Local Proxy Arp Configuration Example In Case Of Port Isolation - 3Com MSR 50 Series Configuration Manual

Local Proxy ARP
Configuration Example
in Case of Port Isolation
n
[Router] interface ethernet 1/1
[Router-Ethernet1/1] ip address 192.168.20.99 255.255.255.0
[Router-Ethernet1/1] proxy-arp enable
[Router-Ethernet1/1] quit
Network requirements
Host A and Host B belong to the same VLAN, and are connected to Ethernet
■
1/0 and Ethernet 1/1 of the switch respectively.
The switch is connected to the router via Ethernet 1/2.
■
Ethernet 1/0 and Ethernet 1/1 isolated at Layer 2 can implement Layer 3
■
communication.
Network diagram
Figure 160 Network diagram for local proxy ARP between isolated ports
192 .168 .10 .100 /16
Eth1/0
Host A
192 .168 .10.99/16
The switch in this diagram is a distributed device.
■
The switch isolates all traffic in this configuration example, so you need to
■
configure local proxy ARP on VLAN-interface 2 of the router to enable the
communication between Host A and Host B. If the two ports (Ethernet 1/0 and
Ethernet 1/1) on the switch are isolated only at Layer 2, you can enable the
communication between the two hosts by configuring local proxy ARP directly
on VLAN-interface 2 of the switch.
Configuration procedure
1 Configure the Switch
# Add Ethernet 1/0, Ethernet 1/1 and Ethernet 1/2 to VLAN 2. Host A and Host B
are isolated and unable to exchange Layer 2 packets.
<Switch> system-view
[Switch] port-isolate group 2
[Switch] vlan 2
[Switch-vlan2] port ethernet 1/0
[Switch-vlan2] port ethernet 1/1
[Switch-vlan2] port ethernet 1/2
[Switch-vlan2] quit
Router
Eth1/0
VLAN 2
Vlan -int2
port-isolate group 2
Eth1/2
uplink -port
Eth1/1
Switch
192.168.10.200 /16
Proxy ARP Configuration Examples
VLAN 2
Host B
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