SNR S2989G-48TX [178/553] Introduction to arp

S2989G-24TX Operation Manual

Chapter 3 IP services Configuration

3-16

Figure 3-4 URPF Typical

In the network, topology shown in the graph above, IP URPF function is enabled on

SW3. When there is someone in the network pretending to be someone else by using his

IP address to launch a vicious attack, the switch will drop all the attacking messages

directly through the hardware function.

Enable the URPF function in SW3.

SW3 configuration task sequence:

Switch3#config

Switch3(config)#urpf enable

3.4.4

URPF Troubleshooting

 If all configurations are normal but URPF still can’t operate as expected, please

enable the URPF debug function and use “show urpf” command to observe whether

URPF is enabled, and send the result to the technology service center.

3.5

ARP

3.5.1

Introduction to ARP

ARP (Address Resolution Protocol) is mainly used to resolve IP address to Ethernet

MAC address. Switch supports both dynamic ARP and static ARP

configuration.Furthermore, switch supports the configuration of proxy ARP for some

applications. For instance, when an ARP request is received on the port, requesting an IP