3com 8807 User Guide

Super VLAN is also called VLAN aggregation. The following is the fundamental 
principle: A super VLAN contains multiple sub VLANs. A super VLAN can be 
configured with an IP address of the virtual port, while a sub VLAN cannot be 
configured with the IP address of the virtual port. Each sub VLAN is a broadcast 
domain. Different sub VLANs are isolated at Layer 2. When users in a sub VLAN 
need to communicate with each other, they use the IP address of the virtual 
interface of the super VLAN as the IP address of the gateway. The IP address is 
shared by multiple VLANs. Therefore IP addresses are saved. If different sub VLANs 
want to communicate with one another at Layer 3, or a sub VLAN communicates 
with other networks, you can enable ARP proxy. The address resolution protocol 
(ARP) proxy can forward and process ARP request and response packets so that 
the isolated sub VLANs can communicate with each other at Layer 3. By default, 
ARP proxy is disabled in a sub VLAN.

Super VLAN configuration includes:

■

Configure a VLAN to be a super VLAN

■

Configure sub VLANs

■

Establish mappings between the super VLAN and the sub VLANs

■

Enable ARP proxy for the sub VLANs

n 

■

You can configure multiple super VLANs for a switch. The configured VLAN 
port and IP address configurations are the same as common VLAN 
configurations.

■

A sub VLAN configuration is the same as a common VLAN configuration. The 
following table describes the specific commands to configure a sub VLAN. For 
detailed information, refer to  “VLAN Configuration”.

You can configure a super VLAN as follows:

Table 46   Configure a super VLAN

Enter system view 

system-view 

- 

Enter VLAN view 

vlan vlan-id 

Required