Cisco APIC Layer 2 Networking Configuration Guide, Release 6.2(x)
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Cisco APIC Layer 2 Networking Configuration Guide, Release 6.2(x)
Updated: July 7, 2026
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Log inConfigure overlapping VLAN validation using the APIC GUI to prevent VLAN pool conflicts between EPGs.
This procedure provides an example of using the APIC GUI to configure overlapping VLAN validation.
Follow these steps to validate overlapping VLANs using the GUI:
On the menu bar, choose System > System Settings.
In the navigation pane, choose Fabric Wide Setting.
In the work pane, locate and check Enforce EPG VLAN Validation.
NoteIf overlapping VLAN pools already exist and this parameter is checked, the system returns an error. You must assign VLAN pools that are not overlapping to the EPGs before choosing this feature.
If this parameter is checked and an attempt is made to add an overlapping VLAN pool to an EPG, the system returns an error.
Click Submit.
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