# Two sixfab Base Hat and 2 interfaces

**URL:** <https://community.sixfab.com/t/two-sixfab-base-hat-and-2-interfaces/1372>\
**Category:** 3G/4G&LTE Base HAT\
**Created:** [May 11, 2021, 2:50pm UTC](https://community.sixfab.com/t/two-sixfab-base-hat-and-2-interfaces/1372 "2021-05-11T14:50:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nfernandez](https://community.sixfab.com/user_avatar/community.sixfab.com/nfernandez/32/706_2.png) [@nfernandez](https://community.sixfab.com/u/nfernandez)\
**Post date:** [May 11, 2021, 2:50pm UTC](https://community.sixfab.com/t/two-sixfab-base-hat-and-2-interfaces/1372/1 "2021-05-11T14:50:34Z")

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Hi,

I have 2 different Base hat with 2 different sims corresponding to 2 different network operator. I would like thta the shield 2 (e.g on the top) has always the interface wwan1 and the above shield has always the interface wwan0. Is it that possible? By this way, the assigning for the operator is much better by the option quectel-CM -s apn1 -i wwan0 quectel-CM -s apn2 -i wwan1.

Thanks

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**Author:** ![saeed](https://community.sixfab.com/user_avatar/community.sixfab.com/saeed/32/694_2.png) [@saeed](https://community.sixfab.com/u/saeed)\
**Post date:** [May 12, 2021, 2:13pm UTC](https://community.sixfab.com/t/two-sixfab-base-hat-and-2-interfaces/1372/2 "2021-05-12T14:13:18Z")

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You may use [udev](https://www.freedesktop.org/software/systemd/man/udev.html) rule of linux to specify this.  
This [article](https://opensource.com/article/18/11/udev) could be helpful.