Manual:Interface

Summary

Sub-menu: /interface

MikroTik RouterOS supports a variety of Network Interface Cards as well as virtual interfaces (like Bonding, Bridge, VLAN etc.). Each of them has its own submenu, but common properties of all interfaces can be configured and read in general interface menu.

Properties

Property	Description
l2mtu (integer; Default: )	Layer2 Maximum transmission unit. Note that this property can not be configured on all interfaces. Read more>>
mtu (integer; Default: )	Layer3 Maximum transmission unit
name (string; Default: )	Name of an interface

Read-only properties

Property	Description
bytes (integer/integer;)	Total received and transmitted bytes by interface since startup. Read more>>
drops (integer/integer;)	Total packet drops since startup. Read more>>
dynamic (yes|no;)	Whether interface is dynamically created
errors (integer/integer;)	Total count of errors on interface since startup. Read more>>
packets (integer/integer;)	Total count of packets on interface since startup. Read more>>
running (yes|no;)	Whether interface is running. Note that some interface does not have running check and they are always reported as "running"
slave (yes|no;)	Whether interface is configured as a slave of another interface (for example Bonding)
dynamic (yes|no;)	Whether interface is dynamically created
type (name;)	Type of an interface (ethernet, wireless, etc.)

Traffic monitor

The traffic passing through any interface can be monitored using following command:
/interface monitor-traffic [id | name]

For example monitor ether2 and aggregate traffic. Aggregate is used to monitor total ammount of traffic handled by the router:

[maris@maris_main] > /interface monitor-traffic ether2,aggregate 
    rx-packets-per-second: 9        14
      rx-drops-per-second: 0        0
     rx-errors-per-second: 0        0
       rx-bits-per-second: 6.6kbps  10.2kbps
    tx-packets-per-second: 9        12
      tx-drops-per-second: 0        0
     tx-errors-per-second: 0        0
       tx-bits-per-second: 13.6kbps 15.8kbps

Stats

RouterOS v3.22 introduces a new command:

/interface print stats

• packets - self explainatory
• bytes - self explainatory
• drops - packets not sent/received because interface queue is full (no free descriptors), dma engine overrun/underrun
• errors - packets received with some kind of error or not transimitted because of some error

All interfaces that support this feature will be displayed. Some interfaces are not supporting Error and Drop counters at the moment (RB4XX except RB450G ether 2-5), these devices will not display these counters.

The following command now displays also errors per second, in addition to the usual stats:

/interface monitor-traffic

The following command will display all kinds of other statistics if the interface is supporting them (currently only RB450G ether2-ether5 and also RB750 ether2-ether5).

/interface ethernet print stats