Sierra Wireless MC7455 and no Comms Drivers

[ropeguru]

Running a Serra Wireless MC7455 and it loads the qcserial drivers, but it looks like all the cdc-mcm and qmi_wwan drivers have been removed?

I do not see any /dev/cdc-wdm devices and there is no driver loaded for the usb communications driver.

root@vyos:~# lsusb -t
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 3: Dev 3, If 0, Class=Vendor Specific Class, Driver=qcserial, 480M
|__ Port 3: Dev 3, If 2, Class=Vendor Specific Class, Driver=qcserial, 480M
|__ Port 3: Dev 3, If 3, Class=Vendor Specific Class, Driver=qcserial, 480M
|__ Port 3: Dev 3, If 12, Class=Communications, Driver=, 480M
|__ Port 3: Dev 3, If 13, Class=CDC Data, Driver=, 480M

From a LTE post back in 2017, it looks like the drivers used to be in VyOS.

Also, I’ve got two new devices. That means qmi_wwan driver is loaded correctly:

michal@vyos:~$ ls /dev/cdc

cdc-wdm0 cdc-wdm1

and

Just to confirm I run dmesg:

[ 9.927826] qmi_wwan 1-4.3:1.8: cdc-wdm0: USB WDM device

[ 9.928091] qmi_wwan 1-4.3:1.8 wwan0: register ‘qmi_wwan’ at usb-0000:00:14.0-4.3, WWAN/QMI device, xx:xx:xx:xx:xx:xx
[ 9.928598] qmi_wwan 1-4.3:1.10: cdc-wdm1: USB WDM device
[ 9.928811] qmi_wwan 1-4.3:1.10 wwan1: register ‘qmi_wwan’ at usb-0000:00:14.0-4.3, WWAN/QMI device, xx:xx:xx:xx:xx:xx

VyOS & LTE modem

Thanks for the above. I’m running the latest beta anyway since stable 1.1.7 does not want to install. Just two questions now: When will devs answer? Where can I get any changelogs for betas? Thanks! EDIT: I installed modem today and it’s showing up in the system: Also, I’ve got two new devices. That means qmi_wwan driver is loaded correctly: Just to confirm I run dmesg: Now, how to use the damn thing now? EDIT2: From linux commands I can get to the following: Unfortunatel…

[c-po]

https://docs.vyos.io/en/latest/configuration/interfaces/wirelessmodem.html

[ropeguru]

Yes, I have been through that page with no success so far.

So, in the doc, is states that if no device is put in, it defaults to ttyUSB2, understood. My MC7455 is currently set where the command interface is ttyUSB1 but there is no option for entering ttyUSBx in the config.

These are the ONLY options, so which one corresponds to ttyUSBx as none of them match that format.

set interfaces wirelessmodem wlm0 device
Possible completions:
ttySXX TTY device name, regular serial port
usbNbXpY TTY device name, USB based
ttyS0
ttyS1
ttyS2
ttyS3
usb0b1.3p1.0
usb0b1.3p1.2
usb0b1.3p1.3

[ropeguru]

So have gotten a little further.

For now I have this in its on vrf for testing and looking at “show ip route table 200”, I see:

VRF default table 200:
K 0.0.0.0/0 [255/8192] unreachable (ICMP unreachable), 00:05:23
C>* 10.112.112.112/32 is directly connected, wlm0, 00:01:57

but I cannot ping out to the internet.

Here is the /var/log/messages from the connection when I try a do a ping from that vrf:

Jan 29 18:08:32 vyos pppd[5631]: Starting link
Jan 29 18:08:33 vyos chat[6465]: abort on (NO DIAL TONE)
Jan 29 18:08:33 vyos chat[6465]: abort on (NO ANSWER)
Jan 29 18:08:33 vyos chat[6465]: abort on (NO CARRIER)
Jan 29 18:08:33 vyos chat[6465]: abort on (DELAYED)
Jan 29 18:08:33 vyos chat[6465]: send (AT^M)
Jan 29 18:08:34 vyos chat[6465]: expect (OK)
Jan 29 18:08:34 vyos chat[6465]: AT^M^M
Jan 29 18:08:34 vyos chat[6465]: OK
Jan 29 18:08:34 vyos chat[6465]: – got it
Jan 29 18:08:34 vyos chat[6465]: send (ATZ^M)
Jan 29 18:08:34 vyos chat[6465]: expect (OK)
Jan 29 18:08:34 vyos chat[6465]: ^M
Jan 29 18:08:34 vyos chat[6465]: ATZ^M^M
Jan 29 18:08:34 vyos chat[6465]: OK
Jan 29 18:08:34 vyos chat[6465]: – got it
Jan 29 18:08:34 vyos chat[6465]: send (AT+CGDCONT=1,“IP”,“reseller”^M)
Jan 29 18:08:34 vyos chat[6465]: expect (OK)
Jan 29 18:08:34 vyos chat[6465]: ^M
Jan 29 18:08:34 vyos chat[6465]: AT+CGDCONT=1,“IP”,“reseller”^M^M
Jan 29 18:08:34 vyos chat[6465]: OK
Jan 29 18:08:34 vyos chat[6465]: – got it
Jan 29 18:08:34 vyos chat[6465]: send (ATD99#^M)
Jan 29 18:08:34 vyos chat[6465]: expect (CONNECT)
Jan 29 18:08:34 vyos chat[6465]: ^M
Jan 29 18:08:34 vyos chat[6465]: ATD99#^M^M
Jan 29 18:08:34 vyos chat[6465]: CONNECT
Jan 29 18:08:34 vyos chat[6465]: – got it
Jan 29 18:08:34 vyos chat[6465]: send (^M)
Jan 29 18:08:34 vyos pppd[5631]: Serial connection established.
Jan 29 18:08:34 vyos pppd[5631]: Connect: wlm0 <–> /dev/serial/by-bus/usb0b1.3p1.3
Jan 29 18:08:35 vyos pppd[5631]: PAP authentication succeeded
Jan 29 18:09:05 vyos pppd[5631]: IPCP: timeout sending Config-Requests
Jan 29 18:09:11 vyos pppd[5631]: Connection terminated.

The above just keeps repeating…

[c-po]

Today VyOS 1.3 and 1.4 branches changed to use QMI interface.

Check out the documentation at: WWAN - Wireless Wide-Area-Network — VyOS 1.3.x (equuleus) documentation

[paulboot]

Very cool and using 4G LTE cards nearly works but I (we) are having some issues with DHCP see Wwan not getting an IP

Kind regards,
Paul.

[paulboot]

Hi @c-po (Christian) I saw that @cnicules (Ciprian) is probably the maintainer of all the 4G magic qmi interfacing. Are there fixes/updates in the latest 1.4 daily build? I have issues getting the WAN IP address from the 4G ISP provider.

Thanks, Paul.

[cnicules]

Hi,
i’m not affiliated with vyos nor a maintainer. Would love to still have the time to code, but …
Cheers,
C