Method and system for selecting a master controller in a redundant control plane having plural controllers
US6886107B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2001 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Jun 23, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2028
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for configuring a control plane within a network device. One of a pair of control processors is selected to act as the master of the control plane and the other control processor is specified as a standby control processor in normal operation. In the case of a failover or switchover event, the standby control processor assumes the role of the master of the control plane and updates configuration information within line cards in the network device as necessary. A state machine within the control processor is employed to manage state transitions for the control processor. Each control processor generates at least one signal that indicates whether it is capable of serving as the master of the control plane. Master selection logic selects one of the control processors as the master for the control plane and in one embodiment advertises the identification of the master control processor via triply redundant signals. Voting logic within the control processors and other cards within the network device is employed to identify the selected master unit for the control plane. The selected master control plane processor forwards the configuration information over control pa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.