# FX30 LTE-M - MAC Address change at each reboot

**URL:** <https://forum.sierrawireless.com/t/fx30-lte-m-mac-address-change-at-each-reboot/22334>\
**Category:** FX30\
**Created:** [December 9, 2020, 10:49am UTC](https://forum.sierrawireless.com/t/fx30-lte-m-mac-address-change-at-each-reboot/22334 "2020-12-09T10:49:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![g.amaudric](https://avatars.discourse-cdn.com/v4/letter/g/e36b37/32.png) [@g.amaudric](https://forum.sierrawireless.com/u/g.amaudric)\
**Post date:** [December 9, 2020, 10:49am UTC](https://forum.sierrawireless.com/t/fx30-lte-m-mac-address-change-at-each-reboot/22334/1 "2020-12-09T10:49:19Z")

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Hi,  
On the FX30 LTE the MAC address of eth0 change at each reboot (like the FX30 3G). However, it seem that the LTE internal Ethernet driver or hardware chip doesn’t support a fixed mac address set in the /etc/network/interface file (via` hw address`) which is supported by the 3G.  
I get this error:  
`ifconfig: SIOCSIFHWADDR: Device or resource busy`

Is it exist any way to set the MAC Address on the LTE?

Regards,  
Guillaume

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**Author:** ![Donald](https://avatars.discourse-cdn.com/v4/letter/d/ac8455/32.png) [@Donald](https://forum.sierrawireless.com/u/Donald)\
**Post date:** [December 10, 2020, 2:51am UTC](https://forum.sierrawireless.com/t/fx30-lte-m-mac-address-change-at-each-reboot/22334/2 "2020-12-10T02:51:07Z")

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Hi @g.amaudric

To configure the MAC address to a static address use targetToolsSetNet. This will set the MAC to address to the current address:

```
ssh to FX30 LTE-M: 
# ssh root@192.168.2.2
# setNet macfixed
# ifconfig # check that the MAC address and IP address are set
# legato restart # reboots the target device

```

Please help to tick “Solutions” if your question is answered.

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<div class="post-metadata">

**Author:** ![g.amaudric](https://avatars.discourse-cdn.com/v4/letter/g/e36b37/32.png) [@g.amaudric](https://forum.sierrawireless.com/u/g.amaudric)\
**Post date:** [December 11, 2020, 4:54pm UTC](https://forum.sierrawireless.com/t/fx30-lte-m-mac-address-change-at-each-reboot/22334/3 "2020-12-11T16:54:41Z")

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Hi Donald,

Thank you it work like a charm!

Regards,  
Guillaume