ZyXEL P-870MH-C1 User Guide - Page 270
The General Diagnostic Screen
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Chapter 26 Diagnostic • Loopback test - checks if the MEP port receives its Loop Back Response (LBR) from its target after it sends the Loop Back Message (LBM). If no response is received, there might be a connectivity fault between them. • Link trace test - provides additional connectivity fault analysis to get more information on where the fault is. If an MEP port does not respond to the source MEP, this may indicate a fault. Administrators can take further action to check and resume services from the fault according to the line connectivity status report. 26.3 The General Diagnostic Screen Click Maintenance > Diagnostic to open the screen shown next. Ping and traceroute help check availability of remote hosts and also help troubleshoot network or Internet connections. Figure 153 Maintenance > Diagnostic > General 270 P-870HN-5xb User's Guide