(Chapter 1 fault handling methods 1. Network complexity. General networks include routing, dialing, switching, video, Wan (ISDN, frame relay, ATM,...), LAN, VLAN,... 2. Fault handling model 1. Define the problem to describe the symptoms and potential causes of the fault in detail and accurately. 2. Collect detailed information (gatherfacts) RGT; Information sources: key users, network management systems, routers / switches 1) identify symptoms: 2) reproduce the fault: verify that the fault still exists 3) investigate the fault frequency: 4) determine the fault scope: there are three ways to establish the fault scope? Outside in troubleshooting: usually applicable to multiple hosts that cannot be connected to one)
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