From nobody Tue Jul 05 23:37:42 2022 X-Original-To: freebsd-arm@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4D0481D040EF for ; Tue, 5 Jul 2022 23:38:20 +0000 (UTC) (envelope-from karl@denninger.net) Received: from colo1.denninger.net (colo1.denninger.net [104.236.120.189]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4Lczd734mBz4hyr for ; Tue, 5 Jul 2022 23:38:19 +0000 (UTC) (envelope-from karl@denninger.net) Received: from denninger.net (097-081-026-048.res.spectrum.com [97.81.26.48]) by colo1.denninger.net (Postfix) with ESMTP id 130352110A8 for ; Tue, 5 Jul 2022 19:37:43 -0400 (EDT) Received: from [192.168.10.25] (D15.Denninger.Net [192.168.10.25]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by denninger.net (Postfix) with ESMTPSA id 9B4CC1E0EB5 for ; Tue, 5 Jul 2022 19:37:42 -0400 (EDT) Message-ID: <0cd9ee13-9340-8bc4-2b92-171ca83534ee@denninger.net> Date: Tue, 5 Jul 2022 19:37:42 -0400 List-Id: Porting FreeBSD to ARM processors List-Archive: https://lists.freebsd.org/archives/freebsd-arm List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-arm@freebsd.org MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: duplicate MAC - Re: 13.1R problems on Pi3 Content-Language: en-US To: freebsd-arm@freebsd.org References: <20220704003639.GA1165@www.zefox.net> <8820A9EC-A25E-4D0A-9F8F-52114E58B66F@yahoo.com> <6c377413-9430-54d2-3f92-1215055ca30a@denninger.net> <20220704152834.GA1771@www.zefox.net> <7ce87eef-ded5-8b00-3f11-14407b8af78d@denninger.net> <20220704182526.GB1771@www.zefox.net> <212C86C0-17DB-45F5-A59D-8BDC1932378E@yahoo.com> <1645012198.135.1657014956867@localhost> <6B24FF55-7010-40ED-B32B-AA46F0E7ED80@yahoo.com> <20220705233440.GA9228@www.zefox.net> From: Karl Denninger In-Reply-To: <20220705233440.GA9228@www.zefox.net> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms010402030102010600010609" X-Rspamd-Queue-Id: 4Lczd734mBz4hyr X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=pass (policy=none) header.from=denninger.net; spf=pass (mx1.freebsd.org: domain of karl@denninger.net designates 104.236.120.189 as permitted sender) smtp.mailfrom=karl@denninger.net X-Spamd-Result: default: False [-5.89 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; FREEFALL_USER(0.00)[karl]; FROM_HAS_DN(0.00)[]; SIGNED_SMIME(-2.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.20)[multipart/signed,multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-arm@freebsd.org]; TO_DN_NONE(0.00)[]; HAS_ATTACHMENT(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-1.00)[-1.000]; RCVD_COUNT_THREE(0.00)[3]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.99)[-0.991]; DMARC_POLICY_ALLOW(-0.50)[denninger.net,none]; MLMMJ_DEST(0.00)[freebsd-arm]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:+,3:~,4:~]; ASN(0.00)[asn:14061, ipnet:104.236.64.0/18, country:US]; RCVD_TLS_LAST(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RECEIVED_SPAMHAUS_PBL(0.00)[97.81.26.48:received] X-ThisMailContainsUnwantedMimeParts: N This is a cryptographically signed message in MIME format. --------------ms010402030102010600010609 Content-Type: multipart/alternative; boundary="------------e4eK8zv6PLvPt9naYuNhQ0pB" --------------e4eK8zv6PLvPt9naYuNhQ0pB Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit 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]/ --------------e4eK8zv6PLvPt9naYuNhQ0pB Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit
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]
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