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I have a Dlink DSL-2750U (Hardware version: C1) router. The router seems to have forgotten its MAC address and is showing the base MAC address as 00:10:18:00:00:00 which is the default.

I have flashed OpenWRT Chaos Calmer 15.05/ LuCI (git-15.248.30277-3836b45) firmware by accessing CFE with the help of this post here.

I need to figure out how to reset/add a MAC address to the router in the current scenario.

Please find more information about the router that I could get from cat /proc/mtd and cat /proc/cpuinfo

root@OpenWrt:/# cat /proc/cpuinfo
system type             : bcm63xx/96328dg2x2 (0x6328/0xB0)
machine                 : ADB P.DG A4001N
processor               : 0
cpu model               : Broadcom BMIPS4350 V7.5
BogoMIPS                : 319.74
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 32
extra interrupt vector  : yes
hardware watchpoint     : no
isa                     : mips1 mips2 mips32r1
ASEs implemented        :
shadow register sets    : 1
kscratch registers      : 0
package                 : 0
core                    : 0
VCED exceptions         : not available
VCEI exceptions         : not available

root@OpenWrt:/# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00010000 00010000 "CFE"
mtd1: 0011eb39 00010000 "kernel"
mtd2: 006c13c7 00010000 "rootfs"
mtd3: 00480000 00010000 "rootfs_data"
mtd4: 00010000 00010000 "nvram"
mtd5: 007e0000 00010000 "linux"

Please let me know if anything else is required from my side that could help.

PS: I checked out another question here but there's no file like art.img in my case.

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I can't comment so i am writing this as an answer. I don't think that original MAC address is lost. Have you checked /lib/firmware section ? In my case i had an linkit mt7688 and i needed the original MAC address and i have found it in /lib/firmware/xx.eeprom . But in some cases this eeprom file may be overwritten and partioned into 2 or more .bin files. If you have eeprom file , we can manage to dig something from it.

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