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unusual problem with networking router/switch

slag

slag

Lifer
I made a 75 foot Gig E cable this weekend and ran it from my basement to the 2nd floor office. I tested the cable with my tester and all 8 strands show they are good. If I plug it into my laptop or wife's computer on the 2nd floor, everything works great. If I run it through a switch or a DDWRT router on the 2nd floor, I get nothing. NADA, ZIP Zilch.

I cannot grab an IP and cannot get on the network. Both switch and router were working fine just a day ago so I don't think its my equipment. I've set up the router accordingly so there is no issue there, but even without the router, just using my switch, I should be able to get a connection and I don't. I have ruled out the cable from the switch to my wife's computer as well.

I'm lost. Is this simply a low signal/noise ratio and I've hit the threshold when using a switch or is there more to this?
 
Are you talking about connecting two switches together with the same cable? If so you'd need a crossover cable if your devices can't do auto-MDX
 
alkemyst said:
Are you talking about connecting two switches together with the same cable? If so you'd need a crossover cable if your devices can't do auto-MDX
Click to expand...

Talking about connecting my uverse modem/router to this switch. I've not had to use a crossover in the past with it.
 
Dslreports should have a write up for your modem/router and the switch you are using. It sounds like an addressing issue.

So a normal store bought ethernet cable works fine, but the 75' one doesn't? If that's the case it's got to be the cable...many laptops/pc nics will auto-mdx today correcting cable issues.
 
I'm going to go home tonight and try to network it all together with a smaller cable in the basement near the uverse router. If I can get it to work there, then it should work upstairs also.

Its raining so a perfect night to do this. Thanks for the advice y'all
 
Well, its the cable. Tests fine, but doesn't work. I wonder if its the crosstalk since I didn't wire it how it should be wired, but rather just so the wires are in the same positions on the plug. It's cat 6 solid core cable fwiw. I'll put new connectors on and wire them like they should and see if it makes a difference.

I did test the router and patch cables and they work fine. I was able to make a network in the basement directly off the uverse router and everything worked great.
 
slag said:
Well, its the cable. Tests fine, but doesn't work. I wonder if its the crosstalk since I didn't wire it how it should be wired, but rather just so the wires are in the same positions on the plug. It's cat 6 solid core cable fwiw. I'll put new connectors on and wire them like they should and see if it makes a difference.

I did test the router and patch cables and they work fine. I was able to make a network in the basement directly off the uverse router and everything worked great.
Click to expand...

Try patching on a couple of keystones (color coded) and use premade patch cords to connect to the devices. Typically RJ45 mod ends on solid core = auto fail in my book. It might work, might not. Might work for awhile etc.
 
imagoon said:
Try patching on a couple of keystones (color coded) and use premade patch cords to connect to the devices. Typically RJ45 mod ends on solid core = auto fail in my book. It might work, might not. Might work for awhile etc.
Click to expand...

The ends I bought were specifically made for solid core. I don't have keystones currently but have placed an order for some off Amazon.com. I have the premade multi strand patch cables already, but wanted to get this network installed and working pronto so I could cancel our other ISP (We have two coming into the house and want to cancel one).
 
slag said:
The ends I bought were specifically made for solid core. I don't have keystones currently but have placed an order for some off Amazon.com. I have the premade multi strand patch cables already, but wanted to get this network installed and working pronto so I could cancel our other ISP (We have two coming into the house and want to cancel one).
Click to expand...

I feel for you but I would still say: "don't do it." Fix it when you can basically.
 
slag said:
Well, its the cable. Tests fine, but doesn't work. I wonder if its the crosstalk since I didn't wire it how it should be wired, but rather just so the wires are in the same positions on the plug. It's cat 6 solid core cable fwiw. I'll put new connectors on and wire them like they should and see if it makes a difference.

I did test the router and patch cables and they work fine. I was able to make a network in the basement directly off the uverse router and everything worked great.
Click to expand...

There is a reason the internal cables are wired a certain way....it's not hard to do it right.

At least the physical layer was identified.
 
Redid the ends. Works.

Well, until you move the wire. I think I have a short about 4-8 inches from the end of the cable. I'll snip off a foot and retry, but it was working last night if I bent the cable the right way.
 
slag said:
Redid the ends. Works.

Well, until you move the wire. I think I have a short about 4-8 inches from the end of the cable. I'll snip off a foot and retry, but it was working last night if I bent the cable the right way.
Click to expand...

This can also be a bad mod end crimp. Moving the wire causes the copper to slide a bit in the mod and no longer contact the blade. This why mod ends on solid core is a "bad idea [TM]"
 
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