Version: current

MikroTik wired interface compatibility

MikroTik SFP/SFP+/SFP28/QSFP+/QSFP28/QSFP56-DD compatibility

This article shows the compatibility of MikroTik devices with SFP, SFP+, SFP28, QSFP+, QSFP28 and QSFP56-DD transceivers. It features detailed compatibility tables that provide valuable insights into which transceivers are suitable for use with MikroTik devices. Additionally, some practical configuration examples are provided using the RouterOS CLI to set different data transmission rates. For more detailed descriptions of properties, please refer to the Ethernet user manual.

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MikroTik devices and SFP, SFP+, SFP28, QSFP+, QSFP28 and QSFP56-DD modules do not have any restrictions for other vendor equipment.

While MikroTik cannot ensure full compatibility with modules from all manufacturers, as long as the other vendor modules and devices comply with the transceiver multi-source agreement (MSA) they should be compatible with MikroTik.

Warning: RouterOS uses a disabled FEC mode as the default setting for SFP28 and QSFP28 interfaces. To ensure a successful link with other vendor devices, you may need to enable FEC mode by configuring it to either fec74 or fec91. For more information please refer to the Ethernet user manual.

1G SFP


Model	S-RJ01	S-85DLC05D	S-31DLC20D	S-3553LC20D	S-55DLC80D	S-4554LC80D	SFP CWDM	SFP 1m/3m DAC	S+AO0005 AOC	SFP28 1m/3m DAC
CCR1072-1G-8S+	+	+	+	+	+	+	+	+	+	+
CCR1036-12G-4S	+	+	+	+	+	+	+	+	+	+
CCR1036-8G-2S+	+	+	+	+	+	+	+	+	+	+
CCR1016-12S-1S+	+ 1	+ 1	+ 1	+ 1	+ 1	+ 1	+	+	+	+
CCR1009-7G-1C	+	+	+	+	+	+	+	+	+	+
CCR1009-8G-1S-1S+	+	+	+	+	+	+	+	+	+	+
CCR1009-7G-1C-1S+	+	+	+	+	+	+	+	+	+	+
CCR2004-1G-2XS-PCIe	-	-	-	-	-	-	-	-	-	-
CCR2004-1G-12S+2XS	+	+	+	+	+	+	+	+	+	+
CCR2004-16G-2S+	+	+	+	+	+	+	+	+	+	+
CCR2116-12G-4S+	+	+	+	+	+	+	+	+	+	+
CCR2216-1G-12XS-2XQ	+	+	+	+	+	+	+	+	+	+
RDS2216-2XG-4S+4XS-2XQ	+	+	+	+	+	+	+	+	+	+
CRS125-24G-1S	+	+	+	+	+	+	+	+	+	+
CRS305-1G-4S+	+	+	+	+	+	+	+	+	+	+
CRS309-1G-8S+	+	+	+	+	+	+	+	+	+	+
CRS312-4C+8XG	-	+	+	+	+	+	+	+	+	+
CRS318-1Fi-15Fr-2S	+	+	+	+	+	+	+	+	+	+
CRS318-16P-2S+	+	+	+	+	+	+	+	+	+	+
CSS318-16G-2S+	+	+	+	+	+	+	+	+	+	+
CRS320-8P-8B-4S+	+	+	+	+	+	+	+	+	+	+
CRS326-4C+20G+2Q+	+	+	+	+	+	+	+	+	+	+
CRS326-24S+2Q+	+	+	+	+	+	+	+	+	+	+
CRS354-48G/P-4S+2Q+	+	+	+	+	+	+	+	+	+	+
CRS418-8P-8G-2S+	+	+	+	+	+	+	+	+	+	+
CRS520-4XS-16XQ	+	+	+	+	+	+	+	+	+	+
CRS518-16XS-2XQ	+	+	+	+	+	+	+	+	+	+
CRS510-8XS-2XQ	+	+	+	+	+	+	+	+	+	+
CSS/CRS326-24G-2S+	+	+	+	+	+	+	+	+	+	+
CRS317-1G-16S+	+	+	+	+	+	+	+	+	+	+
CRS328-4C-20S-4S+	+	+	+	+	+	+	+	+	+	+
CRS328-24P-4S+	+	+	+	+	+	+	+	+	+	+
CRS226-24G-2S+	-	+ 2	+ 2	+ 2	+ 2	+ 2	+	+	+	+
CRS212-1G-10S-1S+	+ 1	+ 1	+ 1	+ 1	+ 1	+ 1	+	+	+	+
CRS210-8G-2S+	-	+ 2	+ 2	+ 2	+ 2	+ 2	+	+	+	+
CRS112-8G/P-4S	+	+	+	+	+	+	+	+	+	+
CRS109-8G-1S	+	+	+	+	+	+	+	+	+	+
CRS106-1C-5S/FiberBox	+	+	+	+	+	+	+	+	+	+
RB5009	+	+	+	+	+	+	+	+	+	+
RB4011	+	+	+	+	+	+	+	+	+	+
RB3011	+	+	+	+	+	+	+	+	+	+
RB2011	+	+	+	+	+	+	+	+	+	+
L009	+	+	+	+	+	+	+	+ 14	+ 14	+ 14
RB260/CSS106	+	+	+	+	+	+	+	+	+	+
RB922/921	+	+	+	+	+	+	+	+	+	+
RB953GS	+	+	+	+	+	+	+	+	+	+
hAP AC	+	+	+	+	+	+	+	+	+	+
hAP ax S	+	+	+	+	+	+	+	+ 14	+ 14	+ 14
hEX PoE/PowerBox Pro	+	+	+	+	+	+	+	+	+	+
hEX S	+	+	+	+	+	+	+	+	+	+
hEX S (2025)	+	+	+	+	+	+	+	+ 14	+ 14	+ 14
RBFTC11	+	+ 8	+ 8	+ 8	+ 8	+ 8	+ 8	+ 8	+ 8	+ 8
FTC11XG	+	+	+	+	+	+	+	+	+	+
FTC21	+	+	+	+	+	+	+	+ 14	+ 14	+ 14
LHG XL 52 ac	-	+	+	+	+	+	+	+	+	+
RBD22/D23 mANTBox 52 15s/NetMetal ac²	-	+	+	+	+	+	+	+	+	+
L22/mANTBox ax 15s L23/NetMetal ax	+	+	+	+	+	+	+	+ 14	+ 14	+ 14
GPEN21	+	+	+	+	+	+	+	+	+	+
CSS610	+	+	+	+	+	+	+	+	+	+
CRS310-1G-5S-4S+/netFiber 9	+	+	+	+	+	+	+	+	+	+
CRS310-8G+2S+IN	+	+	+	+	+	+	+	+	+	+
CRS812-8DS-2DQ-2DDQ	+	+	+	+	+	+	+	+	+	+
CRS804-4DDQ	-	-	-	-	-	-	-	-	-	-

