156Configuring super VLANsSuper VLAN, also called "VLAN aggregation," was introduced to save IP address space. A super VLANis associated with multiple sub VLANs. These sub VLANs use the VLAN interface of the super VLAN (alsoknown as a super VLAN interface) as the gateway for Layer 3 communication. Sub VLANs are isolatedat Layer 2.You can create a VLAN interface for a super VLAN and assign an IP address to the VLAN interface.However, you cannot create a VLAN interface for a sub VLAN. You can assign a physical port to a subVLAN, but you cannot assign a physical port to a super VLAN.You can enable Layer 3 communication between sub VLANs by performing the following tasks:1. Create a super VLAN and the VLAN interface.2. Enable local proxy ARP or ND on the super VLAN interface as follows:{ In an IPv4 network, enable local proxy ARP on the super VLAN interface. The super VLAN canthen forward and process ARP requests and replies.{ In an IPv6 network, enable local proxy ND on the super VLAN interface. The super VLAN canthen forward and process the NS and NA messages.Super VLAN configuration task listTasks at a glance(Required.) Creating a sub VLAN(Required.) Configuring a super VLAN(Required.) Configuring a super VLAN interfaceCreating a sub VLANStep Command Remarks1. Enter system view. system-view N/A2. Create a sub VLAN. vlan vlan-id By default, only the system default VLAN (VLAN 1)exists.Configuring a super VLANWhen you configure a super VLAN, follow these restrictions and guidelines:• Do not configure a VLAN as a super VLAN and a sub VLAN at the same time.• You can configure Layer 2 multicast for a super VLAN. However, the configuration does not takeeffect.To configure a super VLAN:
