3Com S7906E - Switch, Configuration Manual

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Super VLAN Configuration
When configuring super VLAN, go to these sections for information you are interested in:
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Overview
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Configuring a Super VLAN
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Displaying and Maintaining Super VLAN
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Super VLAN Configuration Example
Overview
Super VLAN, also called VLAN aggregation, was introduced to save the 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 cannot assign a physical port to a super VLAN, however, you can assign a physical
port to a sub-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, you should configure the VLAN interface IP
address of the associated super VLAN as the gateway IP address. This enables multiple sub-VLANs to
share the same gateway address and thus saves IP address resources.
After creating a super VLAN and the VLAN interface, enable local proxy Address Resolution Protocol
(ARP) on the device. The super VLAN can use local proxy ARP to forward and process ARP requests
and responses and thus achieve Layer 3 communication between sub-VLANs and between sub-VLANs
and other networks.
Configuring a Super VLAN
Follow these steps to configure a super VLAN:
To do… Use the command… Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id
Required
If the specified VLAN does not
exist, this command creates the
VLAN first.
Configure the VLAN as a super
VLAN
supervlan Required
Associate the super VLAN with
the specified sub-VLAN(s)
subvlan vlan-list Required
Exit the VLAN view quit —