Method and system for ethernet virtual private network (EVPN) split-horizon filtering
US12375321B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2019 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Apr 27, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embodiments of the disclosed techniques include methods, apparatus, and instructions for split-horizon filtering in an Ethernet virtual private network (EVPN), where an EVPN instance includes a plurality of provider edges (PEs) that forward traffic for a plurality of customer edges (CEs). In one embodiment, a method includes advertising a set of single Broadcast, Unknown unicast, or Multicast (BUM) identifiers, each in an Inclusive Multicast Ethernet tag (IMET) route from a PE of the EVPN instance to one other PE within the plurality of PEs, where each PE that shares an Ethernet segment with the PE is advertised with one unique BUM identifier to distinguish BUM packets from that PE with BUM packets from other PEs of the EVPN instance; and forwarding by the PE, BUM packets from another PE of the EVPN instance to one or more CEs coupled to the PE based on a single BUM identifier encapsulated within the BUM packets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.