H3C Technologies H3C S7500E Series Switches - Manual (Page 13)

1-1
This document is organized as follows:
z ARP Configuration
z Proxy ARP Configuration
1
ARP Configuration
When configuring ARP, go to these sections for information you are interested in:
z ARP Overview
z Configuring ARP
z Configuring Gratuitous ARP
z Displaying and Maintaining ARP
ARP Overview
The S7500E Series Ethernet Switches are distributed devices supporting Intelligent Resilient
Framework (IRF). Two S7500E series can be connected together to form a distributed IRF device. If
an S7500E series is not in any IRF, it operates as a distributed device; if the S7500E series is in an
IRF, it operates as a distributed IRF device. For introduction of IRF, refer to IRF Configuration in the
IRF Configuration Guide.
ARP Function
The Address Resolution Protocol (ARP) is used to resolve an IP address into a physical address
(Ethernet MAC address, for example).
In an Ethernet LAN, when a device sends data to another device, it uses ARP to translate the IP
address of that device to the corresponding MAC address.
ARP Message Format
ARP messages are classified into ARP requests and ARP replies. Figure 1-1 shows the format of the
ARP request/reply.