Cisco ONS 15454 SDH User Manual page 56

15.7.1 FC_MR-4 Card Performance Monitoring Parameters
15.7.1.2 FC_MR-4 Utilization Window
The Utilization window shows the percentage of transmit (Tx) and receive (Rx) line bandwidth used by
the ports during consecutive time segments. The Utilization window provides an Interval menu 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 * 24) * 8 / 100% interval * maxBaseRate
Tx = (outOctets + outPkts * 24) * 8 / 100% interval * maxBaseRate
The interval is defined in seconds. The maxBaseRate is defined by raw bits per second in one direction
for the port (that is, 1 Gbps or 2 Gbps). The maxBaseRate for FC_MR-4 cards is shown in
Table 15-62 maxBaseRate for STS Circuits
STS
STS-24
STS-48
1. For 1 G of bit rate being transported, there is only 850 Mbps of
Line utilization numbers express the average of ingress and egress traffic as a percentage of capacity.
Note
15.7.1.3 FC_MR-4 History Window
The History window lists past FC_MR-4 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 15-63 FC_MR-4 History Statistics per Time Interval
Time Interval
1 minute
15 minutes
1 hour
1 day (24 hours)
Cisco ONS 15454 SDH Reference Manual, R4.6
15-56
maxBaseRate
850000000
850000000 x 2
actual data because of 8b->10b conversion. Similarly, for 2 G of bit
rate being transported there is only 850 Mbps x 2 of actual data.
Table
Number of Intervals Displayed
60 previous time intervals
32 previous time intervals
24 previous time intervals
7 previous time intervals
1
15-63. The listed parameters are defined in
Chapter 15 Performance Monitoring
Table 15-62.
Table 15-61 on page 15-55.
April 2008