// Level required to display an aura.
// NOTE: This assumes that sending max_lv to the client will display the aura.
// NOTE: aura_lv must not be less than max_lv.
// Example: If max_lv is 99 and aura_lv is 150, characters with level 99~149
// will be sent as being all level 98, and only characters with level
// 150 or more will be reported as having level 99 and show an aura.
aura_lv: 99
The tag max_lv the client.conf has to be equal to the aura_lv so please compatibility.
Wolf's post in How to make other player see aura when max level?..? was marked as the answer