Date: Tue, 24 Oct 2017 10:38:48 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Ralf Wenk <iz-rpi03@hs-karlsruhe.de>, freebsd-arm@freebsd.org Subject: Re: rpi3 - changing MAC address of ue0 between GENERIC and GENERIC-NODEBUG kernels Message-ID: <057df05d-9f0f-3cfd-516b-deb0444894b5@selasky.org> In-Reply-To: <E1e6tiR-007eDW-UU@smtp.hs-karlsruhe.de> References: <E1e6tiR-007eDW-UU@smtp.hs-karlsruhe.de>
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On 10/24/17 09:33, Ralf Wenk wrote: > Hello, > > as I noticed accidental, the MAC address of the ue0 interface on my > rpi 3 is changing between a kernel build with KERNCONF=GENERIC and > KERNCONF=GENERIC-NODEBUG from the same revision. > > It also changes between GENERIC kernels based on different revisions. > > It looks like the MAC address is stable for each kernel, because when > I boot a kernel from an older revision with a known ue0 MAC address > this older kernel uses the old known MAC address. > > I do crosscompiling the rpi3 world and kernel(s) on a amd64 FreeBSD > 12.0-Current. > > The firmware in the FAT partition is not changed between the kernels. > > As I do not see a common pattern in the MAC addresses, I think they are > more or less random memory bits. Examples: > d2:8f:50:a0:71:7a GENERIC r324918 > de:2a:39:1b:63:1f GENERIC-NODEBUG r324918 > 7e:45:9d:dc:5b:72 GENERIC r324694 > > $ uname -a > FreeBSD rpi3-b 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r324918: Mon Oct 23 > 21:46:36 CEST 2017 root@home:/usr/obj/arm64.aarch64/usr/src/sys/GENERIC-NOD > EBUG arm64 > $ > > Is anybody experiencing the same behavior? > Hi, I believe this topic has been discussed before. Try searching for this thread "How to change MAC address on RPI-B?" on this list first. --HPS
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