network monitor

net-tools (Stop maintain)

• procfs

• ioctl

iproute2

• netlink

Show all interface state

• ifconfig -a

• ip li sh

Enable/Disable interface link

• sudo ifconfig $interface_name up/down

• sudo ip link set up/down $interface_name

Assign ip address //iproute2 could give one more address to a link (ifconfig need to give alias)

• sudo ifconfig $interface_name $ipaddr_with_mask

• sudo ip addr add $ipaddr_with_mask dev $interface_name

alias ip 1. sudo vconfig add $interface_name $vlan 2. sudo ifconfig $interface_name.$vlan:1 $ip1 3. sudo ifconfig $interface_name.$vlan:2 $ip2

Remove ip address

• sudo ifconfig $interface_name 0

• sudo ip addr del $ip_addr dev $interface_name

Show interface ip address

• ifconfig $interface_name (Show only one address)

• ip addr show dev $interface_name

Show ipv6 address

• ifconfig $interface_name (Show only one address)

• ip -6 addr show dev $interface_name

Assign ipv6 address

• sudo ifconfig $interface_name inet6 add $ipv6_addr_with_mask

• sudo ip -6 addr add $ipv6_addr_mask dev $interface_name

Remove ipv6 address

• sudo ifconfig $interface_name inet6 del $ipv6_addr_with_mask

• sudo ip -6 addr del $ipv6_addr_with_mask dev $interface_name

Modify MAC address

• sudo ifconfig $interface_name hw ether $MAC

• sudo ip link set dev $interface_name address $MAC

List Routing Table

• route -an (netstat -rn)

• ip ro sh (ip route show)

Add and modify default route

• sudo route add default gw $gw_ip $interface_name $ sudo route del default gw $gw_ip $interface_name

• sudo ip route add default via $gw_ip dev $interface_name $ sudo ip route replace default via $gw_ip dev $interface_name

Add and remove static route

• sudo route add -net 172.16.32.0/24 gw 192.168.1.1 dev eth0 $ sudo route del -net 172.16.32.0/24

• sudo ip route add 172.16.32.0/24 via 192.168.1.1 dev eth0 $ sudo ip route del 172.16.32.0/24

Check network state

• netstate

• ss -l

List ARP table

• arp -an

• ip neigh

Add static arp

• sudo arp -s 192.168.1.100 00:0c:29:c0:5a:ef $ sudo arp -d 192.168.1.100

• sudo ip neigh add 192.168.1.100 lladdr 00:0c:29:c0:5a:ef dev eth0 $ sudo ip neigh del 192.168.1.100 dev eth0