Hi, 1.Is the nano module eeprom information in the i2c bus2 0x50? 2.I use i2ctool dump bus2 0x50, then I find the output about eth mac addr is different with it in ifconfig. The following is outputs: sudo i2cdump -f -y 2 0x50 No size specified (using byte-data access) 0 1 2 3 4 5 6 7…

From the outout with “sudo i2cdump -f -y 2 0x50”, eth mac addr is: 04:4b:e4:3a:74 But the device eth mac addr is: 00:e0:4c:68:01:c3 We want to know why they are different and how to make they keep the same.

That is indeed weird. Could you share the boot log (bootloader log) from uart?

Sure, and I change another nano, get the same result. Serial-COM13_1217_15-21-41.log (31.6 KB)

Sorry, #4’s log is for the another nano, not for #1 and #2. The following is mac information for #4’s nano: From the outout with “sudo i2cdump -f -y 2 0x50”, eth mac addr is: 00:04:4b:e4:3f:8d But the device eth mac addr is: 00:e0:4c:68:01:e5

Hi arkinghts, Is it a production module?

Hi WayneWWW, No, it is: Jetson Nano: P3450-0000(development module with SD Card memory)

Hi arknights, Could you share the release you are using? I suspect there are some udev rules override the mac. Please share the result of “sudo udevadm info -q all /sys/class/net/eth0”.

Hi WayneWWW, I used Jetpack 4.2.1 rev.2. Another device used Jetpack 4.2.3 $ sudo udevadm info -q all /sys/class/net/eth0 P: /devices/1003000.pcie/pci0000:00/0000:00:02.0/0000:01:00.0/net/eth0 E: DEVPATH=/devices/1003000.pcie/pci0000:00/0000:00:02.0/0000:01:00.0/net/eth0 E: ID_BUS=pci E: ID_MM_CAN…

I don’t see any udev which is involved with mac address. Is this mac address the same value in each reboot?

yes, no matter each reboot or reflash, mac address has the same value. First nano: From the outout with “sudo i2cdump -f -y 2 0x50”, eth mac addr is: 00:04:4b:e4:3a:74 But the device eth mac addr is: 00:e0:4c:68:01:c3 Second nano: From the outout with “sudo i2cdump -f -y 2 0x50”, eth mac addr i…

The question about mac address in eeprom

Robotics & Edge Computing Jetson Systems Jetson Nano

WayneWWW December 18, 2019, 6:10am 15

Hi arknights,

This old issue comes to my mind. I think it is duplicated with your problem.

https://devtalk.nvidia.com/default/topic/1056705/jetson-nano/jetson-nano-developer-kit-ethernet-firmware-update/

Jetson nano developer kit MAC address issue

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The question about mac address in eeprom

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