3Com S7902E, Configuration Manual

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2-4
Configuration procedure
# Create VLAN 2.
<Switch> system-view
[Switch] vlan 2
[Switch-vlan2] quit
# Specify the IP address of interface VLAN-interface 1.
[Switch] interface vlan-interface 1
[Switch-Vlan-interface1] ip address 192.168.10.99 255.255.255.0
# Enable proxy ARP on interface VLAN-interface 1.
[Switch-Vlan-interface1] proxy-arp enable
[Switch-Vlan-interface1] quit
# Specify the IP address of interface VLAN-interface 2.
[Switch] interface vlan-interface 2
[Switch-Vlan-interface2] ip address 192.168.20.99 255.255.255.0
# Enable proxy ARP on interface VLAN-interface 2.
[Switch-Vlan-interface2] proxy-arp enable
After completing preceding configurations, use the ping command to verify the connectivity between
Host A and Host D.
Local Proxy ARP Configuration Example in Case of Port Isolation
Network requirements
As shown in Figure 2-4 , Host A and Host B belong to the same VLAN, and connect to Switch B via
GigabitEthernet2/0/1 and GigabitEthernet2/0/3 respectively. Switch B connects to Switch A via
GigabitEthernet2/0/2.
Configure Layer 2 and Layer 3 port isolation on GigabitEthernet2/0/1 and GigabitEthernet2/0/3 of
Switch B. Enable proxy ARP on Switch A to allow communication between Host A and Host B.
Figure 2-4 Network diagram for local proxy ARP between isolated ports
GE2/0/2
VLAN 2
Vlan-int2
192.168.10.100/16
Switch B
GE2/0/3
GE2/0/1
GE2/0/2
Host A
192.168.10.99/16
Host B
192.168.10.200/16
VLAN 2
port-isolate group
Switch A