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RFC 9722: Fast Recovery for EVPN Designated Forwarder Election

In plain English — editorial summary, not part of the RFC

The Ethernet Virtual Private Network (EVPN) solution in RFC 7432 provides Designated Forwarder (DF) election procedures for multihomed Ethernet Segments. These procedures have been enhanced further by applying the Highest Random Weight (HRW) algorithm for DF election to avoid unnecessary DF status changes upon a failure. This document improves these procedures by providing a fast DF election upon recovery of the failed link or node associated with the multihomed Ethernet Segment. This document updates RFC 8584 by optionally introducing delays between some of the events therein. The solution is independent of the number of EVPN Instances (EVIs) associated with that Ethernet Segment, and it is performed via a simple signaling in BGP between the recovered node and each of the other nodes in the multihoming group.

Document record

Document ID
RFC9722
Published
May 2025
Authors
P. Brissette; A. Sajassi; LA. Burdet; J. Drake; J. Rabadan
Status
PROPOSED STANDARD
Stream
IETF
Area
rtg
Pages
14
Also known as
—
Updates:
RFC 8584

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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.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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canonical URL: /rfc/9722-fast-recovery-for-evpn-designated-forwarder-election