Modem connected but no internet

[Lucas Pelegrino]

I tried running `sudo dhclient wwan0`, it seems it got one of the modems to
work, but I have two modems and `wwan1` remains with the same problem and
`sudo dhclient wwan1` didn't seem to work on it.

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state
DOWN group default qlen 1000
link/ether b8:27:eb:87:22:8e brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state
UP group default qlen 1000
link/ether b8:27:eb:d2:77:db brd ff:ff:ff:ff:ff:ff
inet 192.168.0.16/24 brd 192.168.0.255 scope global dynamic noprefixroute
wlan0
valid_lft 85555sec preferred_lft 85555sec
inet6 2804:14c:7582:46bf::1007/128 scope global dynamic noprefixroute
valid_lft 85557sec preferred_lft 85557sec
inet6 2804:14c:7582:46bf:cfbe:7945:f701:da92/64 scope global dynamic
noprefixroute
valid_lft 86372sec preferred_lft 71972sec
inet6 fe80::5139:cd08:a2a9:9a4e/64 scope link noprefixroute
valid_lft forever preferred_lft forever
4: wwan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state
UNKNOWN group default qlen 1000
link/ether 0c:5b:8f:27:9a:64 brd ff:ff:ff:ff:ff:ff
inet 100.70.243.89/30 brd 100.70.243.91 scope global noprefixroute wwan0
valid_lft forever preferred_lft forever
6: wwan1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state
UNKNOWN group default qlen 1000
link/ether 0c:5b:8f:27:9a:64 brd ff:ff:ff:ff:ff:ff
inet 100.71.207.216/28 brd 100.71.207.223 scope global dynamic wwan1
valid_lft 518326sec preferred_lft 518326sec



Em sáb., 2 de out. de 2021 às 11:36, Yegor Yefremov <
yegorslists at googlemail.com> escreveu:

> Hi Lucas,
>
> On Sat, Oct 2, 2021 at 4:26 PM Lucas Pelegrino <lucas.wxp at gmail.com>
> wrote:
> >
> > Hello there.
> >
> > I have this behavior in my raspberry PI where a modem shows connected,
> but I still can't connect to the internet:
> > --------------------------------
> > General | path: /org/freedesktop/ModemManager1/Modem/4
> > | device id: ab1573a4186ee4930c3dbe7ee14e2dddcd10b4c2
> > --------------------------------
> > Hardware | manufacturer: huawei
> > | model: E3276
> > | firmware revision: 21.260.05.01.150
> > | supported: gsm-umts
> > | current: gsm-umts
> > | equipment id: 866519011156587
> > --------------------------------
> > System | device:
> /sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2.2
> > | drivers: huawei_cdc_ncm, option
> > | plugin: huawei
> > | primary port: cdc-wdm0
> > | ports: cdc-wdm0 (at), ttyUSB0 (at), ttyUSB1 (at), wwan0 (net)
> > --------------------------------
> > Numbers | own: +xxxx
> > --------------------------------
> > Status | unlock retries: sim-pin (3), sim-puk (10), sim-pin2 (3),
> sim-puk2 (10)
> > | state: connected
> > | power state: on
> > | access tech: umts
> > | signal quality: 41% (recent)
> > --------------------------------
> > Modes | supported: allowed: 2g; preferred: none
> > | allowed: 3g; preferred: none
> > | allowed: 4g; preferred: none
> > | allowed: 2g, 3g, 4g; preferred: none
> > | current: allowed: 2g, 3g, 4g; preferred: none
> > --------------------------------
> > IP | supported: ipv4, ipv6, ipv4v6
> > --------------------------------
> > 3GPP | imei: 866519011156587
> > | operator id: 72416
> > | operator name: Oi
> > | registration: roaming
> > --------------------------------
> > 3GPP EPS | ue mode of operation: csps-2
> > --------------------------------
> > SIM | primary sim path: /org/freedesktop/ModemManager1/SIM/4
> > --------------------------------
> > Bearer | paths: /org/freedesktop/ModemManager1/Bearer/5
> >
> >
> >
> > Weird thing is that on my Ubuntu desktop this modem works! The only
> difference I noticed is that in my Ubuntu field 'access tech' is 'lte',
> while above (on the pi) like you can see it's 'umts'.
> >
> > I figured the problem might be related to the 'access tech' field above,
> so I tried forcing setting mode for '4g' but didn't work:
> >
> > $ sudo mmcli -m 4 --set-allowed-modes='4g' --set-preferred-mode='4g'
> > error: couldn't set current modes:
> 'GDBus.Error:org.freedesktop.ModemManager1.Error.Core.Unsupported: The
> given combination of allowed and preferred modes is not supported'
> >
> >
> > The only difference between my raspberry pi and my desktop machine is
> that the pi is under a more recent version of ModemManager 1.16 vs 1.12
> from my desktop Ubuntu.
> >
> > Any ideas?
>
> Could you share your IP configuration i.e. please post the output of
> the "ip addr" command. Looks like you haven't run dhcpclient or alike
> on your wwan0 interface.
>
> Best regards,
> Yegor
>
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