I have a Raspberry Pi 4 with a SixFab LTE HAT, with the EG25-G Cellular modem with a T-Mobile SIM. Originally I had a (very expensive) Sixfab Core SIM in it and decided to move to a prepaid T-Mobile data plan.
With regards to networking, I notice on Sixfab Core and T-Mobile SIMs, interface enp1s0u1u3i4 has a private IP address on the 192.168.255.x/24 network and, with Sixfab, had the highest metric for default route out of the box. When I initiated a ping -I enp1s0u1u3i4 -c 5 google.com the traffic would flow through that interface out of cellular.
When I switched to the T-Mobile SIM the priority went to eth0, enp1s0u1u3i4 and then ppp0 (which has the public IP address from T-Mobile). When I run a ping -I enp1s0u1u3i4 -c google.com it fails. When I run a ping -I ppp0 -c google.com it works. NOTE: I did re-image BalenaOS and put a fresh cellular config in the system-connections folder.
Here is my current default route table:
root@e7d5af5:~# ip route
default via 192.168.7.1 dev eth0 metric 100
default via 192.168.225.1 dev enp1s0u1u3i4 metric 20101
default dev ppp0 scope link metric 20700
Here is my network configuration for cellular:
[connection]
id=T-Mobile
type=gsm
autoconnect=true
[gsm]
apn=fast.t-mobile.com
[serial]
baud=115200
[ipv4]
method=auto
[ipv6]
addr-gen-mode=stable-privacy
method=auto
Here is NetworkManager showing the connection as active (both are dark green and imply good connection):
root@e7d5af5:~# nmcli c
NAME UUID TYPE DEVICE
Wired connection 2 4e88fed9-82fd-3e5f-90a6-44bfb1db91bb ethernet eth0
T-Mobile a937294d-10a3-3ec5-b0e7-a588eddce766 gsm ttyUSB2
Modem Manager:
root@e7d5af5:~# mmcli -m 0
--------------------------------
General | path: /org/freedesktop/ModemManager1/Modem/0
| device id: <redacted>
--------------------------------
Hardware | manufacturer: Quectel
| model: EG25
| firmware revision: EG25GGBR07A08M2G
| supported: gsm-umts, lte
| current: gsm-umts, lte
| equipment id: <redacted>
--------------------------------
System | device: /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.3
| drivers: option, cdc_ether
| plugin: quectel
| primary port: ttyUSB2
| ports: enp1s0u1u3i4 (net), ttyUSB0 (qcdm), ttyUSB1 (gps),
| ttyUSB2 (at), ttyUSB3 (at)
--------------------------------
Numbers | own: <redacted>
--------------------------------
Status | unlock retries: sim-pin (3), sim-puk (10), sim-pin2 (10), sim-puk2 (10)
| state: connected
| power state: on
| access tech: lte
| signal quality: 40% (recent)
--------------------------------
Modes | supported: allowed: 2g, 3g, 4g; preferred: none
| current: allowed: 2g, 3g, 4g; preferred: none
--------------------------------
IP | supported: ipv4, ipv6, ipv4v6
--------------------------------
3GPP | imei: <redacted>
| operator id: <redacted>
| operator name: T-Mobile
| registration: home
--------------------------------
3GPP EPS | ue mode of operation: csps-1
--------------------------------
SIM | primary sim path: /org/freedesktop/ModemManager1/SIM/0
--------------------------------
Bearer | paths: /org/freedesktop/ModemManager1/Bearer/0
root@e7d5af5:~# journalctl -u ModemManager
-- Journal begins at Sat 2022-07-09 21:02:04 UTC, ends at Sat 2022-07-09 21:15:00 UTC. --
Jul 09 21:02:07 localhost ModemManager[1476]: ModemManager (version 1.18.4) starting in system bus...
