VLAN aggregation does not support Layer 3 communication between hosts in different sub-VLANs. To enable hosts in one sub-VLAN to communicate with hosts in another sub-VLAN or on another network over Layer 3, enable proxy ARP. After a super-VLAN and its VLANIF interface are created, proxy ARP must be enabled to allow the super-VLAN to forward or process ARP Request and Reply packets.
This configuration enables hosts in all sub-VLANs of the super-VLAN to communicate with each other. If PCs in some sub-VLANs of the super-VLAN need to communicate, see How Do I Implement Communication Between Specific Sub-VLANs in a Super-VLAN.
VLAN aggregation simplifies configurations for networks where many VLANs are configured and PCs in different VLANs need to communicate with each other.