Device Backup/Restore

Dea r Team,

we have issue with MAC addredd binding with IP address in the Wireless Manager (NMS).

While replace the faulty AP with new AP. NMS shows old mac address .

Then i  delete the object from NMS and discover again.now ok. i can see the new MAC with same IP address

Anyway i want to know steps to be follow by you to replaced the AP and resotroe the backup