Jul 09 21:02:19 e7d5af5 ModemManager[1476]: [device /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00>
Jul 09 21:02:19 e7d5af5 ModemManager[1476]: [base-manager] modem for device '/sys/devices/platform/scb/fd500000.pcie/pci0000:0>
Jul 09 21:02:30 e7d5af5 ModemManager[1476]: [modem0/sim0] couldn't load operator name: Failed to parse CRSM query result '+CRS>
Jul 09 21:02:30 e7d5af5 ModemManager[1476]: [modem0/sim0] couldn't load list of preferred networks: Operation not allowed
Jul 09 21:02:59 e7d5af5 ModemManager[1476]: [modem0/ttyUSB0/qcdm] close blocked by driver for more than 7 seconds!
Jul 09 21:03:00 e7d5af5 ModemManager[1476]: [modem0] state changed (unknown -> disabled)
Jul 09 21:03:00 e7d5af5 ModemManager[1476]: [modem0] state changed (disabled -> enabling)
Jul 09 21:03:05 e7d5af5 ModemManager[1476]: [modem0] simple connect started...
Jul 09 21:03:05 e7d5af5 ModemManager[1476]: [modem0] simple connect state (4/8): wait to get fully enabled
Jul 09 21:03:05 e7d5af5 ModemManager[1476]: [modem0] power state updated: on
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] 3GPP registration state changed (unknown -> idle)
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] state changed (enabling -> enabled)
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] simple connect state (5/8): register
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] 3GPP registration state changed (idle -> registering)
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] 3GPP registration state changed (registering -> home)
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] state changed (enabled -> registered)
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] simple connect state (6/8): bearer
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] simple connect state (7/8): connect
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] state changed (registered -> connecting)
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] state changed (connecting -> connected)
Jul 09 21:03:06 e7d5af5 ModemManager[1476]: [modem0] simple connect state (8/8): all done
root@e7d5af5:~#
root@e7d5af5:~# journalctl -u NetworkManager
-- Journal begins at Sat 2022-07-09 21:02:04 UTC, ends at Sat 2022-07-09 21:16:17 UTC. --
Jul 09 21:02:08 localhost NetworkManager[1554]: <info> [1657400528.0814] NetworkManager (version 1.32.12) is starting... (for>
Jul 09 21:02:08 localhost NetworkManager[1554]: <info> [1657400528.0818] Read config: /etc/NetworkManager/NetworkManager.conf>
Jul 09 21:02:08 localhost NetworkManager[1554]: <info> [1657400528.1039] bus-manager: acquired D-Bus service "org.freedesktop>
Jul 09 21:02:08 localhost NetworkManager[1554]: <info> [1657400528.1884] manager[0x556e55f090]: monitoring kernel firmware di>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.2506] hostname: hostname: using hostnamed
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.2510] hostname: hostname changed from (none) to "e7d5af5"
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.2554] dns-mgr[0x556e53f250]: init: dns=default,systemd-resol>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.2604] rfkill0: found Wi-Fi radio killswitch (at /sys/devices>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.2628] manager[0x556e55f090]: rfkill: Wi-Fi hardware radio se>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.2634] manager[0x556e55f090]: rfkill: WWAN hardware radio set>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3168] Loaded device plugin: NMBluezManager (/usr/lib/Network>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3208] Loaded device plugin: NMAtmManager (/usr/lib/NetworkMa>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3279] Loaded device plugin: NMWifiFactory (/usr/lib/NetworkM>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3317] Loaded device plugin: NMWwanFactory (/usr/lib/NetworkM>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3327] manager: rfkill: Wi-Fi enabled by radio killswitch; en>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3336] manager: rfkill: WWAN enabled by radio killswitch; ena>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3339] manager: Networking is enabled by state file
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3346] dhcp-init: Using DHCP client 'internal'
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3392] settings: Loaded settings plugin: keyfile (internal)
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3577] device (lo): carrier: link connected
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3587] manager: (lo): new Generic device (/org/freedesktop/Ne>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3764] manager: (enp1s0u1u3i4): new Ethernet device (/org/fre>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3906] settings: (enp1s0u1u3i4): created default wired connec>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.3952] device (enp1s0u1u3i4): state change: unmanaged -> unav>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.4006] device (enp1s0u1u3i4): carrier: link connected
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.4092] manager: (eth0): new Ethernet device (/org/freedesktop>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.4271] settings: (eth0): created default wired connection 'Wi>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.4292] device (eth0): state change: unmanaged -> unavailable >
