Jtdylktuy

In local network of company I have nodes connected over cable and over Wifi. Local network is run with Netis router (installed right under the ceiling). Interestingly but nodes connected by cable run OK, but nodes connected by WiFi have poor connection. For example, node 192.168.0.40 is connected by WiFi and 192.168.0.34 is connected by cable, both are in local network:

ping 192.168.0.40



Pinging 192.168.0.40 with 32 bytes of data:

Reply from 192.168.0.40: bytes=32 time=62ms TTL=64

Reply from 192.168.0.40: bytes=32 time=131ms TTL=64

Reply from 192.168.0.40: bytes=32 time=31ms TTL=64

Reply from 192.168.0.40: bytes=32 time=130ms TTL=64



Ping statistics for 192.168.0.40:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

    Minimum = 31ms, Maximum = 131ms, Average = 88ms



ping 192.168.0.34



Pinging 192.168.0.34 with 32 bytes of data:

Reply from 192.168.0.34: bytes=32 time=4ms TTL=64

Reply from 192.168.0.34: bytes=32 time=1ms TTL=64

Reply from 192.168.0.34: bytes=32 time<1ms TTL=64

Reply from 192.168.0.34: bytes=32 time=1ms TTL=64



Ping statistics for 192.168.0.34:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

    Minimum = 0ms, Maximum = 4ms, Average = 1ms

I have used WireShark and I don't see any IP conflicts which may be hindering network.

How do I dispatch the reason of poor wifi connection?

Edit... 04.03.2019 This problem still persists (Although it was fine month ago). Some side notes:

• This is a metal processing factory with some really powerful electrical engines.




• Also workers do use wifi connection extensively (this is approved by engineer)




• Company operates two routers : One is Netis WF2419 router (192.168.0.1) with DHCP enabled (192.168.0.3 - 192.168.0.254), another is TPLink WR841N router (192.168.0.3) with DHCP disabled and connected to LAN port of Netis router. Protection for 192.168.0.1 is WPA/WPA2-PSK and encryption is TKIP&AES. Protection for 192.168.0.2 is WPA/WPA2 Personal, version WPA2-PSK and encryption is set to Automatic.




• I have came 15 minutes before the start of working day, and it was working nice, but then workers started to arrive, bringing their phones with them and launching machinery. And things have gone wrong...




• Channels are not overlapped (I am using inssider with some wifi adapter. (Wireshark does not work with wifi) ):

If this is a problem with machine, leaking strong magnetic field - I cannot do a thing. And there is no way to prove such assumption to engineer.

If this is a problem with user's phone, how do I find out which one is causing trouble (and block its MAC on router) without banning "innocent" users?

Depending on your goal this could be hard. The reason for slowness could be any one or more of the following:

• Bad radio / badly designed antenna


• Congestion from other networks on same/overlapping frequencies


• Interference from other non-wifi devices (eg microwaves, baby monitors, electric motors)


• Distance from base station


• Using old standards


• Bad firmware.


• Other WIFI users

None of these will be apparent using wireshark, but making changes to mitigate each of the above and looking at the SNR values reported by your device can help.