mac address issue of tp-link wdr3600 and archer c7-v2

[Paul D]

C7v2 here. 21.02

eth0: 73
eth1: 72 (br-lan)
wlan0: 71 (11n+ac, 5GHz)
wlan1: 72 (11bgn, 2.4GHz)

Works fine as is.



On 2021-11-15 21:04, e9hack wrote:
> 
> Hi,
> 
> I'm using two tp-link routers. Both are using the same mac address for 
> one eth and one wlan interface:
> 
> archer c7-v2:
> uboot    60:xx:xx:xx:xx:E6
> eth0    60:xx:xx:xx:xx:E7
> eth1    60:xx:xx:xx:xx:E6
> wlan0    60:xx:xx:xx:xx:E4    5G
> wlan1    60:xx:xx:xx:xx:E6    2.4G
> 
> wdr3600:
> uboot    C0:xx:xx:xx:xx:60
> eth0    C0:xx:xx:xx:xx:60
> wlan0    C0:xx:xx:xx:xx:5F    2.4G
> wlan1    C0:xx:xx:xx:xx:60    5G
> 
> It looks like if an address decrement is missing for one wlan interface. 
> I don't know if this can trigger a problem.
> 
> With a small patch, I did fix it for both of my routers:
> 
> --- a/target/linux/ath79/dts/ar9344_tplink_tl-wdr4300.dtsi
> +++ b/target/linux/ath79/dts/ar9344_tplink_tl-wdr4300.dtsi
> @@ -82,6 +82,7 @@
>   &ath9k {
>          nvmem-cells = <&macaddr_uboot_1fc00>;
>          nvmem-cell-names = "mac-address";
> +       mac-address-increment = <(-2)>;
>   };
> 
>   &wmac {
> --- a/target/linux/ath79/dts/qca9558_tplink_archer-c7-v2.dts
> +++ b/target/linux/ath79/dts/qca9558_tplink_archer-c7-v2.dts
> @@ -64,6 +64,7 @@
> 
>          nvmem-cells = <&macaddr_uboot_1fc00>;
>          nvmem-cell-names = "mac-address";
> +       mac-address-increment = <(-1)>;
>   };
> 
>   &uboot {
> 
> Now I get:
> 
> archer c7-v2:
> eth0    60:xx:xx:xx:xx:E7
> eth1    60:xx:xx:xx:xx:E6
> wlan0    60:xx:xx:xx:xx:E4    5G
> wlan1    60:xx:xx:xx:xx:E5    2.4G
> 
> wdr3600:
> eth0    C0:xx:xx:xx:xx:60
> wlan0    C0:xx:xx:xx:xx:5F    2.4G
> wlan1    C0:xx:xx:xx:xx:5E    5G
> 
> I don't know, if exist some rule whether decrement by -1/-2 shall refer 
> to the interface number or to the frequency.
> 
> Regards,
> Hartmut
> 
> _______________________________________________
> openwrt-devel mailing list
> openwrt-devel at lists.openwrt.org
> https://lists.openwrt.org/mailman/listinfo/openwrt-devel