Mikrotik CRS112-8G-4S-IN Manual

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CRS112-8G-4S-IN

CRS112-8G-4S-INCRS112-8G-4S-IN

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.

Place on the flat surface (see “Mounting”).

Connect your PC to any Ethernet port.

Connect the power adapter to the DC jack.

Set IP for your PC to 192.168.88.2

The Initial connection has to be done via the Ethernet cable, using the MikroTik Winbox utility or Web

browser.

Use Winbox or Web browser to connect to the default IP address of 192.168.88.1 from any port, with the

username admin and no password . (or, for some models, check user and wireless passwords on the sticker)

We recommend clicking the “Check for updates” button and updating your RouterOS software to the latest

version to ensure the best performance and stability. The device needs to have an active internet

connection.

To manually update the device go to our webpage and download the latest software version packages.

Open Winbox and upload them to the Files menu.

Reboot the device.

Set up your password to secure the device.

Powering

The board accepts power from the direct-input power jack (5.5 mm outside and 2 mm inside, female, pin-positive plug) and accepts 10-57 V DC. The

Ethernet port 1 also accepts passive PoE power input. The power consumption of this device under maximum load is up to 11 W. It is possible to connect

both power inputs at the same time and they will work in failover mode (input with higher voltage will work as the main source).

Connecting to a PoE Adapter:

Connect the Ethernet cable from the device to the PoE+DATA port of the PoE adapter.

Connect an Ethernet cable from your local network (LAN) to the PoE adapter.

Connect the power cord to the adapter, and then plug the power cord into a power outlet.

Configuration

The device is set up as a switch, with 192.168.88.1 as the management IP of the bridge interface. RouterOS includes many configuration options in

addition to what is described in this document. We suggest starting here to get yourself accustomed to the possibilities: .https://mt.lv/help

In case the IP connection is not available, the Winbox tool ( ) can be used to connect to the MAC address of the device.https://mt.lv/winbox

The device is equipped with an RJ45 serial port, set by default to 115200 bit/s, 8 data bits, 1 stop bit, and no parity. Standard RJ45 to COM cable can be

used, pinout can be found in the documentation (see link above).

For recovery purposes, it is possible to boot the device for reinstallation, see the next section.

Buttons and Jumpers

The reset button has these functions:

Hold this button during boot time until the user LED light starts flashing, and release the button to reset the RouterOS configuration.

Keep holding the button for 5 more seconds or until the user LED turns off, then release it to make the RouterBOARD look for Netinstall servers.

The first Ethernet port is used for the Netinstall process.

Regardless of the above option used, the system will load the backup RouterBOOT loader if the button is pressed before power is applied to the device.

Release the button before LED begins to flash, to only load the backup RouterBOOT without reset. This is useful for RouterBOOT debugging and recovery.

LED indicators

The power LED is lit when the router is powered by the DC jack or PoE.

The user LED can be configured from RouterOS.

The port LEDs indicate the individual Ethernet and SFP port activity.

Mounting