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The OAM Loopback Table displays the following configuration and status information for
each loopback.
Information
Slot
Port
VPI
VCI
Count
Timeout
Delay
Flow
Type
Cells Sent
Cells Received
Status
Avidia System Configuration and Management User Manual
OAM Loopback Table
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Description
The slot and port from which the loopback was initiated.
The VPI of the VPC or VCC.
The VCI of the VCC for an OAM F5 flow loopback.
The configured total number of cells to be sent.
The configured number of seconds allowed for the looped back cells to return
to the originating device before the loopback is designated as failed.
The configured number of seconds the system waits between transmitted cells.
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.
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
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
for a list of end-to-end loopbacks supported.
The number of cells sent.
The number of cells received.
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.
Chapter 29: System Maintenance and Administration
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