Raspberry disconnect from an AP to go to another

[Ingénierie RCI]

Hi,

We have concerns about the use of an SSID dedicated to production, on which are Raspberry pi connected in 2. 4GHz.
Users use Raspberry pi to connect to remote desktops, and the slightest disconnection cuts off the session, which sometimes happens every 5 minutes.
The Raspberry are fixed but pass from one terminal to another for no reason.

Do you have an idea to resolve this problem?

We tried to fix the channels to the terminals without success.
The controller is a C9800-CL in version 17.9.4 and the terminals where the problem appared are 9120AXE-E and AIR-CAP2702I-E-K9.
Connection to the dedicated SSID is made via a PSK key.

I remain available to discuss and share certain configuration information with you.
I thank you in advance for any help you can provide.

Regards

Jeff

[Ingénierie RCI]

Hi,

We have concerns about the use of an SSID dedicated to production, on which are Raspberry pi connected in 2. 4GHz.
Users use Raspberry pi to connect to remote desktops, and the slightest disconnection cuts off the session, which sometimes happens every 5 minutes.
The Raspberry are fixed but pass from one terminal to another for no reason.

Do you have an idea to resolve this problem?

We tried to fix the channels to the terminals without success.
The controller is a C9800-CL in version 17.9.4 and the terminals where the problem appared are 9120AXE-E and AIR-CAP2702I-E-K9.
Connection to the dedicated SSID is made via a PSK key.

I remain available to discuss and share certain configuration information with you.
I thank you in advance for any help you can provide.

Regards

Jeff

[balaji.bandi]

Client roam between AP to AP - its all depends on signal availability and client choose which AP to connect.

Make sure you postion the Pi correctly - and updated the Drivers where possible to latest to fix the issue.

Also suggest to move from 2.4 to 5GH is best option - so stablity of the connection improves.

Connection to the dedicated SSID is made via a PSK key.

personally you do not need dedicated SSID for this requirement, if you want to you can do (but that is not required) - always suggest to have less SSID for better outcome.

[Leo Laohoo]

---

@Ingénierie RCI wrote:

Users use Raspberry pi to connect to remote desktops, and the slightest disconnection cuts off the session, which sometimes happens every 5 minutes.

---

Post the complete output to the following commands: 

sh wireless client mac <rPI MAC ADDRESS> detail

Find the nearest AP to the rPi and then provide the output to the following commands: 

sh ap name <AP NAME> dot11 24 cleanair air-quality
sh ap name <AP NAME> dot11 24 cleanair device
sh ap dot11 24 cleanair device type all | include <AP NAME>

[Leo Laohoo]

Users use Raspberry pi to connect to remote desktops, and the slightest disconnection cuts off the session, which sometimes happens every 5 minutes.

[JPavonM]

TRy to avoid having APs from different standards mixed in the same building/area, as that may lead to disconnections.

Also try to avoid having a production SSID  in both bands if ALL devices do support 5 GHz.

[Rich R]

Following on from BB's answer: "Client roam between AP to AP - its all depends on signal availability and client choose which AP to connect."

If you have AP power level set too high you might have excessive overlap of the AP cell so that client sees both/multiple APs at similar high power levels.  In that case you need to check your RRM settings to make sure power levels are set appropriately to provide the right coverage without excessive overlap.
https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-9/config-guide/b_wl_17_9_cg/m_rrm_c9800.html

[Ingénierie RCI]

Hi,

Thank you for all your answers.

I asked my client to switch the Rapsberry 3 to 5GHz, unfortunately they are models A that do not support it.

So I turned off 5GHz on this SSID.

Here are the results of the specified commands.
The impacted tested equipment is located between AP 147 and 149 :

