Operation Manual – Extended VLAN ApplicationH3C S7500 Series Ethernet Switches Chapter 3 Super VLAN3-1Chapter 3 Super VLANWhen configuring super VLAN, go to these sections for information you are interestedin:z Super VLAN Overviewz Super VLAN Configurationz Displaying Super VLANz Super VLAN Configuration ExamplesNote:Only Salience III series engines support the super VLAN.3.1 Super VLAN OverviewTo save IP address resources, the super VLAN concept (also known as VLANaggregation) was developed. Its principle is like this: a super VLAN may includemultiple sub VLANs, with each as a broadcast domain. Layer 2 isolation is implementedbetween sub VLANs. The super VLAN, but not the sub VLAN, can be configured with aLayer 3 interface,.When users in different sub VLANs want to communicate, they use the IP address ofthe Layer 3 interface of the super VLAN as their gateway address. IP addressresources are saved since multiple sub VLANs share one IP address.At the same time, in order to realize the Layer 3 connectivity between the sub VLANsand between the sub VLAN and other networks, proxy ARP is used. Proxy ARPenables Layer 3 connectivity between Layer 2 isolated ports by sending ARP requestand processing response packets.3.2 Super VLAN Configuration3.2.1 Super VLAN Configuration Task ListComplete the following tasks to configure super VLAN:Task RemarksConfiguring a Super VLAN RequiredConfiguring a Sub VLAN Required
