Manual:Interface/Ethernet
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Applies to RouterOS: v3, v4+
Summary
Sub-menu: /interface ethernet
Standards: IEEE 802.3
MikroTik RouterOS supports various types of Ethernet interfaces - ranging from 10Mbps to 10Gbps Ethernet over copper twisted pair, 1Gbps and 10Gbps SFP/SFP+ interfaces and 40Gbps QSFP interface. Certain RouterBoard devices are equipped with a combo interface that simultaneously contains two interface types (e.g. 1Gbps Ethernet over twisted pair and SFP interface) allowing to select the most suitable option or creating a physical link failover. Through RouterOS, it is possible to control different Ethernet related properties like link speed, auto-negotiation, duplex mode, etc, monitor a transceiver diagnostic information and see a wide range of Ethernet related statistics.
Properties
| Property | Description |
|---|---|
| advertise (10M-full | 10M-half | 100M-full | 100M-half | 1000M-full | 1000M-half | 2500M-full | 5000M-full | 10000M-full; Default: ) | Advertised speed and duplex modes for Ethernet interfaces over twisted pair, only applies when auto-negotiation is enabled. Advertising higher speeds than the actual interface supported speed will have no effect, multiple options are allowed. |
| arp (disabled | enabled | proxy-arp | reply-only; Default: enabled) | Address Resolution Protocol mode:
|
| auto-negotiation (yes | no; Default: yes) | When enabled, the interface "advertises" its maximum capabilities to achieve the best connection possible.
|
| bandwidth (integer/integer; Default: unlimited/unlimited) | Sets max rx/tx bandwidth in kbps that will be handled by an interface. TX limit is supported on all Atheros switch-chip ports. RX limit is supported only on Atheros8327/QCA8337 switch-chip ports. |
| cable-setting (default | short | standard; Default: default) | Changes the cable length setting (only applicable to NS DP83815/6 cards) |
| combo-mode (auto | copper | sfp; Default: auto) | When auto mode is selected, the port that was first connected will establish the link. In case this link fails, the other port will try to establish a new link. If both ports are connected at the same time (e.g. after reboot), the priority will be the SFP/SFP+ port. When sfp mode is selected, the interface will only work through SFP/SFP+ cage. When copper mode is selected, the interface will only work through RJ45 Ethernet port. |
| comment (string; Default: ) | Descriptive name of an item |
| disable-running-check (yes | no; Default: yes) | Disable running check. If this value is set to 'no', the router automatically detects whether the NIC is connected with a device in the network or not. Default value is 'yes' because older NICs do not support it. (only applicable to x86) |
| tx-flow-control (on | off | auto; Default: off) | When set to on, the port will generate pause frames to the upstream device to temporarily stop the packet transmission. Pause frames are only generated when some routers output interface is congested and packets cannot be transmitted anymore. auto is the same as on except when auto-negotiation=yes flow control status is resolved by taking into account what other end advertises. Feature is supported on AR724x, AR9xxx, QCA9xxx CPU ports, all CCR ports and all Atheros switch chip ports. |
| rx-flow-control (on | off | auto; Default: off) | When set to on, the port will process received pause frames and suspend transmission if required. auto is the same as on except when auto-negotiation=yes flow control status is resolved by taking into account what other end advertises. Feature is supported on AR724x, AR9xxx, QCA9xxx CPU ports, all CCR ports and all Atheros switch chip ports. |
| full-duplex (yes | no; Default: yes) | Defines whether the transmission of data appears in two directions simultaneously, only applies when auto-negotiation is disabled. |
| l2mtu (integer [0..65536]; Default: ) | Layer2 Maximum transmission unit. Read more>> |
| mac-address (MAC; Default: ) | Media Access Control number of an interface. |
| master-port (name; Default: none) | Outdated property, more details about this property can be found in the Master-port page. |
| mdix-enable (yes | no; Default: yes) | Whether the MDI/X auto cross over cable correction feature is enabled for the port (Hardware specific, e.g. ether1 on RB500 can be set to yes/no. Fixed to 'yes' on other hardware.) |
| mtu (integer [0..65536]; Default: 1500) | Layer3 Maximum transmission unit |
| name (string; Default: ) | Name of an interface |
| orig-mac-address (read-only: MAC; Default: ) | Original Media Access Control number of an interface. |
| poe-out (auto-on | forced-on | off; Default: off) | Poe Out settings. Read more >> |
| poe-priority (integer [0..99]; Default: ) | Poe Out settings. Read more >> |
| sfp-rate-select (high | low; Default: high) | |
| speed (10Mbps | 10Gbps | 100Mbps | 1Gbps; Default: ) | Sets interface data transmission speed which takes effect only when auto-negotiation is disabled. |
Read-only properties
| Property | Description |
|---|---|
| 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) |
| switch (integer) | ID to which switch chip interface belongs to. |
Menu specific commands
| Property | Description |
|---|---|
| blink ([id, name]) | Blink Ethernet leds |
| monitor ([id, name]) | Monitor ethernet status. Read more>> |
| reset-counters ([id, name]) | Reset stats counters. Read more>> |
| reset-mac-address ([id, name]) | Reset MAC address to manufacturers default. |
| cable-test (string) | Shows detected problems with cable pairs. Read More >> |
Monitor
To print out a current link rate, duplex mode, and other Ethernet related properties or to see detailed diagnostics information for transceivers, use /interface ethernet monitor command. The provided information can differ for different interface types (e.g. Ethernet over twisted pair or SFP interface) or for different transceivers (e.g. SFP and QSFP).
