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RFC 9722
Title: Fast Recovery for EVPN Designated
Forwarder Election
Author: P. Brissette,
A. Sajassi,
LA. Burdet, Ed.,
J. Drake,
J. Rabadan
Status: Standards Track
Stream: IETF
Date: May 2025
Mailbox: [email protected],
[email protected],
[email protected],
[email protected],
[email protected]
Pages: 14
Updates: RFC 8584
I-D Tag: draft-ietf-bess-evpn-fast-df-recovery-12.txt
URL: https://www.rfc-editor.org/info/rfc9722
DOI: 10.17487/RFC9722
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.
This document is a product of the BGP Enabled ServiceS Working Group of the
IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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