#sh wireless client mac b827.ebf3.fe51 detail

Client MAC Address : b827.ebf3.fe51
Client MAC Type : Universally Administered Address
Client DUID: NA
Client IPv4 Address : 192.168.151.153
Client IPv6 Addresses : fe80::c5e5:713a:b400:fef7
Client Username: N/A
AP MAC Address : 6cd6.e36c.7ec0
AP Name: WIFIBAC147
AP slot : 0
Client State : Associated
Policy Profile : PolicyVLAN_151
Flex Profile : Manufacture
Wireless LAN Id: 7
WLAN Profile Name: Wi-Fi_Prod
Wireless LAN Network Name (SSID): BACCARAT_Prod
BSSID : 6cd6.e36c.7ec0
Connected For : 1027 seconds
Protocol : 802.11n - 2.4 GHz
Channel : 1
Client IIF-ID : 0xa000012a
Association Id : 1
Authentication Algorithm : Open System
Idle state timeout : N/A
Session Timeout : 1800 sec (Remaining time: 774 sec)
Session Warning Time : Timer not running
Input Policy Name : None
Input Policy State : None
Input Policy Source : None
Output Policy Name : None
Output Policy State : None
Output Policy Source : None
WMM Support : Enabled
U-APSD Support : Disabled
Fastlane Support : Disabled
Client Active State : Active
Power Save : ON
Current Rate : m7
Supported Rates : 12.0,18.0,24.0,36.0,48.0,54.0
AAA QoS Rate Limit Parameters:
QoS Average Data Rate Upstream : 0 (kbps)
QoS Realtime Average Data Rate Upstream : 0 (kbps)
QoS Burst Data Rate Upstream : 0 (kbps)
QoS Realtime Burst Data Rate Upstream : 0 (kbps)
QoS Average Data Rate Downstream : 0 (kbps)
QoS Realtime Average Data Rate Downstream : 0 (kbps)
QoS Burst Data Rate Downstream : 0 (kbps)
QoS Realtime Burst Data Rate Downstream : 0 (kbps)
Mobility:
Move Count : 0
Mobility Role : Local
Mobility Roam Type : None
Mobility Complete Timestamp : 02/19/2024 09:11:49 CET
Client Join Time:
Join Time Of Client : 02/19/2024 09:11:49 CET
Client State Servers : None
Client ACLs : None
Policy Manager State: Run
Last Policy Manager State : IP Learn Complete
Client Entry Create Time : 1027 seconds
Policy Type : WPA2
Encryption Cipher : CCMP (AES)
Authentication Key Management : PSK
AAA override passphrase : No
Transition Disable Bitmap : None
User Defined (Private) Network : Disabled
User Defined (Private) Network Drop Unicast : Disabled
Encrypted Traffic Analytics : No
Protected Management Frame - 802.11w : No
EAP Type : Not Applicable
VLAN Override after Webauth : No
VLAN : 151
Multicast VLAN : 0
WiFi Direct Capabilities:
WiFi Direct Capable : No
Central NAT : DISABLED
Session Manager:
Point of Attachment : capwap_9000012c
IIF ID : 0x9000012C
Authorized : TRUE
Session timeout : 1800
Common Session ID: 790A10AC0022A429C06BD78E
Acct Session ID : 0x00000000
Auth Method Status List
Method : None
Local Policies:
Service Template : wlan_svc_PolicyVLAN_151 (priority 254)
VLAN : 151
Absolute-Timer : 1800
Server Policies:
Resultant Policies:
VLAN : 151
Absolute-Timer : 1800
DNS Snooped IPv4 Addresses : None
DNS Snooped IPv6 Addresses : None
Client Capabilities
CF Pollable : Not implemented
CF Poll Request : Not implemented
Short Preamble : Not implemented
PBCC : Not implemented
Channel Agility : Not implemented
Listen Interval : 0
Fast BSS Transition Details :
Reassociation Timeout : 20
11v BSS Transition : Not implemented
11v DMS Capable : No
QoS Map Capable : No
FlexConnect Data Switching : Local
FlexConnect Dhcp Status : Local
FlexConnect Authentication : Central
Client Statistics:
Number of Bytes Received from Client : 32471
Number of Bytes Sent to Client : 437488
Number of Packets Received from Client : 314
Number of Packets Sent to Client : 370
Number of Policy Errors : 0
Radio Signal Strength Indicator : -62 dBm
Signal to Noise Ratio : 34 dB
Fabric status : Disabled
Radio Measurement Enabled Capabilities
Capabilities: None
Client Scan Report Time : Timer not running
Client Scan Reports
Assisted Roaming Neighbor List
Neighbor : 1484.73a7.0960
Neighbor : 6cd6.e36a.fa40
Neighbor : 6cd6.e313.d8a0
Neighbor : 6cd6.e36c.61c0
Neighbor : 6cd6.e36a.9700
Neighbor : 6cd6.e36b.2220
Neighbor : 6cd6.e315.d320
Neighbor : 1484.73ad.1e40
Nearby AP Statistics:
EoGRE : Pending Classification
Max Client Protocol Capability: 802.11n
WiFi to Cellular Steering : Not implemented
Cellular Capability : N/A
Advanced Scheduling Requests Details:
Apple Specific Requests(ASR) Capabilities/Statistics:
Regular ASR support: DISABLED