Properties
| Property | Description |
|---|---|
| advertising (10M-full | 10M-half | 100M-full | 100M-half | 1000M-full | 1000M-half | 2500M-full | 5000M-full | 10000M-full) | Advertised speeds and duplex modes for Ethernet interfaces over twisted pair, only applies when auto-negotiation is enabled |
| auto-negotiation (disabled | done | failed | incomplete) | Current auto negotiation status:
|
| default-cable-settings (short | standard) | Default cable length setting (only applicable to NS DP83815/6 cards)
|
| full-duplex (yes | no) | Whether transmission of data occurs in two directions simultaneously |
| link-partner-advertising (10M-full | 10M-half | 100M-full | 100M-half | 1000M-full | 1000M-half | 2500M-full | 5000M-full | 10000M-full) | Link partner advertised speeds and duplex modes for Ethernet interfaces over twisted pair, only applies when auto-negotiation is enabled |
| rate (10Mbps | 100Mbps | 1Gbps | 2.5Gbps | 5Gbps | 10Gbps | 40Gbps |) | Actual data rate of the connection. |
| status (link-ok | no-link | unknown) | Current link status of an interface
|
| tx-flow-control (yes | no) | Whether TX flow control is used |
| rx-flow-control (yes | no) | Whether RX flow control is used |
| combo-state (copper | sfp) | Used combo-mode for combo interfaces |
| sfp-module-present (yes | no) | Whether a trasnceiver is in cage |
| sfp-rx-lose (yes | no) | Whether a receiver signal is lost |
| sfp-tx-fault (yes | no) | Whether a transceiver laser is in fault state |
| sfp-type (SFP-or-SFP+ | DWDM-SFP | QSFP+) | Used trasnceiver type |
| sfp-connector-type (SC | LC | optical-pigtail | copper-pigtail | multifiber-parallel-optic-1x12 | no-separable-connector | RJ45) | Used transceiver connector type |
| sfp-link-length-9um (m) | Transceiver supported link length for single mode 9/125um fiber |
| sfp-link-length-50um (m) | Transceiver supported link length for multi mode 50/125um fiber (OM2) |
| sfp-link-length-62um (m) | Transceiver supported link length for multi mode 62.5/125um fiber (OM1) |
| sfp-link-length-copper (m) | Detected link length when copper transceiver is used |
| sfp-vendor-name (string) | Transceiver manufacturer |
| sfp-vendor-part-number (string) | Transceiver part number |
| sfp-vendor-revision (string) | Transceiver revision number |
| sfp-vendor-serial (string) | Transceiver serial number |
| sfp-manufacturing-date (date) | Transceiver manufacturing date |
| sfp-wavelength (nm) | Transceiver laser wavelength |
| sfp-temperature (C) | Transceiver temperature |
| sfp-supply-voltage (V) | Transceiver supply voltage |
| sfp-tx-bias-current (mA) | Transceiver Tx bias current |
| sfp-tx-power (dBm) | Transceiver transmitted optical power |
| sfp-rx-power (dBm) | Transceiver received optical power |
| eeprom-checksum (good | bad) | Whether EEPROM checksum is correct |
| eeprom (hex dump) | Raw EEPROM of the transceiver |
Example output of an Ethernet status:
[admin@MikroTik] > /interface ethernet monitor ether1
name: ether1
status: link-ok
auto-negotiation: done
rate: 1Gbps
full-duplex: yes
tx-flow-control: no
rx-flow-control: no
advertising: 10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full
link-partner-advertising: 10M-half,10M-full,100M-half,100M-full,1000M-full
Example output of a SFP status:
[admin@MikroTik] > /interface ethernet monitor sfp-sfpplus24
name: sfp-sfpplus24
status: link-ok
auto-negotiation: done
rate: 10Gbps
full-duplex: yes
tx-flow-control: no
rx-flow-control: no
advertising:
link-partner-advertising:
sfp-module-present: yes
sfp-rx-loss: no
sfp-tx-fault: no
sfp-type: SFP-or-SFP+
sfp-connector-type: LC
sfp-link-length-50um: 80m
sfp-link-length-62um: 30m
sfp-vendor-name: Mikrotik
sfp-vendor-part-number: S+85DLC03D
sfp-vendor-revision: A
sfp-vendor-serial: STST85S84700155
sfp-manufacturing-date: 18-12-07
sfp-wavelength: 850nm
sfp-temperature: 33C
sfp-supply-voltage: 3.251V
sfp-tx-bias-current: 6mA
sfp-tx-power: -2.843dBm
sfp-rx-power: -1.203dBm
eeprom-checksum: good
eeprom: 0000: 03 04 07 10 00 00 00 20 40 0c c0 06 67 00 00 00 ....... @...g...
