Linux system cannot use the data connection
Filip Kubicz
filip.kubicz at tier.app
Fri Jul 15 13:29:30 UTC 2022
I love the example :D
However...
# wget
http://193.63.62.31/sites/default/files/publications/civic_renewal_forms.zip
--1970-01-04 01:19:23--
http://193.63.62.31/sites/default/files/publications/civic_renewal_forms.zip
Connecting to 193.63.62.31:80...
failed: Connection timed out.
Retrying.
--1970-01-04 01:21:36-- (try: 2)
http://193.63.62.31/sites/default/files/publications/civic_renewal_forms.zip
Connecting to 193.63.62.31:80... failed: Connection timed out.
Retrying.
--1970-01-04 01:23:50-- (try: 3)
http://193.63.62.31/sites/default/files/publications/civic_renewal_forms.zip
Connecting to 193.63.62.31:80... failed: Connection timed out.
Retrying.
ModemManager still reports
| state: connected
| power state: on
| access tech: lte
| signal quality: 100% (cached)
Bearer statistics:
Statistics | duration: 77790
| bytes tx: 3300828
| attempts: 1
| total-duration: 77790
| total-bytes tx: 3300828
I got the information from operator that:
Super SIM and the network allow only one active application bearer at a
time so the second bearer will be automatically canceled and ModemManager
may get confused.
Are the 2 bearers expected? I think since some version between 1.12 and
1.14 ModemManager shows initial bearer and actual bearer. Correct?
So what could be the real problem in this case? (all logs attached to the
first message)
Kind regards,
Filip
On Fri, Jul 15, 2022 at 3:08 PM Amol Lad <Amol.Lad at 4rf.com> wrote:
> Please try below (skip dns resolution)
>
>
>
> wget
> http://193.63.62.31/sites/default/files/publications/civic_renewal_forms.zip
>
>
>
> *From:* Filip Kubicz <filip.kubicz at tier.app>
> *Sent:* Friday, 15 July 2022 6:29 PM
> *To:* Amol Lad <Amol.Lad at 4rf.com>
> *Cc:* modemmanager-devel at lists.freedesktop.org; Kamil Sroka <
> kamil.sroka at tier.app>
> *Subject:* Re: Linux system cannot use the data connection
>
>
>
> Hi Amol,
>
> # wget http://speedtest.ftp.otenet.gr/files/test10Mb.db
> --1970-01-04 01:06:40-- http://speedtest.ftp.otenet.gr/files/test10Mb.db
> Resolving speedtest.ftp.otenet.gr... failed: Temporary failure in name
> resolution.
> wget: unable to resolve host address 'speedtest.ftp.otenet.gr'
>
>
> Filip
>
>
>
>
>
> On Fri, Jul 15, 2022 at 2:52 PM Amol Lad <Amol.Lad at 4rf.com> wrote:
>
> Please also try downloading a test file as below and see the result. Does
> it download any file at all?
>
>
>
> wget http://speedtest.ftp.otenet.gr/files/test10Mb.db
>
>
>
>
>
>
>
> *From:* Filip Kubicz <filip.kubicz at tier.app>
> *Sent:* Friday, 15 July 2022 5:28 PM
> *To:* Amol Lad <Amol.Lad at 4rf.com>
> *Cc:* modemmanager-devel at lists.freedesktop.org; Kamil Sroka <
> kamil.sroka at tier.app>
> *Subject:* Re: Linux system cannot use the data connection
>
>
>
> Hi Amol, thanks for the answer. I checked that the devices are not hitting
> the SIM data limit.
> Moreover, as I mentioned there is some small RX/TX occurring for the
> device from the operator point of view, but the "ping 8.8.8.8 -I wwan0"
> does not work.
>
>
> Filip
>
>
>
>
>
> On Fri, Jul 15, 2022 at 1:28 PM Amol Lad <Amol.Lad at 4rf.com> wrote:
>
> I generally run into similar situation when my SIM card runs out of money.
> Do you want to try topping-up SIM card and see if ping is successful?
>
>
>
> Amol
>
>
>
> *From:* ModemManager-devel <
> modemmanager-devel-bounces at lists.freedesktop.org> *On Behalf Of *Filip
> Kubicz
> *Sent:* Friday, 15 July 2022 4:14 PM
> *To:* modemmanager-devel at lists.freedesktop.org
> *Cc:* Kamil Sroka <kamil.sroka at tier.app>
> *Subject:* Linux system cannot use the data connection
>
>
>
> Hi!
>
> I'm using ModemManager 1.18.6 with Quectel EG21-G modem and Twilio
> SuperSIM.
>
>
> This setup works ok on multiple devices.
> However, on a few devices, I see following situation:
>
> · Modem registered to operator network (e.g. Vodafone UK)
>
> · Modem reports connected state
>
> · wwan0 interface has IPv4 address
>
> · Network provider sees no issues
>
> · in Network provider console you can see the device exchanges a few
> hundred kB of data every hour
>
> · but ping doesn’t work
>
> · sending data fails
>
> This looks strange, as if ModemManager was not aware of the data session
> that is setup, or Linux system not being able to use it.
>
> The simplified flow of using the modem:
> - enable modem
> - wait until it auto-registers
> - create a bearer and connect
> - when bearer obtains IP address, configure the network interface
>
> I attached relevant mmcli information from the device (modem, bearer) and
> debug level logs from 2 situations:
> - device stable in connected state (but ping fails)
> - modem reset - sequence of enable, register, connect -> goes into the
> same state where ping does not work.
> I also attached the commands that are used for setting up the network
> interface when a new IP address is obtained.
>
> What should I check, or do you know how to avoid this situation?
>
>
> Kind regards,
> Filip
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