Operation Manual – ARP
H3C S5600 Series Ethernet Switches
Chapter 1 ARP Configuration
1-1
Chapter 1 ARP Configuration
When configuring ARP, go to these sections for information you are interested in:
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Introduction to ARP
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Configuring ARP
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Configuring Gratuitous ARP
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Displaying and Debugging ARP
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ARP Configuration Examples
Note:
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The ARP attack detection feature is added to this manual. For details, refer to
section
Introduction
to
ARP
Attack
Detection
.
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The ARP packet rate limit feature is added to the manual. For details, refer to
section
Introduction to ARP Packet Rate Limit
.
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The periodical sending of gratuitous ARP packets feature is added. For details, refer
to section
Introduction to Gratuitous ARP
.
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The proxy ARP feature is added. For details, refer to
Proxy ARP Configuration
.
1.1 Introduction to ARP
1.1.1 ARP Function
Address Resolution Protocol (ARP) is used to resolve an IP address into a data link
layer address.
An IP address is the address of a host at the network layer. To send a network layer
packet to a destination host, the device must know the data link layer address (MAC
address, for example) of the destination host or the next hop. To this end, the IP
address must be resolved into the corresponding data link layer address.
Note:
Unless otherwise stated, a data link layer address in this chapter refers to a 48-bit
Ethernet MAC address.
