Managing The Address Resolution Protocol (Arp) - ADC CUDA 3 Administration Manual

284 C 14: C
HAPTER ONFIGURING

Managing the Address Resolution Protocol (ARP)

IP
On a physical network on which devices have Media Access Control (MAC)
addresses (for example, Ethernet), ARP is used to map the MAC addresses to
IP addresses. Managing ARP consists of the following tasks:
Displaying the ARP cache
Adding ARP entries
Deleting ARP entries
Configuring the ARP Timeout
Clearing the ARP Cache
Each host on an IP network has two addresses:
MAC address — Identifies the host at layer 2, the datalink layer, of the
OSI model.
IP address — Identifies the host at layer 3 of the OSI model and indicates
the network to which it belongs.
To forward packets to a host on an IP network, an interface must know the
IP address of the target host. Once the interface learns IP-to-MAC address
mapping for a host, it stores this information in its ARP cache.
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