Research And Implement Of Network Card Redundancy And Network Watch

Network reliability is regarded by more and more users along with the elevation of network' s speed and data capacity. Especially in network used for warship, network reliability is a key factor for performance of the network. There are many methods to enhance network reliability. This thesis has been exploring mainly in network card redundancy and network watch.First of all, this thesis expatiates windows 2000' s network drivers, including protocol driver, intermediate driver and miniport driver, especially about the implement principle of intermediate driver. Then, fault information received by intermediate driver when network faults is analyzed. As reaction, the information is processed by my driver. So higher level of network and application can' t sense that the network has faulted partly.Because intermediate driver runs in system kernel, any exiguous mistake will result in unsteadiness of system so much as system crush. This thesis gives prominence to specifying system resource management and interrupt request level(IRQL) of routines.Besides using network card redundancy , watching network is effective to enhance network reliability. In this thesis, watch of network is described in two aspects, capture of data packet and protocol decode. WinPcap library is adopted to catch network data packets, which is wrote by S. McCanne and V. Jacobson of California University. The protocol decode module refers data structure of internet layer and data link layer.