Re: duplicate MAC - Re: 13.1R problems on Pi3
- Reply: Mark Millard : "Re: duplicate MAC - Re: 13.1R problems on Pi3"
- In reply to: bob prohaska : "Re: duplicate MAC - Re: 13.1R problems on Pi3"
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Date: Tue, 05 Jul 2022 23:37:42 UTC
On 7/5/2022 19:34, bob prohaska wrote: > On Tue, Jul 05, 2022 at 07:02:18AM -0700, Mark Millard wrote: > >>> So for you I would guess: >>> >>> ifconfig_ue0="ether ??:??:??:??:??:?? inet 50.1.20.28 netmask 255.255.255.0" > > I tried a few variants, all produced a dead connection. > > Using one like you suggested: > > # ethernet address increased by 1 in the last digit > ifconfig ue0="ether b8:27:eb:71:46:4f inet 50.1.20.28 netmask 255.255.255.0" > > produced a flood of errors during boot: > ifconfig: interface ue0=ether b8:27:eb:71:46:4f inet 50.1.20.28 netmask 255.255.255.0 does not exist > > There was clearly no network connectivity, but the serial console > remained responsive. The host sharing the same MAC address exhibited > no connectivity problems. > > > Another suggestion was found in an old forum post, assigning the IP > in the usual fashion but adding an alias: > > ifconfig_ue0="inet 50.1.20.28 netmask 255.255.255.0" > ifconfig_ue0_alias0="link b8:27:eb:71:46:4f" > (trading ether for link had no effect) > > resulted in the gateway (and everything else) being unreachable. > > Thanks for writing! > > bob prohaska Crap - you have to see if you can get u-boot (e.g. in config.txt) to do it then.... that's not supposed to happen (manufacturing two devices with the same MAC address) and is EXTREMELY not-nice for the very reason you've discovered. Linux's boot line has an override available for it, so there IS a way. -- Karl Denninger karl@denninger.net /The Market Ticker/ /[S/MIME encrypted email preferred]/