Local proxy ARP configuration example in super VLAN
Network requirements
Figure 10 shows a super VLAN, VLAN 10, with the interface IP address 192.168.10.100/16 and sub-VLANs (VLAN 2 and VLAN 3). GigabitEthernet 1/0/2 belongs to VLAN 2 and GigabitEthernet 1/0/1 belongs to VLAN 3. Host A belongs to VLAN 2 and connects to GigabitEthernet 1/0/2 of the switch. Host B belongs to VLAN 3 and connects to GigabitEthernet 1/0/1 of the switch.
As Host A and Host B belong to different Sub-VLANs, they are isolated at Layer 2. Configure local proxy ARP on the switch to allow Layer 3 communication between Host A and Host B.
Figure 10: Network diagram
Configuration procedure
# Create the super VLAN and the sub-VLANs. Add GigabitEthernet 1/0/2 to VLAN 2 and GigabitEthernet 1/0/1 to VLAN 3. Configure the IP address 192.168.10.100/16 for the interface of VLAN 10.
<Switch> system-view [Switch] vlan 2 [Switch-vlan2] port GigabitEthernet 1/0/2 [Switch-vlan2] quit [Switch] vlan 3 [Switch-vlan3] port GigabitEthernet 1/0/1 [Switch-vlan3] quit [Switch] vlan 10 [Switch-vlan10] supervlan [Switch-vlan10] subvlan 2 3 [Switch-vlan10] quit [Switch] interface vlan-interface 10 [Switch-Vlan-interface10] ip address 192.168.10.100 255.255.0.0
From Host A, ping Host B. The ping operation is unsuccessful because they are isolated at Layer 2.
# Configure local proxy ARP to implement Layer 3 communication between sub-VLANs.
[Switch-Vlan-interface10] local-proxy-arp enable
From Host A, ping Host B. The ping operation is successful after the configuration.