H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 137)

11-2
module of the detection result, and the track module triggers other application modules to process
accordingly. The implementation of collaboration is shown in Figure 11-1 .
Figure 11-1 The collaboration function
The collaboration involves the following parts: the application modules, the track module, and the
detection modules.
z The detection modules monitor the link status, network performance and so on, and inform the
track module of the detection result.
z Upon receiving the detection result, the track module changes the status of the track entry
accordingly and informs the application modules. The track module works between the application
modules and the detection modules and obscures the difference of various detection modules to
provide a unified interface for application modules.
z The application modules then deal with the changes accordingly based on the status of the track
entry, and collaboration is implemented.
The following describes how a static route is monitored through collaboration.
1) NQA monitors the reachability to 192.168.0.88.
2) When 192.168.0.88 becomes unreachable, NQA notifies it to the track module.
3) The track module notifies the state change to the static routing module
4) The static routing module sets the static route as invalid.
For more information about the collaboration and the track module, see Track in the High Availability
Configuration Guide.
Supporting threshold monitoring
NQA supports threshold monitoring for performance parameters such as average delay jitter and packet
round-trip time. The performance parameters to be monitored are called monitored elements. NQA
monitors threshold violations for a monitored element, and reacts to certain measurement conditions,
for example, sending trap messages to the network management server. This helps network
administrators understand the network service quality and network performance.
1) Monitored elements