VLAN aggregation is configured on a switched network.

Understanding VLAN Aggregation (Super-VLAN and Sub-VLANs)

VLAN aggregation allows multiple sub-VLANs to be grouped under a super-VLAN, reducing the number of VLANIF interfaces required for IP address configuration.

Super-VLAN: A logical VLAN that does not forward Layer 2 traffic directly but is used for Layer 3 communication.

Sub-VLANs: VLANs that exist within the Super-VLAN but cannot communicate with each other by default.

2️⃣ Why is the " inter-sub-vlan-proxy enable " Command Needed?

By default, hosts in different sub-VLANs under the same super-VLAN cannot communicate with each other because sub-VLANs do not exchange MAC address information.

The inter-sub-vlan-proxy enable command allows Layer 3 communication between sub-VLANs under the same super-VLAN by acting as a proxy for ARP requests and replies.

This enables inter-sub-VLAN communication while still reducing the number of VLANIF interfaces required.

3️⃣ Command Syntax and Execution

The correct command should be run under the VLANIF interface of the super-VLAN:

[Switch] interface vlanif 10

[Switch-Vlanif10] inter-sub-vlan-proxy enable