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.4557] manager: (resin-dns): new Bridge device (/org/freedesk>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.4676] device (wlan0): driver supports Access Point (AP) mode
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.4714] manager: (wlan0): new 802.11 Wi-Fi device (/org/freede>
Jul 09 21:02:09 e7d5af5 NetworkManager[1554]: <info> [1657400529.4948] device (wlan0): state change: unmanaged -> unavailable>
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.0469] device (wlan0): set-hw-addr: set MAC address to AA:E2:>
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.1092] device (enp1s0u1u3i4): state change: unavailable -> di>
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.1147] policy: auto-activating connection 'Wired connection 1>
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.1263] device (enp1s0u1u3i4): Activation: starting connection>
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.1270] device (enp1s0u1u3i4): state change: disconnected -> p>
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.1339] manager: NetworkManager state is now CONNECTING
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.1355] device (enp1s0u1u3i4): state change: prepare -> config>
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.1398] device (enp1s0u1u3i4): state change: config -> ip-conf>
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.1480] dhcp4 (enp1s0u1u3i4): activation: beginning transactio>
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.2906] device (wlan0): supplicant interface state: internal-s>
Jul 09 21:02:10 e7d5af5 NetworkManager[1554]: <info> [1657400530.2911] device (wlan0): state change: unavailable -> disconnec>
Jul 09 21:02:11 e7d5af5 NetworkManager[1554]: <info> [1657400531.6554] manager: (balena0): new Bridge device (/org/freedeskto>
Jul 09 21:02:11 e7d5af5 NetworkManager[1554]: <info> [1657400531.8768] manager: (supervisor0): new Bridge device (/org/freede>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.0931] device (supervisor0): state change: unmanaged -> unava>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <warn> [1657400532.1111] device (supervisor0): failed to read bridge setting 'v>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <warn> [1657400532.1115] device (supervisor0): failed to read bridge setting 'v>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.1234] device (supervisor0): state change: unavailable -> dis>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.1293] device (supervisor0): Activation: starting connection >
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.1339] manager: (br-98d2b6378cb4): new Bridge device (/org/fr>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.1488] device (supervisor0): state change: disconnected -> pr>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.1515] device (supervisor0): state change: prepare -> config >
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.1558] device (supervisor0): state change: config -> ip-confi>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.1586] device (supervisor0): state change: ip-config -> ip-ch>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.1726] device (supervisor0): state change: ip-check -> second>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.1837] device (supervisor0): state change: secondaries -> act>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.1877] device (supervisor0): Activation: successful, device a>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.9741] manager: (vethfb615ad): new Veth device (/org/freedesk>
Jul 09 21:02:12 e7d5af5 NetworkManager[1554]: <info> [1657400532.9860] manager: (veth7eb0370): new Veth device (/org/freedesk>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.1950] dhcp4 (enp1s0u1u3i4): state changed unknown -> bound, >
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.2031] device (enp1s0u1u3i4): state change: ip-config -> ip-c>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.2227] device (enp1s0u1u3i4): state change: ip-check -> secon>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.2338] device (enp1s0u1u3i4): state change: secondaries -> ac>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.2393] manager: NetworkManager state is now CONNECTED_LOCAL
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.2507] manager: NetworkManager state is now CONNECTED_SITE
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.2517] policy: set 'Wired connection 1' (enp1s0u1u3i4) as def>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.2533] dns-mgr: Writing DNS information to /sbin/resolvconf
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.3491] device (enp1s0u1u3i4): Activation: successful, device >
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.5335] device (eth0): carrier: link connected
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.5378] device (eth0): state change: unavailable -> disconnect>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.5465] policy: auto-activating connection 'Wired connection 2>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.5645] device (eth0): Activation: starting connection 'Wired >
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.5657] device (eth0): state change: disconnected -> prepare (>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.5679] manager: NetworkManager state is now CONNECTING
