MikroTik CRS112-8G-4S-IN User Manual

User Manual
CRS112-8G-4S-IN
This device is a network switch with eight gigabit Ethernet ports and four SFP ports. It is already
configured, with all ports switched together. This unit is compatible with 1.25G SFP modules.
Safety Warnings
Before you work on any equipment, be aware of the hazards involved with electrical circuitry, and be
familiar with standard practices for preventing accidents.
Ultimate disposal of this product should be handled according to all national laws and regulations.
The Installation of the equipment must comply with local and national electrical codes.
This unit is intended to be installed in the rackmount. Please read the mounting instructions carefully
before beginning installation. Failure to use the correct hardware or to follow the correct procedures
could result in a hazardous situation for people and damage to the system.
This product is intended to be installed indoors. Keep this product away from water, fire, humidity, or
hot environments.
Use only the power supply and accessories approved by the manufacturer, which can be found in the
original packaging of this product.
Read the installation instructions before connecting the system to the power source.
We cannot guarantee that no accidents or damage will occur due to the improper use of the device.
Please use this product with care and operate at your own risk!
In the case of device failure, please disconnect it from power. The fastest way to do so is by unplugging
the power plug from the power outlet.
It is the customer's responsibility to follow local country regulations, including operation within legal
frequency channels, output power, cabling requirements, and Dynamic Frequency Selection (DFS)
requirements. All Mikrotik devices must be professionally installed.
Quick start
The Default configuration, Switch mode all interfaces are switched; LAN Configuration.
All ports are bridged with IP 192.168.88.1/24 set on the bridge.

MikroTik CRS112-8G-4S-IN Specifications

General

Switch type	Managed
Switch layer	L3
Console port	RJ-45
Power connector	DC-in jack
SFP module slots quantity	4
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity	8
Product color	White
Flash memory	16 MB
Internal memory	128 MB
Processor model	Qualcomm Atheros QCA8511
Built-in processor	Yes
Processor frequency	400 MHz
Output voltage	57 V
Power consumption (max)	13.5 W
Operating temperature (T-T)	-30 - 70 °C

Weight and Dimensions

Depth	143 mm
Width	200 mm
Height	44 mm

Summary

Safety Warnings

General Safety Precautions

General safety guidelines, accident prevention, and proper handling of electrical equipment.

Quick Start Guide

Initial Setup and Configuration

Details the default configuration, switch mode, and initial LAN IP address for the device.

Powering Options

Power Input Methods

Explains how to power the device via DC jack and passive PoE, including failover.

Connecting a PoE Adapter

Device Configuration

Initial Configuration Steps

Guides on connecting via Winbox/Web, updating software, and securing the device with a password.

Buttons and Jumpers

Reset Button Functions

LED Indicators

Understanding LED Status Lights

Mounting Instructions

Rackmount and Desktop Placement