Aliasing behavior for traffic to multihomed sites in ethernet virtual private network (EVPN) networks
US11057243B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2020 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | Mar 7, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/458
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For use in an Ethernet Virtual Private Network (EVPN) in which a site including at least one MAC-addressable device is multihomed, via a customer edge device (CE), to at least two provider edge devices (PE1 and PE2), the potential problem of one of the at least two provider edge devices (PE2) dropping or flooding packets designed for a MAC-addressable device of the multihomed site is solved by controlling advertisements of an auto-discovery per EVPN instance (A-D/EVI) route (or an auto-discovery per Ethernet segment identifier (A-D/ESI) route) to a remote provider edge device (PE3), belonging to the EVPN but not directly connected with the CE. Such advertisements may be controlled by: (a) determining, by PE2, whether or not a MAC-learning condition is met; and (b) responsive to a determination that the MAC-learning condition is met, advertising, by PE2, an A-D/EVI route (or an A-D/ESI route) to the remote provider edge device (PE3), and otherwise, responsive to a determination that the MAC-learning condition is not met, suppressing, by PE2, an A-D/EVI route advertisement (or an A-D/ESI route advertisement).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.