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# 12 Host availability

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#### Overview

In the host availability widget, high-level statistics about host
availability are displayed in colored columns/lines, depending on the chosen layout.

Horizontal display (columns):

![](../../../../../../assets/en/manual/web_interface/frontend_sections/dashboards/availability_h.png)

Vertical display (lines):

![](../../../../../../assets/en/manual/web_interface/frontend_sections/dashboards/availability_v.png)

Host availability in each column/line is counted as follows:

-   *Available* - hosts with all interfaces available
-   *Not available* - hosts with all interfaces not available
-   *Mixed* - hosts with at least one interface unavailable and at least one either available
or unknown; others can have any value, including "unknown"
-   *Unknown* - hosts with at least one interface unknown (none
    unavailable)
-   *Total* - total of all hosts

::: noteclassic
For Zabbix agent (active checks), the *Mixed* cell will always be empty since this type of items cannot have multiple interfaces.
:::

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#### Configuration

To configure, select *Host availability* as type:

![](../../../../../../assets/en/manual/web_interface/frontend_sections/monitoring/host_availability.png){width="600"}

In addition to the parameters that are [common](/manual/web_interface/frontend_sections/dashboards/widgets#common-parameters) 
for all widgets, you may set the following specific options:

|   |   |
|--|--------|
|*Host groups*|Select host groups.<br>Alternatively, select a compatible widget as the [data source](/manual/web_interface/frontend_sections/dashboards/widgets/#dynamic-parameters) for host groups.<br>This field is auto-complete, so starting to type the name of a group will offer a dropdown of matching groups.<br>This parameter is not available when configuring the widget on a [template dashboard](/manual/config/templates/template#adding-dashboards).|
|*Interface type*|Select which host interfaces you want to see availability data for.<br>Availability of all interfaces is displayed by default if nothing is selected.|
|*Layout*|Select horizontal display (columns) or vertical display (lines).|
|*Include hosts in maintenance*|Include hosts that are in maintenance in the statistics.<br>This parameter is labeled *Show data in maintenance* when configuring the widget on a [template dashboard](/manual/config/templates/template#adding-dashboards).|
|*Show only totals*|If checked, the total of hosts, without breakdown by interfaces, is displayed. This option is disabled if only one interface is selected.|

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