This is the name of the cdot11SecAuxSsidVlan. Either
cdot11SecAuxSsidVlan or cdot11SecAuxSsidVlanName can
be used to set the VLAN trunk for client traffic of
this SSID. If both cdot11SecAuxSsidVlanName and
cdot11SecAuxSsidVlan are set in a query, the set query
will succeed if only if there is a matching pair of
cdot11SecVlanName and cdot11SecVlanNameId in the
cdot11SecVlanNameTable.
The default value is a blank string, no VLAN or VLAN
name is configured or used for this SSID.