# ePMP Force 200 and Force 180 invalid MAC address 00:04:56:ff:ff:ff issue

**URL:** https://community.cambiumnetworks.com/t/epmp-force-200-and-force-180-invalid-mac-address-0056ff-ff-issue/61570
**Category:** ePMP
**Created:** [May 7, 2019, 11:50am UTC](https://community.cambiumnetworks.com/t/epmp-force-200-and-force-180-invalid-mac-address-0056ff-ff-issue/61570 "2019-05-07T11:50:57Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Fedor](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/fedor/32/20305_2.png) [@Fedor](https://community.cambiumnetworks.com/u/Fedor)
#### Post date: [May 7, 2019, 11:50am UTC](https://community.cambiumnetworks.com/t/epmp-force-200-and-force-180-invalid-mac-address-0056ff-ff-issue/61570/1 "2019-05-07T11:50:57Z")

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**ePMP Force 200 and Force 180 invalid MAC address 00:04:56:ff:ff:ff issue**

ePMP radios have strarted to support new OUI range recently.

Previously all ePMP radios had OUI range 00:04:56:xx:xx:xx and new range is 58:C1:7A:xx:xx:xx.

If you new Force 200 and Force 180 radios have invalid MAC address dispalyed in GUI or in cnMaestro in format like the following: **00:04:56:ff:ff:ff** ,

**Please upgrade the radio to 3.5.5 FW or newer.**

New OUI range is fully supported starting 3.5.5 FW version.

Thank you.