SNR S2989G-24TX-POE — настройка функции локального прокси ARP на сетевых устройствах [191/553]

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S2989G-24TX Operation Manual

Chapter 3 IP services Configuration

3-29

3.10.2

ARP Local Proxy Function Configuration Task

List

1． Enable/disable ARP local proxy function

1．Enable/disable ARP local proxy function

3.10.3

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 ARP local proxy is enabled on S1, then all interfaces on S1 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:

Switch(config)#interface vlan 1

Switch(Config-if-Vlan1)#ip address 192.168.1.1 255.255.255.0

Switch(Config-if-Vlan1)#ip local proxy-arp

Command

Explanation

Interface vlan mode

ip local proxy-arp

no ip local proxy-arp

Enable or disable ARP local proxy

function.