topic Re: Clients unable to connect to 5Ghz in Wireless

Clients unable to connect to 5Ghz

pantelis1 — Mon, 05 Jul 2021 20:12:41 GMT

Hi All

I have a 1852i in ME mode running code 8.10.151.0 . I have 350Mb line and Wireless client get 30Mb max. All 7 clients are connecting to 2.4Ghz 802.11n (20Mhz). Band Select is enabled

Even If I bring a client (iphone 11) next to the AP it still connects via 2.4Ghz (20MHz)

Can anyone suggest where to look next?

Thanks

Re: Clients unable to connect to 5Ghz

balaji.bandi — Fri, 23 Apr 2021 11:17:13 GMT

Its all how the clients connects, for testing Try to disable 2.4 and test it.

Do you have any other device other than Iphone ? PC or Laptop to test ?

Re: Clients unable to connect to 5Ghz

pantelis1 — Fri, 23 Apr 2021 11:19:18 GMT

I have allowed ony 5Ghz on the SSID and none of the clients can connect.I have an iphone, macbook pro to test from and when connecting to a different SSID (not on 1852i) they are able to get 5Ghz

Re: Clients unable to connect to 5Ghz

balaji.bandi — Fri, 23 Apr 2021 12:13:32 GMT

So is this issue only on - 1852i ? how are you managing this AP with WLC ? what you see any logs in the debug ?

Re: Clients unable to connect to 5Ghz

pantelis1 — Fri, 23 Apr 2021 12:52:31 GMT

No I am using Mobility Express (when deauth the client- I get the logs attached)

Re: Clients unable to connect to 5Ghz

pantelis1 — Sat, 24 Apr 2021 16:37:24 GMT

Just replaced the 1852i with MR33 just for testing and all clients are able to get 5Ghz and speed are much much better. Seems to be a configuration issue with 1852i

Re: Clients unable to connect to 5Ghz

Scott Fella — Sat, 24 Apr 2021 19:04:00 GMT

Well then maybe it’s something in your configuration. Have you tried an open ssid with 5ghz only to test? Make sure you are not enabling all the features also, just keep it simple and uncheck or disable the features and see if the devices see the ssid and connects.

Re: Clients unable to connect to 5Ghz

pantelis1 — Sat, 24 Apr 2021 21:13:13 GMT

Thanks Scott

when creating an open SSID with just 5Ghz radio policy, the SSID is not even broadcasted. None of the clients are able to see or manually connect to it

Re: Clients unable to connect to 5Ghz

Scott Fella — Sun, 25 Apr 2021 19:05:00 GMT

I want to make sure you have tested with an open ssid with no features enabled. Features can break things if you don’t know what that feature is or if the client may not support that feature. If you tested and the 5ghz isn’t working, then the radio is bad and nothing you can do about that.

Re: Clients unable to connect to 5Ghz

pantelis1 — Sun, 25 Apr 2021 19:52:34 GMT

It is literally just open network with just 5Ghz. I Thought it might be related to country settings but they are correct.

Re: Clients unable to connect to 5Ghz

Scott Fella — Sun, 25 Apr 2021 21:37:00 GMT

If your country code is correct and matches the country code identified on the ap itself, then there is nothing else you can do. Post your show wlan so we can verify you don’t have any features enabled.

Re: Clients unable to connect to 5Ghz

pantelis1 — Mon, 26 Apr 2021 08:26:17 GMT

attached

Re: Clients unable to connect to 5Ghz

Scott Fella — Tue, 27 Apr 2021 05:06:50 GMT

Okay, so your wlan is configured for FlexConnect local switching which means that you need a FlexConnect Group with the wlan to vlan mapping. You should test this with FlexConnect disabled and see if the SSID is being broadcasted. Since you have it in FlexConnect, if you don’t define the FlexConnect group, the AP will not broadcast the ssid.

Re: Clients unable to connect to 5Ghz

pantelis1 — Tue, 27 Apr 2021 07:13:03 GMT

Thanks Scott, If i disable the flexconnect, 5GHz is broadcasted. However, I need to be able to do wlan vlan tagging (each wlan gets the IP via DHCP which is configured on my ASA)

Example below of my Mobility express config

FlexConnect Vlan mode :.......................... Enabled

--More-- or (q)uit

Native ID :..................................... 1

WLAN 1 :........................................ 1 (Wlan-Specific)

WLAN 3 :........................................ 30 (Group-Specific)

FlexConnect VLAN ACL Mappings

FlexConnect Group................................ default-flexgroup

show flexconnect group detail default-flexgroup

Number of AP's in Group: 1

AP Ethernet MAC Name Status Mode Type Conflict with PnP
-------------------- -------------------- --------------- -------------- ---------- ------------------

80:e8::xxxxx ap Joined Flexconnect Manual No

Re: Clients unable to connect to 5Ghz

pantelis1 — Fri, 30 Apr 2021 23:53:00 GMT

Deleting the existing SSID configurations and recreating the different wlan profiles, did the trick. Clients are able to connect to 5Ghz

Re: Clients unable to connect to 5Ghz

Scott Fella — Sat, 01 May 2021 14:06:30 GMT

Well glad you figured it out. Typically that is the second thing I do automatically when running into a wlan issue. I have done this with AireOS and IOS. I always assume folks have tried this, just like rebooting your laptop. Just keep that info handy for next time.