Arp Table - 3Com 4210 9-Port Configuration Manual

Table 1-1 describes the fields of an ARP packet.
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
Table 1-2 Description on the values of the hardware type field
1
2
3
4
5
6
7

ARP Table

In an Ethernet, the MAC addresses of two hosts must be available for the two hosts to communicate
with each other. Each host in an Ethernet maintains an ARP table, where the latest used IP
address-to-MAC address mapping entries are stored. Switch 4210 Family provide the display arp
command to display the information about ARP mapping entries.
ARP entries in a Switch 4210 can either be static entries or dynamic entries, as described in
Field
Value
Description
Type of the hardware interface. Refer to
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
Ethernet
Experimental Ethernet
X.25
Proteon ProNET (Token Ring)
Chaos
IEEE802.X
ARC network
1-2
Table 1-2
Description
Table
for
1-3.