My HAP AC was loaded with 6.42.4 and was working with the Verizon Novatel 7730L. I can see the device is listed via the USB resources command, but it does not show up as an interface anymore. I upgraded the firmware to the latest version (6.42.5 as well as the 6.43RC versions), but still does not work. Is there a way to create it manually? I am not sure if it is the HAP AC or Verizon side. A firmware upgrade did occur on the jetpack but haven't checked the lte device in a while as I have been using another WAN link for the past couple of weeks.
/system resource usb print
# DEVICE VENDOR NAME SPEED
0 1-0 Linux 3.3.5 ehci_hcd RB400 EHCI 480
1 1-1 Novatel Wireless MiFi 7730L 480
###Update. I was able to downgrade the HAP AC down to 6.42.3 and still does not work. I am able to tether the 7730L via USB to my Mac and it connects fine and gives me an IP address.
It appears that the HAP AC is no longer compatible with the latest Verizon Novatel MiFi (Firmware version - 3A (L2.74.4 M9x40RNY-3.21.7 1 [2018-05-07 01:02:48])) or the HAP AC possibly could be bad? Maybe the USB port is not operating as it should?