Arp Local Proxy Function Configuration Task List; Typical Examples Of Arp Local Proxy Function - Planet XGS3-42000R User Manual

25.2 ARP Local Proxy Function Configuration Task List

1．Enable/disable ARP local proxy function
Interface vlan mode
ip local proxy-arp
no ip local proxy-arp

25.3 Typical Examples of ARP Local Proxy Function

As shown in the following figure, S1 is a medium/high-level layer-3 switch supporting ARP local proxy, S2 is
layer-2 access switches supporting interface isolation.
Considering security, interface isolation function is enabled on S2. Thus all downlink ports of S2 is isolated
from each other, making all ARP messages able to be forwarded through S1. if A RP local proxy is enabled on
S1, then all interfaces on S 1 isolate ARP while S1 serves as an ARP proxy. As a result, IP flow will be
forwarded at layer 3 through S1 instead of S2.
We can configure as follows:
XGS 3-42000R(config)#interface vlan 1
XGS 3-42000R(config-if-Vlan1)#ip address 192.168.1.1 255.255.255.0
XGS 3-42000R(config-if-Vlan1)#ip local proxy-arp
XGS 3-42000R(config-if-Vlan1)#exit
Command Explanation
Enable or disable ARP local proxy function.
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