . 10
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
8. Security Considerations . . . . . . . . . . . . . . . . . . . 11
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 11
10. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 11
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 12
11.1. Normative References . . . . . . . . . . . . . . . . . . 12
11.2. Informative References . . . . . . . . . . . . . . . . . 12
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