10G SFP+/25G SFP28


Model	S+RJ10	S+85DLC03D	S+31DLC10D	S+2332LC10D	SFP+ CWDM	SFP+ 1m/3m DAC	S+AO0005 AOC	Q+BC0003-S+	XQ+BC0003-XS+	SFP28 1m/3m DAC	SFP28 XS+31LC10D	SFP28 XS+2733LC15D	SFP28 XS+85LC01D
CCR1072-1G-8S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CCR1036-12G-4S	-	+	+	+	+	+	+	-	-	+	+	+	+
CCR1036-8G-2S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CCR1016-12S-1S+	+ 10	+	+	+	+	+	+	+ 1,5	+ 1,5	+	+	+	+
CCR1009-7G-1C	-	+	+	+	+	+	+	-	-	+	+	+	+
CCR1009-8G-1S-1S+	+ 10	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CCR1009-7G-1C-1S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CCR2004-1G-2XS-PCIe	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CCR2004-1G-12S+2XS	+ 11	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CCR2004-16G-2S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CCR2116-12G-4S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CCR2216-1G-12XS-2XQ	+	+	+	+	+	+	+	+	+	+	+	+	+
RDS2216-2XG-4S+4XS-2XQ	+	+	+	+	+	+	+	+	+	+	+	+	+
CRS125-24G-1S	-	+	+	+	+	+	+	-	-	+	+	+	+
CRS305-1G-4S+	+ 7	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS309-1G-8S+	+ 4	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS312-4C+8XG	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS318-1Fi-15Fr-2S	-	+	+	+	+	+	+	-	-	+	+	+	+
CRS318-16P-2S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CSS318-16G-2S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS320-8P-8B-4S+	+	+	+	+	+	+	+	+	+	+	+	+	+
CRS326-4C+20G+2Q+	+	+	+	+	+	+	+	+	+	+	+	+	+
CRS326-24S+2Q+	+ 6	+	+	+	+	+	+	+	+	+	+	+	+
CRS354-48G/P-4S+2Q+	+	+	+	+	+	+	+	+	+	+	+	+	+
CRS418-8P-8G-2S+	+	+	+	+	+	+	+	+	+	+	+	+	+
CRS520-4XS-16XQ	+	+	+	+	+	+	+	+	+	+	+	+	+
CRS518-16XS-2XQ	+	+	+	+	+	+	+	+	+	+	+	+	+
CRS510-8XS-2XQ	+	+	+	+	+	+	+	+	+	+	+	+	+
CSS/CRS326-24G-2S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+ 9	+ 9	+
CRS317-1G-16S+	+ 3	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS328-4C-20S-4S+	+ 10	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS328-24P-4S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+ 9	+ 9	+
CRS226-24G-2S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS212-1G-10S-1S+	+ 10	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS210-8G-2S+	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS112-8G/P-4S	-	+	+	+	+	+	+	-	-	+	+	+	+
CRS109-8G-1S	-	+	+	+	+	+	+	-	-	+	+	+	+
CRS106-1C-5S/FiberBox	-	+	+	+	+	+	+	-	-	+	+	+	+
RB5009	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
RB4011	+	+	+	+	+	+	+	+	+	+	+	+	+
RB3011	-	+	+	+	+	+	+	-	-	+	+	+	+
RB2011	-	+	+	+	+	+	+	-	-	+	+	+	+
L009	-	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14
RB260/CSS106	-	+	+	+	+	+	+	-	-	+	+	+	+
RB922/921	-	+	+	+	+	+	+	-	-	+	+	+	+
RB953GS	-	+	+	+	+	+	+	-	-	+	+	+	+
hAP AC	-	+	+	+	+	+	+	-	-	+	+	+	+
hAP ax S	-	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14
hEX PoE/PowerBox Pro	-	+	+	+	+	+	+	-	-	+	+	+	+
hEX S	-	+	+	+	+	+	+	-	-	+	+	+	+
hEX S (2025)	-	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14
RBFTC11	-	+ 8	+ 8	+ 8	+ 8	+ 8	+ 8	-	-	+ 8	+ 8	+ 8	+ 8
FTC11XG	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
FTC21	-	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14
LHG XL 52 ac	-	+	+	+	+	+	+	-	-	+	+	+	+
RBD22/D23 mANTBox 52 15s/NetMetal ac²	-	+	+	+	+	+	+	-	-	+	+	+	+
L22/mANTBox ax 15s L23/NetMetal ax	-	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14	+ 14
CSS610	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS310-1G-5S-4S+/netFiber 9	+ 10	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS310-8G+2S+IN	+	+	+	+	+	+	+	+ 5	+ 5	+	+	+	+
CRS812-8DS-2DQ-2DDQ	+	+	+	+	+	+	+	+	+	+	+	+	+
CRS804-4DDQ	-	-	-	-	-	-	-	-	-	-	-	-	-

