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Chapter 9
Ethernet Operation
9.6.1 Statistics Screen
The Ethernet statistics screen lists Ethernet parameters at the line level.
parameters. Display the CTC card view for the Ethernet card and click the Performance > Statistics
tabs to display the screen.
Table 9-9
Parameter
Link Status
RX Packets
RX Bytes
TX Packets
TX Bytes
RX Total Errors
RX FCS
RX Alignment
RX Runts
RX Giants
TX Collisions
TX Excessive
TX Deferred
9.6.2 Line Utilization Screen
The Line Utilization screen shows the percentage of line, or port, bandwidth used and the percentage
used in the past. Display the CTC card view and click the Performance and Utilization tabs to display
the screen. From the Interval menu, choose a time segment interval. Valid intervals are 1 minute, 15
minutes, 1 hour, and 1 day. Press Refresh to update the data.
Note
Line utilization numbers express the average of ingress and egress traffic as a percentage of capacity.
9.6.3 History Screen
The Ethernet History screen lists past Ethernet statistics. At the CTC card view, click the Performance
tab and History subtab to view the screen. Choose the appropriate port from the Line menu and the
appropriate interval from the Interval menu. Press Refresh to update the data.
listed parameters.
November 2001
Ethernet Parameters
Meaning
Indicates whether link integrity is present; up means present, and down
means not present
Number of packets received since the last counter reset
Number of bytes received since the last counter reset
Number of packets transmitted since the last counter reset
Number of bytes transmitted since the last counter reset
Total number of receive errors
Number of packets with a Frame Check Sequence (FCS) error. FCS
errors indicate Frame corruption during transmission
Number of packets with alignment errors; alignment errors are
received incomplete frames
Number of packets received that are less than 64 bytes in length
Number of packets received that are greater than 1518 bytes in length
for untagged interfaces and 1522 bytes for tagged interfaces
Number of transmit packets that are collisions; the port and the
attached device transmitting at the same time caused collisions
Number of consecutive collisions
Number of packets deferred
Ethernet Performance and Maintenance Screens
Table 9-9
Cisco ONS 15454 Installation and Operations Guide
defines the
Table 9-9
defines the
9-29
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