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Chapter 29: System Maintenance and Administration
Avidia System Configuration and Management User Manual 559
Click Get to update the OAM Loopback Table window. Click and if necessary to view
the entire table. displays the beginning of the table. displays the next page of the table.
The OAM Loopback Table displays the following configuration and status information for
each loopback.
Information Description
Slot
Port
The slot and port from which the loopback was initiated.
VPI The VPI of the VPC or VCC.
VCI The VCI of the VCC for an OAM F5 flow loopback.
Count The configured total number of cells to be sent.
Timeout The configured number of seconds allowed for the looped back cells to return
to the originating device before the loopback is designated as failed.
Delay The configured number of seconds the system waits between transmitted cells.
Flow The type of loopback test that is run:
• F4 loopback tests the circuit at a VPC level.
• F5 loopback tests the circuit at a VCC level.
Type The type of loopback in effect:
• Segment loopbacks test the connectivity between any two uniquely
addressable points in a VPC (F4) or VCC (F5). See page 61 for a list of
segment loopbacks supported.
• End-to-End loopbacks test the connectivity between any uniquely
addressable point in the VPC (F4) or VCC (F5) and any end point (such as a
modem or network end point) where a VPC or VCC terminates. See page 61
for a list of end-to-end loopbacks supported.
Cells Sent The number of cells sent.
Cells Received The number of cells received.
Status The current status of the loopback. Options:
• Null—no loopback has been configured for this PVC.
• In progress—a loopback is currently in progress for this PVC.
• Completed—a loopback was sent and successfully completed for this PVC.
• Aborted—a loopback was sent but was aborted by the user.
• Failed—a loopback was sent but the cells were not received by the source.
• Expired—the status of loopbacks that are completed, aborted or failed
changes to expired after the configured timeout value.The next time an entry
is added to the OAM Loopback Table, the expired loopback entries are
automatically deleted.