Extended Mobility Procedures for Ethernet VPN Integrated Routing and Bridging
RFC 9721, “Extended Mobility Procedures for Ethernet VPN Integrated Routing and Bridging”, is a Proposed Standard document published in April 2025 by N. Malhotra, A. Sajassi, A. Pattekar, J. Rabadan, A. Lingala, J. Drake. The canonical text is published by the RFC Editor.
Abstract
This document specifies extensions to the Ethernet VPN Integrated Routing and Bridging (EVPN-IRB) procedures specified in RFCs 7432 and 9135 to enhance the mobility mechanisms for networks based on EVPN-IRB. The proposed extensions improve the handling of host mobility and duplicate address detection in EVPN-IRB networks to cover a broader set of scenarios where a host's unicast IP address to Media Access Control (MAC) address bindings may change across moves. These enhancements address limitations in the existing EVPN-IRB mobility procedures by providing more efficient and scalable solutions. The extensions are backward compatible with existing EVPN-IRB implementations and aim to optimize network performance in scenarios involving frequent IP address mobility.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9721 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
- RFC 9720 RFC Formats and Versions
- RFC 9722 Fast Recovery for EVPN Designated Forwarder Election
- RFC 9719 YANG Data Model for Routing in Fat Trees
- RFC 9723 BGP Colored Prefix Routing for Services Based on Segment Routing over IPv6
- RFC 9718 DNSSEC Trust Anchor Publication for the Root Zone
- RFC 9724 State of Affairs for Randomized and Changing Media Access Control Addresses
- RFC 9717 A Routing Architecture for Satellite Networks
- RFC 9725 WebRTC-HTTP Ingestion Protocol