Linux ARP command

First, Introduction

The ARP command is used to manipulate the host's ARP buffer, which can be used to display all entries in the ARP buffer, delete the specified entry, or add a static IP address corresponding to the MAC address.

Second, the grammar

-a< host >: Displays all entries for the ARP buffer,-h< address type >: Specifies the type of address used by the ARP directive;-d< host >  : Removes the ARP entry for the specified host from the ARP buffer;-D: Uses the hardware address of the specified interface;-E: Displays entries in the ARP buffer in the Linux display style;-i< interface >  : Specifies the network interface to operate the ARP buffer;-s< host ><mac address >: Sets the static mapping of the IP address and MAC address of the specified host;-N: Displays the entries in the ARP buffer numerically; -V: Displays detailed ARP buffer entries, including statistics for buffer entries;-f< file: Sets the static mapping of the host's IP address to the MAC address.

Third, examples

1) View ARP cache

Arp-nv

2) Add ARP cache entry

10.1. 1.1 xx:All:: £º::

3) Delete the ARP cache entry

10.1. 10.118

4) Specify the MAC address of the reply

10.0. 0.2 eth1 Pub

Tip: When eth0 receives an IP address of 10. 0.0. 2 request, reply with eth1 MAC address

Reference: http://blog.chinaunix.net/uid-9525959-id-3318814.html

Linux ARP command