RUCKUS ICX devices reserve five specific VLAN IDs for system-level functions, making them unavailable for standard static VLAN configuration. These reserved VLANs are essential for advanced Layer 2 features. The reserved IDs are:

4091: Port-based VLANs

4092: Protocol-based VLANs

4093: IP-subnet-based VLANs

4094: MAC-based VLANs

4095: Reserved for system use (often for discarding frames)

This reservation ensures that these specialized VLAN functions operate without conflicting with user-configured VLANs.

A. 9: This is an incorrect count. The official documentation explicitly lists only five reserved VLAN IDs.

B. 7: This is an incorrect count and does not align with the number of VLANs reserved for system functions.

C. 3: This count is too low and omits some of the VLANs reserved for features like MAC-based or Port-based VLANs.

1. RUCKUS FastIron Layer 2 Switching Configuration Guide, 08.0.95

Reference: Chapter 1: Configuring VLANs, Section: "VLANs", Page 3.

Quote: "The following VLAN IDs are reserved for system use and cannot be used to create static VLANs: 4091, 4092, 4093, 4094, and 4095."

2. RUCKUS Campus Fabric Configuration Guide, 08.0.90

Reference: Chapter 2: Configuring VLANs, Section: "VLAN Overview", Page 21.

Quote: "VLANs 4091 through 4095 are reserved for internal use and cannot be configured." This statement corroborates the reservation of five specific VLAN IDs.