Troubleshooting Wi-Fi from true client perspective · RSSI SLA Alarms Graphs Test 2 Test 1. Data Collection Wi-Fi Driver Windows OS AirMobile Applications Collector Windows API •

1

Troubleshooting Wi-Fi from

true client perspective

Karol Krol

[email protected]

• Wi-Fi clients in constant motion

• End-users complaining about intermittent

connectivity issues

• No overview picture from clients perspective

• Difficult to locate problems

Challenge

• Wi-Fi client based QoE analysis

• Analysis from the infrastructure side

• Over-the-air protocol and spectrum analysis

Troubleshooting workflow

Wi-Fi client based QoE

Access Points

Local Gateway

Application Server

Service Owner

Maps

Disconnection Time

Advisor

Signal quality

RSSI

SLA

GraphsAlarms

Test 2

Test 1

Data Collection

Wi-Fi Driver

Windows OS

AirMobileCollectorApplications

Windows API

• The Native Wifi API

– to manage wireless

network profiles

– to manage wireless

network connections

• Date, time, host1,

ping1, host2, ping2,

ssid, bssid, local ip,

channel, signal quality,

rssi, rssi_list, lat, long,

fixWi-Fi Card

2.4 vs 5GHz

Wi-Fi network or server

Wi-Fi network or server

Sticky client

Sticky client

Sticky client

Fast moving clients

Fast moving clients

Channel 99 (??)

Channel 99 (??)

Channel 99 (??)

Channel 99 (??)

Warning 2015-09-28 07:33:08 AFD 16002 None

Closing a UDP socket with local port number 63992 in

process 1364 is taking longer than expected. The

local port number may not be available until the close

operation is completed. This happens typically due to

misbehaving network drivers. Ensure latest updates

are installed for Windows and any third-party

networking software including NIC drivers, firewalls, or

other security products.

Bad decisions…

Bad decisions…

Bad decisions…

So how are the clients doing?

APs coverage