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22 arp configuration, Arp overview, Arp function – H3C Technologies H3C WX6000 Series Access Controllers User Manual

Page 158: Arp message format, Arp configuration

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ARP Configuration

Support of the H3C WX series access controllers for features may vary by device model. For more

information, see "Feature Matrixes" in Compatibility Matrixes.

The sample output in this manual was created on the WX5004. The output on your device may

vary.

The grayed out functions or parameters on the Web interface indicate that they are not supported

or cannot be modified.

The models listed in this manual are not applicable to all regions. Please consult your local sales

office for the models applicable to your region.

ARP Overview

ARP Function

The Address Resolution Protocol (ARP) is used to resolve an IP address into an Ethernet MAC address

(or physical address).

In an Ethernet LAN, when a device sends data to another device, it uses ARP to translate the IP

address of the destination device to the corresponding MAC address.

ARP Message Format

ARP messages are classified into ARP requests and ARP replies.

Figure 22-1

shows the format of the

ARP request/reply.

Figure 22-1 ARP message format

The following describe the fields in

Figure 22-1

.

Hardware type: This field specifies the hardware address type. The value “1” represents Ethernet.