1 device knocks out wifi but is fine after a reset

1 device knocks out wifi but is fine after a reset

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gregs656

Original Poster:

11,203 posts

187 months

Thursday 21st September 2023
quotequote all
I'll preface this by saying I'm happy to have a go at networking stuff but quickly get out of my depth.

My network is a router from my provider, a second router I have wired up as an access point with the same SSID, and I run an old Raspberry Pi with PiHole.

Maybe a year a go I had this problem where one device (a frien'ds phone) would knock out my wifi and I would have to reset it, they replaced my router as part of a different conversation and the problem went away - that was before I was running PiHole but everything else was the same.

Now it's back - my partners work laptop consistently knocks out the wifi the first time it connects after a break. If he's here for an extended period it will be fine the entire time he's here, but if he takes the laptop away for more than a short while it will knock out the wifi when he brings it back.

Any ideas? It's predictable behavior and my wifi is generally stable,

mattley

3,025 posts

228 months

Thursday 21st September 2023
quotequote all
gregs656 said:
a second router I have wired up as an access point with the same SSID
Turn this off, does it still do it?

You've got 3 DHCP server capable devices are you sure only one is active as a DHCP server?

Is it just WiFi? do wired devices continue to function?



gregs656

Original Poster:

11,203 posts

187 months

Thursday 21st September 2023
quotequote all
I'll try wired devices next time it happens.

Confident that just got one DHPC device operating as a server - the AP has been running like that for over 2 years, the RPi for around 18 months.

mattley

3,025 posts

228 months

Thursday 21st September 2023
quotequote all
Don't let what has been running for years get in the way of methodical troubleshooting.

Turn everything but the ISP supplied router off, and see if the problem replicates, then turn stuff on bit by bit and test every time, you'll find what's causing the problem then why can be addressed.



gregs656

Original Poster:

11,203 posts

187 months

Friday 22nd September 2023
quotequote all
mattley said:
Don't let what has been running for years get in the way of methodical troubleshooting.

Turn everything but the ISP supplied router off, and see if the problem replicates, then turn stuff on bit by bit and test every time, you'll find what's causing the problem then why can be addressed.
I'll give it a go and report back.

Road2Ruin

5,408 posts

222 months

Friday 22nd September 2023
quotequote all
gregs656 said:
I'll try wired devices next time it happens.

Confident that just got one DHPC device operating as a server - the AP has been running like that for over 2 years, the RPi for around 18 months.
Is their laptop looking for a fixed IP address that is already taken? On a reboot it may allocate them differently.