The Oam Ping Test Screen - ZyXEL Communications P-660HN-51 - V1.10 Manual

Chapter 29 Diagnostic
The following table describes the fields in this screen.
Table 98 Maintenance > Diagnostic > Ping & TraceRoute & NsLookup
LABEL
URL or IP
Address
Ping
TraceRoute
Nslookup

29.3 The OAM Ping Test Screen

Click Maintenance > Diagnostic > OAM Ping Test to open the screen shown
next. Use this screen to perform an OAM (Operation, Administration and
Maintenance) F4 or F5 loopback test on a PVC. The ZyXEL Device sends an OAM
F4 or F5 packet to the DSLAM or ATM switch and then returns it to the ZyXEL
Device. The test result then displays in the text box.
ATM sets up virtual circuits over which end systems communicate. The
terminology for virtual circuits is as follows:
• Virtual Channel (VC) Logical connections between ATM devices
• Virtual Path (VP)
• Virtual Circuits
Figure 127 Virtual Circuit Topology
Think of a virtual path as a cable that contains a bundle of wires. The cable
connects two points and wires within the cable provide individual circuits between
the two points. In an ATM cell header, a VPI (Virtual Path Identifier) identifies a
link formed by a virtual path; a VCI (Virtual Channel Identifier) identifies a
channel within a virtual path. A series of virtual paths make up a virtual circuit.
272
DESCRIPTION
Type the IP address of a computer that you want to perform ping,
traceroute, or nslookup in order to test a connection.
Click this to ping the IP address that you entered.
Click this button to perform the traceroute function. This determines the
path a packet takes to the specified computer.
Click this button to perform a DNS lookup on the IP address of a computer
you enter.
A bundle of virtual channels
A series of virtual paths between circuit end points
Segment
ATM Switch
Virtual Path
Virtual Circuit (End-to-End)
Virtual Channel
P-660HN-51 User's Guide