3Com 3C63400-3AC-C - PathBuilder S700 Switch, Справочное руководство

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238 C
HAPTER
6: P
ATH
B
UILDER
S700 D
IAGNOSTICS AND
P
ERFORMANCE
M
ONITORING
DSX-1/E1 CBR ATM Statistics ATM cell statistics are cell counts since the last
counter reset. On the ATM Statistics window, you can reset the counter by
entering [c]. ATM statistics are displayed as a list rather than a table, as shown
earlier in Figure 174. The DSX-1 and E1 CBR ATM Statistics screens display the
following statistics:
Total Cells Received —Number of cells received and played out (reassembled).
Total Cells Transmitted —Number of cells sent to the cell bus.
Total Cell Pointer Errors —Number of cells dropped due to structure pointer
mismatches.
Total Cells Lost —The difference between the number of cells transmitted and the
number of cells received.
Total Number of Buffer UnderFlows —Number of underrun events.
Total Number of Buffer OverFlows —Number of overrun events.
Total out of Sequence Errors —Number of cells received with out-of-sequence
number mismatch.
Total CRC Errors —Number of cells received with uncorrectable sequence number
CRC error.
Total OAM Cells Received —Number of OAM (Operations, Administration, and
Maintenance) cells received. These cells carry OAM information used for network
management.
Total OAM Cells Transmitted —Number of OAM (Operations, Administration,
and Maintenance) cells transmitted. These cells carry OAM information used for
network management.
Current Cell Status —Cell loss period count (for CBR use only).
Viewing QSIM/HSIM/FAM Statistics
You can view the following types of statistics for the QSIM/HSIM/FAM modules:
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HDLC Statistics
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Frame Relay Statistics (per DLCI)
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ATM VC Statistics (per VCI)
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LMI Statistics
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FAM DS1 Performance Monitoring (FAM module only)
HDLC Statistics The HDLC Statistics screen lists the following statistics:
Received Frames —The total number of received frames with good FCS at this
port.
Transmitted Frames —The total number of successfully-transmitted frames at
this port.
Discarded Invalid Frames —The total number of frames discarded at this port
because they were invalid. Invalid frames are frames that are received with good
FCS but that cannot be processed due to wrong content.
Discarded Congested Frames —The total number of frames discarded at this
port because they were congested. Congested frames are frames that were not
transmitted due to link congestion.