Planet XGS3-24042 User Manual download pdf (Page 208)

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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

22.4.4 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.

22.5 ARP

22.5.1 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

address in the same IP segment of the port but not the same physical network, if the port has enabled proxy

ARP, the port would reply to the ARP with its own MAC address and forward the actual packets received.

Enabling proxy ARP allows machines physically separated but of the same IP segment ignores the physical

separation and communicate via proxy ARP interface as if in the same physical network.

22.5.2 ARP Configuration Task List

ARP Configuration Task List:

1. Configure static ARP

2. Configure proxy ARP

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