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This document is organized as follows:
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ARP Configuration
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Proxy ARP Configuration
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ARP Configuration
When configuring ARP, go to these sections for information you are interested in:
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ARP Overview
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Configuring ARP
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Configuring Gratuitous ARP
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Displaying and Maintaining ARP
Support for configuring ARP Quick Notify is newly added in V05.02.00P19 of 3Com 4500G series
Ethernet switches, For details, refer to
Configuring ARP Quick Notify
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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 a LAN, when a host or other network device is to send data to another host or device, the sending
host or device must know the network layer address (that is, the IP address) of the destination host or
device. Because IP datagrams must be encapsulated within Ethernet frames before they can be
transmitted over physical networks, the sending host or device also needs to know the physical address
of the destination host or device. Therefore, a mapping between the IP address and the physical
address is needed. ARP is the protocol to implement the mapping function.
