Abstract
Previous approaches have used fault injection to evaluate the distributed system's dependability by targeting the application and hardware layers. In this paper, we delve on the communication layer services which are located between the two previous layers. We provide the specification of the assessment components: fault injection, architectural structure of the workload, and dependability measures. We have examined the use of fault injections to evaluate the dependability of a transport layer protocol (i.e. TCP) with a random study. We focus on the congestion control service, then, we define workload, faultload and dependability measures. We show that the communication is interrupted after exceeding a given tolerance threshold (below this limit, the service employs a recovery time to resume execution). We conclude that congestion control is robust to port fields; however, fault injections to the window size and flag fields hang the service. The test bed is carried out through the simulator NS-3.
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