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Chapter 5 Avaya P460 Layer 3 Features
54 Avaya P460 Configuration Guide
ARP (Address Resolution Protocol) Table Configuration
ARP Overview
IP logical network addresses are independent of physical addresses. The physical
address must be used to convey data in the form of a frame from one device to
another. Therefore, a mechanism is required to acquire a destination device
hardware address from its IP address. This mechanism is called ARP (Address
Resolution Protocol).
The following mechanism describes how a station builds an ARP table:
Figure 5.3 Building an ARP Table
Station 1 sends ARP Request
Broadcast, specifying IP address of
Station 2
Station 2 receives the broadcast
and identifies its IP address
Station 2 sends an ARP Reply to
Station 1 containing Station 2 MAC
Address
Station 2 updates its ARP table
with the Station 1 address mapping
Station 1 receives the ARP Reply
Station 1 updates its ARP table
with the Station 2 address mapping