You may need an Access Point Name (APN) to establish a Packet Data Network (PDN) connection with a wireless carrier. An APN may be required for a cellular data plan configuration. In most cases, your SIM card comes with the carrier's APN, which is retrieved automatically at first connection from FortiExtender. If it doesn't or you are not sure what it is, you must find it out from your carrier and add it when creating a data plan.
Use the following commands to create a data plan:
config lte plan edit <plan name> set modem all set type by-default set apn <carrier apn> next end
A PDN sometimes may not be established without a valid APN. Always be aware of the APN of the SIM card that you are using. If you are not sure, contact your network service provider (NSP) for assistance.