Local Proxy Arp; Enabling Proxy Arp - HP A5120 EI Series Configuration Manual

Local Proxy ARP

As shown in
to GigabitEthernet 1/0/3 while Host B connects to GigabitEthernet 1/0/1. Enable local proxy ARP on
switch A to allow Layer 3 communication between the two hosts.
Figure 6 Application environment of local proxy ARP
192.168.10.100/16
Host A
192.168.10.99/16
In each of the following cases, you must enable local proxy ARP:
Hosts connecting to different isolated Layer 2 ports in the same VLAN need to communicate at Layer

3.
If an isolate-user-VLAN is configured, hosts in different secondary VLANs of the isolate-user-VLAN

need to communicate at Layer 3.

Enabling proxy ARP

Follow these steps to enable proxy ARP in VLAN interface view:
To do...
Enter system view
Enter interface view
Enable proxy ARP
Follow these steps to enable local proxy ARP in VLAN interface view:
To do...
Enter system view
Enter interface view
Enable local proxy ARP
Figure 6, Host A and Host B belong to VLAN 2, but are isolated at Layer 2. Host A connects
Switch A
VLAN 2
Vlan-int2
GE1/0/2
GE1/0/3
GE1/0/1
Switch B
Use the command...
system-view
interface interface-type interface-
number
proxy-arp enable
Use the command...
system-view
interface interface-type interface-
number
local-proxy-arp enable [ ip-range
startIP to endIP ]
VLAN 2
port-isolate group
Host B
192.168.10.200/16
11
Remarks
—
—
Required
Disabled by default.
Remarks
—
—
Required
Disabled by default.