MIKROTIK MTK CRS3284C20S4 Instructions

CRS328-4C-20S-4S+RM

Quick start

• Mount unit in a rackmount cabinet or place on the flat surface (see “Mounting”).

• Connect two powering units to the AC source using power cords.

• 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 RouterOS software to the latest

version to ensure the best performance and stability.

• Set up your password to secure the device.

Powering

• The device accepts powering from two IEC connectors. AC input range 100-240 V .⏦

The power consumption under maximum load can reach 43 W.

Booting process

The device 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 the “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.

Configuration

Full RouterOS and SwOS documentation is located here: http://mt.lv/help
This device is not preconfigured other than an IP address on the bridge interface. You can connect from any port,

as all ports are switched together by default. Another configuration has to be applied according to the
documentation manual linked above.

The Initial connection has to be done via the Ethernet cable, using the MikroTik WinBox utility. WinBox should be
used to connect to the default IP address of 192.168.88.1 from any port, with the username admin and no
password.

For recovery purposes, it is possible to boot the device for reinstallation, see Buttons and jumpers.
In case the IP connection is not available, the WinBox utility can also be used to connect to the MAC address of the

the device. Applies only when device has booted RouterOS.
The device is equipped with an RJ45 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, pinout can be found here: http://mt.lv/console

Extension slots and ports

• 20 SFP ports.

• 4 SFP+ ports, which accept both 1.25 Gb SFP and 10 Gb SFP+ modules.

• 4 combo ports, consisting of four twisted pair (T) sockets and four SFP sockets (F).

• RJ45 serial port.

Please visit wiki pages for MikroTik SFP module compatibility table:

https://wiki.mikrotik.com/wiki/MikroTik_SFP_module_compatibility_table

See mikrotik.com/products for the latest version of this document. Page 1, Document #52503 Modified on: 07.OKT.2019

Combo ports

The four combo interfaces each have two physical connectors of which the only one can be used at the same time.
The ports will be automatically represented as combo1-4 in the 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.

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 in the picture.

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

Mounting and configuration of this device should be done by a qualified person. We recommend using Cat6 cables
for our devices.

See mikrotik.com/products for the latest version of this document. Page 2, Document #52503 Modified on: 07.OKT.2019