[interfaces]
+ wwan wwan0 {
+     address "dhcp"
+     apn "internet."
+     dhcp-options {
+         default-route-distance "220"
+     }
+ }

[ interfaces wwan wwan0 ]
Traceback (most recent call last):
  File "/usr/libexec/vyos/services/vyos-configd", line 157, in run_script
    script.apply(c)
  File "/usr/libexec/vyos//conf_mode/interfaces_wwan.py", line 152, in apply
    cmd(f'{base_cmd} --simple-disconnect')
  File "/usr/lib/python3/dist-packages/vyos/utils/process.py", line 174, in cmd
    raise OSError(code, feedback)
PermissionError: [Errno 1] failed to run command: mmcli --modem 0 --simple-disconnect
returned: 
exit code: 1

[[interfaces wwan wwan0]] failed
Commit failed

sudo lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 1199:68a2 Sierra Wireless, Inc. MC7710
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[edit]

sh int wwan wwan0 detail 
  --------------------------------
  General  |                 path: /org/freedesktop/ModemManager1/Modem/0
           |            device id: ee588225b915ac2643b9826ebdef05d00e792f7d
  --------------------------------
  Hardware |         manufacturer: Sierra Wireless, Incorporated
           |                model: MC7710
           |    firmware revision: SWI9200X_03.05.29.03ap
           |         h/w revision: MC7710
           |            supported: gsm-umts, lte
           |              current: gsm-umts, lte
           |         equipment id: 358178042347247
  --------------------------------
  System   |               device: /sys/devices/pci0000:00/0000:00:14.0/usb1/1-8
           |              drivers: cdc_mbim
           |               plugin: sierra
           |         primary port: cdc-wdm0
           |                ports: cdc-wdm0 (mbim), wwan0 (net)
  --------------------------------
  Status   |                 lock: sim-pin2
           |       unlock retries: sim-pin2 (3)
           |                state: connected
           |          power state: on
           |          access tech: lte
           |       signal quality: 90% (cached)
  --------------------------------
  Modes    |            supported: allowed: 2g; preferred: none
           |                       allowed: 3g; preferred: none
           |                       allowed: 4g; preferred: none
           |                       allowed: 2g, 3g; preferred: 3g
           |                       allowed: 2g, 3g; preferred: 2g
           |                       allowed: 2g, 4g; preferred: 4g
           |                       allowed: 2g, 4g; preferred: 2g
           |                       allowed: 3g, 4g; preferred: 4g
           |                       allowed: 3g, 4g; preferred: 3g
           |                       allowed: 2g, 3g, 4g; preferred: 4g
           |                       allowed: 2g, 3g, 4g; preferred: 3g
           |                       allowed: 2g, 3g, 4g; preferred: 2g
           |              current: allowed: 3g, 4g; preferred: 4g
  --------------------------------
  Bands    |            supported: egsm, dcs, pcs, utran-1, utran-8, eutran-1, eutran-3, 
           |                       eutran-7, eutran-8, eutran-20
           |              current: egsm, dcs, pcs, utran-1, utran-8, eutran-1, eutran-3, 
           |                       eutran-7, eutran-8, eutran-20
  --------------------------------
  IP       |            supported: ipv4, ipv6, ipv4v6
  --------------------------------
  3GPP     |                 imei: ###############
           |        enabled locks: fixed-dialing, ph-fsim, net-pers, net-sub-pers, 
           |                       provider-pers, corp-pers
           |          operator id: ######
           |        operator name: ######
           |         registration: home
           | packet service state: attached
  --------------------------------
  SIM      |     primary sim path: /org/freedesktop/ModemManager1/SIM/0
  --------------------------------
  Bearer   |                paths: /org/freedesktop/ModemManager1/Bearer/0