Configuration guidelines
When you configure an 802.1X critical VLAN, follow these restrictions and guidelines:
Assign different IDs to the PVID and the 802.1X critical VLAN on a port.
You can configure only one 802.1X critical VLAN on a port. The 802.1X critical VLANs on different ports can be different.
You cannot specify a VLAN as both a super VLAN and an 802.1X critical VLAN. For information about super VLANs, see Layer 2—LAN Switching Configuration Guide.
Make sure you have created the VLAN to be specified as the 802.1X critical VLAN.