3Com Switch 8800 Configuration Guide Chapter 10 Super VLAN Configuration10-1Chapter 10 Super VLAN Configuration10.1 Super VLAN OverviewSuper VLAN is also called VLAN aggregation: A super VLAN contains multiple subVLANs. A super VLAN can be configured with an IP address of the virtual port, while asub VLAN cannot be configured with the IP address of the virtual port. Each sub VLANis a broadcast domain. Different sub VLANs are isolated at Layer 2. When users in asub VLAN need to communicate with each other, they use the IP address of the virtualinterface of the super VLAN as the IP address of the gateway. The IP address is sharedby multiple VLANs. Therefore IP addresses are saved. If different sub VLANs want tocommunicate with each other at Layer 3, or a sub VLAN communicates with othernetworks, you must enable ARP proxy (by default it is disabled). The address resolutionprotocol (ARP) proxy can forward and process ARP request and response packets sothat the isolated sub VLANs can communicate with each other at Layer 3.10.2 Configuring a Super VLANSuper VLAN configuration includes:z Configuring a Super VLAN10.2.1 Configuring a Super VLANNote:z You can configure multiple super VLANs for a switch. The configured VLAN portand IP address configurations are the same as common VLAN configurations.z A sub VLAN configuration is the same as a common VLAN configuration. Thefollowing table describes the specific commands to configure a sub VLAN. Fordetailed information, refer to Chapter 8 “VLAN Configuration”.z By default, ARP proxy is enabled for super VLANs and disabled on the sub VLANs.You can configure a super VLAN as follows:Table 10-1 Configure a super VLANNumber Item Command Description1 Enter systemview system-view ––