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.5692] device (eth0): state change: prepare -> config (reason>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.5717] device (eth0): state change: config -> ip-config (reas>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.5734] dhcp4 (eth0): activation: beginning transaction (timeo>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.6015] dhcp4 (eth0): state changed unknown -> bound, address=>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.6066] device (eth0): state change: ip-config -> ip-check (re>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.6234] device (eth0): state change: ip-check -> secondaries (>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.6242] device (eth0): state change: secondaries -> activated >
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.6270] manager: NetworkManager state is now CONNECTED_SITE
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.6287] dns-mgr: Writing DNS information to /sbin/resolvconf
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.6926] device (eth0): Activation: successful, device activate>
Jul 09 21:02:13 e7d5af5 NetworkManager[1554]: <info> [1657400533.6952] manager: startup complete
Jul 09 21:02:14 e7d5af5 NetworkManager[1554]: <info> [1657400534.2825] modem-manager: ModemManager available
Jul 09 21:02:15 e7d5af5 NetworkManager[1554]: <info> [1657400535.2176] policy: set 'Wired connection 2' (eth0) as default for>
Jul 09 21:02:15 e7d5af5 NetworkManager[1554]: <info> [1657400535.4807] dhcp6 (enp1s0u1u3i4): activation: beginning transactio>
Jul 09 21:02:15 e7d5af5 NetworkManager[1554]: <info> [1657400535.4849] policy: set 'Wired connection 1' (enp1s0u1u3i4) as def>
Jul 09 21:02:15 e7d5af5 NetworkManager[1554]: <info> [1657400535.4864] dns-mgr: Writing DNS information to /sbin/resolvconf
Jul 09 21:02:15 e7d5af5 NetworkManager[1554]: <info> [1657400535.5541] dhcp6 (enp1s0u1u3i4): state changed unknown -> bound
Jul 09 21:02:15 e7d5af5 NetworkManager[1554]: <info> [1657400535.7832] device (veth7eb0370): carrier: link connected
Jul 09 21:02:15 e7d5af5 NetworkManager[1554]: <info> [1657400535.7865] device (br-98d2b6378cb4): carrier: link connected
Jul 09 21:02:28 e7d5af5 NetworkManager[1554]: <info> [1657400548.8242] policy: set 'Wired connection 2' (eth0) as default for>
Jul 09 21:02:28 e7d5af5 NetworkManager[1554]: <info> [1657400548.9026] manager: NetworkManager state is now CONNECTED_GLOBAL
Jul 09 21:02:31 e7d5af5 NetworkManager[1554]: <info> [1657400551.1206] manager: (resin-vpn): new Tun device (/org/freedesktop>
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.0493] device (enp1s0u1u3i4): state change: activated -> unma>
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.0858] dhcp4 (enp1s0u1u3i4): canceled DHCP transaction
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.0860] dhcp4 (enp1s0u1u3i4): state changed bound -> terminated
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.0875] dhcp6 (enp1s0u1u3i4): canceled DHCP transaction
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.0877] dhcp6 (enp1s0u1u3i4): state changed bound -> terminated
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.0917] dns-mgr: Writing DNS information to /sbin/resolvconf
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.1376] dns-mgr: Writing DNS information to /sbin/resolvconf
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.1814] policy: set 'Wired connection 2' (eth0) as default for>
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.1874] modem["ttyUSB2"]: modem state changed, 'disabled' --> >
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.1885] manager: (ttyUSB2): new Broadband device (/org/freedes>
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.1893] device (ttyUSB2): state change: unmanaged -> unavailab>
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.1903] device (ttyUSB2): modem state 'enabling'
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.1927] device (ttyUSB2): state change: unavailable -> disconn>
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.1940] policy: auto-activating connection 'T-Mobile' (>
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.1957] device (ttyUSB2): Activation: starting connection 'T-M>
Jul 09 21:03:00 e7d5af5 NetworkManager[1554]: <info> [1657400580.1962] device (ttyUSB2): state change: disconnected -> prepar>
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.5335] modem["ttyUSB2"]: modem state changed, 'enabling' --> >
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.6554] modem["ttyUSB2"]: modem state changed, 'enabled' --> '>
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.6894] modem["ttyUSB2"]: modem state changed, 'registered' -->
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.7787] modem["ttyUSB2"]: modem state changed, 'connecting' -->
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.7872] device (ttyUSB2): state change: prepare -> config (rea>
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.7885] device (ttyUSB2): state change: config -> ip-config (r>
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.7893] modem["ttyUSB2"]: using modem-specified IP timeout: 20>
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.7931] loaded PPP plugin /usr/lib/NetworkManager/1.32.12/libn>
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.7945] ppp-manager: starting PPP connection
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.8072] ppp-manager: pppd started with pid 2563
Jul 09 21:03:06 e7d5af5 pppd[2563]: Plugin /usr/lib/pppd/2.4.7/nm-pppd-plugin.so loaded.
