H3C S3100 8C SI Operation Manual page 452

S3100 series ethernet switches
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Operation Manual – ARP
H3C S3100 Series Ethernet Switches
Length of hardware address Length of protocol address
Length of hardware address Length of protocol address
Figure 1-1 ARP message format
Table 1-1
Table 1-1 Description on the fields of an ARP packet
Hardware Type
Protocol type
Length of hardware address
Length of protocol address
Operator
Hardware address of the sender
IP address of the sender
Hardware address of the receiver
IP address of the receiver
Hardware type (16 bits)
Hardware type (16 bits)
Hardware type (16 bits)
Protocol type (16 bits)
Protocol type (16 bits)
Operator (16 bits)
Operator (16 bits)
Hardware address of the sender
Hardware address of the sender
IP address of the sender
IP address of the sender
Hardware address of the receiver
Hardware address of the receiver
IP address of the receiver
IP address of the receiver
describes the fields of an ARP packet.
Field
Description
Type of the hardware interface. Refer to
1-2
for the information about the field values.
Type of protocol address to be mapped.
0x0800 indicates an IP address.
Hardware address length (in bytes)
Protocol address length (in bytes)
Indicates the type of a data packets, which
can be:
1: ARP request packets
2: ARP reply packets
3: RARP request packets
4: RARP reply packets
Hardware address of the sender
IP address of the sender
For an ARP request packet, this field is
null.
For an ARP reply packet, this field carries
the hardware address of the receiver.
IP address of the receiver
1-2
Chapter 1 ARP Configuration
Table

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