40G QSFP+


Model	QSFP+ Q+DA0001	Q+85MP01D	Q+BC0003-S+
CRS326-4C+20G+2Q+	+	+	+
CRS326-24S+2Q+	+	+	+
CRS354-48G/P-4S+2Q+	+	+	+
CRS504-4XQ-IN	+	+	+
CRS504-4XQ-OUT	+13	+	+13
CRS510-8XS-2XQ	+	+	+
CRS518-16XS-2XQ	+	+	+
CRS520-4XS-16XQ	+	+	+
CCR2216-1G-12XS-2XQ	+	+	+
RDS2216-2XG-4S+4XS-2XQ	+	+	+
CRS812-8DS-2DQ-2DDQ	+	+	+
CRS804-4DDQ	+	+	+

100G QSFP28


Model	XQ+31LC10D	XQ+31LC02D	XQ+85MP01D	XQ+DA0001	XQ+DA0003	XQ+BC0003-XS+	XQ+CM0000-XS+
CRS326-4C+20G+2Q+	-	-	+	+	+	+	+
CRS326-24S+2Q+	-	-	+	+	+	+	+
CRS354-48G/P-4S+2Q+	-	-	+	+	+	+	+
CRS504-4XQ-IN	+	+	+	+	+	+	+
CRS504-4XQ-OUT	+	+	+	+13	+13	+13	+
CRS510-8XS-2XQ	+	+	+	+	+	+	+
CRS518-16XS-2XQ	+	+	+	+	+	+	+
CRS520-4XS-16XQ	+	+	+	+	+	+	+
CCR2216-1G-12XS-2XQ	+	+	+	+	+	+	+
RDS2216-2XG-4S+4XS-2XQ	+	+	+	+	+	+	+
CRS812-8DS-2DQ-2DDQ	+	+	+	+	+	+	+
CRS804-4DDQ	+	+	+	+	+	+	+

400G QSFP56-DD


Model	DDQ+DA0001	DDQ+DA0003	DDQ+85MP01D
CRS812-8DS-2DQ-2DDQ	+	+	+
CRS804-4DDQ	+	+	+


Legend
Color codes:	Not supported	Check notes below

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Notes:

CCR1016-12S-1S+, CRS212-1G-10S-1S+ - the SFP+1 interface does not work on any other link speed than 10G (does not support 1.25G fiber optic transceivers)
CRS226-24G-2S+, CRS210-8G-2S+- the SFP+1 interface also supports SFP 1.25G fiber optic transceivers, SFP+2 works only with 10G transceivers/links.
CSS/CRS317-1G-16S+- power controller supports up to 10 simultaneous S+RJ10 modules.
CSS/CRS309-1G-8S+- supports up to 4 simultaneous S+RJ10 modules. We do not recommend using S+RJ10 in passive cooling devices without additional cooling, as they have relatively high power consumption and in turn high operating temperature.
Q+BC0003-S+, XQ+BC0003-XS+- SFP+ connector support in the SFP+/SFP28 cages
CSS/CRS326-24S+2Q+- supports up to 12 simultaneous S+RJ10 modules
CSS/CRS305-1G-4S+- supports up to 2 simultaneous S+RJ10 modules.
RBFTC11- works connected to another device's 1G SFP port.
XS+31LC10D, XS+2733LC15D - full support has been added to CSS/CRS326-24G-2S+ and CRS328-24P-4S+ switches manufactured from October 2021.
S+RJ10 - support in the SFP+ cages.
CCR2004-1G-12S+2XS- supports up to 6 simultaneous S+RJ10 modules.
CCR2004-1G-2XS-PCIe- supports only the same speed in both SFP28 ports (2 x 25G or 2 x 10G modes).
CRS504-4XQ-OUT- reduced IP code from IP66 to IP54.
10G SFP+/25G SFP28 modules - device SFP supports up to 2.5G rate, manual speed setting is required to work.
CRS312-4C+8XG, CRS326-4C+20G+2Q+ - Combo SFP+ interfaces support 1G and 10G speeds (do not support 2.5G and 5G)

S-RJ01

Table that states in what link rates if mounted in specific MikroTik devices the S-RJ01 module will be able to work. Use these modules only with auto-negotiation enabled. Forced link speeds are not supported. They will negotiate to the correct duplex and the highest possible rate.


