topic Clients not getting DHCP on certain AP in Access Points - Indoor and Outdoor

Clients not getting DHCP on certain AP

dragos_dimitriu — Sat, 24 Nov 2018 11:38:05 GMT

Hi all,

We curretly have a setup with 120 AP's R310 being managed by a SZ100. Network is divided into subnets ,each subnet having a different DHCP pool and VLAN.
On one particular subnet ( comprised of 24 AP) I have a strange problem with one of the AP's in the sense that clients associated to the AP cannot get an IP address from the DHCP
While troubleshooting the problem with the Troubleshot tool inside SZ we have seen that client correctly authenticates and associates with that articular AP and starts sending DHCP Discover messages but gets no answer from the DHCP server.

Other notes
SZ100, fimware version 3.6.1.0.227
All other AP's and clients within that subnet work flawlessly ( all clients getting IP addresses from the DHCP server)
DHCP server has still enough leases
SNR and RSSI for clients look ok
That specific AP is also flagged with 'Connection failures' main reason being DHCP

Can someone give a hint where to go on with teh investigation ?

Regards

Re: Clients not getting DHCP on certain AP

david_black_594 — Sat, 24 Nov 2018 11:52:52 GMT

It sounds like there’s a misconfigured switch port. It’s either not trunked or it’s missing a vlan.

Re: Clients not getting DHCP on certain AP

DarrelRhodes — Mon, 26 Nov 2018 10:19:19 GMT

Hi Dragos,
I agree with David's post above. Can you configure a client with a manual IP and see if you have IP conectivity back to your wired network?
Thanks,
Darrel.

Re: Clients not getting DHCP on certain AP

wcs1236 — Mon, 11 Mar 2024 12:38:00 GMT

This was the exact fix I had been looking for for weeks! I had developed a tunnel vision of what the problem could be and your answer was exactly right. Thank you!