How to know the mac adress location of ethernet port in the router?

[learner981]

i want to port openwrt to alcatel hh41v, there is a current hh40v image which i have successfully installed on hh41v but the eth0 (lan2/wan) port is not working
so ithnk the problem may be in the mac adress?
i'm trying to find the mac adress location of eth port

i read that it is stored in the u-boot partition

root@OpenWrt:~# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00040000 00010000 "u-boot"
mtd1: 00010000 00010000 "u-boot-env"
mtd2: 00100000 00010000 "oem"
mtd3: 00ea0000 00010000 "firmware"
mtd4: 00280000 00010000 "kernel"
mtd5: 00c20000 00010000 "rootfs"
mtd6: 00850000 00010000 "rootfs_data"
mtd7: 00010000 00010000 "art"

i try to show the u-boot content and manually search for the mac adress shown in the router interface
root@OpenWrt:~# cat /dev/mtd0 |hexdump

i get a full list of numbers like these:

0000000 1000 00ff 0000 0000 1000 00fd 0000 0000
0000010 1000 0175 0000 0000 1000 0173 0000 0000
0000020 1000 0171 0000 0000 1000 016f 0000 0000

i could not find something similare to the mac adress:
88:9E:33:F0:DE:CF

and in the file of hh40v:

				nvmem-layout {
					compatible = "fixed-layout";
					#address-cells = <1>;
					#size-cells = <1>;

					cal_art_1000: cal@1000 {
						reg = <0x1000 0x440>;
					};

					macaddr_art_0: macaddr@0 {
						reg = <0x0 0x6>;
					};

					macaddr_art_6: macaddr@6 {
						reg = <0x6 0x6>;
					};
				};

does this means that the mac adress is stored in: <0x6 0x6>? what is this number and how to verify the mac adress in that location?

i could not find a detailed guide on how to do this?
i hope that you can help.

[frollic]

mtd0 is the one least likely to have it stored.

[learner981]

@learner981

i try to show the u-boot content and manually search for the mac adress shown in the router interface

so where to find it?

[dibdot]

@learner981

alcatel hh41v

Derived from your nvmem layout I would guess that the ART partition is the correct one, likely /dev/mtd7 on the HH41V stores calibration and MAC data.
If so, dump the first 12 bytes, which include both MACs, and format them for readability, e.g.:

dd if=/dev/mtd7 bs=1 skip=0 count=12 2>/dev/null | hexdump -e '6/1 "%02X:" "\n"'

...of course, completely untested ...

[learner981]

thank you, it is working well. and i find that the adress showmn in luci are the same in that partition.
so the problem of the port not worknig may be due to other thing?

&eth0 {
	status = "okay";

	nvmem-cells = <&macaddr_art_0>;
	nvmem-cell-names = "mac-address";

	phy-handle = <&swphy4>;
};

&eth1 {
	compatible = "qca,qca9530-eth", "syscon", "simple-mfd";

	nvmem-cells = <&macaddr_art_6>;
	nvmem-cell-names = "mac-address";
};

the problem is in the eth0 (lan2/wan) port.
why there is: status = okay? while it does not exist in the second port?
and why the second has compatible qca and the other doesn't have?