Router having routing engine software instance and interface...

Details Router having routing engine software instance and interface... Router having routing engine software instance and interface...

2011-04-19

2011-04-19

Tseng, Cheng-Yuan (Department: 2184)

Electrical computers and digital data processing systems: input/

Input/output data processing

Concurrent input/output processing and data transfer

C710S029000, C710S033000

Reexamination Certificate

active

07930443

ABSTRACT:
A network device is described that concurrently executing more than one instance of an operating system on a single processor. Each of the instances of the operating system executes completely independent of the other instances. In this way, disparate instances may exist for the same operating system or for different operating systems. The techniques allow the processor to concurrently execute, for example, an instance of the operating system may emulate a routing engine and an instance of the operating system may emulate an interface controller. A hyper scheduler performs context switches between the operating systems to enable the processor to concurrently execute the instances of the operating system. The techniques may provide a low cost alternative to employing multiple processors within a network device, such as a router, to execute multiple independent operating systems.

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