Stacking system and a method for switching traffic in the stacking system
US8248969B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2010 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Dec 17, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/0816
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention provides a stacking system and a method for traffic switching in the stacking system, comprising: when newly joined devices in the stacking system make the daisy chain topology change to ring topology, block a stack port of one of the newly joined devices; after the devices in the stacking system perform another topology convergence process, the master restores the configuration of the newly joined devices; after the configuration of the newly joined device one of whose stack ports is blocked is restored, it sets its blocked stack port to the forwarding state, calculates the shortest path based on the ring topology, and sends first notification packets for topology change from daisy chain type to ring type through its two stack ports; each device that receives the first notification packets re-calculates its shortest forwarding path respectively and switches the traffic, and then forwards the first notification packets. This invention can prevent traffic interruption that occurs when the topology of a stacking system changes from daisy chain to ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.