<html dir="ltr"><head></head><body style="text-align:left; direction:ltr;"><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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