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MAC address of PCIe NIC card change on reboot

Featured Replies

Hello

 

I have installed Unraid on an old PC with a i3 6100, an H110 motherboard, 3 HDD and 1 SSD it works fine, I've also added a network card in the x16 slot to have a 2.5gbit network link

 

The issue I have is that the mac address of this card (eth0) change every time the server is rebooted

 

Is it normal?

How can I keep it lock to a specific value?

The gigabit chispet of the MB is disable in the bios

I use a lot the wake up on lan feature since it's not a heavily used nas, it's in sleep most of the time

and if I have to reboot then I need to update the mac address in all of my script and app that are use to wake up the server

Solved by BiLKiNiS

  • Community Expert
12 minutes ago, BiLKiNiS said:

Is it normal?

 

I wouldn't think so.  What is the make/model of the 2.5GBe card?

  • Author

it's a generic brand from amazon (Inatek) that use a Realtek RTL8125 chipset

 

Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller (rev 05)

Edited by BiLKiNiS

  • Community Expert

Please post a couple of the diagnostics showing the issue.

  • Author

Here are the diagnostics but to show the issue I might need to reboot the server witch possible at the moment but I think it will show the same thing except in the ethtool log were the mac address will have change

 

Looking for a generic fix for this I found some tips that recommand to add a row to the boot/config/network.cfg file:

HWADDR="00:00:00:00:00:00" (with the mac address you want or

MACADDR="00:00:00:00:00:00"

 

I might try this an reboot the server when possible to see if it corrects my issue

 

Edited by BiLKiNiS

  • 2 weeks later...
  • Author
  • Solution

I've since rebooted and the MAC address did not change so the solution to my problem was to add a new line in the network.cfg file with HWADDR="00:00:00:00:00:00"

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