Reset Physical-Layer Statistics - 3Com CoreBuilder 7000 Management Manual

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HAPTER IEWING
Reset Physical-Layer
Statistics
S
TATISTICS
Table 35 Physical Switch Statistics
Name
SONET loss of pointer
state - LOP
SONET out of cell
delineation state - OCD
SONET line alarm
indication signal state -
Line AIS
SONET path alarm
indication signal state -
Path AIS
SONET line remote defect
indication state - Line RDI
SONET path remote defect
indication state - Path RDI
Resets the physical layer counters for a specified port. Since the HEC
(Header Error Check) counter appears both in the physical layer statistics
(PHY) and the ATM Layer statistics (ATM), this counter will be reset when
you reset either parameter.
Description
Loss of pointer. A loss of pointer defect is declared
when either a valid pointer is not detected in eight
consecutive frames, or when eight consecutive frames
are detected with the New Data Flag (NDF) set to
"1001" without a valid concatenation indicator. A LOP
defect is terminated when either a valid pointer with a
normal NDF set to "0110", or a valid concatenation
indicator is detected for three contiguous frames.
The AIS is an all-ONES characteristic or adapted
information signal. It is generated to replace the normal
traffic signal when it contains a defect condition in
order to prevent consequential downstream failures
being declared or alarms being raised.
AIS can also be identified as:
- AIS-L (Line Alarm Indication Signal)
- SP-AIS (STS Path Alarm Indication Signal)
- VP-AIS (VT Path Alarm Indication Signal)
A signal returned to the transmitting Terminating
Equipment upon detecting a Loss of Signal, Loss of
Frame, or AIS defect. RDI was previously known as FERF.
RDI can also be identified as:
- RDI-L (Line Remote Defect Indication)
- RDI-P (STS Path Remote Defect Indication)
- RDI-V (VT Path Remote Defect Indication)