Date: Sat, 26 Nov 2016 10:20:57 +0100 From: "John W. Kitz" <John.Kitz@xs4all.nl> To: <freebsd-arm@freebsd.org> Subject: RE: How to change MAC address on RPI-B? Message-ID: <000901d247c6$6a8d5670$3fa80350$@Kitz@xs4all.nl> In-Reply-To: <177ae37f-db52-c7ee-77fa-d9bc7d61b4ee@t-online.de> References: <001701d245ce$e64e33f0$b2ea9bd0$@Kitz@xs4all.nl> <454137dc-30f7-cd33-6c75-0cc3045090dd@t-online.de> <002801d24755$f9017420$eb045c60$@Kitz@xs4all.nl> <177ae37f-db52-c7ee-77fa-d9bc7d61b4ee@t-online.de>
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Reiner, My remarks are based on this example: "autoload=no ethaddr=12:34:56:78:99:aa <=== fdt_high=ffffffff serverip=192.168.1.130 bootargs=earlyprintk console=ttyS0,115200 boot_tftp=dhcp; tftp 0x46000000 arch/arm/boot/uImage; tftp 0x49000000 arch/arm/boot/dts/sun7i-a20-cubieboard2.dtb; bootm 0x46000000 - 0x49000000 uenvcmd=run boot_tftp" which I found in this http://linux-sunxi.org/UEnv.txt article and a bit of documentation that is being referred to in it, which can be found here https://www.kernel.org/doc/Documentation/kernel-parameters.txt. > So when doing so the locally administered MAC address is passed on > from uEnv.txt to the O/S during boot and is then used to override the > globally I didn't think, that it will be passed from the U-Boot Enviroment settings. You can set the MAC address, but the FreeBSD kernel shows always the unique MAC address. JKi: Please note that my remarks weren't intended to be a statement, rather a question. > unique MAC address or does the O/S check both the information found in > its configuration files and what is configured in uEnv.txt before > configuring and activating the network interface(s)? Which configuration files do you mean? AFAIK there is only the FDT blob. I guess it ignores the setting in uEnv.txt. JKi: Also please note that I have no experience using an ARM based board at this time. I've only ordered one recently. > Makes me wonder which of the two (i.e. locally administered through > uEnv.txt or locally administered through the O/S) takes precedence. Only the unique MAC address and the locally administered MAC address, will take affect. JKi: Looking at the email exchange on this topic I thought it was established previously that this can't be true. > In addition this might affect configuration decisions when one would > want to configure a device for net booting (at least when browsing > through what can be configured by means of uEnv.txt I believe that was > one of the options I > saw) through uEnv.txt? Regards, Jk.
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