0010: 08 03 00 1e 4d 69 6b 72 6f 74 69 6b 20 20 20 20 ....Mikr otik
0020: 20 20 20 20 00 00 00 00 53 2b 38 35 44 4c 43 30 .... S+85DLC0
0030: 33 44 20 20 20 20 20 20 41 20 20 20 03 52 00 45 3D A .R.E
0040: 00 1a 00 00 53 54 53 54 38 35 53 38 34 37 30 30 ....STST 85S84700
0050: 31 35 35 20 31 38 31 32 30 37 20 20 68 f0 05 b6 155 1812 07 h...
0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........
0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........
0080: 64 00 d8 00 5f 00 dd 00 8c a0 6d 60 88 b8 71 48 d..._... ..m`..qH
0090: 1d 4c 00 fa 17 70 01 f4 31 2d 04 ea 27 10 06 30 .L...p.. 1-..'..0
00a0: 31 2d 01 3c 27 10 01 8e 00 00 00 00 00 00 00 00 1-.<'... ........
00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........
00c0: 00 00 00 00 3f 80 00 00 00 00 00 00 01 00 00 00 ....?... ........
00d0: 01 00 00 00 01 00 00 00 01 00 00 00 00 00 00 26 ........ .......&
00e0: 21 8a 7f 00 0c cd 14 4c 1d 9c 00 00 00 00 00 00 !......L ........
00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........
Detect Cable Problems
Cable test can detect problems or measure the approximate cable length if the cable is unplugged on the other end and there is therefore, "no-link". RouterOS will show:
- which cable pair is damaged
- the distance to the problem
- how exactly the cable is broken - short-circuited or open-circuited
This also works if the other end is simply unplugged - in that case, the total cable length will be shown.
Here is example output:
[admin@CCR] > interface ethernet cable-test ether2
name: ether2
status: no-link
cable-pairs: open:4,open:4,open:4,open:4
In the above example, the cable is not shorted but “open” at 4 meters distance, all cable pairs equally faulty at the same distance from the switch chip.
Currently cable-test is implemented on the following devices:
- CCR series devices
- CRS1xx series devices
- CRS2xx series devices
- OmniTIK series devices
- RB450G series devices
- RB951 series devices
- RB2011 series devices
- RB4011 series devices
- RB750Gr2
- RB750UPr2
- RB751U-2HnD
- RB850Gx2
- RB931-2nD
- RB941-2nD
- RB952Ui-5ac2nD
- RB962UiGS-5HacT2HnT
- RB1100AHx2
- RB1100x4
- RBD52G-5HacD2HnD
- RBcAPGi-5acD2nD
- RBmAP2n
- RBmAP2nD
- RBwsAP-5Hac2nD
- RB3011UiAS-RM
- RBMetal 2SHPn
- RBDynaDishG-5HacD
- RBLDFG-5acD
- RBLHGG-5acD
Note: Currently cable-test is not supported on Combo ports.
Stats
Using /interface ethernet print stats command, it is possible to see a wide range of Ethernet related statistics. The list of statistics can differ between different RouterBoard devices. The list below contains all available counters across all RouterBoard devices.
