Transient loop prevention in a hybrid layer-2 network
US8077633B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2009 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Jan 13, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/351
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a first switch at a border between a first network of a first protocol (P1 network) and a first network of a second protocol (P2 network) is interconnected via the first P1 network with a second switch between a second P1 network (interconnected with the first P1 network) and a second P2 network. In response to detecting a merge of the first and second P2 networks, the first switch may: i) block data packets from traversing P1 network boundary ports of the first switch; ii) allow protocol messages to flow between the first and second P1 networks through the P1 network boundary ports of the first switch; iii) allow the first and second P1 networks to discover each other through the protocol messages and to prevent loops; and in response, iv) unblock the P1 network boundary ports of the first switch to allow traversal of data packets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.