3-5# Configure an IP address of VLAN-interface 2. system-view[SwitchA] vlan 2[SwitchA-vlan2] port gigabitethernet 1/0/2[SwitchA-vlan2] quit[SwitchA] interface vlan-interface 2[SwitchA-Vlan-interface2] ip address 192.168.10.100 255.255.0.0The ping operation from Host A to Host B is unsuccessful because they are isolated at Layer 2.# Configure local proxy ARP to let Host A and Host B communicate at Layer 3.[SwitchA-Vlan-interface2] local-proxy-arp enable[SwitchA-Vlan-interface2] quitThe ping operation from Host A to Host B is successful after the configuration.Local Proxy ARP Configuration Example in Isolate-user-vlanNetwork requirementsz Switch A is attached to Switch B through GigabitEthernet 1/0/1.z VLAN 5 on Switch B is an isolate-user-vlan, which includes uplink port GigabitEthernet 1/0/1 andtwo secondary VLANs (VLAN 2 and VLAN 3). GigabitEthernet 1/0/2 belongs to VLAN 2, andGigabitEthernet 1/0/3 belongs to VLAN 3.z Configure local proxy ARP on Switch A to implement Layer 3 communication between VLAN 2and VLAN 3.Figure 3-5 Network diagram for local proxy ARP configuration in isolate-user-vlanSwitch ASwitch BHost A192.168.10.99/16Host B192.168.10.200/16GE1/0/2VLAN 2GE1/0/3VLAN 3GE1/0/1VLAN 5Vlan-int5192.168.10.100/16GE1/0/1VLAN 5Isolate-uer-vlan 5Secondary VLAN 2 3Configuration procedure1) Configure Switch B# Create VLAN 2, VLAN 3, and VLAN 5 on Switch B. Add GigabitEthernet 1/0/2 to VLAN 2,GigabitEthernet 1/0/3 to VLAN 3, and GigabitEthernet 1/0/1 to VLAN 5. Configure VLAN 5 as theisolate-user-vlan, and VLAN 2 and VLAN 3 as secondary VLANs. Configure the mappings betweenisolate-user-vlan and the secondary VLANs. system-view[SwitchB] vlan 2