Model	1000	100	10
RB5009	+	+	+
RB4011	+	+	+
RB3011	+	+	+
RB922	+	+	+
RB921	+	+	+
hAP ac	+	+	+
hEX PoE	+	+	+
hEX S	+	-	-
RB953	+/+	-/+	-/+
RB2011	+	-	-
RB260/CSS106	+	-	-
RBFTC11	+	-	-
LHG XL 52 ac	-	-	-
RBD22/D23 mANTBox 52 15s/NetMetal ac²	-	-	-
CRS106	+	+	+
CRS112	+	+	+
CRS125/CRS109	+	+	+
CRS212	+	+	+
CRS226/CRS210	-	-	-
CSS/CRS305-1G-4S+	+	+	+
CSS/CRS309-1G-8S+	+	+	+
CRS318-1Fi-15Fr-2S	+	+	+
CRS318-16P-2S+	+	+	+
CSS/CRS326-24G-2S+	+	+	+
CRS354	+	+	+
CSS/CRS328-4C-20S-4S+	+	+	+
CSS/CRS328-24P-4S+	+	+	+
CSS/CRS317-1G-16S+	+	+	+
CRS326-4C+20G+2Q+	+	+	+
CRS326-24S+2Q+	+	+	+
CSS610	+	+	+
FTC11XG	+	+	+
CRS310-1G-5S-4S+/netFiber 9	+	+	+
CRS310-8G+2S+IN	+	+	+
CCR1009	+/+	+/+	+/+
CCR1016-12S-1S+	+	+	+
CCR1036-12G-4S	+	+	+
CCR1036-8G-2S+	+	+	+
CCR1072-1G-8S+	+	+	+

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Notes

The rate works fine: +
The rate does not work: -
RB953: SFP1/SFP2
CCR1009: SFP+/SFP

10 Gigabit Ethernet

S+RJ10

Use these modules only in 10G SFP+ ports with auto-negotiation enabled. Forced link speeds and configurable link speed advertisements are not supported. They will negotiate to correct duplex and highest possible rate. For proper S+RJ10 module installation and recommended use case scenarios, see S+RJ10 general guidance.

Speed	Cable type	S+RJ10 to Ethernet port
10BASE-T	Cat5e/6	100m
100BASE-T	Cat5e/6	100m
1000BASE-T	Cat5e/6	100m
2.5GBASE-T	Cat5e/6 UTP	100m
2.5GBASE-T	Cat5e/6 STP	100m
5GBASE-T	Cat5e/6	100m
10GBASE-T	Cat6/7	30m

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The negotiated speed is highly dependent on the quality and length of the cables used.

Important: S+RJ10 to S+RJ10 will always negotiate to the highest possible rate.

The latest revision of S+RJ10 contains "/r2" by the end of the serial number. It comes with the following improvements:

Jumbo frames up to 10218 Bytes at 2.5G, 5G and 10G speeds.
Actual link speed reporting.
DDM monitoring (Supply Voltage, Module temperature).

Link Speed	Max MTU
10Gbps	10218
5Gbps	10218
2.5Gbps	10218
1000Mbps	1504
100Mbps	1504
10Mbps	1504

CRS312-4C+8XG

10GE ports maximum supported cable length.

Speed	Cable type	10 Gigabit Ethernet ports
10BASE-T	Cat5e/6	100m
100BASE-T	Cat5e/6	100m
1000BASE-T	Cat5e/6	100m
2.5GBASE-T	Cat5e/6	100m
5GBASE-T	Cat5e/6	100m
10GBASE-T	Cat6/7	30m

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The negotiated speed is highly dependent on the quality and length of the cables used.

Caution: 10GE ports do not support half-duplex mode with forced link speeds.

SFP interface compatibility with 100M optical transceivers

The SFP interface on the listed devices is compatible with fast ethernet fiber links.

Compatible devices (interface):

CCR1009-7G-1C (combo1)
CCR1009-7G-1C-1S+ (combo1)
CRS106-1C-5S (combo1)
CRS328-4C-20S-4S+ (combo1 - combo4 and SFP1 - SFP20)
LHG XL 52 ac
RBD22/D23/mANTBox 52 15s/NetMetal ac²

SFP+ interface compatibility with 1G optical transceivers

For MikroTik devices with SFP+ interfaces that support both 10G and 1G link rates, the following settings must be set on both linked devices for the required interfaces. These settings only relate when optical SFP transceivers are used. In order to get them working in 1G link rate, use the following configuration:

# Since RouterOS v7.12
/interface/ethernet/set sfp-sfpplus1 auto-negotiation=no speed=1G-baseX

# Older RouterOS
/interface/ethernet/set sfp-sfpplus1 auto-negotiation=no speed=1Gbps full-duplex=yes 

Auto-negotiation disabled.
Port speed 1G.
Full-duplex.

Devices which SFP+ ports support 1G links:

CCR2004-1G-12S+2XS - All SFP+ interfaces can be used in 1G mode if required.
CCR2004-16G-2S+ - All SFP+ interfaces can be used in 1G mode if required.
CCR1072-1G-8S+ - All SFP+ interfaces can be used in 1G mode if required.
CCR1036-8G-2S+ - All SFP+ interfaces can be used in 1G mode if required.
CCR1009-8G-1S-1S+ - All SFP+ interfaces can be used in 1G mode if required.
CCR1009-7G-1C-1S+ - All SFP+ interfaces can be used in 1G mode if required.
CSS3xx series switches - All SFP+ interfaces can be used in 1G mode if required.
CRS3xx series switches - All SFP+ interfaces can be used in 1G mode if required.
RB5009 series - SFP+1 interface can be used in 1G mode if required.
RB4011 series - SFP+1 interface can be used in 1G mode if required.
CRS226-24G-2S+ - Only SFP+1 supports 1G link speed, SFP+2 is for 10G links only.
CRS210-8G-2S+ - Only SFP+1 supports 1G link speed, SFP+2 is for 10G links only.
CSS610 series switches - All SFP+ interfaces can be used in 1G mode if required.
FTC11XG - SFP+1 interface can be used in 1G mode if required.

