Date: Mon, 4 Jul 2022 15:30:25 -0400 From: Karl Denninger <karl@denninger.net> To: freebsd-arm@freebsd.org Subject: Re: 13.1R problems on Pi3 Message-ID: <35b616b9-6624-f3ad-6526-98fd0af31672@denninger.net> In-Reply-To: <20220704182526.GB1771@www.zefox.net> 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>
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This is a cryptographically signed message in MIME format. --------------ms080305060702020808050203 Content-Type: multipart/alternative; boundary="------------taSOWlbHoIX0mdn3YEEe0dek" --------------taSOWlbHoIX0mdn3YEEe0dek Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 7/4/2022 14:25, bob prohaska wrote: > On Mon, Jul 04, 2022 at 12:17:15PM -0400, Karl Denninger wrote: >> On 7/4/2022 11:28, bob prohaska wrote: >>> On Sun, Jul 03, 2022 at 10:36:35PM -0400, Karl Denninger wrote: >>> >>> Can any sense be made of the few ping responses obtained when ntp >>> is coming up? It's looks as if something happens after ntp runs >>> that blocks subsequent network traffic, but why starting an outbound >>> ping should partly unblock things is obscure to me. >> Yes.?? The odds are reasonably high that there is confusion as to which MAC >> address maps to which device.?? This implies there's a loop between the two >> switches (e.g. there is more than one way for packets to get into and out of >> each said switch to the other) or the two devices are claiming the same MAC >> address and thus when each "speaks" and performs ARP it "grabs" the map >> which works until the next one pipes up and it grabs it. >> > > Looks like that's the problem. There's only one cable between switches, but > here's what I get from ifconfig on each host: "ifconfig ue0 ether xx:xx:xx:xx:xx:xx" (or the stanza "ether xxxxx" in the ifconfig line in /etc/rc.conf to set the address) SHOULD work. Be aware that if it scrambles things you'll have to either use a console cable or pull power but that is supposed to work. You may also have to drop the connection to the switch (either with power or by pulling the ethernet cable) for it to recognize that the port has "reset" and should be re-learned although once again that's not SUPPOSED to be required. I recommend using the first three octets of some manufacturer that is basically impossible for you ever see on your network to prevent the possibility of stomping on something in the future by accident. The list of manufacturers can be found here: https://gist.github.com/aallan/b4bb86db86079509e6159810ae9bd3e4 -- Karl Denninger karl@denninger.net /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------taSOWlbHoIX0mdn3YEEe0dek Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> <div class="moz-cite-prefix">On 7/4/2022 14:25, bob prohaska wrote:<br> </div> <blockquote type="cite" cite="mid:20220704182526.GB1771@www.zefox.net"> <pre class="moz-quote-pre" wrap="">On Mon, Jul 04, 2022 at 12:17:15PM -0400, Karl Denninger wrote: </pre> <blockquote type="cite"> <pre class="moz-quote-pre" wrap=""> On 7/4/2022 11:28, bob prohaska wrote: </pre> <blockquote type="cite"> <pre class="moz-quote-pre" wrap="">On Sun, Jul 03, 2022 at 10:36:35PM -0400, Karl Denninger wrote: Can any sense be made of the few ping responses obtained when ntp is coming up? It's looks as if something happens after ntp runs that blocks subsequent network traffic, but why starting an outbound ping should partly unblock things is obscure to me. </pre> </blockquote> <pre class="moz-quote-pre" wrap=""> Yes.?? The odds are reasonably high that there is confusion as to which MAC address maps to which device.?? This implies there's a loop between the two switches (e.g. there is more than one way for packets to get into and out of each said switch to the other) or the two devices are claiming the same MAC address and thus when each "speaks" and performs ARP it "grabs" the map which works until the next one pipes up and it grabs it. </pre> </blockquote> <pre class="moz-quote-pre" wrap=""> Looks like that's the problem. There's only one cable between switches, but here's what I get from ifconfig on each host:</pre> </blockquote> <p>"ifconfig ue0 ether xx:xx:xx:xx:xx:xx" (or the stanza "ether xxxxx" in the ifconfig line in /etc/rc.conf to set the address) SHOULD work. Be aware that if it scrambles things you'll have to either use a console cable or pull power but that is supposed to work. You may also have to drop the connection to the switch (either with power or by pulling the ethernet cable) for it to recognize that the port has "reset" and should be re-learned although once again that's not SUPPOSED to be required.<br> </p> <p>I recommend using the first three octets of some manufacturer that is basically impossible for you ever see on your network to prevent the possibility of stomping on something in the future by accident. The list of manufacturers can be found here:</p> <p><a class="moz-txt-link-freetext" href="https://gist.github.com/aallan/b4bb86db86079509e6159810ae9bd3e4">https://gist.github.com/aallan/b4bb86db86079509e6159810ae9bd3e4</a>; </p> <div class="moz-signature">-- <br> Karl Denninger<br> <a href="mailto:karl@denninger.net" class="moz-txt-link-freetext">karl@denninger.net</a><br> <i>The Market Ticker</i><br> <font size="-2"><i>[S/MIME encrypted email preferred]</i></font></div> </body> </html> --------------taSOWlbHoIX0mdn3YEEe0dek-- --------------ms080305060702020808050203 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC DbowggagMIIEiKADAgECAhMA5EiKghDOXrvfxYxjITXYDdhIMA0GCSqGSIb3DQEBCwUAMIGL MQswCQYDVQQGEwJVUzEQMA4GA1UECAwHRmxvcmlkYTESMBAGA1UEBwwJTmljZXZpbGxlMRkw 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