# GL7x00 linux interface

**URL:** <https://forum.sierrawireless.com/t/gl7x00-linux-interface/17489>\
**Category:** GL Series\
**Created:** [September 5, 2019, 3:18pm UTC](https://forum.sierrawireless.com/t/gl7x00-linux-interface/17489 "2019-09-05T15:18:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![simonFotokite](https://avatars.discourse-cdn.com/v4/letter/s/a698b9/32.png) [@simonFotokite](https://forum.sierrawireless.com/u/simonFotokite)\
**Post date:** [September 5, 2019, 3:18pm UTC](https://forum.sierrawireless.com/t/gl7x00-linux-interface/17489/1 "2019-09-05T15:18:10Z")

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Hello,  
I’m trying to a computer running ubuntu to the internet via a GL7600 (and later a GL7500) connected via microusb.

The GL is recognized in lsusb, it creates interfaces `wwan{0,1,2,3}` in `ip a` and `ModemManager` can interact with it, even managing to conect to the LTE network (with `mmcli -m 1 --simple-connect="apn=gprs.swisscom.ch,user=gprs,password=gprs"`).  
However, I cannot access the internet as:

- the modem doesn’t show up in `NetworkManager`
- the `wwanX` interfaces cannot be brought UP
- the `/dev/cdc-ncm` file is not present.

I’d like to connect to it with some high speed protocol like NCM or MBIM in order to benefit from the LTE bandwidth, not as a serial modem.

Where can one find guidance on GL usage under linux?

Thank you,  
Simon

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**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\
**Post date:** [November 18, 2019, 6:56am UTC](https://forum.sierrawireless.com/t/gl7x00-linux-interface/17489/2 "2019-11-18T06:56:44Z")

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Hi,  
The user guide is here:  
[https://source.sierrawireless.com/resources/airprime/application\_notes\_and\_code\_samples/airprime\_hl75xx\_network\_interface\_configuration\_technical\_note/#sthash.sFzXYqHB.dpbs](https://source.sierrawireless.com/resources/airprime/application_notes_and_code_samples/airprime_hl75xx_network_interface_configuration_technical_note/#sthash.sFzXYqHB.dpbs)  
By default, KUSBCOMP =0, there are 4 NCM interfaces.  
If you want to use MBIM interface, change KUSBCOMP=2

Hope it can help.  
Thanks,