Devices which SFP+ interfaces can be used only for 10G links:

CCR1016-12S-1S+
CRS212-1G-10S-1S+

SFP+ interface compatibility with 10G/25G optical transceivers

MikroTik devices with SFP+ ports can establish 10G links using 10G/25G optical fiber transceivers; however, an additional SFP Rate Select setting must be configured to avoid data corruption during transmission. The following settings are required on the SFP+ interface:

# Since RouterOS v7.12
/interface/ethernet/set sfp-sfpplus1 auto-negotiation=no speed=10G-baseSR-LR sfp-rate-select=low

# Older RouterOS
/interface/ethernet/set sfp-sfpplus1 auto-negotiation=no speed=10Gbps full-duplex=yes sfp-rate-select=low

This requirement applies to MikroTik 10G/25G modules:

XS+31LC10D
XS+2733LC15D

SFP+/SFP28 interface compatibility with 2.5G transceivers

The 2.5G link rate support has been implemented since RouterOS v7.3. MikroTik devices with SFP+ and SFP28 interfaces that support 2.5G link rate require the following settings to be set on both linked device interfaces.

# Since RouterOS v7.12
/interface/ethernet/set sfp-sfpplus1 auto-negotiation=no speed=2.5G-baseX

# Older RouterOS
/interface/ethernet/set sfp-sfpplus1 auto-negotiation=no speed=2.5Gbps full-duplex=yes

Auto-negotiation disabled.
Port speed 2.5G.
Full-duplex.

Devices which support 2.5G links in SFP/SFP+/SFP28 ports

CRS3xx series switches - All SFP+ interfaces can be used in 2.5G mode if required.
CCR2004-1G-12S+2XS - All SFP+ and SFP28 interfaces can be used in 2.5G mode if required.
CCR2116-12G-4S+ - All SFP+ interfaces can be used in 2.5G mode if required.
CRS5xx series - All SFP28 interfaces can be used in 2.5G mode if required.
CCR2216-1G-12XS-2XQ - All SFP28 interfaces can be used in 2.5G mode if required.
RB5009 series - The SFP+ interface can be used in 2.5G mode if required.
L009 series - The SFP interface can be used in 2.5G mode if required.
L23 series - The SFP interface can be used in 2.5G mode if required.
CSS610 series switches - All SFP+ interfaces can be used in 2.5G mode if required.
FTC11XG - The SFP+1 interface can be used in 2.5G mode if required.
E60/E62 - The SFP interface can be used in 2.5G mode if required.

QSFP+/QSFP28/QSFP56/QSFP56-DD interface supported link rates

In RouterOS, QSFP+, QSFP28, QSFP56 and QSFP56-DD interfaces are designed to handle high-speed data transmission by utilizing multiple channels. Each QSFP+, QSFP28 or QSFP56 interface is divided into four sub-interfaces and QSFP56-DD is divided into eight sub-interfaces, each corresponding to a transmission channel necessary for proper operation.

info

The naming convention for QSFP+, QSFP28, QSFP56 and QSFP56-DD sub-interfaces includes two parts:

The first digit following "qsfpplus", "qsfp28-", "qsfp56-" or "qsfp56-dd-" represents the QSFP+, QSFP28, QSFP56 or QSFP56-DD physical port.
The second digit, ranging from 1 to 4 for QSFP+, QSFP28, QSFP56 and from 1 to 8 for QSFP56-DD, denotes each of the individual channels.

Below are examples of how QSFP+, QSFP28, QSFP56 and QSFP56-DD interfaces appear in RouterOS:

# QSFP+
/interface/ethernet/print
Flags: R - RUNNING
Columns: NAME, MTU, MAC-ADDRESS, ARP, SWITCH
 #   NAME            MTU  MAC-ADDRESS        ARP      SWITCH 
 1   qsfpplus1-1    1500  48:8F:5A:B6:09:8C  enabled  switch1
 2   qsfpplus1-2    1500  48:8F:5A:B6:09:8D  enabled  switch1
 3   qsfpplus1-3    1500  48:8F:5A:B6:09:8E  enabled  switch1
 4   qsfpplus1-4    1500  48:8F:5A:B6:09:8F  enabled  switch1

# QSFP28
/interface/ethernet/print
Flags: R - RUNNING
Columns: NAME, MTU, MAC-ADDRESS, ARP, SWITCH
 #   NAME         MTU  MAC-ADDRESS        ARP      SWITCH 
 1   qsfp28-1-1  1500  DC:2C:6E:9E:11:14  enabled  switch1
 2   qsfp28-1-2  1500  DC:2C:6E:9E:11:15  enabled  switch1
 3   qsfp28-1-3  1500  DC:2C:6E:9E:11:16  enabled  switch1
 4   qsfp28-1-4  1500  DC:2C:6E:9E:11:17  enabled  switch1

# QSFP56
/interface/ethernet/print
Flags: R - RUNNING; S - SLAVE
Columns: NAME, MTU, MAC-ADDRESS, ARP, SWITCH
 #   NAME            MTU  MAC-ADDRESS        ARP      SWITCH 
 2   qsfp56-1-1     1500  04:F4:1C:1A:82:A1  enabled  switch1
 3   qsfp56-1-2     1500  04:F4:1C:1A:82:A2  enabled  switch1
 4   qsfp56-1-3     1500  04:F4:1C:1A:82:A3  enabled  switch1
 5   qsfp56-1-4     1500  04:F4:1C:1A:82:A4  enabled  switch1

