this post was submitted on 19 Jul 2024
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34
[Solved] New Network Stack with an Unknown Issue..? (slrpnk.net)
submitted 4 months ago* (last edited 4 months ago) by Sunny to c/selfhosted@lemmy.world
22 comments fedilink hide all child comments
 

Update: It was DNS... its always DNS...

Hello there! I'm in a bit of a pickle.. I've recently bought the full budget Tp-link omada stack for my homelab. I got the following devices in my stack:

  • ER605 Router
  • OC200 Controller
  • SG2008P PoE Switch
  • EAP610 Wireless AP
  • EAP625 Wireless AP (getting soon)

I've set it all up and it was working fine for the first few days of using it. However, last few days it's been working very much on and off randomly(?) . Basically devices will state they are connected to WiFi/Ethernet, but they are not actually getting it. (As seen in the picture). This is happening with our phones(Pixel7+S23U) and my server(NAS:Unraid), have not noticed any problems on our desktop PCs. So it is happening on both wired and wireless, as my server and desktop PC is connected to the switch.

I haven't done many configurations in the omada software yet, but am assuming it's something I have done that causes this... Would greatly appreciate any advice to solve/troubleshoot this!

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[–] 69420@lemmy.world 38 points 4 months ago (2 children) 
It’s not DNS.
There’s no way it’s DNS.
It was DNS.

-SSBroski

[–] 667@lemmy.radio 6 points 4 months ago

A buddy experienced the exact same issue as OP just the other day. We ran diagnostics and it turns out his computer was running deprecated DNS IPs for a popular ad-blocking DNS provider.

It was DNS.

[–] Sunny 5 points 4 months ago

omg i cant believe it actually was DNS... hahahah

I had it at default settings - but all of my devices are connected over Tailscale which uses NextDNS. Somehow when connected to the WiFi i guess things weren't compatible...? Anyway i changed my Omada system to use NextDNS and voila! all devices connects flawlessly!

[–] catloaf@lemm.ee 11 points 4 months ago (1 children)

Start at the bottom and work your way up. Cables connected? Link lights on? Link up in the OS? Getting a valid DHCP lease? Can reach outside IP addresses, DNS servers, resolve hostnames?

[–] Sunny 1 points 4 months ago

It was DNS... godammit...

[–] tychosmoose@lemm.ee 5 points 4 months ago (1 children)

The WiFi icon with good connection+ exclamation on Android means the connection to the access point is good, but you don't have a path to the internet. I would start by connecting a PC, wired, directly to your router. Make sure that's working. If not, get some specifics on what's failing and troubleshoot.

Then connect to the switch. Repeat. Then connect to an app, repeat.

[–] Sunny 1 points 4 months ago

It was DNS... thanks for the help nonetheless!

[–] mumblerfish@lemmy.world 3 points 4 months ago (1 children)

Good thing you solved it, then it feels better to try and make this joke:

The reason it's not working is because you are on the wrong network, that is nacho' wifi.

[–] Sunny 1 points 4 months ago

Hahaha I liked the name too much not to use it myself 😅

[–] just_another_person@lemmy.world 2 points 4 months ago* (last edited 4 months ago) (1 children)

Did you disable DHCP on your access points? This sure sounds like you may have plugged everything in and didn't setup the network IP space and addressing properly. You should only have one DHCP provider on a network, and this seems like you have multiple running.

[–] Sunny 1 points 4 months ago

It was DNS...

[–] tofubl@discuss.tchncs.de 2 points 4 months ago (1 children)

Had similar behaviour last night. Turned out UnboundDNS had crashed in my opnsense firewall and took "internet connectivity" with it. Restarting the service fixed it in one click after I found it.

[–] tofubl@discuss.tchncs.de 2 points 4 months ago* (last edited 4 months ago) (1 children)

Terrible opsec sharing your WiFi SSID, by the way. I can't find one right now, but I've seen global "wardriving" maps of all broadcast WiFi SSIDs that allow to pinpoint a somewhat unique SSID or at least narrow down to a few options. A list of SSIDs around you pretty much gives away your precise location.

[–] Sunny 1 points 4 months ago

Fair point, I'd love to take a look at this resource though if you find back to it!

[–] Decronym@lemmy.decronym.xyz 2 points 4 months ago* (last edited 4 months ago)

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters More Letters
AP WiFi Access Point
DHCP Dynamic Host Configuration Protocol, automates assignment of IPs when connecting to a network
DNS Domain Name Service/System
IP Internet Protocol

[Thread #879 for this sub, first seen 20th Jul 2024, 01:45] [FAQ] [Full list] [Contact] [Source code]

[–] xavier666@lemm.ee 2 points 4 months ago

In times like this, I usually recite my favourite haiku to calm myself down.

[–] socphoenix@midwest.social 1 points 4 months ago* (last edited 4 months ago) (1 children)

The only thing I see linking those devices are loosely speaking being Linux based.

Does the local connection work? Or are you unable to ping other devices on the lan?

I would guess it’s a switch issue assuming they can’t talk on the lan to each other.

[–] Sunny 1 points 4 months ago (1 children)

Not tried pinging (when it's not working). However I'm unsure this is a problem with the switch if my wireless devices are also having the issue? Unless you mean the AP itself is being affected by this?

[–] socphoenix@midwest.social 1 points 4 months ago (1 children)

Whatever you are using that provides the brains of the network (like dhcp) in your setup probably the router or controller? I’ve never needed to move past an all in one but it seems like an intermittent routing issue. Have you u checked device logs to see if part of your network equipment is crashing or rebooting during these outages?

[–] Sunny 2 points 4 months ago (1 children)

It was DNS... its always DNS... godammit...

[–] socphoenix@midwest.social 1 points 4 months ago

Least you got it working again!