9124AXE configure slot 2 radio fail

[Mitch23]

Hi Everyone,

I have a trouble with a 9124AXE mesh system.

My problem is the following: I can not set the RF Channel of slot 2 radio...

The second radio itself is working,but only with "global" assignment method.

Fun fact: If i set the same parameters in custom mode like as it set automatically, then it drops the error message again.

All the time the error message: "failed to enable radio because of 100 MHz spacing violation".

Just to clarify, backhaul settings: ch100 + 40MHz and I've tried every other channel on both 20 & 40 MHz width...

Tri band & dual radio settings are enabled. RF profiles are set (include dedicated downlink for slot 2 etc...).

My goal is to set the downlink radio to a custom channel and the 40MHz is the most important!

By automatically it use 20MHz... none of the global setting have 20 MHz, only 40 MHz...

I'm thinking about this will be a bug or IDK.
WLC: C9800-40 17.12.4

Thank you in advance!

[marce1000]

  - Have a checkup of the C9800-40 controller's configuration using the CLI command show tech wireless and
     feed the output from that into Wireless Config Analyzer
    Take note of the RF advisories too , when downloading the Excell format of the report, visit the RF tab too (e.g.)

   M.
     

[Scott Fella]

Take a closer look at how many slots that AP shows and what they are assigned to.  0 might be 2.4ghz, 1 is the main 5ghz, 2 might be the micro cell 5ghz and 3 is 6ghz.  That slot will not be used in your case for mesh/outdoor use. So my question is, what does slot 1 show and if that is your 5ghz, then that is what you need to use.

You should start off simple by getting a single 20mhz channel up before you start going to 40mhz and up.  Also avoid any DFS channels for outdoor. 

[Mitch23]

Hi! First, thank you for the reply! The C9124AXE has two independent 5 gig radio and it has Tri-radio mode. So it is capable for the following setup:

The C9124AXE in Tri-Radio mode:

• 5G Radio1 - 2TX x 2RX; 2SS for channel bandwidth <= 80MHz

• 5G Radio2 - 2TX x 2RX; 2SS for channel bandwidth <= 80MHz

• 2G Radio - 2TX x 2RX; 2SS for 20 MHz only

My main goal is to provide 5 ghz access for clients in an area, where i can't bring cable connection.

This is the config now:

Slot 0 -> 2,4GHz 20MHz access

Slot 1 -> 5GHz 40MHz backhaul for bridge communication

Slot 2 -> 5GHz access fro clients (this is the slot i can't set manually, i can leave it only in global mode, but in this case it uses 20MHz width, and yes, global mode was also set to 40MHz)

Fun fact, if the backhaul is the 2,4 GHz slot 0, then i can set 40MHz for both slot 1 & 2....
But i need the 40MHz both for backhaul and 5GHz access because of the huge amount of data usage of clients...

The old 1552 series could do better this mesh service...

As i can't find any thorough description about bridge settings with the radio part, I'm starting to realise that nowadays Cisco is not as good as the old one... It is a buggy s**t. So please, someone change my mind an tell me how to configure correctly this simple bridge system with these expensive craps

Thank youuuu