# QSFP56-DD
/interface/ethernet/print
Flags: R - RUNNING; S - SLAVE
Columns: NAME, MTU, MAC-ADDRESS, ARP, SWITCH
 #    NAME            MTU  MAC-ADDRESS        ARP      SWITCH
 10   qsfp56-dd-1-1  1500  04:F4:1C:1A:82:91  enabled  switch1
 11   qsfp56-dd-1-2  1500  04:F4:1C:1A:82:92  enabled  switch1
 12   qsfp56-dd-1-3  1500  04:F4:1C:1A:82:93  enabled  switch1
 13   qsfp56-dd-1-4  1500  04:F4:1C:1A:82:94  enabled  switch1
 14   qsfp56-dd-1-5  1500  04:F4:1C:1A:82:95  enabled  switch1
 15   qsfp56-dd-1-6  1500  04:F4:1C:1A:82:96  enabled  switch1
 16   qsfp56-dd-1-7  1500  04:F4:1C:1A:82:97  enabled  switch1
 17   qsfp56-dd-1-8  1500  04:F4:1C:1A:82:98  enabled  switch1

Configuration and monitoring for these sub-interfaces may vary based on factors such as auto-negotiation, advertised speeds, and the type of transceiver (e.g., break-out cable or single fiber). The following sections will provide guidance on the configuration necessary for each use case.

info

Disabling or enabling any of the physical port sub-interfaces will trigger a reconfiguration of the entire port group, restarting all channels.

QSFP+

For MikroTik CRS3xx series devices, QSFP+ interfaces support the following link speeds:

1x 40G
4x 10G
4x 1G

Link Configuration

40G: Can be configured with either auto-negotiation or a forced 40G speed.
4x10G and 4x1G: Must be set with a forced speed mode and auto-negotiation disabled.

Starting from RouterOS version 7.12, in addition to choosing the right transmission rate, it's important to specify the correct link mode. For example, you might use CR4 for DAC(Direct Attach Copper) or SR4-LR4 for optical fiber.

Configuration Examples

For RouterOS v7.12 and later:

# 1x40G - DAC
/interface/ethernet/set qsfpplus1-1 auto-negotiation=no speed=40G-baseCR4

# 1x40G - Optical
/interface/ethernet/set qsfpplus1-1 auto-negotiation=no speed=40G-baseSR4-LR4

# 4x10G - DAC
/interface/ethernet/set qsfpplus1-1 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfpplus1-2 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfpplus1-3 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfpplus1-4 auto-negotiation=no speed=10G-baseCR  

# 4x10G - Optical
/interface/ethernet/set qsfpplus1-1 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfpplus1-2 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfpplus1-3 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfpplus1-4 auto-negotiation=no speed=10G-baseSR-LR  

warning

In single-link mode, only the first QSFP+ sub-interface needs to be configured, while the remaining sub-interfaces should remain enabled.

For RouterOS versions earlier than v7.12:

# 1x40G - DAC/Optical
/interface/ethernet/set qsfpplus1-1 auto-negotiation=no speed=40Gbps full-duplex=yes

# 4x10G - DAC/Optical
/interface/ethernet/set qsfpplus1-1 auto-negotiation=no speed=10Gbps full-duplex=yes
/interface/ethernet/set qsfpplus1-2 auto-negotiation=no speed=10Gbps full-duplex=yes
/interface/ethernet/set qsfpplus1-3 auto-negotiation=no speed=10Gbps full-duplex=yes
/interface/ethernet/set qsfpplus1-4 auto-negotiation=no speed=10Gbps full-duplex=yes 

QSFP28

For MikroTik CRS5xx series and CCR2216 devices, QSFP28 interfaces support the following link speeds:

1x 100G.
2x 50G (available since RouterOS v7.12).
1x 40G.
4x 25G.
4x 10G.
4x 1G.

warning

Not supported: 50G over single channel, 2x 40G

Link Configuration:

100G: Can be configured with either auto-negotiation or a forced 100G speed.
2x50G, 1x40G, 4x25G, 4x10G, and 4x1G: Must be set with a forced speed mode and auto-negotiation disabled.

Configuration Examples:

For RouterOS v7.12 and later:

# 1x100G - DAC
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=100G-baseCR4

# 1x100G - Optical
/interface/ethernet/set qsfp28-2-1 auto-negotiation=no speed=100G-baseSR4-LR4

# 2x50G - DAC
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=50G-baseCR2
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=50G-baseCR2

# 2x50G - Optical
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=50G-baseSR2-LR2
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=50G-baseSR2-LR2

# 4x25G - DAC
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp28-1-2 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp28-1-4 auto-negotiation=no speed=25G-baseCR

# 4x25G - Optical
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp28-1-2 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp28-1-4 auto-negotiation=no speed=25G-baseSR-LR

warning

In single-link mode, only the first QSFP28 sub-interface needs to be configured, while the remaining sub-interfaces should remain enabled. Similarly, for 2x50G link mode, only the master interfaces (e.g., qsfp28-1-1 and qsfp28-1-3) need to be configured, but the other sub-interfaces must remain enabled.

For RouterOS versions earlier than v7.12:

# 1x100G - DAC/Optical
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=100Gbps full-duplex=yes

# 4x25G - DAC/Optical
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=25Gbps full-duplex=yes
/interface/ethernet/set qsfp28-1-2 auto-negotiation=no speed=25Gbps full-duplex=yes
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=25Gbps full-duplex=yes
/interface/ethernet/set qsfp28-1-4 auto-negotiation=no speed=25Gbps full-duplex=yes

QSFP56

For the MikroTik CRS812 device, QSFP56 interfaces support the following link speeds:

1x 200G
2x 100G
4x 50G
1x 100G
2x 50G
1x 40G
4x 25G
4x 10G
4x 1G

Link Configuration

200G: Can be configured with either auto-negotiation or a forced 200G speed.
2x100G, 4x50G, 1x100G, 2x50G, 1x40G, 4x25G, 4x10G and 4x1G: Must be set with a forced speed mode and auto-negotiation disabled.

