No dhcpoffer on HL Serie

Stefan Gruber sgruber at
Wed Jan 17 13:39:51 UTC 2018

I am working with a HL Module from Sierra Wireless on an embedded Debian System (so not all modules are include). I can configure it on PPP and get access to the Internet.
But I have problems with the MBIM Interface.
I get a cdc-wdm0 device and try to get it up with mbim-network.

mbim-network /dev/cdc-wdm0 start
Loading profile...
    APN: internet.telekom
Querying subscriber ready status 'mbimcli -d /dev/cdc-wdm0 --query-subscriber-ready-status --no-close'...
[/dev/cdc-wdm0] Subscriber ready status retrieved: Ready state: 'initialized' Subscriber ID: 'somethin' SIM ICCID: 'alsosomethin' Ready info: 'unknown' Telephone numbers: (1) '+49??' [/dev/cdc-wdm0] Session not closed: TRID: '3'
Saving state... (TRID: 3)
Querying registration state 'mbimcli -d /dev/cdc-wdm0 --query-registration-state --no-open=3 --no-close'...
[/dev/cdc-wdm0] Registration status: Network error: 'unknown' Register state: 'home' Register mode: 'automatic' Available data classes: 'gprs, edge' Current cellular class: 'gsm' Provider ID: '26201' Provider name: '' Roaming text: 'unknown' Registration flags: 'packet-service-automatic-attach' [/dev/cdc-wdm0] Session not closed: TRID: '4'
Saving state... (TRID: 4)
Attaching to packet service with 'mbimcli -d /dev/cdc-wdm0 --attach-packet-service --no-open=4 --no-close'...
Saving state... (TRID: 5)
Starting network with 'mbimcli -d /dev/cdc-wdm0 --connect=internet.telekom --no-open=5 --no-close'...
Network started successfully

My /etc/mbim-network.conf:


When I now want a IP I use dhclient

dhclient -v wwan0
Internet Systems Consortium DHCP Client 4.3.1
Copyright 2004-2014 Internet Systems Consortium.
All rights reserved.
For info, please visit

Listening on LPF/wwan0/16:f4:54:ec:7e:35
Sending on   LPF/wwan0/16:f4:54:ec:7e:35
Sending on   Socket/fallback
DHCPDISCOVER on wwan0 to port 67 interval 5
DHCPDISCOVER on wwan0 to port 67 interval 14
DHCPDISCOVER on wwan0 to port 67 interval 7
DHCPDISCOVER on wwan0 to port 67 interval 8
DHCPDISCOVER on wwan0 to port 67 interval 13
DHCPDISCOVER on wwan0 to port 67 interval 13
No DHCPOFFERS received.
No working leases in persistent database - sleeping.

And I have no access to the internet...

When I use ModemManager I get the same. Here are the Outputs:

mmcli -m 0 -e
successfully enabled the modem
mmcli -m 0

/org/freedesktop/ModemManager1/Modem/0 (device id '467fb43f937df307bb12c8a99bca3
  Hardware |   manufacturer: 'Generic'
           |          model: 'MBIM [8087:0911]'
           |       revision: 'M2M_7160_MBIM_CAT1_WW_01.1710.'
           |      supported: 'gsm-umts, lte'
           |        current: 'gsm-umts, lte'
           |   equipment id: 'fgdsg34'
  System   |         device: '/sys/devices/soc0/soc/2100000.aips-bus/2184000.usb
           |        drivers: 'cdc_acm, cdc_mbim'
           |         plugin: 'Generic'
           |   primary port: 'cdc-wdm0'
           |          ports: 'cdc-wdm0 (mbim), wwan0 (net), ttyACM0 (at)'
  Numbers  |           own : 'dsfg3'
  Status   |           lock: 'none'
           | unlock retries: 'sim-pin2 (3)'
           |          state: 'registered'
           |    power state: 'on'
           |    access tech: 'gprs, edge'
           | signal quality: '0' (cached)
  Modes    |      supported: 'allowed: 2g, 3g, 4g; preferred: none'
           |        current: 'allowed: 2g, 3g, 4g; preferred: none'
  Bands    |      supported: 'unknown'
           |        current: 'unknown'
  IP       |      supported: 'ipv4, ipv6, ipv4v6'
  3GPP     |           imei: 'fu6tr65'
           |  enabled locks: 'sim, fixed-dialing'
           |    operator id: '26201'
           |  operator name: ''
           |   subscription: 'unknown'
           |   registration: 'home'
  SIM      |           path: '/org/freedesktop/ModemManager1/SIM/0'

  Bearers  |          paths: 'none'

mmcli -m 0 --simple-connect="apn=internet.telekom"
successfully connected the modem

When I now run dhclient I get the same like above except with another MAC of wwan0

Listening on LPF/wwan0/86:c9:99:98:f1:4f
Sending on   LPF/wwan0/86:c9:99:98:f1:4f
Sending on   Socket/fallback

Should I configure the gateway + DNS of the wwan0 Interface manually? I can myself not explain what I am doing wrong.
I read somewhere they use a 4G Dongle on a Raspberry and use usb_modeswitch to enter QMI mode...
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