Troubleshooting Tip: FortiAP G and K series shows operating channel '0'.
| Description | This article describes an issue that occurs where the operating channel shows as '0' on any Radio in FortiAP G and K series Access Points. The issue is mainly seen in new deployments. |
| Scope | FortiAP G/K series. |
| Solution | In a scenario where the operating channel shows as '0' in G and K series access point, the radio configuration on the AP is as follows:
rcfg Radio 0: AP channel : num=0 oper_chan : 0 r_ac md_cap : 1, 6, 11, r_ac chan list : 1, 6, 11, chan list : 1, 6, 11,
Radio 1: AP channel : num=0 oper_chan : 0 chan list : 36, 40, 44, 48, 149, 153, 157, 161, 165, hw_chan list : 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 149, 153, 157, 161, 165,
This issue is seen when low power is provided to the AP. As a result, the PoE status shows as low. This can be checked by executing the following commands on the FortiAP CLI:
fap-get-status cw_diag power
If the result is as follows...
poe mode : low(auto) poe mode oper : low usb port : disabled
... All radio interfaces must be disabled for 802.3af power. The access point needs to be provided with one or two 802.3at, or one 802.3bt power to enable all radio interfaces.
A relevant snippet from the datasheet for FortiAP 431G/433G:
PoE Mode 802.3af : Low – All Radios Disabled ;USB – Disabled 802.3at : High – Tx Power Full;Chain 2x2; USB – Disabled 802.3bt / DC : Full – Tx Power Full ; Chain 4x4;USB – Enabled
On a fully powered access point, POE mode looks like the following:
High:
poe mode : high(auto) poe mode oper : high
Full:
poe mode : full(auto) poe mode oper : full
Relevant articles: Technical Tip: Unable to bring up all 3 radio interface for AP433. |