It's important to specify the correct link mode. For example, you might use CR4 for DAC(Direct Attach Copper) or SR4-LR4 for optical fiber.

Configuration Examples

# 1x200G - DAC
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=200G-baseCR4

# 1x200G - Optical
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=200G-baseSR4-LR4

# 2x100G - DAC
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=100G-baseCR2
/interface/ethernet/set qsfp56-1-3 auto-negotiation=no speed=100G-baseCR2

# 2x100G - Optical
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=100G-baseSR2-LR2
/interface/ethernet/set qsfp56-1-3 auto-negotiation=no speed=100G-baseSR2-LR2

# 4x50G - DAC
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=50G-baseCR
/interface/ethernet/set qsfp56-1-2 auto-negotiation=no speed=50G-baseCR
/interface/ethernet/set qsfp56-1-3 auto-negotiation=no speed=50G-baseCR
/interface/ethernet/set qsfp56-1-4 auto-negotiation=no speed=50G-baseCR

# 4x50G - Optical
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=50G-baseSR-LR
/interface/ethernet/set qsfp56-1-2 auto-negotiation=no speed=50G-baseSR-LR
/interface/ethernet/set qsfp56-1-3 auto-negotiation=no speed=50G-baseSR-LR
/interface/ethernet/set qsfp56-1-4 auto-negotiation=no speed=50G-baseSR-LR

# 1x100G - DAC
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=100G-baseCR4

# 1x100G - Optical
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=100G-baseSR4-LR4

# 2x50G - DAC
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=50G-baseCR2
/interface/ethernet/set qsfp56-1-3 auto-negotiation=no speed=50G-baseCR2

# 2x50G - Optical
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=50G-baseSR2-LR2
/interface/ethernet/set qsfp56-1-3 auto-negotiation=no speed=50G-baseSR2-LR2

# 4x25G - DAC
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp56-1-2 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp56-1-3 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp56-1-4 auto-negotiation=no speed=25G-baseCR

# 4x25G - Optical
/interface/ethernet/set qsfp56-1-1 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp56-1-2 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp56-1-3 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp56-1-4 auto-negotiation=no speed=25G-baseSR-LR

QSFP56-DD

For MikroTik CRS812 and CRS804 devices, QSFP56-DD interfaces support the following link speeds:

1x 400G
2x 200G
4x 100G
8x 50G
8x 25G
2x 40G
8x 10G
8x 1G

Link Configuration

400G: Can be configured with either auto-negotiation or a forced 200G speed.
2x200G, 4x100G, 8x50G, 8x25G, 2x40G, 8x10G and 8x1G: Must be set with a forced speed mode and auto-negotiation disabled.

It's important to specify the correct link mode. For example, you might use CR8 for DAC(Direct Attach Copper) or SR8-LR8 for optical fiber.

Configuration Examples

# 1x400G - DAC
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=400G-baseCR8

# 1x400G - Optical
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=400G-baseSR8-LR8

# 2x200G - DAC
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=200G-baseCR4
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=200G-baseCR4

# 2x200G - Optical
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=200G-baseSR4-LR4
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=200G-baseSR4-LR4

# 4x100G - DAC
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=100G-baseCR2
/interface/ethernet/set qsfp56-dd-1-3 auto-negotiation=no speed=100G-baseCR2
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=100G-baseCR2
/interface/ethernet/set qsfp56-dd-1-7 auto-negotiation=no speed=100G-baseCR2

# 4x100G - Optical
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=100G-baseSR2-LR2
/interface/ethernet/set qsfp56-dd-1-3 auto-negotiation=no speed=100G-baseSR2-LR2
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=100G-baseSR2-LR2
/interface/ethernet/set qsfp56-dd-1-7 auto-negotiation=no speed=100G-baseSR2-LR2

# 8x50G - DAC
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=50G-baseCR
/interface/ethernet/set qsfp56-dd-1-2 auto-negotiation=no speed=50G-baseCR
/interface/ethernet/set qsfp56-dd-1-3 auto-negotiation=no speed=50G-baseCR
/interface/ethernet/set qsfp56-dd-1-4 auto-negotiation=no speed=50G-baseCR
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=50G-baseCR
/interface/ethernet/set qsfp56-dd-1-6 auto-negotiation=no speed=50G-baseCR
/interface/ethernet/set qsfp56-dd-1-7 auto-negotiation=no speed=50G-baseCR
/interface/ethernet/set qsfp56-dd-1-8 auto-negotiation=no speed=50G-baseCR

# 8x50G - Optical
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=50G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-2 auto-negotiation=no speed=50G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-3 auto-negotiation=no speed=50G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-4 auto-negotiation=no speed=50G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=50G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-6 auto-negotiation=no speed=50G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-7 auto-negotiation=no speed=50G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-8 auto-negotiation=no speed=50G-baseSR-LR

# 8x25G - DAC
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp56-dd-1-2 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp56-dd-1-3 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp56-dd-1-4 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp56-dd-1-6 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp56-dd-1-7 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp56-dd-1-8 auto-negotiation=no speed=25G-baseCR

# 8x25G - Optical
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-2 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-3 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-4 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-6 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-7 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-8 auto-negotiation=no speed=25G-baseSR-LR

# 2x40G - DAC
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=40G-baseCR4
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=40G-baseCR4

# 2x40G  - Optical
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=40G-baseSR4-LR4
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=40G-baseSR4-LR4

# 8x10G - DAC
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfp56-dd-1-2 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfp56-dd-1-3 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfp56-dd-1-4 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfp56-dd-1-6 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfp56-dd-1-7 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfp56-dd-1-8 auto-negotiation=no speed=10G-baseCR

# 8x10G - Optical
/interface/ethernet/set qsfp56-dd-1-1 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-2 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-3 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-4 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-5 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-6 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-7 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfp56-dd-1-8 auto-negotiation=no speed=10G-baseSR-LR

QSFP+/QSFP28 interface compatibility with breakout cables

MikroTik devices can establish links between QSFP+/QSFP28 and SFP+/SFP28 ports using breakout cables.

