In-service software upgrade systems and methods utilizing two router processors in a network element
US11394643B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2020 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Aug 19, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/34
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A node includes one or more line cards interconnected to one another via a switching fabric and configured to implement a data plane; and a first router processor and a second router processor communicatively coupled to the one or more line cards, and each configured to implement a separate control plane, such that the node appears in a link-state database as two separate nodes. Responsive to an in-service software upgrade, the first router processor is upgraded and down while the second router processor is active, thereby preserving routing and forwarding. The one or more line cards include a first Virtual Local Area Networking (VLAN) for the first router processor and a second VLAN for the second router processor, and the first VLAN and the second VLAN are associated with a same physical interface on the one or more line cards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.