3Com S7906E Configuration Manual page 382

Configure local proxy ARP on Switch A to implement Layer 3 communication between VLAN 2 and
VLAN 3.
Figure 2-6 Network diagram for local proxy ARP configuration in isolate-user-VLAN
Configuration procedure
1) Configure Switch B
# Create VLAN 2, VLAN 3, and VLAN 5 on Switch B. Add GigabitEthernet2/03 to VLAN 2,
GigabitEthernet2/01 to VLAN 3, and GigabitEthernet2/02 to VLAN 5. Configure VLAN 5 as the
isolate-user-VLAN, and VLAN 2 and VLAN 3 as secondary VLANs. Configure the mappings between
isolate-user-VLAN and the secondary VLANs.
<SwitchB> system-view
[SwitchB] vlan 2
[SwitchB-vlan2] port GigabitEthernet2/03
[SwitchB-vlan2] quit
[SwitchB] vlan 3
[SwitchB-vlan3] port GigabitEthernet2/01
[SwitchB-vlan3] quit
[SwitchB] vlan 5
[SwitchB-vlan5] port GigabitEthernet2/02
[SwitchB-vlan5] isolate-user-vlan enable
[SwitchB-vlan5] quit
[SwitchB] isolate-user-vlan 5 secondary 2 3
2) Configure Switch A
# Create VLAN 5 and add GigabitEthernet2/0/2 to it.
<SwtichA> system-view
[SwtichA] vlan 5
[SwtichA-vlan5] port GigabitEthernet2/02
[SwtichA-vlan5] interface vlan-interface 5
[SwtichA-Vlan-interface5] ip address 192.168.10.100 255.255.0.0
The ping operation from Host A to Host B is unsuccessful because they are isolated at Layer 2 and
Layer 3.
# Configure local proxy ARP to implement communication between VLAN 2 and VLAN 3.
2-7