Jul 09 21:03:06 e7d5af5 NetworkManager[2563]: Plugin /usr/lib/pppd/2.4.7/nm-pppd-plugin.so loaded.
Jul 09 21:03:06 e7d5af5 pppd[2563]: nm-ppp-plugin: initializing
Jul 09 21:03:06 e7d5af5 pppd[2563]: pppd 2.4.9 started by root, uid 0
Jul 09 21:03:06 e7d5af5 pppd[2563]: nm-ppp-plugin: status 3 / phase 'serial connection'
Jul 09 21:03:06 e7d5af5 pppd[2563]: Using interface ppp0
Jul 09 21:03:06 e7d5af5 NetworkManager[2563]: Using interface ppp0
Jul 09 21:03:06 e7d5af5 pppd[2563]: Connect: ppp0 <--> /dev/ttyUSB2
Jul 09 21:03:06 e7d5af5 NetworkManager[2563]: Connect: ppp0 <--> /dev/ttyUSB2
Jul 09 21:03:06 e7d5af5 pppd[2563]: nm-ppp-plugin: status 5 / phase 'establish'
Jul 09 21:03:06 e7d5af5 NetworkManager[1554]: <info> [1657400586.8761] manager: (ppp0): new Ppp device (/org/freedesktop/Netw>
Jul 09 21:03:07 e7d5af5 pppd[2563]: nm-ppp-plugin: status 6 / phase 'authenticate'
Jul 09 21:03:07 e7d5af5 pppd[2563]: nm-ppp-plugin: passwd-hook, requesting credentials...
Jul 09 21:03:07 e7d5af5 pppd[2563]: nm-ppp-plugin: got credentials from NetworkManager
Jul 09 21:03:07 e7d5af5 pppd[2563]: CHAP authentication succeeded
Jul 09 21:03:07 e7d5af5 pppd[2563]: CHAP authentication succeeded
Jul 09 21:03:07 e7d5af5 pppd[2563]: nm-ppp-plugin: status 8 / phase 'network'
Jul 09 21:03:07 e7d5af5 NetworkManager[2563]: CHAP authentication succeeded
Jul 09 21:03:07 e7d5af5 NetworkManager[2563]: CHAP authentication succeeded
Jul 09 21:03:07 e7d5af5 pppd[2563]: Could not determine remote IP address: defaulting to <redacted>
Jul 09 21:03:07 e7d5af5 NetworkManager[2563]: Could not determine remote IP address: defaulting to <redacted>
Jul 09 21:03:07 e7d5af5 pppd[2563]: Failed to create /etc/ppp/resolv.conf: Read-only file system
Jul 09 21:03:07 e7d5af5 NetworkManager[2563]: Failed to create /etc/ppp/resolv.conf: Read-only file system
Jul 09 21:03:07 e7d5af5 pppd[2563]: local IP address <redacted>
Jul 09 21:03:07 e7d5af5 NetworkManager[2563]: local IP address <redacted>
Jul 09 21:03:07 e7d5af5 NetworkManager[2563]: remote IP address <redacted>
Jul 09 21:03:07 e7d5af5 NetworkManager[2563]: primary DNS address <redacted>
Jul 09 21:03:07 e7d5af5 NetworkManager[2563]: secondary DNS address <redacted>
Jul 09 21:03:07 e7d5af5 pppd[2563]: nm-ppp-plugin: status 9 / phase 'running'
Jul 09 21:03:07 e7d5af5 pppd[2563]: remote IP address <redacted>
Jul 09 21:03:07 e7d5af5 pppd[2563]: primary DNS address <redacted>
Jul 09 21:03:07 e7d5af5 pppd[2563]: secondary DNS address <redacted>
Jul 09 21:03:07 e7d5af5 NetworkManager[1554]: <info> [1657400587.9599] device (ppp0): state change: unmanaged -> unavailable >
Jul 09 21:03:07 e7d5af5 pppd[2563]: nm-ppp-plugin: ip-up event
Jul 09 21:03:07 e7d5af5 pppd[2563]: nm-ppp-plugin: sending IPv4 config to NetworkManager...
