What's the difference between the privilege level 8~14 and level 15 ?
Basically, the privilege's level can be configured from 0 to 15, and we can divide the privilege level into three parts.
Level 0 to 7 is for the normal user.
Level 8 to 14 is for the manager. This level cannot configure several functions which belong to level 15. EX: DHCPSNP, IPSG, AAA.
Level 15 is the top level for the administrator. And, this level can configure all functions of the switch. Also, administrator may add/remove the commands to/from user privilege 0~14.