Hi,

Vyos version 2025.11, 2026.02 and also rolling 2026.08.05-0033 has the issue where as the apply of wwan interface takes longer than 25seconds.

When that happens apply fails and does a disconnect.

ModemManager taking longer than 25 seconds:
Aug 07 22:22:20 vyos ModemManager[2427]: [1786141340.772239] ModemManager (version 1.20.4) starting in system bus...
Aug 07 22:22:23 vyos ModemManager[2427]: [1786141343.422257] [base-manager] couldn't check support for device '/sys/devices/pci0000:00/0000:00:1c.2/0000:04:00.0': not supported by any plugin
Aug 07 22:22:23 vyos ModemManager[2427]: [1786141343.422380] [base-manager] couldn't check support for device '/sys/devices/pci0000:00/0000:00:1c.3/0000:05:00.0': not supported by any plugin
Aug 07 22:22:23 vyos ModemManager[2427]: [1786141343.422463] [base-manager] couldn't check support for device '/sys/devices/pci0000:00/0000:00:1c.4/0000:07:00.0': not supported by any plugin
Aug 07 22:22:23 vyos ModemManager[2427]: [1786141343.423659] [base-manager] couldn't check support for device '/sys/devices/pci0000:00/0000:00:1c.6/0000:06:00.0': not supported by any plugin and then it try to run mmcli which doesn't work. Later this happens:
Aug 07 22:22:47 vyos ModemManager[2427]: [1786141367.146975] [device /sys/devices/pci0000:00/0000:00:14.0/usb2/2-2] creating modem with plugin 'quectel' and '6' ports
Aug 07 22:22:47 vyos ModemManager[2427]: [1786141367.150278] [plugin/quectel] could not grab port ttyUSB1: Cannot add port 'tty/ttyUSB1', unhandled port type
Aug 07 22:22:47 vyos ModemManager[2427]: [1786141367.150332] [plugin/quectel] could not grab port ttyUSB0: Cannot add port 'tty/ttyUSB0', unhandled port type
Aug 07 22:22:47 vyos ModemManager[2427]: [1786141367.151639] [base-manager] modem for device '/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2' successfully created running the commit for the wwan is too soon or i don't know