Interactive Set-Up
AX3000 Models 80 and 85 - User's Manual 33
c) Advanced Settings
Within the "Wireless Parameters" dialog box, click "Enhanced Parameters":
Forced BSSID: in event of multiple access points with the same SSID, this option allows a specific
one to be selected via its MAC address (BSSID).
Roaming: this feature is only for 'mobile' thin clients. When a thin client moves from its current
access point (and the signal quality becomes too weak), the thin client automatically disconnects its
wireless link and attempts to reconnect to the nearest access point (with the same SSID and same
security settings). This should be 'invisible' for TCP connections (telnet, RDP, ICA...).The roaming
options are:
- RSSI Threshold before Roaming: if the signal quality average is below this value the
wireless link is disconnected.
- The three new parameters are used to compute this signal quality average. For more
information see the flow chart on the next page.
- Scan all Channels: after a roaming disconnection, available access points are detected by a
scanning operation. Scanning all channels takes 3 or 4 seconds (200ms per channel). To
reduce this time and to be quickly reconnected, a subset of channels can be specified. Set
this parameter to "No" and select/unselect each channel.
Note for Windows servers: to prevent TCP disconnections (RDP or ICA) when roaming, a registry
value can be tuned:
- Parameter: HKEY_LOCAL_MACHINE-SYSTEM-CurrentControlSet-Services-Tcpip-
parameters-TcpMaxDataRetransmissions
- Default value: 5
- Advised value: 20
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