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SLA
Reporting provides a summary view of the performance for PVCs (Permanent
Virtual Circuits) in your US LEC data network: frame relay, ATM or
Internet. SLA Reporting gathers data for every circuit provided by
US LEC and compiles this data into three parts: |
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SLA
Reporting meets the need of organizations for an inexpensive, easy-to-understand
way to monitor their data network’s performance. SLA verification,
performance monitoring, and network management are all enhanced
by use of SLA Reporting, which provides network traffic data in
a clear, understandable graphic format. You can use the information
to supplement your own network management tools.
SLA
Reporting gathers traffic characteristics about data circuits and
summarizes the information in charts and graphs to simplify observation
of your network’s performance. Your data traffic information
is securely distinct from other customers, so that the information
that describes your network is available only to you. US LEC also
uses the same information to manage the performance of its backbone
network, so you can be assured of the accuracy and relevancy of
the reported results.
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The
Volume per Element chart displays the maximum, minimum, and average
total volume observed for all of the elements (circuits) in the group
during the report period. |
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The
chart has the following characteristics: |
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The
vertical axis shows the daily, weekly, or monthly volume in bytes.
The labels on the vertical axis might also include the letter K (for
kilobytes), G (for gigabytes), M (for megabytes) or T (for terabytes).
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The
horizontal axis shows each day in the report period, with the dates
as labels below the tick marks. |
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The
legend shows the notations for the volume and trend line. |
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For
each day, the chart displays the following information: |
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The
volume observed for the most utilized circuit in the group |
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The
volume observed for the least utilized circuit in the group |
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The
average of the daily volumes of all the circuits in the group |
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The
slope of the trend line shows whether the statistical average (least
squares regression) volume is increasing, decreasing, or remaining
constant during the week. In the sample chart, the trend line is flat;
the statistical average volume remained constant over the report period.: |
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Display
the trend in volume for the elements in the group over the report
period, which enables you to document growth trends and to plan for
network expansion. |
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Show
the range of volume for the elements in the group. |
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Visualize
the times that have higher maximum and average volumes, which enables
you to plan the reallocation of processes to times that have lower
maximum and average volume. |
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As
you scan the chart, look for the following indications: |
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If
the maximum, average, and minimum values are
almost the same, the elements had a similar
volume during that time. |
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If
the maximum and minimum values are close,
the group had a small range of volumes. If
the average value is close to the minimum
value, a few elements had a higher volume
than the others. If the average is closer
to the maximum value, a few elements had lower
volume than the others. |
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If
the maximum and minimum values are very far
apart, the elements had significantly different
volumes during that time. If the average value
is close to the minimum value, perhaps one
or a few elements had a significantly higher
volume than the others. If the average is
closer to the maximum value, one or a few
elements had significantly lower volume than
the others. |
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The
Bandwidth Distribution by Element chart displays the average bandwidth
utilization for the report period for each element. |
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The
chart has the following characteristics: |
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The
vertical axis shows the entire week in a percentage format. |
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The
horizontal axis shows each circuit element (in and out are reported
separately) in the group, in order of their utilization during the
week. Reports show the names as labels below each tick mark under
the Availability
report. |
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The
height of a section on a bar indicates the percentage of time during
the week that the element was in a particular average bandwidth utilization.
The color of the section on the bar indicates the bandwidth utilization
range. |
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The
legend shows the bandwidth utilization ranges. The chart uses the
following ranges: |
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>
40% for rates greater than 40.0% |
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20
- 40% for rates greater than 20.0% up to and including 40.0% |
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10
- 20% for rates greater than 10.0% up to and including 20.0% |
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5
- 10% for rates greater than 5.0% up to and including 10.0% |
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<
5% for bandwidth utilization rates up to and including 5.0% |
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This
chart shows the bandwidth utilization metrics for your elements for
the report period. As you scan this chart, look for the following
indications:
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Green
bars indicate that the element operated in
the lowest bandwidth utilization range through
the report period. This element could be underutilized. |
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Bars
that are mostly green with a small percentage
of yellow, orange, or red (which by default
are the mid-utilization ranges) indicate that
the element spent most of the report period
at low utilization, and a small percentage
of time in the moderate to higher utilization
ranges.
Bars that are half green and half red or purple
indicate that the interface had bursty traffic:
the traffic alternated between very low and
very high utilizations. |
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Bars
that are mostly yellow, orange, and red indicate
elements that spent the report period in moderate
to high utilization ranges. |
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Bars
that are purple (which by default is the highest
bandwidth utilization range) indicate that
the elements were operating at very high utilization
rates. For WAN interfaces, this is often the
preferred behavior. For LAN interfaces, this
often indicates over-utilized links that could
be a performance problem for your network. |
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If
the bar does not reach 100%, the report server
might have been stopped, or elements might
not have been available. Refer to the Availability
chart for additional information about the
circuit’s availability during the week. |
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The
Availability chart shows the average availability of each element
over the report period and whether the element met the availability
goal. |
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The
chart has the following characteristics: |
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The
vertical axis is the availability range, which is reported from 90
to 100 percent. |
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The
horizontal axis shows each element in your group or group list. The
chart shows all the elements in the same order as the
Bandwidth Utilization Distribution
report. |
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Reports
show the element names as labels below each tick mark. |
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The
height of the bar shows the average availability for the element over
the report period. The average availability is the average of each
day's availability for the element. Elements that have an average
availability below 90% do not have a bar. |
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The
red line is the availability goal, which is the highest Service Level
range for the Availability variable. |
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The
legend shows the availability goal. |
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As
you review the chart, look for the following patterns:
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The
element met its goal of 99.99% availability. |
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The
element did not meet its goal of 99.99% availability. |
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The
element availability was below 90%. The element
might have had serious availability problems. |
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You
can use this chart to do the following: |
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Document
delivery of service level agreement guarantees |
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Document
average availability over the report period in comparison to the goal
for the element |
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Identify
areas of failure |
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Monitor
the availability for a period of time |
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