431F FortiAP with Cisco Switch - Wont Broadcast but broadcasts on FortiSwitch

[keller_ashum]

Hi Friends,

I am having trouble getting a 431F FAP to broadcast on my Cisco switch.

• It is connected to a trunk port.  The switch tags Native vlan 75 back to the FortiGate.
• VLAN 75 on my FortiGate LACP is able to receive traffic and gives out an IP address to the FAP on this interface.
• I can authorize the FAP to the Fortigate.  I can access the diagnostics and CLI via the FGT.
• The trunk port to the FAP allows ALL VLANs (probably not needed as it should tunnel via the VLAN75 interface right?)
• FortiAP diagnostics say the radio/ssid is UP but doesnt broadcast.  Admin up / int down.
• When the FAP is plugged into a fortiswitch, it broadcasts.  Even when the fortiswitch has 0 configuration, factory default.  I tested this by plugging in ethernet port 2 into the fortiswitch.  Whilst both ethernet cables are plugged in, my ssid broadcasts and I am able to authenticate into it.
• I dont think its a power issue because my cisco switch can supply 30 watts.  Auto mode - 15.4 watts.  Static power 30 watts. same issue.
• Lastly, it works when plugged into a fortiswitch that is configured.  No configuration changes on the Fortigate whatsoever.

So my question is, what am I missing in the Cisco / Fortigate side to make this work on a non - fortiswitch environment?

[jhussain_FTNT]

Hi,

Normally, if the Fortiap receives inadequate power, the SSID may not broadcast.

Kindly perform the following POE debug commands on the FortiAP.

cw_diag power

cw_diag debug poe 5
cw_debug on

After collecting the logs, turn off the debug as below.

cw_debug off

Regards

Jamal Hussain