Hello!
I'm unable to establish an Internet connection (dual-stack IP) without additional actions.
To obtain IPv6 address I need enable IPv6 manually by the following command:
$ sudo sysctl -w net.ipv6.conf.wwp0s20f0u1i1.disable_ipv6=0
Furthermore, in case of reconnection I need reset the modem, otherwise I can not obtain IPv6 address even manually. For this I use the following command:
$ mmcli -m 0 -r
The modem was successfully tested with Windows 10 and worked correctly including reconnection.
First connection.
1. sudo systemctl stop NetworkManager ModemManager
2. sudo LC_ALL=C /usr/sbin/ModemManager --debug 2>&1 | tee ModemManager.log
3. sudo LC_ALL=C NM_PPP_DEBUG=1 /usr/sbin/NetworkManager --no-daemon --debug --log-level=DEBUG 2>&1 | tee NetworkManager.log
4. LC_ALL=C nmcli connection show MTS 2>&1 | tee connection.log
5. nmcli connection up MTS
6. LC_ALL=C nmcli connection show MTS 2>&1 | tee connected.ipv4.log
7. sudo sysctl -w net.ipv6.conf.wwp0s20f0u1i1.disable_ipv6=0
8. LC_ALL=C nmcli connection show MTS 2>&1 | tee connected.ipv4v6.log
9. nmcli connection down MTS
10. sudo pkill NetworkManager
11. sudo pkill ModemManager
Reconnection.
1. sudo LC_ALL=C /usr/sbin/ModemManager --debug 2>&1 | tee ModemManager.reconnection.log
2. sudo LC_ALL=C NM_PPP_DEBUG=1 /usr/sbin/NetworkManager --no-daemon --debug --log-level=DEBUG 2>&1 | tee NetworkManager.reconnection.log
3. LC_ALL=C nmcli connection show MTS 2>&1 | tee reconnection.log
4. nmcli connection up MTS
5. LC_ALL=C nmcli connection show MTS 2>&1 | tee reconnected.ipv4.log
6. sudo sysctl -w net.ipv6.conf.wwp0s20f0u1i1.disable_ipv6=0
7. LC_ALL=C nmcli connection show MTS 2>&1 | tee reconnected.ipv4-2.log
8. nmcli connection down MTS
9. mmcli -m 0 -r
10. nmcli connection up MTS
11. sudo sysctl -w net.ipv6.conf.wwp0s20f0u1i1.disable_ipv6=0
12. LC_ALL=C nmcli connection show MTS 2>&1 | tee reconnected.ipv4v6.log
Additional information in attached file.
Thank you for your attention!
Thank you in advance for any advice and help!
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