Forwarding path failure detection using packet loop
US11153199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2019 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Feb 12, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2101/622
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A packet loop runs between two participating endpoint network devices, and in particular runs in the respective data planes of the endpoint devices. A probe packet is provided to the data plane of an initiating device and is forwarded to the other device to initiate the packet loop. The source and destination addresses in the probe packet are set equal to a common address. Based on the common address, entries in the respective forwarding tables of the endpoint devices are established to point to each other so that the probe packet is forwarded back and forth between the two devices thus sustaining the packet loop. A broken loop indicates a forwarding path failure at which time corrective action to be taken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.