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Super VLAN-Super VLAN technology

Super VLAN-Super VLAN technology

In the early years of the enterprise, the IP network segment was configured as a large segment, but now it does not want to change the IP network segment but wants to divide VLANs, what should I do?

This kind of problem needs super vlan to help!

The concept of Super VLAN Super VLAN (Super VLAN), its principle is that a Super VLAN contains multiple Sub VLANs, each Sub VLAN is a broadcast domain, and the two layers of different Sub VLANs are isolated from each other. Layer 3 interfaces can be configured for super VLANs, but layer 3 interfaces cannot be configured for sub VLANs. When users in the Sub VLAN need to communicate at Layer 3, the IP address of the Layer 3 interface of the Super VLAN is used as the gateway address, so that multiple Sub VLANs share one IP network segment, thereby saving IP address resources.

sw1:

interface GigabitEthernet0/0/1

port link-type access

port default vlan 10

#

interface GigabitEthernet0/0/2

port link-type access

port default vlan 10

#

interface GigabitEthernet0/0/3

port link-type access

port default vlan 20

#

interface GigabitEthernet0/0/4

port link-type access

port default vlan 20

#

interface GigabitEthernet0/0/5

port link-type trunk

port trunk allow-pass vlan 10 20

sw2:

vlan batch 10 20 30

interfaceVlanif30

ip address 192.168.1.1 255.255.255.0

interface GigabitEthernet0/0/1

port link-type trunk

port trunk allow-pass vlan 10 20

vlan 30 aggregation vlan parent vlan

aggregate-vlan

access-vlan 10 20 sub-vlan

int vlanif 30

arp-proxy inter-sub-vlan-proxy enable

 

Note 1: It is not allowed to access the physical interface to the aggregation vlan, and the trunk interface does not allow the aggregation vlan to pass through. Aggregated vlan 30 is just a logical vlan.

 

Note 2: If you want to allow unicast communication between vlans, you need to enable the arp proxy function on sw2.

 

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