4 — ONT and MDU statistics and performance monitoring
4-10 November 2013 Alcatel-Lucent 7302 ISAM | 7330 ISAM FTTN | 7360 ISAM FX ONT R04.06.02
Edition 01 3FE 55873 AAAA TCZZA
ONT Product Information Guide
Table 4-4 Supported ONT performance monitoring statistics
Alarm type Interval Montype Counter description
ONTENET
ONTENET statistics
provide a view of data
traffic to and from the
customer UNI, help
detect errors between
the ONT and the CPE,
and are collected and
reported to the OLT via
OMCI
15 min FCSE Count of frame check sequence errors. These are
corrupted frames for which the CRC check failed.
Indicates faulty medium or hardware.
EC Count of excessive collisions. This indicates that a
frame was to be transmitted but was discarded.
Indicates that there may be excessive traffic on the
Ethernet network, and in a very congested state could
lead to service disruption.
LC Count of late collision. Indicates that multiple Ethernet
devices transmitted at the same time. This does not
indicate an issue.
RBO Count of received buffer overflows. Indicates an
internal ONT queue overflow. If the counter continues
to increment, revisit how QoS is configured on the
device.
SCF Count of successfully transmitted single collision
frames. Does not indicate traffic loss. Should be kept to
less than 1% of transmitted Ethernet frames.
MCF Count of successfully transmitted multi-collision
frame. Does not indicate traffic loss. Should be kept to
less than 1% of transmitted Ethernet frames.
DT Count of frames delayed due to deferred transmission.
These are frames sent with a delay. Deferred and
retransmissions should be kept to under 5% of
transmitted Ethernet frames.
IMTE Count of unsuccessfully transmitted frames due to
internal MAC transit errors
CSE Count of carrier sense errors. No carrier is detected for
frame transmission. Indicates a hardware problem.
AE Count of frames with alignment errors. This indicates
that part of an octet is missing and an FCS error.
Indicates faulty medium or hardware.
IMRE Count of unsuccessfully received frames due to internal
MAC receive errors. This indicates an invalid MAC
address in the received frame.
FTL Frames too long. Indicates that the received frame was
between 1518 and 6000 bytes long. Indicates fault
hardware or software from the transmitting device.
TBO Count of transmitted buffer overflows. Indicates an
internal ONT queue overflow. If the counter continues
to increment, revisit how QoS is configured on the
device.
SQE Signal quality errors. Indicates faulty medium or
hardware.
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