#sh ap name WIFIBAC147 dot11 24 cleanair air-quality
AQ = Air Quality

AP Name Channel Avg AQ Min AQ Interferers Spectrum AP Type
------------------------------------------------------------------------------
WIFIBAC147 1 98 97 0 CA
WIFIBAC147 2 96 95 0 CA
WIFIBAC147 3 95 92 0 CA
WIFIBAC147 4 95 91 0 CA
WIFIBAC147 5 95 90 0 CA
WIFIBAC147 6 98 98 0 CA
WIFIBAC147 7 96 93 1 CA
WIFIBAC147 8 96 94 1 CA
WIFIBAC147 9 96 94 1 CA
WIFIBAC147 10 98 95 1 CA
WIFIBAC147 11 99 99 0 CA
WIFIBAC147 12 98 96 1 CA
WIFIBAC147 13 96 94 1 CA

#sh ap name WIFIBAC147 dot11 24 cleanair device
No CleanAir Interferers found for the AP

#sh ap dot11 24 cleanair device type all | include WIFIBAC147
No indications gave by the controller

#sh ap name WIFIBAC149 dot11 24 cleanair air-quality
AQ = Air Quality

AP Name Channel Avg AQ Min AQ Interferers Spectrum AP Type
------------------------------------------------------------------------------
WIFIBAC149 1 97 97 2 CA
WIFIBAC149 2 95 93 2 CA
WIFIBAC149 3 93 91 2 CA
WIFIBAC149 4 92 88 2 CA
WIFIBAC149 5 94 90 1 CA
WIFIBAC149 6 98 96 2 CA
WIFIBAC149 7 95 91 2 CA
WIFIBAC149 8 94 91 2 CA
WIFIBAC149 9 94 90 2 CA
WIFIBAC149 10 97 95 2 CA
WIFIBAC149 11 98 97 2 CA
WIFIBAC149 12 97 95 2 CA
WIFIBAC149 13 96 94 2 CA

#sh ap name WIFIBAC149 dot11 24 cleanair device

DC = Duty Cycle (%)
ISI = Interference Severity Index (1-Low Interference, 100-High Interference)
RSSI = Received Signal Strength Index (dBm)
DevID = Device ID
PD = Persistent Device

ClusterID MAC Address DevID Type PD AP Name Version ISI RSSI DC Last Update Time Channel
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
e800.000b.984a 73a7.0960.9d34 0x9d34 BT Link No WIFIBAC149 CA 2 -91 1 02/19/2024 09:49:05 CET 1,2,3,4,5,6,7,8,9,10,11,13
e800.000a.f7e4 73a7.0960.9d38 0x9d38 BT Discovery No WIFIBAC149 CA -- -90 1 02/19/2024 09:49:05 CET
e800.000b.9b8a 73a7.0960.9d39 0x9d39 BT Link No WIFIBAC149 CA -- -89 1 02/19/2024 09:49:05 CET
e800.000b.9bc9 73a7.0960.9d3b 0x9d3b BT Link No WIFIBAC149 CA -- -91 1 02/19/2024 09:49:05 CET
e800.000b.9bc9 73a7.0960.9d3c 0x9d3c BT Link No WIFIBAC149 CA -- -95 1 02/19/2024 09:49:02 CET

#sh ap dot11 24 cleanair device type all | include WIFIBAC149
e800.000b.984a 73a7.0960.9d34 0x9d34 BT Link No WIFIBAC149 CA 2 -91 1 02/19/2024 09:49:05 CET 1,2,3,4,5,6,7,8,9,10,11,13
e800.000a.f7e4 73a7.0960.9d38 0x9d38 BT Discovery No WIFIBAC149 CA -- -90 1 02/19/2024 09:49:05 CET
e800.000b.9bd5 73a7.0960.9d3f 0x9d3f BT Link No WIFIBAC149 CA

I will check the power levels parameters.
Thanks you for your help.

Regards.