EVPN multihoming optimizations for ethernet segment connection interruptions
US11438193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2020 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | May 17, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2101/677
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques described herein provide for expediting routing convergence in EVPN with multihomed ethernet segment when one of the redundant devices loses connection to the ethernet segment. When a first redundant device receives EVPN auto discovery (AD) route advertising an ethernet segment from a second redundant device, it creates an entry for a forwarding table. The entry has, for an advertised MAC address, a local identifier of the ethernet segment (marked as active next hop) and the identifier of the second network device (marked as backup next hop). When a packet for that MAC address is received, the first redundant device routes the data using data from the entry. In particular, the first redundant device uses the local identifier of the ethernet segment as next hop when the ethernet segment link is active; and uses the identifier of the second network device as next hop when the ethernet segment is down.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.