Dasan V5808 - Address Resolution Protocol (ARP); ARP Table; Registering ARP Table

User Manual UMN:CLI
V5808
221
7.15 Address Resolution Protocol (ARP)
Devices connected to IP network have two addresses, LAN address and network address.
LAN address is sometimes called as a data link address because it is used in Layer 2
level, but more commonly the address is known as a MAC address. A switch on Ethernet
needs a 48-bit-MAC address to transmit packets. In this case, the process of finding a
proper MAC address from the IP address is called an address resolution.
On the other hand, the progress of finding the proper IP address from the MAC address is
called reverse address resolution. DASAN Network Solutions switches and DSLAMs find
their MAC addresses from the IP addresses through Address Resolution Protocol (ARP).
ARP saves these addresses in ARP table for quick search. Referring to the IP addresses
in ARP table, the packets containing the IP address are transmitted to network. When
configuring the ARP table, it is possible to do it only in some specific interfaces.
7.15.1 ARP Table
Hosts typically have an ARP table, which is a cache of IP/MAC address mappings. The
ARP Table automatically maps the IP address to the MAC address of a switch. In addition
to address information, the table shows the age of the entry in the table, the
encapsulation method, and the switch interface (VLAN ID) where packets are forwarded.
The V5808 ARP saves IP/MAC addresses mappings in ARP table for quick search.
Referring to the information in ARP table, packets attached IP address is transmitted to
network. When configuring ARP table, it is possible to do it only in some specific
interfaces.
7.15.1.1 Registering ARP Table
The contents of ARP table are automatically registered when MAC address corresponds
to MAC address is founded. The network administrator could use MAC address of
specific IP address in Network by registering on ARP table.
To specify a static ARP entry, use the following command.
Command
Mode
Description
arp A.B.C.D MAC-ADDR
Global
Specifies a static ARP entry.
MAC-ADDR: MAC address.
arp A.B.C.D MAC-ADDR
INTERFACE
Specifies a static ARP entry with an interface name.
INTERFACE: interface name
MAC-ADDR: MAC address
no arp [A.B.C.D]
Deletes static ARP entries.
no arp A.B.C.D INTERFACE
To delete ARP entries, use the following command.
Command
Mode
Description
clear arp
Enable
Global
Bridge
Deletes all ARP entries.
clear arp INTERFACE
Deletes the ARP entries on a specified interface.