Hello everyone,
I've tried to establish a connection using ModemManager through LTE network
and haven't succeed in it. However, I am able to successfully set up an
internet connection manually, given the same conditions but without
ModemManager, applying the steps suggested in Sec. 5.10.2 of [1]:
AT+CFUN=4
AT+UCGDFLT=1,"IP","internet.t-mobile.cz" -- sets the default PDP context which
is applied right after a registration.
AT+CFUN=1
When I use ModemManager (mmcli -m0
--simple-connect="apn=internet.t-mobile.cz"), it apparently configures a PDP
context in the same way as for 3G/2G networks. The modem gets an IP and DNS
addresses, but pings are not passing through it.. Please, see the logs and the
modem info below.
root@zynq7:~# mmcli -m 0
/org/freedesktop/ModemManager1/Modem/0 (device id
'9be611a4f382a582972f20fa86efbaa8f6b02918')
-------------------------
Hardware | manufacturer: 'u-blox'
| model: 'TOBY-L210'
| revision: '15.63'
| H/W revision: 'unknown'
| supported: 'gsm-umts, lte'
| current: 'gsm-umts, lte'
| equipment id: '###############'
-------------------------
System | device:
'/sys/devices/soc0/amba/e0002000.usb/ci_hdrc.0/usb1/1-1/1-1.2'
| drivers: 'cdc_ether, cdc_acm'
| plugin: 'u-blox'
| primary port: 'ttyACM0'
| ports: 'ttyACM0 (at), ttyACM1 (at), ttyACM2 (at), wwan0
(net)'
-------------------------
Numbers | own : 'unknown'
-------------------------
Status | lock: 'none'
| unlock retries: 'sim-pin (3), sim-pin2 (3), sim-puk (10), sim-puk2
(10)'
| state: 'searching'
| power state: 'on'
| access tech: 'unknown'
| signal quality: '40' (recent)
-------------------------
Modes | supported: 'allowed: 2g; preferred: none
| allowed: 2g, 3g; preferred: none
| allowed: 2g, 3g; preferred: 2g
| allowed: 2g, 3g; preferred: 3g
| allowed: 3g; preferred: none
| allowed: 4g; preferred: none
| allowed: 2g, 3g, 4g; preferred: none
| allowed: 2g, 3g, 4g; preferred: 2g
| allowed: 2g, 3g, 4g; preferred: 3g
| allowed: 2g, 3g, 4g; preferred: 4g
| allowed: 2g, 4g; preferred: none
| allowed: 2g, 4g; preferred: 2g
| allowed: 2g, 4g; preferred: 4g
| allowed: 3g, 4g; preferred: none
| allowed: 3g, 4g; preferred: 3g
| allowed: 3g, 4g; preferred: 4g'
| current: 'allowed: 4g; preferred: none'
-------------------------
Bands | supported: 'egsm, dcs, pcs, g850, utran-1, utran-3, utran-4,
utran-6, utran-5, utran-8, utran-2, utran-7, eutran-1, eutran-2, eutran-3,
eutran-4, eutran-5, eutran-7, eutran-8, eutran-11, eutran-13, eutran-17,
eutran-20, utran-11'
| current: 'egsm, pcs, g850, utran-1, utran-5, utran-8,
utran-2, eutran-1, eutran-2, eutran-5, eutran-8'
-------------------------
IP | supported: 'ipv4, ipv6, ipv4v6'
-------------------------
3GPP | imei: '###############'
| enabled locks: 'none'
| operator id: 'unknown'
| operator name: 'unknown'
| subscription: 'unknown'
| registration: 'idle'
| EPS UE mode: 'csps-2'
-------------------------
SIM | path: '/org/freedesktop/ModemManager1/SIM/0'
-------------------------
Bearers | paths: 'none'
root@zynq7:~# mmcli -b 0
Bearer '/org/freedesktop/ModemManager1/Bearer/0'
-------------------------
Status | connected: 'yes'
| suspended: 'no'
| interface: 'wwan0'
| IP timeout: '20'
-------------------------
Properties | apn: 'internet.t-mobile.cz'
| roaming: 'allowed'
| IP type: 'none'
| user: 'none'
| password: 'none'
| number: 'none'
| Rm protocol: 'unknown'
-------------------------
IPv4 configuration | method: 'dhcp'
| address: '100.90.53.103'
| prefix: '32'
| gateway: '100.90.53.103'
| DNS: '93.153.117.49', '93.153.117.17'
-------------------------
IPv6 configuration | method: 'unknown'
-------------------------
Stats | Duration: '3330'
| Bytes received: 'N/A'
| Bytes transmitted: 'N/A'
Log:
[1541095858.128950] Simple connect started...
