IP Addressing

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IP Addressing

Submenu level: /ip address

Description

IP addresses serve for a general host identification purposes in IP networks. Typical (IPv4) address consists of four octets. For proper addressing the router also needs the network mask value, id est which bits of the complete IP address refer to the address of the host, and which - to the address of the network. The network address value is calculated by binary AND operation from network mask and IP address values. It's also possible to specify IP address followed by slash "/" and amount of bits assigned to a network mask.
In most cases, it is enough to specify the address, the netmask, and the interface arguments. The network prefix and the broadcast address are calculated automatically.
It is possible to add multiple IP addresses to an interface or to leave the interface without any addresses assigned to it. Leaving a physical interface without an IP address is not a must when the bridging between interfaces is used. In case of bridging, the IP address can be assigned to any interface in the bridge, but actually the address will belong to the bridge 
 
interface. You can use /ip address print detail to see to which interface the address belongs to.
MikroTik RouterOS has following types of addresses:

• Static - manually assigned to the interface by a user
• Dynamic - automatically assigned to the interface by estabilished ppp, ppptp, or pppoe connections

Property Description

actual-interface (read-only: name) - only applicable to logical interfaces like bridges or tunnels. Holds the name of the actual hardware interface the logical one is bound to.

address (IP address) - IP address

broadcast (IP address; default: 255.255.255.255) - broadcasting IP address, calculated by default from an IP address and a network mask

disabled (yes | no; default: no) - specifies whether the address is disabled or not

interface (name) - interface name the IP address is assigned to

netmask (IP address; default: 0.0.0.0) - specifies network address part of an IP address

network (IP address; default: 0.0.0.0) - IP address for the network. For point-to-point links it should be the address of the remote end

Notes

You cannot have two different IP addresses from the same network assigned to the router. Exempli gratia, the combination of IP address 10.0.0.1/24 on the ether1 interface and IP address 10.0.0.132/24 on the ether2 interface is invalid, because both addresses belong to the same network 10.0.0.0/24. Use addresses from different networks on different interfaces, or enable proxy-arp on ether1 or ether2.

Example

[admin@MikroTik] ip address> add address=10.10.10.1/24 interface=ether2

[admin@MikroTik] ip address> print

Flags: X - disabled, I - invalid, D - dynamic

  #   ADDRESS            NETWORK         BROADCAST       INTERFACE

  0   2.2.2.1/24         2.2.2.0         2.2.2.255       ether2

  1   10.5.7.244/24      10.5.7.0        10.5.7.255      ether1

  2   10.10.10.1/24      10.10.10.0      10.10.10.255    ether2

[admin@MikroTik] ip address>