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.. _routing-static-arp:
.. meta::
:description: The Address Resolution Protocol (ARP) resolves
network-layer addresses to link-layer MAC addresses.
:keywords: arp, network, protocol, mac, address, ipv4, static
###
ARP
###
The :abbr:`ARP (Address Resolution Protocol)` resolves IPv4 network layer addresses
to link layer MAC addresses.
addresses. This mapping is essential for communication within the Internet
Protocol suite. ARP was standardized in 1982 by :rfc:`826` (STD 37).
.. note:: In Internet Protocol version 6 (IPv6) networks, address resolution is
performed by the Neighbor Discovery Protocol (NDP).
Use the following commands to configure or view ARP table entries.
Configuration
-------------
.. cfgcmd:: set protocols static arp interface <interface> address <host> mac <mac>
**Configure a static ARP entry on the specified interface.**
This creates a permanent mapping between an IP address and a MAC address
on the specified interface.
Example:
.. code-block:: none
set protocols static arp interface eth0 address 192.0.2.1 mac 01:23:45:67:89:01
Operation
---------
.. opcmd:: show protocols static arp
Show all ARP table entries across all interfaces.
.. code-block:: none
vyos@vyos:~$ show protocols static arp
Address HWtype HWaddress Flags Mask Iface
10.1.1.1 ether 00:53:00:de:23:2e C eth1
10.1.1.100 ether 00:53:00:de:23:aa CM eth1
.. opcmd:: show protocols static arp interface <interface>
Show all ARP table entries for the specific interface.
Example for ``eth1``:
.. code-block:: none
vyos@vyos:~$ show protocols static arp interface eth1
Address HWtype HWaddress Flags Mask Iface
10.1.1.1 ether 00:53:00:de:23:2e C eth1
10.1.1.100 ether 00:53:00:de:23:aa CM eth1
.. _ARP: https://en.wikipedia.org/wiki/Address_Resolution_Protocol
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