# Linux - manage ARP table

###### tags: `linux` `arp` `network`

# Show ARP table
"arp -a"
"arp -an" (show numeric address)

# Flush all ARP enteries
"ip neigh flush all"

# Flush ARP entry for network 192.168.1.0/24
"ip neigh flush 192.168.1.0/24"

# Flush all ARP entries on interface eth0
"ip neigh flush dev eth0"

# Create a static ARP entity
root@python:~# arp -s 192.168.56.99 00:0c:29:c0:94:ba
root@python:~# arp -an
? (10.0.2.2) at 52:54:00:12:35:02 [ether] on enp0s3
? (192.168.56.99) at 00:0c:29:c0:94:ba [ether] PERM on enp0s8
? (192.168.56.1) at 0a:00:27:00:00:16 [ether] on enp0s8

# Delete a static ARP entity
root@python:~# arp -d 192.168.56.99
root@python:~# arp -an
? (10.0.2.2) at 52:54:00:12:35:02 [ether] on enp0s3
? (192.168.56.99) at <incomplete> on enp0s8
? (192.168.56.1) at 0a:00:27:00:00:16 [ether] on enp0s8