laptop no internet on one access point & ssid

[mrstrong]

got an issue with a laptop that won't connect properly:

it gets limited connectivity orange exclamation and a 169 IP.

 

Weird thing is other laptops are fine on same network/ssid and access point (unifi).

 

Also only seems to happen on this one access point, e.g. different room laptop connects fine.

 

Doubly weird is that it will connect to a different wifi network (different ssid) via the "bad" access point

though to be fair DHCP is done by a different server on this ssid.

 

Apparently just started happening this week, "always worked before" (according to teacher anyway)

 

Bit baffled, Any ideas what could be causing it ?

[DalekSec]

Driver issue?

[localtech]

Had this with the a couple of laptops on Unifi AP's, again working fine one day next no joy driver update needed

[forkies]

Sounds more like a VLAN issue to the AP so it can’t pass the traffic for the VLAN the laptop is trying to connect on.

[mrstrong]

thanks all,

 

will check driver though pretty sure other same model laptops have same driver version and work ok.

Thats the weird thing, its just this laptop, could it be hardware issue on laptop?

 

Did push out a few windows updates last week also (the ones that break printing )

 

The ssid that works ok is on a different vlan and smoothwall does dhcp for it (windows server does DHCP for other ssid that doesn't work).

 

This AP also goes through an 8 port switch before uplink to main switch whereas other APs go straight to main switch.

 

Might try rebooting all switches e.g. clear MAC tables.

 

Wonder if could be some weird wifi issue, no expert on wifi but on ssid that worked it was showing as

Channel 11 (11ng) but AP also does seems to have 5GHz on channel 36, wonder if I can try force channel 11 for other ssid (e.g instead of Channel 36 (11ac))

 

The AP is getting a bit of hammer, its a UniFi AP-AC-Pro, 10 guests, 80% memory.

[psydii]

Before you bounce the switches have you rebooted the AP yet?

 

Also check/delete the devices entry on the DHCP server(s)...

 

Also 'always worked before' is not a trustworthy metric. Had this once, but then looked into it and the laptop hadn't actually been used in the three months since it had been deployed (in a fleet of 30)... looking back the card was almost certainly DOA!

[mrstrong]

annoyingly after being told yesterday this was "top priority" teacher has now disappeared with laptop

presumed "working from home as wifi rubbish in school". So looks like will have to wait till new year as

we all break up tomorrow.

[mrstrong]

just an update, before hols I rebooted the 8 port switch and thus the AP which is plugged in to it and gets PoE.

 

Managed to get hold of laptop this week and test it and its working fine now.

 

So good news but wish I knew why