9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. VI-B-49
High switch packet errors will reduce Ethernet traffic throughput, which in turn
may raise Dropped Frame alarms, particulary so where the available bandwidth
was already limited.
Link Failure (DAC ES, DAC GE)
The DAC ES / DAC GE Ethernet port is down. This is a warning alarm.
Probable Cause
No valid Ethernet framing data received on the port.
Recommended Actions
Check the Ethernet connector activity LEDs for the alarmed port.
• If activity is absent, unplug the RJ-45 port cable and plug it into one of the NCC
Ethernet NMS connectors.
• If LED activity on the plugged NMS connector is absent, check connected
equipment and cabling.
• If activity is present (green LED indicates a valid Ethernet connection;
orange flashing indicates Ethernet receive traffic), replace the DAC ES /
DAC GE.
Additional Information
The port Enabled check box in the DAC ES / DAC GE plug-ins screen must be
checked to enable traffic on the port. Only when checked, and no valid framing
data is detected, will this alarm be raised.
Dropped Frames Ratio (DAC ES, DAC GE)
Ratio of dropped frames to total frames has exceeded threshold. Separate alarms
indicate thresholds exceeded for 10%, 20%, 40% or 80%. This is a warning
alarm.
Probable Cause
Inadequate bandwidth on one or both channels.
Recommended Actions
Provide increased bandwidth on the affected channel (increase the number of E1/
DS1 circuits used to transport the channel).
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