[1541095858.129087] PIN: unspecified
[1541095858.129146] Operator ID: unspecified
[1541095858.129204] Allowed roaming: yes
[1541095858.129259] APN: internet.t-mobile.cz
[1541095858.129315] IP family: unspecified
[1541095858.129368] Allowed authentication: unspecified
[1541095858.129420] User: unspecified
[1541095858.129471] Password: unspecified
[1541095858.129524] Number: unspecified
[1541095858.129566] Simple connect state (4/8): Wait to get fully enabled
[1541095858.129851] Simple connect state (5/8): Register
[1541095858.130018] Already registered in network '26201', automatic
registration not launched...
[1541095858.130160] Simple connect state (6/8): Bearer
[1541095858.130242] Creating new bearer...
[1541095858.130344] u-blox: checking current USB profile...
[1541095858.130433] (ttyACM0) device open count is 2 (open)
[1541095858.130621] (ttyACM0): --> 'AT+UUSBCONF?<CR>'
[1541095858.140006] (ttyACM0): <-- '<CR><LF>+UUSBCONF:
2,"ECM",,"0x1143"<CR><LF>'
[1541095858.140526] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
[1541095858.140912] u-blox: usb profile loaded: ecm
[1541095858.140981] u-blox: checking current networking mode...
[1541095858.141072] (ttyACM0) device open count is 3 (open)
[1541095858.141186] (ttyACM0) device open count is 2 (close)
[1541095858.141312] (ttyACM0): --> 'AT+UBMCONF?<CR>'
[1541095858.153827] (ttyACM0): <-- '<CR><LF>+UBMCONF: 1<CR><LF>'
[1541095858.155688] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
[1541095858.156051] u-blox: networking mode loaded: router
[1541095858.156120] u-blox: creating u-blox broadband bearer (ecm profile,
router mode)...
[1541095858.158948] (ttyACM0) device open count is 3 (open)
[1541095858.159090] (ttyACM0) device open count is 2 (close)
[1541095858.159433] u-blox: new u-blox broadband bearer created at DBus path
'/org/freedesktop/ModemManager1/Bearer/0'
[1541095858.161586] Simple connect state (7/8): Connect
[1541095858.161719] Connecting bearer '/org/freedesktop/ModemManager1/Bearer/0'
[1541095858.161841] Modem /org/freedesktop/ModemManager1/Modem/0: state changed
(registered -> connecting)
[1541095858.165640] Launching 3GPP connection attempt with APN
'internet.t-mobile.cz'
[1541095858.165760] No specific IP family requested, defaulting to ipv4
[1541095858.165833] No specific IP family requested, defaulting to ipv4
[1541095858.165893] Looking for best CID...
[1541095858.166041] (ttyACM0) device open count is 3 (open)
[1541095858.166219] (ttyACM0) device open count is 2 (close)
[1541095858.166340] (ttyACM0): --> 'AT+CGDCONT?<CR>'
[1541095858.181561] (ttyACM0): <-- '<CR><LF>+CGDCONT:
4,"IP","IMS.MNC001.MCC230.GPRS","100.71.189.48",0,0,0,0,0,0<CR><LF>'
[1541095858.182167] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
[1541095858.182568] Found '1' PDP contexts
[1541095858.182636] PDP context [cid=4] [type='ipv4']
[apn='IMS.MNC001.MCC230.GPRS']
[1541095858.183035] Using empty CID 5 with PDP type 'ipv4'
[1541095858.183166] (ttyACM0) device open count is 3 (open)
[1541095858.183284] (ttyACM0) device open count is 2 (close)
[1541095858.183412] (ttyACM0): -->
'AT+CGDCONT=5,"IP","internet.t-mobile.cz"<CR>'
[1541095858.208571] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
[1541095858.208902] checking supported authentication methods...
