Host bus adaptor-based virtualization switch
US7269168B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2002 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Jun 21, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/3009
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Placing virtualization agents in the switches which comprise the SAN fabric. Higher level virtualization management functions are provided in an external management server. Conventional HBAs can be utilized in the hosts and storage units. In a first embodiment, a series of HBAs are provided in the switch unit. The HBAs connect to bridge chips and memory controllers to place the frame information in dedicated memory. Routine translation of known destinations is done by the HBA, based on a virtualization table provided by a virtualization CPU. If a frame is not in the table, it is provided to the dedicated RAM. Analysis and manipulation of the frame headers is then done by the CPU, with a new entry being made in the HBA table and the modified frames then redirected by the HBA into the fabric. This can be done in either a standalone switch environment or in combination with other switching components located in a director level switch. In an alternative embodiment, specialized hardware scans incoming frames and detects the virtualized frames which need to be redirected. The redirection is then handled by translation of the frame header information by hardware table-based logic and the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.