Method and system for asymmetrically maintaining system operability

DETAILED DESCRIPTION In accordance with the present invention, a system and method for asymmetrically maintaining system operability is provided that substantially eliminates or reduces disadvantages or problems associated with previously developed network management systems and methods.
In one embodiment of the present invention, a system is provided for asymmetrically maintaining system operability that includes a first processing element and a second processing element coupled to the first processing element by a communication link.
The first processing element is operable to perform at least one function.
The second processing element is operable to perform at least one function of the first processing element in the event the first processing element fails, and further operable to expect and receive keepalive inquiries at an expected rate from the first processing element and to send responses in response to the inquiries to the first processing element.
The second processing element is further operable to take remedial action after not receiving any inquiries within a first predetermined time period.
In another embodiment of the present invention, the first processing element is operable to take remedial action after not receiving any response to any inquiries sent within a second predetermined time period, wherein the first predetermined time period is larger than the second predetermined time period.
In other embodiments of the present invention, the first and second processing elements are routers.
An important technical advantage of the present invention inheres in the fact that the system establishes a primary element and a secondary element to detect failures within the system.
The invention includes the ability to detect whether the primary or secondary elements have failed, and to maintain the operability of the system in the event of such a failure.
For example, the primary and secondary elements may send a service request or sound an alarm.
The present invention also includes the ability to detect and maintain operation in case of a failure of the communication link between the primary and secondary elements