Will the 10g sfp+ ports support 1g/gige sfp's (i.e. are the ports 1g and/or 10g capable)?

If you try to use a 1Gbit SFP transceiver that isn’t from MikroTik you will likely at first have problems and it might not work. If this happens you have to go into RouterOS and turn off auto negotiate for that port. You want to manually select the speed as well. Then I’d recommend that you use masking tape or a label maker to mark the physical router so that you or a future user knows that one of the ports has auto negotiate turned off. You’ll actually need to do this with the MikroTik S+RJ10 as well as it has problems sticking too the highest speed your cable can handle (it’s a multi speed 1G/2.5G/5G/10G transceiver) I don’t know if SwitchOS has the same problems.

Do these switches have the ability for mlag? i.e. i want to have two of these as core switches for redundancy.

I don't believe so. You would need to check with MikroTik to see if that feature is available in the Router OS.

Will cisco sfp-10g-sr and sfp-10g-lrm sfp's work in this?

Cisco compatibles have worked well for me. This is not nearly as finicky as a Cisco switch.

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MikroTik CRS309-1G-8S+in

Product ID: 111350480

Details

Brand
MikroTik
Color
White
Compatible Devices
Desktop
Included Components
Power adapter
Number of Ports
9

⚡8x 10G SFP+ ports for blazing speed

🔌PoE support for streamlined power & data

🖥️Dual boot RouterOS & SwitchOS flexibility

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Description

🚀 Elevate your network game with MikroTik’s 10G powerhouse!

COMPACT RACK READY - Sleek metal case with included rack ears fits perfectly in any professional workspace or home server rack.
ENERGY EFFICIENT DESIGN - Low power consumption reduces your UPS load by 20%, saving energy and cutting operational costs.
BLAZING 10 G CONNECTIVITY - 8 SFP+ ports deliver ultra-fast 10Gbps fiber speeds, perfect for prosumer homelabs and small data centers.
POWER OVER ETHERNET READY - Simplify your setup with PoE support, powering devices directly through the network cable—less clutter, more efficiency.
DUAL OS FOR ULTIMATE CONTROL - Switch seamlessly between RouterOS’s advanced features and SwitchOS’s intuitive GUI to match your management style.

The MikroTik CRS309-1G-8S+IN is a managed gigabit switch featuring 8 high-speed 10G SFP+ ports and PoE support, designed for prosumers and IT professionals seeking powerful, flexible, and energy-efficient networking. It offers dual boot options between RouterOS and SwitchOS, enabling advanced customization or simple management. Compact and rack-mountable, it delivers enterprise-grade performance at a consumer-friendly price point.

Specifications

ASIN	B07NFXN4SS
Best Sellers Rank	#171 in Computer Networking Switches
Brand	MikroTik
Built-In Media	Power adapter 24 V 1.2 A, Rack ears, Screw kit
Case Material Type	Metal
Color	White
Compatible Devices	Desktop
Customer Reviews	4.6 4.6 out of 5 stars (379)
Data Transfer Rate	1000 megabits_per_second
Interface	RJ45
Item Dimensions L x W x H	5.55"L x 4.53"W x 1.1"H
Item Weight	1.1 pounds
Manufacturer	MIKROTIK
Mfr Part Number	CRS309-1G-8S+IN
Model Number	CRS309-1G-8S+IN
Number of Items	1
Number of Layers	1
Number of Ports	9
Platform	No Operating System
Switch Type	Managed
Unit Count	1 Count
Upper Temperature Rating	70 °C
Voltage	12 volts
Warranty Description	2 year manufacturer

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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134.68 OMR

Duties & taxes included

In stock

Sold byAmazon OMANDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to OMAN.

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Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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