We are experiencing client instability and intermittent disconnections in a small wireless network using two XV2-21X access points managed through cnMaestro.
Both APs are connected to a switch, and the switch uplinks to an ONT which handles NAT and DHCP (PPPoE bridge).
Each AP provides two WLANs (“Alumnos” and “Docentes”) with the same configuration on both devices, allowing seamless coverage across the building.
After enabling Enhanced Roaming with “active disconnection” and an SNR threshold of 15 dB, several users reported that devices keep connecting and disconnecting.
In the WiFi event logs we frequently see:
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WIFI_CLIENT_CONNECTION_FAILED-
“Client connection failed due to enhanced roaming feature”
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“Client authentication ignored due to band-steering feature”
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“The client did not initiate the DHCP handshake”
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WIFI_CLIENT_DISCONNECTED
We have temporarily disabled roaming and created separate WLANs and AP Groups per AP to keep the service stable, but this is not our desired final configuration.
Current configuration summary:
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Model: XV2-21X
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Firmware: 6.6.2.1-r5
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APs: 2 units, both connected to the same switch → ONT (NAT/DHCP)
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WLANs: 2 SSIDs (“Alumnos”, “Docentes”)
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Features enabled before issues:
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Enhanced Roaming (threshold 12 dB)
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Bands: 2.4 GHz and 5 GHz
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Fast Roaming Protocol enabled
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802.11r and 802.11v enabled
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Reassociation timeout: 20 s
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Band steering enabled: Normal
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Request:
Could you please help us determine:
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The recommended configuration for roaming between two XV2-21X APs in this topology?
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Whether the Enhanced Roaming feature should be used in combination with 802.11k/v, and what SNR threshold is advised?
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If these logs may be related to DHCP delay when the ONT is acting as NAT/DHCP server.
Thank you in advance for your support.