FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
Felizardo
Staff
Staff
Article Id 417454
Description

This article describes how to troubleshoot the FortiGate 50G-5G modem flapping issue with Strong Signal.

Scope FortiGate 50G-5G.
Solution

Consider the manual carrier-config below:

 

config system 5g-modem
    config data-plan
        edit "vodafone"
            set apn "internet"
        next
    end
    config modem1
        set network-type 4g|5g
        set sim1-pin 1234
        set sim1-data-plan "vodafone"
        set carrier-config manual
    end
end

execute 5g-modem carrier-config switch 1 <----- Generic PTCRB.

 

Despite having set the carrier-config manually, the nr5gd debug below shows constant flapping:


[NR5G_MODEM1]MDM_IPV4_drop(1106)-1653: MDM_IPV4_drop event triggered, current state:ST_MODEM_CONNECTED
[NR5G_MODEM1]modem1_ipv4_data_call_cb(2707)-1653: data call status QMI_WDS_DATA_CALL_TERMINATED
[NR5G_MODEM1]MDM_IPV4_drop(1106)-1653: MDM_IPV4_drop event triggered, current state:ST_MODEM_CONNECTED
[NR5G_MODEM1]modem1_ipv4_data_call_cb(2707)-1653: data call status QMI_WDS_DATA_CALL_TERMINATED

 

To proceed with the troubleshooting process, gather the information below and open a ticket with TAC Support:

  1. Collect nr5gd debug:

 

diagnose debug disable
diagnose debug reset
diagnose debug console time enable
diagnose debug application nr5gd -1
diagnose debug enable

 

To disable the debug, use the command:

 

diagnose debug disable

 

  1. Configuration file.
  2. TAC report.
  3. System event logs.

 

This issue will be resolved in v7.4.10 and v7.6.5.