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<div dir="auto">Nope. As far as I know nothing hardware wise changed between when it was working and when it stopped. The switches are both current netgear 5port that absolutely support switching wires. The fact that two netgear switches can talk to each other across the building wires implies the issue is with the AT&T router being unhappy with something and not playing nice. This could have been a firmware update to the router.. </div><div id="aqm-signature" dir="auto" style="color: black;"><div dir="auto"><br></div><div dir="auto">-derek</div><div dir="auto">Sent using my mobile device. Please excuse any typos. </div></div><div dir='auto'><br></div>
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<p style="color: black; font-size: 10pt; font-family: sans-serif; margin: 8pt 0;">On April 11, 2019 4:46:01 PM Jim Kinney via Ale <ale@ale.org> wrote:</p>
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<div>I thought the switch changed. Thus new switch doesn't have auto and wiring is backwards.</div><div><br></div><div>On Thu, 2019-04-11 at 13:20 -0700, Alex Carver via Ale wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>Good point, the Uverse router does not have auto MDI/MDX capability on</pre><pre>its ports and not all switches have that either (or they have it only on</pre><pre>specific ports). However, since this configuration worked at first and</pre><pre>now does not would imply the wiring was OK originally so crossovers</pre><pre>shouldn't have happened unless any of the building wiring was changed.</pre><pre><br></pre><pre>As for number of wires, yes 100Base-T only requires two pairs but the</pre><pre>other two dead pairs are actually very important for maintaining</pre><pre>impedance in the cable suitable for use at 100 MBit.</pre><pre><br></pre><pre>On 2019-04-11 12:11, Jim Kinney via Ale wrote:</pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>You might want to test the line in the wall and see if it's wired A/A,</pre><pre>B/B or cross-over style A/B at the wall jacks. The color coding needs</pre><pre>to be identical on both ends of the connection in nearly all cases.</pre><pre>Unless the new switch is just too stupid. Used to be switch to switch</pre><pre>REQUIRED a crossover cable. Most, but not all, are now smart enough to</pre><pre>reverse in/out on plug-in. </pre><pre>On Thu, 2019-04-11 at 10:13 -0400, Derek Atkins via Ale wrote:</pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>Hi,</pre><pre>Alex Carver via Ale <</pre><a href="mailto:ale@ale.org"><pre>ale@ale.org</pre></a><pre>> writes:</pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>It might still be a firmware update that at first didn't have</pre><pre>VLANsupport and then later did.</pre><pre>If you want to really test it, gather everything up together in</pre><pre>onelocation and replicate the configuration you have (TV + Router</pre><pre>intoswitch, switch into modem) with short patch cables. If all</pre><pre>works wellthen yes you've got a broken wire in the infrastructure</pre><pre>wiring. If itdoesn't work you've got a VLAN problem.</pre></blockquote><pre><br></pre><pre>When I connect the switch directly to the router locally, the</pre><pre>linklights up (i.e, I get blinky lights both on the router and on the</pre><pre>switch).</pre><pre>When I connect the switch through the wall, the link lights do</pre><pre>NOTilluminate, either on the switch or on the router.</pre><pre>A VLAN misconfiguration would not cause this behavior.</pre><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>It's also strange to see that your in-wall wiring is two pairs but</pre><pre>wiredto 8p8c jacks? Is it unshielded twisted pair (CAT3) or is it</pre><pre>a bundledrun (straight wire) meant only for voice (in which case it</pre><pre>should havebeen using 6p4c/RJ12 connectors).</pre></blockquote><pre><br></pre><pre>There are many many pairs of wires in there. It's probably cat3</pre><pre>cable,but there are probably 5-6 pairs in there. There is a single</pre><pre>cable withmany pairs that goes into the box in the other room, and</pre><pre>two pairs areconnected to the RJ45.</pre><pre>They need to use a 8p jack because it is ETHERNET. Remember that</pre><pre>atleast 100BaseT only requires 2 pairs, and I think GigE also</pre><pre>onlyrequires 2 pairs.</pre><pre>I just don't understand why the switch is unhappy behind the 2 pairs</pre><pre>butmy other devices are just fine. I.e., it doesn't matter whether I</pre><pre>plugin the Uverse box or the Smart TV -- both of them work</pre><pre>(individually) inthe other room. But if I put the switch there, the</pre><pre>switch wont sync tothe router.</pre><pre>-derek</pre><pre><br></pre><pre>_______________________________________________</pre><pre>Ale mailing list</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre><br></pre><a href="https://mail.ale.org/mailman/listinfo/ale"><pre>https://mail.ale.org/mailman/listinfo/ale</pre></a><pre><br></pre><pre>See JOBS, ANNOUNCE and SCHOOLS lists at</pre><a href="http://mail.ale.org/mailman/listinfo"><pre>http://mail.ale.org/mailman/listinfo</pre></a><pre><br></pre></blockquote></blockquote><pre><br></pre><pre>_______________________________________________</pre><pre>Ale mailing list</pre><a href="mailto:Ale@ale.org"><pre>Ale@ale.org</pre></a><pre><br></pre><a href="https://mail.ale.org/mailman/listinfo/ale"><pre>https://mail.ale.org/mailman/listinfo/ale</pre></a><pre><br></pre><pre>See JOBS, ANNOUNCE and SCHOOLS lists at</pre><a href="http://mail.ale.org/mailman/listinfo"><pre>http://mail.ale.org/mailman/listinfo</pre></a><pre><br></pre></blockquote><div><span><pre><pre>-- <br></pre>James P. Kinney III
Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain
http://heretothereideas.blogspot.com/
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