H3C S5500-EI series Operation Manual page 1280

Operation Manual – NQA
H3C S5500-EI Series Ethernet Switches
II. Supporting the collaboration function
Collaboration is implemented by establishing collaboration entries to monitor the
detection results of the current test group. If the number of consecutive probe failures
reaches a certain limit, NQA's collaboration with other modules is triggered. The
implementation of collaboration is shown in
Application modules
Static routing
Policy routing
Backup center
Backup center
Figure 1-1 Implementation of collaboration
The collaboration here involves three parts: the application modules, the Track module,
and the detection modules.
The detection modules monitor the link status, network performance and so on,
and inform the Track module of the detection result.
Upon receiving the detection result, the Track module changes the status of the
Track object accordingly and informs the application modules. The Track module
works between the application modules and the detection modules and is mainly
used to obscure the difference of various detection modules to provide a unified
interface for application modules.
The application modules then deal with the changes accordingly based on the
status of the Track object, and thus collaboration is implemented.
Take static routing as an example. You have configured a static route with the next hop
192.168.0.88. If 192.168.0.88 is reachable, the static route is valid; if 192.168.0.88 is
unreachable, the static route is invalid. With the collaboration between NQA, Track
module and application modules, real time monitoring of reachability of the static route
can be implemented:
1) Monitor reachability of the destination 192.168.0.88 through NQA.
2) If 192.168.0.88 is detected to be unreachable, NQA will inform the static routing
module through Track module.
3) The static routing module then can know that the static route is invalid.
VRRP
VRRP
Static routing
Policy routing
Figure 1-1.
Detection Detection
modules modules
Track Track
module module
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Chapter 1 NQA Configuration
NQA
NQA
BFD