# `add_vlan` Command

## Name

`add_vlan`

## Synopsis

```
add_vlan ${card} ${vlan}
```

## Description

Adds an internal network segment with the specified vlan on the specified
card.  For example, `add_vlan xy0 123` has the effect of
`vlans_xy0="${vlans_xy0} 123"`.

The internal implementation prevents adding duplicate VLAN ID's to the same
adaptor, by checking for their presence before adding.  It can safely be
used alongside manual changes to `rc.conf` changes to these variables.

## Examples

```
add_vlan xy0 123 # Creates xy0.123
add_vlan abc3 765 # Creates abc3.765
```

## See Also
 - [`add_net`](add_net.md)
 - [`add_rtadv`](add_rtadv.md)
 - [`add_v4_net`](add_v4_net.md)
 - [`add_v6_net`](add_v6_net.md)
 - [`clone_interface`](clone_interface.md)