[1541095858.209015] (ttyACM0) device open count is 3 (open)
[1541095858.209150] (ttyACM0) device open count is 2 (close)
[1541095858.209283] (ttyACM0): --> 'AT+UAUTHREQ=?<CR>'
[1541095858.214173] (ttyACM0): <-- '<CR><LF>+UAUTHREQ: (1-8),(0-2),,<CR><LF>'
[1541095858.214660] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
[1541095858.214933] Not using authentication
[1541095858.215014] setting up authentication preferences in PDP context #5...
[1541095858.215111] (ttyACM0) device open count is 3 (open)
[1541095858.215229] (ttyACM0) device open count is 2 (close)
[1541095858.215362] (ttyACM0): --> 'AT+UAUTHREQ=5,0,"",""<CR>'
[1541095858.228421] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
[1541095858.228664] activating PDP context #5...
[1541095858.228771] (ttyACM0) device open count is 3 (open)
[1541095858.228887] (ttyACM0) device open count is 2 (close)
[1541095858.229018] (ttyACM0): --> 'AT+CGACT=1,5<CR>'
[1541095858.679091] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
[1541095858.679468] gathering gateway information for PDP context #5...
[1541095858.679573] (ttyACM0) device open count is 3 (open)
[1541095858.679703] (ttyACM0) device open count is 2 (close)
[1541095858.679826] (ttyACM0): --> 'AT+UIPADDR=5<CR>'
[1541095858.895104] (ttyACM0): <-- '<CR><LF>+UIPADDR:
5,"ccinet4","100.90.53.103","255.255.255.0","",""<CR><LF>'
[1541095858.896432] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
[1541095858.896811] IPv4 gateway address retrieved: 100.90.53.103
[1541095858.896890] gathering IP and DNS information for PDP context #5...
[1541095858.896983] (ttyACM0) device open count is 3 (open)
[1541095858.897093] (ttyACM0) device open count is 2 (close)
[1541095858.897218] (ttyACM0): --> 'AT+CGCONTRDP=5<CR>'
[1541095858.902575] (ttyACM0): <-- '<CR><LF>+CGCONTRDP:
5,6,"internet.t-mobile.cz.MNC001.MCC230.GPRS","'
[1541095858.903034] (ttyACM0): <--
'100.90.53.103.255.255.255.255","100.90.53.103","93.153.117.49","93.153.117.17","0.0.0.0","0.0.0.
[1541095858.903398] (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
[1541095858.903792] IPv4 address retrieved: 100.90.53.103
[1541095858.903863] IPv4 subnet retrieved: 255.255.255.255
[1541095858.903936] Primary DNS retrieved: 93.153.117.49
[1541095858.903978] Secondary DNS retrieved: 93.153.117.17
[1541095858.904039] finished IP settings retrieval for PDP context #5...
[1541095858.904144] (wwan0): port now connected
[1541095858.904200] Connected bearer '/org/freedesktop/ModemManager1/Bearer/0'
[1541095858.904851] (ttyACM0) device open count is 3 (open)
[1541095858.905034] Modem /org/freedesktop/ModemManager1/Modem/0: state changed
(connecting -> connected)
[1541095858.908564] Simple connect state (8/8): All done
[1541095858.910318] (ttyACM0) device open count is 2 (close)
The question is: is there a workaround for that? If no, should then the
ublox plugin
be modified somehow? Or, maybe I've missed something in the modem's
configuration..
Thank you in advance for any support.
Best regards,
Maxim Baryshnikov
--
[1] -
https://www.u-blox.com/sites/default/files/AT-CommandsExamples_AppNote_%28UBX-13001820%29.pdf
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