Configuration Examples

For RouterOS v7.12 and later:

# QSFP+ - DAC
/interface/ethernet/set qsfpplus1-1 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfpplus1-2 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfpplus1-3 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfpplus1-4 auto-negotiation=no speed=10G-baseCR

# QSFP+ - Optical
/interface/ethernet/set qsfpplus1-1 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfpplus1-2 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfpplus1-3 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfpplus1-4 auto-negotiation=no speed=10G-baseSR-LR

# QSFP28 - DAC
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp28-1-2 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp28-1-4 auto-negotiation=no speed=25G-baseCR

# QSFP28 - Optical
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp28-1-2 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp28-1-4 auto-negotiation=no speed=25G-baseSR-LR

It is also possible to use QSFP28 to 2x50G QSFP28 Breakout Cables:

# 2x50G - DAC
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=50G-baseCR2
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=50G-baseCR2

# 2x50G - Optical
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=50G-baseSR2-LR2
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=50G-baseSR2-LR2

Or to configure different speed rates for each QSFP+/QSFP28 sub-interface:

# QSFP28 - DAC
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp28-1-2 auto-negotiation=no speed=25G-baseCR
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=10G-baseCR
/interface/ethernet/set qsfp28-1-4 auto-negotiation=no speed=10G-baseCR

# QSFP28 - Optical
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp28-1-2 auto-negotiation=no speed=25G-baseSR-LR
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=10G-baseSR-LR
/interface/ethernet/set qsfp28-1-4 auto-negotiation=no speed=10G-baseSR-LR

For RouterOS versions earlier than v7.12:

# QSFP+ - DAC/Optical
/interface/ethernet/set qsfpplus1-1 auto-negotiation=no speed=10Gbps full-duplex=yes
/interface/ethernet/set qsfpplus1-2 auto-negotiation=no speed=10Gbps full-duplex=yes
/interface/ethernet/set qsfpplus1-3 auto-negotiation=no speed=10Gbps full-duplex=yes
/interface/ethernet/set qsfpplus1-4 auto-negotiation=no speed=10Gbps full-duplex=yes

# QSFP28 - DAC/Optical
/interface/ethernet/set qsfp28-1-1 auto-negotiation=no speed=25Gbps full-duplex=yes
/interface/ethernet/set qsfp28-1-2 auto-negotiation=no speed=25Gbps full-duplex=yes
/interface/ethernet/set qsfp28-1-3 auto-negotiation=no speed=25Gbps full-duplex=yes
/interface/ethernet/set qsfp28-1-4 auto-negotiation=no speed=25Gbps full-duplex=yes

MikroTik SFP/SFP+/SFP28/QSFP+/QSFP28/QSFP56-DD compatibility​

1G SFP​

10G SFP+/25G SFP28​

40G QSFP+​

100G QSFP28​

400G QSFP56-DD​

S-RJ01​

10 Gigabit Ethernet​

S+RJ10​

CRS312-4C+8XG​

SFP interface compatibility with 100M optical transceivers​

Compatible devices (interface):​

SFP+ interface compatibility with 1G optical transceivers​

Devices which SFP+ ports support 1G links:​

Devices which SFP+ interfaces can be used only for 10G links:​

SFP+ interface compatibility with 10G/25G optical transceivers​

SFP+/SFP28 interface compatibility with 2.5G transceivers​

Devices which support 2.5G links in SFP/SFP+/SFP28 ports​

QSFP+/QSFP28/QSFP56/QSFP56-DD interface supported link rates​

QSFP+​

Link Configuration​

Configuration Examples​

QSFP28​

Link Configuration:​

Configuration Examples:​

QSFP56​

Link Configuration​

Configuration Examples​

QSFP56-DD​

Link Configuration​

Configuration Examples​

QSFP+/QSFP28 interface compatibility with breakout cables​

Configuration Examples​

MikroTik SFP/SFP+/SFP28/QSFP+/QSFP28/QSFP56-DD compatibility

1G SFP

10G SFP+/25G SFP28

40G QSFP+

100G QSFP28

400G QSFP56-DD

S-RJ01

10 Gigabit Ethernet

S+RJ10

CRS312-4C+8XG

SFP interface compatibility with 100M optical transceivers

Compatible devices (interface):

SFP+ interface compatibility with 1G optical transceivers

Devices which SFP+ ports support 1G links:

Devices which SFP+ interfaces can be used only for 10G links:

SFP+ interface compatibility with 10G/25G optical transceivers

SFP+/SFP28 interface compatibility with 2.5G transceivers

Devices which support 2.5G links in SFP/SFP+/SFP28 ports

QSFP+/QSFP28/QSFP56/QSFP56-DD interface supported link rates

QSFP+

Link Configuration

Configuration Examples

QSFP28

Link Configuration:

Configuration Examples:

QSFP56

Link Configuration

Configuration Examples

QSFP56-DD

Link Configuration

Configuration Examples

QSFP+/QSFP28 interface compatibility with breakout cables

Configuration Examples