- Cisco ONS 15454 Manual

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Cisco ONS 15454 Installation and Operations Guide
November 2001
Chapter 9 Ethernet Operation
Ethernet Performance and Maintenance Screens
9.6.1 Statistics Screen
The Ethernet statistics screen lists Ethernet parameters at the line level. Table 9-9 defines the
parameters. Display the CTC card view for the Ethernet card and click the Performance > Statistics
tabs to display the screen.
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. Table 9-9 defines the
listed parameters.
Table 9-9 Ethernet Parameters
Parameter Meaning
Link Status Indicates whether link integrity is present; up means present, and down
means not present
RX Packets Number of packets received since the last counter reset
RX Bytes Number of bytes received since the last counter reset
TX Packets Number of packets transmitted since the last counter reset
TX Bytes Number of bytes transmitted since the last counter reset
RX Total Errors Total number of receive errors
RX FCS Number of packets with a Frame Check Sequence (FCS) error. FCS
errors indicate Frame corruption during transmission
RX Alignment Number of packets with alignment errors; alignment errors are
received incomplete frames
RX Runts Number of packets received that are less than 64 bytes in length
RX Giants Number of packets received that are greater than 1518 bytes in length
for untagged interfaces and 1522 bytes for tagged interfaces
TX Collisions Number of transmit packets that are collisions; the port and the
attached device transmitting at the same time caused collisions
TX Excessive Number of consecutive collisions
TX Deferred Number of packets deferred