Arp - Local Proxy - Lenovo RackSwitch G8264 Application Manual

ARP - Local Proxy

© Copyright Lenovo 2016
An IP interface or a routed port that has local proxy ARP enabled allows the
RackSwitch G8264 to respond to all ARP requests for IP addresses within the
subnetwork, and to forward all traffic between hosts in the subnetwork. This
feature is useful when hosts in a subnetwork are separated at Layer 2 with features
such as Private VLAN. After responding to an ARP request, the G8264 sends an
ARP request to the destination host for creating an ARP entry, if such an entry does
not already exist in the ARP cache. If VRRP is enabled, the G8264 uses the virtual
router MAC address of the master in the ARP response. If VRRP is not enabled, the
G8264 uses the switch base MAC address.
When local proxy ARP is enabled on an interface, ICMP redirects must be disabled
globally.
This feature can be enabled using the following commands:
On an IP interface:
RS G8264(config-ip-if)# ip local-proxy-arp
On a routed port:
RS G8264(config-if)# ip local-proxy-arp
For more information on routed ports, see Chapter 28, "Routed Ports."
Chapter 26: Basic IP Routing
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