Method for synchronized BGP and VRRP failover of a network device in a network
US9537756B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2013 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Sep 3, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/22
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A network device which communicates with peers using Border Gateway Protocol (BGP) advertises to one or more peers a first Multi-Exit Discriminator (MED) when all sessions are in ‘established’ state, and a second MED when one or more sessions are in a non-‘established’ state. The second MED is higher than the first MED and higher than the MED advertised by the backup network device, causing peers to prefer the backup device. If the device is also configured for Virtual Router Redundancy Protocol (VRRP), when the device advertises the first MED, virtual routers are transitioned to ‘master’ state, and when the device advertises the second MED, virtual routers are transitioned to ‘backup’ state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.