ZyXEL P-870MH-C1 User Guide - Page 269
Diagnostic, 26.1 Overview, 26.1.1 What You Can Do in this What You Need to Know
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CHAPTER 26 Diagnostic 26.1 Overview The Diagnostic screens display information to help you identify problems with the Device. The route between a CO VDSL switch and one of its CPE may go through switches owned by independent organizations. A connectivity fault point generally takes time to discover and impacts subscriber's network access. In order to eliminate the management and maintenance efforts, IEEE 802.1ag is a Connectivity Fault Management (CFM) specification which allows network administrators to identify and manage connection faults. Through discovery and verification of the path, CFM can detect, analyze and isolate connectivity faults in bridged LANs. 26.1.1 What You Can Do in this Chapter • The General screen lets you ping an IP address or trace the route packets take to a host (Section 26.4 on page 271). • The 802.1ag screen lets you perform CFM actions (Section 26.4 on page 271). • The OAM Ping Test screen lets you send an ATM OAM (Operation, Administration and Maintenance) packet to verify the connectivity of a specific PVC. (Section 26.4 on page 271). 26.2 What You Need to Know The following terms and concepts may help as you read through this chapter. How CFM Works A Maintenance Association (MA) defines a VLAN and associated Maintenance End Point (MEP) ports on the device under a Maintenance Domain (MD) level. An MEP port has the ability to send Connectivity Check Messages (CCMs) and get other MEP ports information from neighbor devices' CCMs within an MA. CFM provides two tests to discover connectivity faults. P-870HN-5xb User's Guide 269