The IESG has received a request from the BGP Enabled ServiceS WG (bess) to consider the following document: - 'Weighted Multi-Path Procedures for EVPN Multi-Homing' <draft-ietf-bess-evpn-unequal-lb-30.txt> as Proposed Standard
The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the [email protected] mailing lists by 2026-01-26. Exceptionally, comments may be sent to [email protected] instead. In either case, please retain the beginning of the Subject line to allow automated sorting. Abstract Ethernet VPN (EVPN) provides all-active multi-homing for Customer Equipment (CE) devices connected to multiple Provider Edge (PE) devices, enabling equal cost load balancing of both bridged and routed traffic across the set of multi-homing PEs. However, existing procedures implicitly assume equal access bandwidth distribution among the multi-homing PEs, which can constrain link additions or removals and may not handle unequal PE-CE link bandwidth following link failures. This document specifies extensions to EVPN procedures to support weighted multi-pathing in proportion to PE-CE link bandwidth or operator-defined weights, thereby providing greater flexibility and resilience in multi-homing deployments. The extensions include signaling mechanisms to distribute traffic across egress PEs based on relative bandwidth or weight, and enhancements to Broadcast, Unknown Unicast, and Multicast (BUM) designated forwarder (DF) election to achieve weighted DF distribution across the multi- homing PE set. The document updates RFC 8584 and related EVPN DF election extensions (i.e. draft-ietf-bess-evpn-per-mcast-flow-df- election and draft-ietf-bess-evpn-pref-df) to enable weighted load balancing across different DF election algorithms. The file can be obtained via https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-unequal-lb/ No IPR declarations have been submitted directly on this I-D. The document contains these normative downward references. See RFC 3967 for additional information: draft-ietf-bess-evpn-per-mcast-flow-df-election: Per multicast flow Designated Forwarder Election for EVPN (None - Internet Engineering Task Force (IETF) stream) _______________________________________________ BESS mailing list -- [email protected] To unsubscribe send an email to [email protected]
