GS1500-24P User’s Guide
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CHAPTER 18
Dynamic ARP
This chapter describes how to activate dynamic Address Resolution Protocol (ARP)
learning and how to enter static ARP table entries.
18.1 ARP Table Overview
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol
address (IP address) to a physical machine address, also known as a Media Access
Control or MAC address, on the local area network.
An IP (version 4) address is 32 bits long. In an Ethernet LAN, MAC addresses are
48 bits long. The ARP table maintains an association between each MAC address
and its corresponding IP address.
18.2 What You Can Do
•Use the Dynamic ARP Setting screen (Section 18.4 on page 133) to specify
whether ports are trusted or untrusted ports for ARP inspection.
•Use the Dynamic ARP VLAN Setting screen (Section 18.5 on page 134) to
enable ARP inspection on each VLAN.
•Use the MAC IP Binding screen (Section 18.6 on page 135) to manage static
MAC-IP bindings for DHCP snooping and ARP inspection.
18.3 What You Need to Know
Read on for concepts on Dynamic ARP that can help you configure the screens in
this chapter.
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