Cisco ONS 15454 SDH Specifications Page 393

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Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Chapter 9 Ethernet Operation
G1000-4 Performance and Maintenance Screens
9.8.1.2 Utilization Window
The Utilization subtab shows the percentage of current and past line bandwidth used by the Ethernet
ports. 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.
9.8.1.3 G Series Utilization Formula
Line utilization is calculated with the following formula:
((inOctets + outOctets) + (inPkts + outPkts) * 20)) * 8 / 100% interval*maxBaseRate * 2.
The interval is defined in seconds. maxBaseRate is defined by raw bits/second in one direction for the
Ethernet port (i.e. 1 Gbps). maxBaseRate is multiplied by 2 in the denominator to determine the raw bit
rate in both directions.
Note Line utilization numbers express the average of ingress and egress traffic as a percentage of capacity.
9.8.1.4 History Window
The Ethernet History subtab 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.
9.8.2 G1000-4 Ethernet Maintenance Screen
When a G1000-4 card is installed in the ONS 15454 SDH, the Maintenance tab under CTC card view
reveals a Maintenance screen with two tabs Loopback and Bandwidth. The Loopback screen allows you
to put an individual G1000-4 port into a Terminal (inward) loopback. The Bandwidth screen displays the
amount of current STM bandwidth the card is using.
Table 9-11 maxBaseRate for STM circuits
VC4 155000000
VC4-2c 311000000
VC4-4c 622000000
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