Allied Telesis AT-S63 - Manual (Page 244)

Chapter 16: SNMPv3
244 Section II: Advanced Features
NonVolatile
Select this storage type if you want the ability to save an entry in
the Target Address Table. After making changes to an Target
Address Table entry with a NonVolatile storage type, Save
Changes appears on the General tab. Allied Telesyn recommends
this storage type.
13. Click Apply to update the SNMPv3 Target Address Table.
14. To save your changes, return to the General tab and click Save
Changes.