I've been experiencing strange issue with client to client communication.
I'm preparing new WLAN proof of concept for car repair shop. They use:
- tester: diagnostic unit connected in car
- muxer: hardened tablet PC based on Microsoft Windows XP
Both devices connect to same WLAN, have assigned IP addresses from same IP subnet.
I've installed WLC2504 (sw 7.5) with 4 LAP1041 and disabled radios on all APs they're currently using.
I used same WLAN settings as they've been using so far: same SSID, WPA, encryption, PSK.
P2P blocking action: disable.
I've successfully connected with all devices - 8 different types. I've successfully connected both tester and muxer. Both devices received IP address assigned from DHCP server. I can ping tester from muxer. But I can't pair both devices together anymore.
I've connected laptop to same WLAN and ran nmap - I can't find any connectivity problem: nmap shows open tcp and udp ports on both devices. I can establish connection from laptop to SMB share on muxer for example.
But anyway: what could possible be wrong? It seems there's discovery problem. I don't know how both devices communicate exactly and I'm waiting for this information from manufacturer.
How could I troubleshoot this issue?
They've been using APs for home use so far (Asus) - and they haven't experienced this kind of issue. If I disable WLAN on Cisco and re-enable it on Asus APs, everything works perfectly again without any additional intervention.
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