Joining multiple spanning tree networks across ring network
US8355348B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2010 |
| Grant date | Jan 15, 2013 |
| Priority date | — |
| Expiry date | Mar 25, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/42
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In general, this disclosure describes techniques that may allow multiple spanning tree networks to be joined across a ring network. In a ring topology, e.g., an Ethernet ring topology, there are multiple nodes connected one to another to form a ring. Subtending from the ring network are customer devices that may joined together to form networks, e.g., Ethernet networks. Providing only a single connection between a subtending network and the ring network risks isolating the subtending network from the ring network if a fault occurs on the connecting link. Providing two links between a subtending network and the ring network, however, may create an undesirable traffic loop. One example protocol used by the customer devices to communicate with one another in a network and prevent looping paths is Spanning Tree Protocol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.