RFC 9625: EVPN Optimized Inter-Subnet Multicast (OISM) Forwarding
In plain English — editorial summary, not part of the RFC
Ethernet VPN (EVPN) provides a service that allows a single Local Area Network (LAN), comprising a single IP subnet, to be divided into multiple segments. Each segment may be located at a different site, and the segments are interconnected by an IP or MPLS backbone. Intra-subnet traffic (either unicast or multicast) always appears to the end users to be bridged, even when it is actually carried over the IP or MPLS backbone. When a single tenant owns multiple such LANs, EVPN also allows IP unicast traffic to be routed between those LANs. This document specifies new procedures that allow inter-subnet IP multicast traffic to be routed among the LANs of a given tenant while still making intra-subnet IP multicast traffic appear to be bridged. These procedures can provide optimal routing of the inter-subnet multicast traffic and do not require any such traffic to egress a given router and then ingress that same router. These procedures also accommodate IP multicast traffic that originates or is destined to be external to the EVPN domain.
Document record
- Document ID
- RFC9625
- Published
- August 2024
- Authors
- W. Lin; Z. Zhang; J. Drake; E. Rosen; J. Rabadan; A. Sajassi
- Status
- PROPOSED STANDARD
- Stream
- IETF
- Area
- rtg
- Pages
- 63
- Also known as
- —
Topics
Related documents
Ranked automatically by shared keywords, IETF area and stream — not by editorial selection.
- RFC 9856Multicast Source Redundancy in EVPNsCurrent
September 2025
- RFC 8382Shared Bottleneck Detection for Coupled Congestion Control for RTP MediaCurrent
June 2018
- RFC 9624EVPN Broadcast, Unknown Unicast, or Multicast (BUM) Using Bit Index Explicit Replication (BIER)Current
August 2024
- RFC 9633Deterministic Networking (DetNet) YANG Data ModelCurrent
October 2024
- RFC 9616Delay-Based Metric Extension for the Babel Routing ProtocolCurrent
September 2024
- RFC 9634Operations, Administration, and Maintenance (OAM) for Deterministic Networking (DetNet) with the IP Data PlaneCurrent
October 2024
- RFC 9613Requirements for Solutions that Support MPLS Network Actions (MNAs)Current
August 2024
- RFC 9612Bidirectional Forwarding Detection (BFD) Reverse Path for MPLS Label Switched Paths (LSPs)Current
July 2024
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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.
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