HP 6125G HP 6125G & 6125G/XG Blade Switches High Availability Configur - Page 189

Configuring track Track overview Introduction to collaboration The track module works between application and detection modules, as shown in Figure 48. It shields the differences between various detection modules from application modules. Collaboration is enabled after you associate the track module with a detection module and an application module. The detection module probes specific objects such as interface status, link status, network reachability, and network performance, and informs the track module of detection results. The track module sends the detection results to the associated application module. When notified of changes of the tracked object, the application modules can react to avoid communication interruption and network performance degradation. Figure 48 Collaboration through the track module Collaboration fundamentals The track module collaborates with detection modules and application modules: • Collaboration between the track module and a detection module • Collaboration between the track module and an application module Collaboration between the track module and a detection module The detection module sends the detection result of the associated tracked object to the track module. Depending on the result, the track module changes the status of the track entry: • If the tracked object functions normally, for example, the target interface is up or the target network is reachable, the state of the track entry is Positive. • If the tracked object functions abnormally, for example, the target interface is down or the target network is unreachable, the state of the track entry is Negative. • If the detection result is not valid, for example, the NQA test group that is associated with the track entry does not exist, the state of the track entry is Invalid. The following detection modules can be associated with the track module: 182