3Com 7757 Configuration Manual page 587

Enable proxy ARP on Switch A to allow Host A (in VLAN 2) and Host B (in VLAN
■
3) to communicate with each other through ARP.
Network diagram
Figure 151 Network diagram for proxy ARP configuration in isolate-user-vlan
192 .168.0.100/16
Eth2 /0/2
VLAN 2
Host A
192.168.10.99/16
Configuration procedure
1 Configure Switch B
# Create VLAN 2, VLAN 3, and VLAN 5 on Switch B. Add Ethernet 2/0/2 to VLAN
2, Ethernet 2/0/3 to VLAN 3, and Ethernet 2/0/1 to VLAN 5. Configure VLAN 5 as
the isolate-user-vlan, and VLAN 2 and VLAN 3 as secondary VLANs. Configure the
secondary VLANs to belong the isolate-user-vlan.
<SwitchB> system-view
[SwitchB] vlan 2
[SwitchB-vlan2] port ethernet 2/0/2
[SwitchB-vlan2] quit
[SwitchB] vlan 3
[SwitchB-vlan3] port ethernet 2/0/3
[SwitchB-vlan3] quit
[SwitchB] vlan 5
[SwitchB-vlan5] port ethernet 2/0/1
[SwitchB-vlan5] isolate-user-vlan enable
[SwitchB-vlan5] quit
[SwitchB] isolate-user-vlan 5 secondary 2 3
2 Configure Switch A
# Configure VLAN 5, and add Ethernet 2/0/1 to it.
<SwitchA> system-view
[SwitchA] vlan 5
[SwitchA-vlan5] port ethernet 2/0/1
[SwitchA-vlan5] interface vlan-interface 5
[SwitchA-Vlan-interface5] ip address 192.168.10.100 255.255.0.0
# Enable proxy ARP and intra-VLAN ARP on VLAN-interface 5 to allow Host A and
Host B to communicate with each other through ARP.
Switch A
Eth2 /0/1
Vlan-int 5
Eth2/0/1
VLAN 5
Eth2/0/3
VLAN 3
Switch B
Proxy ARP Configuration Example
Host B
192 .168.10.200/16
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