3Com CoreBuilder 3500, Implementation Manual, Page: 289 / 592

ARP Proxy 289
However, if the router has ARP proxy enabled, the router answers the
request of Server A with its own MAC address — thus, all traffic sent to
Server B from Server A is addressed to the corresponding IP interface on
the router and forwarded appropriately.
Figure 56 Proxy ARP
With ARP proxy enabled on the router,
the MAC address of IP interface
10.10.1.1 is returned to server A
when server A sends an ARP message
for Server B’s MAC address.
Server A
Server B
10.10.1.2/255.255.0.0
10.10.1.1/255.255.255.0
10.10.2.1/255.255.255.0
10.10.2.2/255.255.0.0
L3