MikroTik CRS312-4C+8XG-RM User Manual

Cloud Router Switch CRS312-4C+8XG

CRS312-4C+8XG is 8-port Gigabit Ethernet switch with four 10g Ethernet / SFP+, combo ports. Includes all basic functionality for a managed switch and more.

Quick start

• Mount unit or place on the flat surface, please see Mounting paragraph for instructions.

• Connect two powering units to the AC source.

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

• Use Winbox to connect to the default IP address of 192.168.88.1 from any port, with the username admin

and no password.

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

version to ensure the best performance and stability.

• Set up your password to secure the device.

Mounting

The device is designed to use indoors and it can be mounted in a rackmount enclosure using provided rack mounts, or it can be placed on the desktop. Please attach rubber pegs on the bottom of the router if the desired placement is on the flat surface or use a Phillips screwdriver to attach rackmount ears on both sides of the device if designated use is for rackmount enclosure:

1. Attach rack ears to both sides of the device and tighten four screws to secure them in place, as shown on the picture.

2. Place the device in rackmount enclosure and align with the holes so that device fits conveniently.

3. Tighten screws to secure it in place.

The IP rating scale for this device is IPX0. The device has no protection from water contamination, please ensure the placement of the device in a dry and ventilated environment. We recommend shielded Cat5/6 cables for our devices. Mounting and configuration of this device should be done by a qualified person.

See mikrotik.com/products for the latest version of this document. Document #49280 Modified on: 23.JUL.2019

Configuration

The device is set up as a switch, with 192.168.88.1 as the management IP of the bridge interface. The switch supports booting RouterOS (for routing and switching configuration) or SwOS (for only using as a switch). By default, the device will boot RouterOS, but you can reboot into the other operating system in the following ways:

• From SwOS: In the System menu, click “Boot RouterOS” button on the bottom of the page.

• From RouterOS: in the System, RouterBOARD menu, click “Settings” and there select “Boot OS”.

It is also possible to select the OS and configure other boot settings via the serial console menu. Serial console for configuration for RS-232 serial port, set by default to 115200 bit/s, 8 data bits, 1 stop bit, no

parity. Standard RJ45 to COM cable can be used. To find detailed serial console configuration and pinout please visit serial console section in our wiki pages here: https://wiki.mikrotik.com/wiki/Manual:System/Serial_Console

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

For recovery purposes, it is possible to boot the device from the network, see Reset button section.

Powering

The device accepts power from two alternative current inputs at range AC 100-240 V. Dual power supplies for⏦ redundancy with IEC power connectors.

The power consumption under maximum load can reach 60 W.

Expansion slots and ports

• 1x RJ45 console port (set at 115200bits/s, 8 data bits, 1 stop bit no parity).

• 1x 10/100Mbit Ethernet port for management access.

• Eight 2.5G/5G/10G Ethernet ports.

• Four 10g Ethernet / SFP+, combo ports.

• One USB type A slot.

• Four cooling fans with automatic fan speed control.

Combo interface

The four combo interfaces each have two physical connectors of which only one can be used at the same time. The ports will be automatically represented as combo 1-4 in RouterOS. It is possible to select which physical port will be used in RouterOS software ethernet menu. If left to default “auto”, and both F/T have cables plugged in, SFP will take priority. For example, if you have plugged an Ethernet cable into the 1T port and an SFP module in the 1F port, you will have to choose in RouterOS which one to use. Double click the respective combo interface in RouterOS GUI to see which socket is used.

Reset button

The RouterBOOT reset button has the following functions. Press the button and apply the power, then:

• Release the button when a green LED starts flashing, to reset RouterOS configuration to defaults.

• Release the button when the LED turns solid green to clear all configuration and defaults.

• Release the button after LED is no longer lit (~20 seconds) to cause a device to look for Netinstall servers

(required for reinstalling RouterOS over the network).

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. Useful for RouterBOOT debugging and recovery.

Operating system support

The device supports dual boot SwOS software version 2.9 and RouterOS v6. The specific factory installed version number is indicated in the RouterOS menu /system resource. Other operating systems have not been tested.