Arp Table - H3C S7500 Series Operation Manual

Operation Manual – ARP
H3C S7500 Series Ethernet Switches
Table 1-1
Table 1-1 Description on the fields of an ARP packet
Hardware Type
Protocol type
Hardware address length
Protocol address length
Operation code
Sender hardware address
Sender IP address
Target hardware address
Target IP address
Table 1-2 Values of the hardware type field
1
2
3
4
5
6
7

1.1.3 ARP Table

In an Ethernet network, two hosts must know each other's MAC address for them to
communicate with each other. For this reason, each host on the network maintains an
ARP table, which contains some lately used IP address-to-MAC address mapping
entries. Note that this manual only introduces basic implementation of ARP table.
describes the fields of an ARP packet.
Field
Value
Description
Type of the hardware interface. See
the valid values of this field.
Type of the protocol address to be mapped. For IP
address, the value of this field is 0x0800.
Length of the hardware address (in bytes)
Length of the protocol address (in bytes)
Type of the packet, which can be:
1: ARP request
2: ARP reply
3: RARP request
4: RARP reply
Hardware address of the sender
IP address of the sender
This field is null for an ARP request, and is the
hardware address of the receiver for an ARP reply.
IP address of the receiver
Description
Ethernet
Experimental Ethernet
X.25
Proteon ProNET (Token Ring)
Chaos
IEEE 802.x
ARC network
1-2
Chapter 1 ARP Configuration
Table 1-2 for