Jul 09 21:03:07 e7d5af5 NetworkManager[1554]: <info> [1657400587.9747] device (ppp0): state change: unavailable -> disconnect>
Jul 09 21:03:07 e7d5af5 NetworkManager[1554]: <info> [1657400587.9779] ppp-manager: (IPv4 Config Get) reply received.
Jul 09 21:03:07 e7d5af5 NetworkManager[1554]: <info> [1657400587.9855] device (ttyUSB2): state change: ip-config -> ip-check >
Jul 09 21:03:07 e7d5af5 NetworkManager[1554]: <info> [1657400587.9951] device (ttyUSB2): state change: ip-check -> secondarie>
Jul 09 21:03:07 e7d5af5 NetworkManager[1554]: <info> [1657400587.9970] device (ttyUSB2): state change: secondaries -> activat>
Jul 09 21:03:08 e7d5af5 NetworkManager[1554]: <info> [1657400588.0033] dns-mgr: Writing DNS information to /sbin/resolvconf
Jul 09 21:03:08 e7d5af5 NetworkManager[1554]: <info> [1657400588.0509] device (ttyUSB2): Activation: successful, device activ>
Jul 09 21:03:37 e7d5af5 pppd[2563]: IPV6CP: timeout sending Config-Requests
Jul 09 21:03:37 e7d5af5 NetworkManager[2563]: IPV6CP: timeout sending Config-Requests
Jul 09 21:09:22 e7d5af5 NetworkManager[1554]: <info> [1657400962.4522] device (wlan0): set-hw-addr: set MAC address to BE:E3:>
Jul 09 21:09:22 e7d5af5 NetworkManager[1554]: <info> [1657400962.4769] device (wlan0): supplicant interface state: disconnect>
Jul 09 21:09:22 e7d5af5 NetworkManager[1554]: <info> [1657400962.4773] device (wlan0): supplicant interface state: interface_>
Jul 09 21:16:17 e7d5af5 NetworkManager[1554]: <info> [1657401377.4604] device (wlan0): set-hw-addr: set MAC address to 7A:3F:>
Jul 09 21:16:17 e7d5af5 NetworkManager[1554]: <info> [1657401377.4852] device (wlan0): supplicant interface state: inactive ->
Jul 09 21:16:17 e7d5af5 NetworkManager[1554]: <info> [1657401377.5137] device (wlan0): supplicant interface state: interface_>
root@e7d5af5:~#
My questions are:
-
What is the privateI figured this out; this is how the modem works in ECM mode.192.168.255.0/24network on balenaOS for? - I could use some guidance on next steps to resolve my issue.
Update 1
The above issue is with the modem configured in ECM mode. I noticed that I got an IPv4 address via PPP with T-Mobile. When I switched to QMI mode, T-Mobile will only issue an IPv6 address.
So, with ECM mode, I get an IPv4 address from the carrier via PPP. I can only imagine that this will be slow but, from what I understand, enp1s0u1u3i4 appears to be an inside interface and can be used to access the web interface of the Qualcom modem configuration. With the Sixfab Core SIM (using AT&T Twilio) this network would route through cellular and was the default connection. How can I get to this state in ECM with PPP with T-Mobile?
If I switch to QMI mode, I only get an IPv6 address from the carrier. Does Balena support an IPv6 only connection? Is there a way to NAT the IPv4 traffic out of that IPv6 only connection and make that the primary connection vs eth0?