Allied Telesis AT-S63 - Manual (Page 204)

Chapter 19: SNMPv3
204 Section IV: SNMPv3
SNMPv3 Storage Types
Each SNMPv3 table entry has its own storage type. You can choose
between nonvolatile storage which allows you to save the table entry or
volatile storage which does not allow you to save an entry. If you select the
volatile storage type, when you power off the switch your SNMPv3
configuration is lost and cannot be recovered.
At each SNMPv3 menu, you are prompted to configure a storage type.
You do not have to configure the same storage type value for each table
entry.