Highlight performance tests provide visibility of key measurements such as round trip time (RTT), packet loss and jitter between two points on your network. These metrics give a great overview of how healthy a connection is and are often the basis of Service Level Agreements (SLA) between provider and customer.

Performance test results are shown graphically in a chart for instant understanding of how network delay changes in relation to the traffic, health and application fluctuations over time.

Performance testing works over most network types and can be measured across specific Classes of Service (when implemented), proving that prioritised applications within an MPLS network are performing correctly. This ongoing visibility can be the basis for future performance tuning, as new applications and requirements are introduced.

When a performance test is in maintenance, you will see a purple background area on the chart and a marker in the sidebar showing:

• the maintenance icon
• the name of the maintenance window ("All Tests" in the image above)
• the time remaining in the maintenance window (2h 40m in the image above). If it's less than one minute remaining, "<1m" shows.
• if you see a number in brackets (2), this means there's more than one maintenance window in effect for this test. The time remaining is when the first maintenance window is due to end. This time will then adjust to show the next maintenance window in effect.

Note: Performance tests in maintenance do not send alerts nor change the colour of heat tiles

Today only

When viewed for today only, the sidebar for each test gives an indication if it is currently impacting the associated heat tile colour. There is an overall colour applied to the Performance Analysis section which applies for the collapsed section also. This overall colour will reflect the test in the worst state.

Green

No issue, this test is not currently impacting heat tile colour

Amber

Issue with duration (2m in the image), this test is currently impacting heat tile colour

Red

Issue with duration (4h in the image), this test is currently impacting heat tile colour

Not today

Controls and axes

Click to collapse or expand the performance chart, or use Expand All/Collapse All in the top header bar

Shown to indicate a performance test, created on this watch with the test type

Target and source descriptions if available otherwise IP addresses or hostnames, hover over the text to view the full text if shortened

2m 

If the test has issues, the duration with show in an amber or red box

If the test is currently in maintenance, this indicator is shown

If the test is discontinued, this indicator is shown, find out more about discontinued SD-WAN tests

Vertical axis

Automatically adjusts to show all the data points for the selected period (day, week or month). Hover on the chart to see exact values.

The adjusted vertical axis means it may not start from 0. A chevron is shown if this is the case.

98%
within
300 ms

The threshold is shown as a horizontal purple line on the chart with the actual threshold value on the far right. The text shows the percentage of tests within threshold.
If configured, a health alert can be sent when the delay goes above the threshold.
If the adjusted vertical axis means the threshold line is not visible then a purple arrow is shown indicating the threshold is above or below the visible chart area.

Horizontal axis

Adjusts according to the selected time period to show hours in day view and days in week and month views; redraws if the time zone is changed at the top right of the Details page.

Zoom options

Drag: click, hold and drag across the chart to zoom into a time period; repeat if needed and   Reset zoom   if complete
Note: all new chart types are synchronised so they zoom in and out together
Click: on a week or month view, click on the chart to jump to that specific day view

Focus All Data

Focus: By default, the chart is scaled to focus on the data. This means show the maximum value data point up to twice the threshold value. Data points above twice the threshold are not shown in Focus mode.
All Data: Toggle to show all data points for the time period. If there are no outliers, then there is no difference between Focus and All Data.

  Reset zoom  

If you click, hold and drag across the chart to zoom in then this button appears in the top right of the chart - click to revert to the full time period, read more about the Zoom options.

ICMP Ping, UDP Echo and TCP Open tests all use the same type of chart:

This chart shows the delay between two points known as the source and the target. A spot is plotted for each test on a day, with the average and min/max shown for week and month. The colour shows the test response compared with the threshold: green when measurements are within threshold turning red when measurements exceed the threshold. The failures line shows a coloured blip representing the percentage packet loss.

Data granularity

Highlight displays the recorded values in the following ways:

Day

Shows up to 6 data points per polling period (usually three minutes)

Week

Shows 24 data points per day (every hour), Average for each hour is shown along with Min/Max values

Month

Shows 6 data points per day (every 4 hours), Average for each period is shown along with Min/Max values

Day view - hover on a point to see timestamp and precise values for up to 6 results per polling period plus the failures percentage. Green dots are tests at or below the threshold, red dots are above the threshold. ∞ indicates a test that timed out/failed

Week or month view - hover on a point to see average, minimum and maximum values plus the failures percentage

From week/month view  Clicking any data point jumps to the selected day view.

Failures

Failures are shown as a coloured blip where packet loss occurred. It's a grey line if unavailable or a thicker green line if available and 0%. Hover on the chart to see timestamp and precise values.

Failures represent the worst case - the number of failures divided by the total number of tests as a percentage.

For example if Highlight collects 6 performance test results in a single poll and 2 of the 6 had failed (33%), an orange blip will be displayed.

Precision Delay and MOS use the same type of chart (with MOS values available only on the MOS test chart):

This chart shows the delay between two points known as the source and the target. The average and min/max are shown for day, week and month. The colour shows the average test response compared with the threshold: green when measurements are within threshold turning red when measurements exceed the threshold. There are 2 or 3 additional blip lines for jitter, loss and MOS.

Data granularity

Each test comprises sending 100 128-byte packets at intervals of 50 milliseconds. Green indicates tests at or below the threshold, red indicates tests above the threshold. Highlight displays the recorded values in the following ways:

Day

Shows a data point per polling period (usually three minutes), Average for each test is shown along with Min/Max values

Week

Shows 24 data points per day (every hour), Average for each hour is shown along with Min/Max values

Month

Shows 6 data points per day (every 4 hours), Average for each period is shown along with Min/Max values

Day, week and month view - hover on a point to see timestamp and precise values per polling period plus the jitter, loss and MOS values

Jitter

Jitter is shown as a colour blip based on the calculated jitter value as a percentage of the configured jitter threshold. It's a grey line if unavailable. It's a thicker green line if available and up to 50% of threshold through to red (100% of threshold). It remains dark red if the threshold is exceeded. Hover on the chart to see timestamp and precise values.

Loss

Loss is shown as a coloured blip where packet loss occurred. It's a grey line if unavailable or a thicker green line if available and 0 - 0.50%. Hover on the chart to see timestamp and precise values.

MOS

Note: MOS is available on the MOS test chart only, not on the Precision Delay chart

MOS is the Mean Opinion Score and a measure of the perceived quality of an audio connection, scored from 1.0 (poor) to 5.0 (excellent) influenced by delay, loss and jitter. Typical configured threshold values are 3.5 or 4.

MOS is shown as a grey line if unavailable or a thicker green line if available and at or above the configured threshold value. It's a red blip when it's below the configured threshold value. Hover on the chart to see timestamp and precise values.

Grey/White backgrounds - Business hours

By default, the chart shows non-business hours with a vertical grey background and business hours with a vertical white background on day and week views. Business hours are not shown on a month view. Toggle off to show alternate horizontal grey and white background areas.

Business hours are the time periods (to the nearest hour) that a business is operational. Highlight uses business hours when displaying charts on the Details page, filtering reporting results and generating alerts. Default values are 06:00 to 18:00 Monday through Friday with Saturday and Sunday excluded. However, you may see different settings if the business hours on a parent folder or location have been changed. Business hours reflect the local time zone for the location.

Find out more about business hours.

Purple backgrounds - Maintenance

Any purple background areas on the chart show current and past maintenance periods. Watches in maintenance do not send alerts, change the colour of heat tiles or decrement the availability figure for the time period.

Find out more about maintenance indicators on the details page.