H3C Technologies H3C WX5500E Series Access Controllers - Manual (Page 144)

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Configuring super VLANs
Super VLAN, also called VLAN aggregation, was introduced to save IP address space.
A super VLAN is associated with multiple sub-VLANs. You can create a VLAN interface for a super VLAN
and assign an IP address for the VLAN interface. However, you cannot create a VLAN interface for a
sub-VLAN. You can assign a physical port to a sub-VLAN, but not to a super VLAN. All ports of a
sub-VLAN use the VLAN interface IP address of the associated super VLAN. Packets cannot be
forwarded between sub-VLANs at Layer 2.
To enable Layer 3 communication between sub-VLANs, create a super VLAN and the VLAN interface,
and enable local proxy ARP on the VLAN interface. After the configuration, the super VLAN can forward
and process ARP requests and replies.
Configuration procedure
To configure a super VLAN, complete the following tasks:
1. Configure sub-VLANs.
2. Configure a super VLAN, and associate the super VLAN with the sub-VLANs configured earlier.
3. Configure a VLAN interface for the super VLAN. The VLAN interface enables communication
among hosts and sub-VLANs.
Configuring sub-VLANs
To configure more sub-VLANs, repeat the following steps.
To configure a sub-VLAN:
Step Command Remarks
1. Enter system view. system-view N/A
2. Create a sub-VLAN and
enter VLAN view.
vlan vlan-id
If the specified VLAN already exists, this
command enters VLAN view only.
Configuring a super VLAN
When you configure a super VLAN, follow these guidelines:
• On a port configured with dynamic MAC-based VLAN assignment, you cannot configure the VLAN
of a MAC address-to-VLAN entry as a super VLAN.
• Do not configure a VLAN as a super VLAN and a sub VLAN at the same time.
To configure a super VLAN:
Step Command Remarks
1. Enter system view. system-view N/A