[SOLVED] flaky switch?

[glennd]

Has anyone ever come across this scenario?

TP-Link Archer wifi modem router. Can't remember the model but business class.

My Win7 laptop is connected to eth1 on the router and looking at the admin page. The moment I plug the router into the D-Link switch, the router eth port stops functioning.

Leave the laptop plugged in. Unplug the switch. Reboot the router. Wait for the admin page to come back. Wait for adsl to connect. Plug in the switch and all eth ports on the router stop functioning. Try a brand new modem router, configure the adsl and plug in the switch, same result.

It appears when I plug in this D-Link switch to the router, all eth ports on the router stop functioning. The leds on the switch continue to flash as a switch does.

 

[GTP]

Have you tried another switch?

 

[glennd]

Have you tried another switch?

doing that tomorrow. thought I would put it out there cos it seems so unlikely....

 

[glennd]

Indeed it was unlikely.

The customer in question has had another tech in the place messing with the network rack.

I took a spare switch and plugged everything in and got exactly the same results. Unplugged everything and began plugging in each cable in to the switch one at a time and watched for when the router stopped responding. At about the fifth plug the router stopped. Unplug, works, plug in, stops, unplug works....

Find out what what this cable is connected to: follow it down the back of the rack box, down through the hole in the bottom, out the box, into the rats nest below, around and around, back up the nest, back into the rack box, back up and into the switch!!

That problem solved. Next, can someone educate me on Unifi Switch 8 60W. Is there any reason you would connected 2 ports from it back to the main dumb switch??

 

[Slaters Kustum Machines]

Next, can someone educate me on Unifi Switch 8 60W. Is there any reason you would connected 2 ports from it back to the main dumb switch??

Not really. If the non-unifi switch had the ability to do port groups it "could" be useful, but other than that I can't see a good reason for it. It's likely to cause spanning tree to throw a fit.

 

[glennd]

Not really. If the non-unifi switch had the ability to do port groups it "could" be useful, but other than that I can't see a good reason for it. It's likely to cause spanning tree to throw a fit.

That's what I thought. I'm shaking my head....

These people have too many chiefs, I think I'll have to have a conversation with my contact.