The other Low&Mid-end firewalls uses equipment’s serial number apply License, which is the ESN code of the equipment, but when USG9300 applies License, it doesn’t use the ESN code of the equipment.
Because the USG9300 equipment belongs to the double engine and multiple core CPU processing equipment, it involves the equipment’s primary/secondary engine switchover. That is to say, when the main control board has problems, it can through the backup control board to load equipment, so while applying the License, it must submit the serial codes of the main control board and backup control board at the same time, but not the equipment’s ESN code. In addition, when the License has been generated, it must be imported to the main control board and backup control board of the equipment respectively.
We should be familiar with the functions and characteristics of each product and must have much more thinking and confirming.