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Missing VLANs

ExtremeCloud‌ IQ detects VLANs that are configured on the APs, but missing on the upstream switch, even if the upstream switch is not managed. All AP3XXX and AP5XXX models support this feature.

To trigger a Missing VLANs anomaly, clients must attempt to connect to the SSID.

Sometimes VLANs are intentionally missing, for example: black hole VLANs. You can manually exclude them.
LLDP Enabled
When LLDP is enabled, the anomaly includes the following information:

  • The VLAN IDs missing on the APs

  • The name of the upstream switch
  • The switch ports the APs are connected on
  • A Go to Device link, if the switch is managed by XIQ
    Missing VLAN anomaly with LLDP enabled
LLDP Disabled
When LLDP is disabled, the anomaly includes the following information:

  • The VLAN IDs missing on the APs

  • The name of the upstream switch approximated from the floor name

Missing VLAN anomaly with LLDP disabled

Copyright © 2026 Extreme Networks. All rights reserved. Published February 17, 2026.