Clients connected to AP doesn't get an IP address

[jesper_frydenre]

Hi,

I have a couple of access points where clients doesn't get an IP address. When first configured, a couple of clients shortly gets an IP address, but is dropped again. The following clients that tries to logon can't obtain a IP address. The config on switchports is exactly the same as for a AP where it works.

I can see in the client monitor that a DHCP:

02-11-2018 10:41:40 AM  605718EB3930  08EA447E3D96  AH-7e3d80       INFO    (978)station sent out DHCP DISCOVER message

02-11-2018 10:41:45 AM  605718EB3930  08EA447E3D96  AH-7e3d80       INFO    (979)station sent out DHCP DISCOVER message

02-11-2018 10:41:53 AM  605718EB3930  08EA447E3D96  AH-7e3d80       INFO    (980)station sent out DHCP DISCOVER message

No IP address is obtained and I can figure out why.

Any good ideas?

[SamPirok]

Hi Systemscsn, I might recommend starting a new topic thread with your question. Just speaking from personal experience, my past cases seem to blend together after a while, going back to a specific issue from 2 years ago would be a challenge. But I’m sure our community members can help you out if you wanted to start this conversation again on a new thread. 

[systemscsn]

wow, seems no one comes back here to answer questions, or tell you if their issue was fixed, and how.  Not great.

[systemscsn]

Did you ever get an answer to this?  we just went through hell with pretty much the same issue you are describing.  We attributed it to a bad gbic somewhere on our campus, but id be very, very interested in whether anyone ever got back to you and what they said, or how you fixed it.  Jason.

[jesper_frydenre]

Hi David,

Ports are tagged with native VLAN. All VLANS is allowed on the port.

interface GigabitEthernet3/0/24

 description ### AP08 ###

 switchport trunk encapsulation dot1q

 switchport trunk native vlan 2030

 switchport mode trunk

 priority-queue out

 mls qos trust dscp

 no snmp trap link-status

Yes, DHCP server is listening. A PC connected to the port obtain an IP address. As written, when the AP is configured first time (after profile have been uploaded to AP) a couple of clients gets an IP address shortly, but the IP is dropped shortly after.