Prevented downtime

SD-WAN monitors leg outages and reports the number of outages and their duration as the downtime prevented by the service. These values can be used as a sales and marketing tool to show how SD-WAN provides a more reliable Internet connection than any of the bond’s individual legs.

Prevented downtime reporting was introduced in 2015.3. To collect information on prevented downtime, you must upgrade bonders to 2015.3 or later.

For example, in a bond with three legs, if one of the legs goes down for one hour, this is reported as one outage and one hour of downtime prevented by SD-WAN. If one leg goes down for an hour, and then a different leg goes down for an hour just before the first leg comes back, this is reported as one outage and two hours of downtime prevented for that bond. Outages on failover legs are not reported as prevented downtime.

Prevented downtime reports are shown for the previous calendar week (Sunday-Saturday) and calendar month, in these locations:

• On the details page for each bond, showing downtime prevented by that bond

• On the dashboard, showing downtime prevented by all the bonds in the user’s current space and its descendants. The values reported on the Dashboard are simply the sums of the values reported for each bond.

• On the space statistics page, showing downtime prevented by the bonds in that space

Only outages of 30 seconds or more, by default, are considered in the prevented downtime calculations. This value can be changed by administrators in the Administration section of the web application.