| Property | Description |
|---|---|
| rx-1024-1518 (integer) | Total count of received 1024 to 1518 byte packets |
| rx-128-255 (integer) | Total count of received 128 to 255 byte packets |
| rx-1519-max (integer) | Total count of received packets larger than 1519 bytes |
| rx-256-511 (integer) | Total count of received 256 to 511 byte packets |
| rx-512-1023 (integer) | Total count of received 512 to 1023 byte packets |
| rx-64 (integer) | Total count of received 64 byte packets |
| rx-65-127 (integer) | Total count of received 65 to 127 byte packets |
| rx-align-error (integer) | Total count of received align error messages |
| rx-broadcast (integer) | Total count of received broadcast packets |
| rx-bytes (integer) | Total count of received bytes |
| rx-fcs-error (integer) | Total count of received frames with incorrect checksum |
| rx-fragment (integer) | Total count of received fragmented frames |
| rx-multicast (integer) | Total count of received multicast packets |
| rx-overflow (integer) | Total count of received overflowed packets |
| rx-pause (integer) | Total count of received pause frames |
| rx-runt (integer) | Total count of received frames shorter than the minimum 64 bytes but with a valid CRC |
| rx-too-long (integer) | Total count of received packets that were larger than the maximum packet size |
| tx-1024-1518 (integer) | Total count of transmitted 1024 to 1518 byte packets |
| tx-128-255 (integer) | Total count of transmitted 128 to 255 byte packets |
| tx-1519-max (integer) | Total count of transmitted packets larger than 1519 bytes |
| tx-256-511 (integer) | Total count of transmitted 256 to 511 byte packets |
| tx-512-1023 (integer) | Total count of transmitted 512 to 1023 byte packets |
| tx-64 (integer) | Total count of transmitted 64 byte packets |
| tx-65-127 (integer) | Total count of transmitted 65 to 127 byte packets |
| tx-align-error (integer) | Total count of transmitted align error messages |
| tx-broadcast (integer) | Total count of transmitted broadcast packets |
| tx-bytes (integer) | Total count of transmitted bytes |
| tx-fcs-error (integer) | Total count of transmitted frames with incorrect checksum |
| tx-fragment (integer) | Total count of transmitted fragmented frames |
| tx-multicast (integer) | Total count of transmitted multicast packets |
| tx-overflow (integer) | Total count of transmitted overflowed packets |
| tx-pause (integer) | Total count of transmitted pause frames |
| tx-runt (integer) | Total count of transmitted frames shorter than the minimum 64 bytes but with a valid CRC |
| tx-too-long (integer) | Total count of transmitted packets that were larger than the maximum packet size |
For example, output of Ethernet stats on hAP ac2 device:
[admin@MikroTik] > /interface ethernet print stats
name: ether1 ether2 ether3 ether4 ether5
driver-rx-byte: 182 334 805 898 0 5 836 927 820 24 895 692 0
driver-rx-packet: 4 449 562 546 0 4 320 155 362 259 449 0
driver-tx-byte: 15 881 099 971 0 70 502 669 211 60 498 056 53
driver-tx-packet: 52 724 428 0 54 231 229 106 498 1
rx-bytes: 178 663 398 808 0 5 983 590 739 1 358 140 795 0
rx-too-short: 0 0 0 0 0
rx-64: 12 749 144 0 362 459 125 917 0
rx-65-127: 9 612 406 0 20 366 513 292 189 0
rx-128-255: 6 259 883 0 1 672 588 261 013 0
rx-256-511: 2 950 578 0 211 380 278 147 0
rx-512-1023: 3 992 258 0 185 666 163 241 0
rx-1024-1518: 119 034 611 0 2 796 559 696 254 0
rx-1519-max: 0 0 0 0 0
rx-too-long: 0 0 0 0 0
rx-broadcast: 12 025 189 0 1 006 377 64 178 0
rx-pause: 0 0 0 0 0
rx-multicast: 4 687 869 0 36 188 220 136 0
rx-fcs-error: 0 0 0 0 0
rx-align-error: 0 0 0 0 0
rx-fragment: 0 0 0 0 0
rx-overflow: 0 0 0 0 0
tx-bytes: 16 098 535 973 0 72 066 425 886 225 001 772 0
tx-64: 1 063 375 0 924 855 37 877 0
tx-65-127: 26 924 514 0 2 442 200 959 209 0
tx-128-255: 14 588 113 0 924 746 295 961 0
tx-256-511: 1 323 733 0 1 036 515 33 252 0
tx-512-1023: 1 287 464 0 2 281 554 3 625 0
tx-1024-1518: 7 537 154 0 48 212 304 64 659 0
tx-1519-max: 0 0 0 0 0
tx-too-long: 0 0 0 0 0
tx-broadcast: 590 0 145 800 823 038 0
tx-pause: 0 0 0 0 0
tx-multicast: 0 0 1 039 243 41 716 0
tx-underrun: 0 0 0 0 0
tx-collision: 0 0 0 0 0
tx-excessive-collision: 0 0 0 0 0
tx-multiple-collision: 0 0 0 0 0
tx-single-collision: 0 0 0 0 0
tx-excessive-deferred: 0 0 0 0 0
tx-deferred: 0 0 0 0 0
tx-late-collision: 0 0 0 0 0
Switch
Sub-menu: /interface ethernet switch
This submenu allows configuration of certain RouterBoard switch chip features. Read more >>.
PoE out
Sub-menu: /interface ethernet poe
PoE out settings are only available on RouterBOARD devices that have this hardware feature present. See more here: PoE-Out
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