Cisco Systems 15454 15.6.1.2 E-Series Ethernet Utilization Window, 15.6.1.3 E-Series Ethernet History Window

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Cisco ONS 15454 Reference Manual, R7.0
78-17191-01
Chapter 15 Performance Monitoring
15.6 15.6.1 E-Series Ethernet Card Performance Monitoring Parameters
15.6.1.2 E-Series Ethernet Utilization Window
The Utilization window shows the percentage of transmit (Tx) and receive (Rx) line bandwidth used by
the Ethernet ports during consecutive time segments. The Mode field displays the real-time mode status,
such as 100 Full, which is the mode setting configured on the E-Series port. However, if the E-Series
port is set to autonegotiate the mode (Auto), this field shows the result of the link negotiation between
the E-Series and the peer Ethernet device attached directly to the E-Series port.
The Utilization window provides an Interval drop-down list that enables you to set time intervals of
1 minute, 15 minutes, 1 hour, and 1 day. Line utilization is calculated with the following formulas:
Rx = (inOctets + inPkts * 20) * 8 / 100% interval * maxBaseRate
Tx = (outOctets + outPkts * 20) * 8 / 100% interval * maxBaseRate
The interval is defined in seconds. The maxBaseRate is defined by raw bits per second in one direction
for the Ethernet port (that is, 1 Gbps). The maxBaseRate for E-Series Ethernet cards is shown in
Table 15-14.
Note Line utilization numbers express the average of ingress and egress traffic as a percentage of capacity.
Note The E-Series Ethernet card is a Layer 2 device or switch and supports Trunk Utilization statistics. The
Trunk Utilization statistics are similar to the Line Utilization statistics, but shows the percentage of
circuit bandwidth used rather than the percentage of line bandwidth used. The Trunk Utilization statistics
are accessed through the card view Maintenance tab.
15.6.1.3 E-Series Ethernet History Window
The Ethernet History window lists past Ethernet statistics for the previous time intervals. Depending on
the selected time interval, the History window displays the statistics for each port for the number of
previous time intervals as shown in Table 1 5-15 . The parameters are defined in Table 15-13 on
page 15-29.
Table 15-14 maxBaseRate for STS Circuits
STS maxBaseRate
STS-1 51840000
STS-3c 155000000
STS-6c 311000000
STS-12c 622000000
Table 15-15 Ethernet History Statistics per Time Interval
Time Interval Number of Previous Intervals Displayed
1 minute 60
15 minutes 32
1 hour 24
1 day (24 hours) 7