H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – Extended VLAN Application
H3C S7500 Series Ethernet Switches Chapter 3
Super VLAN
3-1
Chapter 3 Super VLAN
When configuring super VLAN, go to these sections for information you are interested
in:
z Super VLAN Overview
z Super VLAN Configuration
z Displaying Super VLAN
z Super VLAN Configuration Examples
 Note:
Only Salience III series engines support the super VLAN.
3.1 Super VLAN Overview
To save IP address resources, the super VLAN concept (also known as VLAN
aggregation) was developed. Its principle is like this: a super VLAN may include
multiple sub VLANs, with each as a broadcast domain. Layer 2 isolation is implemented
between sub VLANs. The super VLAN, but not the sub VLAN, can be configured with a
Layer 3 interface,.
When users in different sub VLANs want to communicate, they use the IP address of
the Layer 3 interface of the super VLAN as their gateway address. IP address
resources 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 VLANs
and between the sub VLAN and other networks, proxy ARP is used. Proxy ARP
enables Layer 3 connectivity between Layer 2 isolated ports by sending ARP request
and processing response packets.
3.2 Super VLAN Configuration
3.2.1 Super VLAN Configuration Task List
Complete the following tasks to configure super VLAN:
Task Remarks
Configuring a Super VLAN Required
Configuring a Sub VLAN Required