Loopback address and network interface handling, general commands
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resets the ARP table associated with the eth0 interface.
The command
ip neigh flush all
resets the ARP table on all network interfaces
ip neigh del IPADDR lladdr xx:xx:xx:xx:xx:xx dev <ifname>
delete the entry relative to the specified IP address in the ARP table
ip neigh del 10.10.254.252 lladdr 00:0D:5A:00:00:01 dev eth0
You can add a static entry using:
ip neigh add IPADDR lladdr xx:xx:xx:xx:xx:xx dev <ifname>
For example, the command
ip neigh add 1.1.1.1 lladdr 00:00:00:00:00:01 dev eth0
associates permanently the MAC number 00:00:00:00:00:01 to the address 1.1.1.1.
The command
ip neigh
add could fail if the specified address is already associated with another
MAC address
,
in that case you can replace it with
ip neigh replace IPADDR lladdr xx:xx:xx:xx:xx:xx dev <ifname>
the above command adds the static entry if it doesn‟t exists or it just modify it if it is already there.
Disabling a network interface through IP command
In order to close a network interface, the
ip
command syntax is:
ip link set <ifname> down
In order to enable it again, the command is:
ip link set <ifname> up
Adding a network address through IP command
In order to add an address to a network interface, the
ip
command syntax is:
ip addr add <ip-address>/N dev <ifname>
In order to eliminate it, the command is:
ip addr del <ip-address>/N dev <ifname>
For example:
ip addr add 172.20.1.1/24 dev eth1
D
ISPLAY AND MANAGEMENT COMMANDS
There are various commands that consent to display the status of the router.
To display ARP table:
root@IMOLA>
show arp
