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Modem detection issues might occur due to various factors, which can be resolved through LTE modem's cold reboot ('execute lte-modem cold-reboot') and will not lead to a FortiGate restart. If issues persist, try to enable sim-hot-swap as shown below:
config system lte-modem
set sim-hot-swap enable
end
The following are the troubleshooting commands that should be sent if the ticket needs to be opened related to modem detection issue:
get system status
get system performance status
get hardware status
execute sensor list
fnsysctl ifconfig wwan
show full system lte-modem
diagnose hardware sysinfo memory
diagnose sys session stat
diagnose sys lte-modem modem-details
diagnose sys lte-modem sim-info
diagnose sys lte-modem signal
diagnose sys lte-modem data-usage
diagnose sys lte-modem data-session
diagnose sys lte-modem data-session-info
execute lte-modem wireless-profile list
diagnose test application lted 5
diagnose test application lted 3 <----- Test connection.
diagnose test application lted 4 <-----Test disconnection.
diagnose test application lted 3
diagnose test application lted 19
diagnose test application lted 20
diagnose test application lted 8
diagnose test application lted 23
diagnose test application lted 9
diagnose debug crashlog read
diagnose debug reset
diagnose debug enable
diagnose debug application lted -1
Wait for at least 5 minutes and reboot the modem.
execute lte-modem cold-reboot
Collect the crashlog as well, disable the debugging, and attach the debug output to the ticket.
diagnose debug crashlog read
diagnose debug reset
Enable LTE Debugging. To gather more detailed information for troubleshooting, enable LTE debugging using the following commands:
diagnose debug disable
diagnose debug reset
diagnose debug console time enable
diagnose debug application lted -1
diagnose debug enable
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