Alcatel-Lucent 7450 Quality Of Service Manual page 521

The reduced ability to determine the time of congestion if the reading interval is too long is
shown in
examples) can represent different congestion patterns that occur at different times between
the two consecutive reads. The congestion pattern, or the exact time of congestion cannot be
determined from the reading itself. The reading only indicates that the congestion occurred x
number of times between the two consecutive readings. In the example shown in
Figure
time during a one day period without being able to pinpoint the exact time of congestion
within the one day period. To determine the time of the congestion more accurately, the
operator must collect the information more frequently. For example, if the information is
collected every 30 minutes, then the operator can determine the part of the day during which
congestion occurred within 30 minutes of accuracy.
Vport configured bandwidth [kbps]
Quality of Service Guide
Figure 30, Figure
31, and Figure 32, an operator can decipher that the link was congested 20% of the
Figure 30: Determining the Time of Congestion (Example 1)
Vport Offered
Load
Monitor-threshold [%]
31, and Figure 32. It can be seen that the same readings (in the 3
1 Day
Read
Samples above the threshold: 20K
Total samples:
QoS Scheduler Policies
Time
Read
100K
al_0743
Figure 30,
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