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< SwOS
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SwOS is an operating system designed specifically for administration of MikroTik Switch products.

SwOS is configurable from your web browser. It gives you all the basic functionality for a managed switch, plus more: allows to manage port-to-port forwarding, broadcast storm control, apply MAC filter, configure VLANs, mirror traffic, apply bandwidth limitation and even adjust some MAC and IP header fields.


Warning: Each RouterBoard switch series device has its own firmware which cannot be installed on other series models! CSS326-24G-2S+ supports SwOS v2.0 and newer.

Connecting to the Switch

Open your web browser and enter IP address of your Switch ( by default) and login screen will appear.

CSS326 SwOS Login

SwOS default IP address:, user name: admin and there is no password.


Note: MikroTik neighbor discovery protocol tools can be used to discover IP address of Mikrotik Switch. Manual:IP/Neighbor_discovery

Interface Overview

SwOS interface menu consists of several tabs: Link, SFP, Forwarding, Statistics, VLAN, VLANs, Static Hosts, Hosts, SNMP, ACL and System.

Description of buttons in SwOS configuration tool:

  • Append - add new item to the end of the list
  • Apply All - applies current configuration changes
  • Cut - removes item from the list
  • Clear - resets properties of the item
  • Discard Changes - removes unsaved configuration
  • Insert - add new item to the list (places it before current item)
  • Sort - sort VLAN table by VLAN-IDs; sort host table by MAC addresses

  • Change Password - changes password of the switch
  • Logout - logout from current Switch
  • Reboot - reboot the switch
  • Reset Configuration - reset configuration back to factory defaults
  • Choose File - browse for upgrade or backup file
  • Upgrade - upgrade firmware of the Switch
  • Restore Backup - restore Switch using selected backup file
  • Save Backup - generate and download backup file from the Switch

System Tab

System Tab performs the following functions:

  • General information about Switch
  • Switch management
  • Configuration reset
  • Backup and restore configuration
  • Firmware upgrade

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General settings

Note: SwOS uses a simple algorithm to ensure TCP/IP communication - it just replies to the same IP and MAC address packet came from. This way there is no need for Default Gateway on the device itself.

Property Description
IP AddressIP address of the Switch
IdentityName of the Switch (for Mikrotik neighbor discovery protocol)
Allow FromIP address from which the service is accessible. Default value is '' - any address
Allow From PortsList of switch ports from which the service is accessible
Allow From VLANVLAN ID with which the service is accessible (VLAN Mode on ingress port must be other than disabled in order to connect)
Mikrotik Discovery ProtocolEnable or disable Mikrotik neighbor discovery protocol
WatchdogEnable or disable system watchdog. It will reset CPU of the switch in case of fault condition
MAC AddressMAC address of the Switch (Read-only)
VersionFirmware version of the Switch
UptimeCurrent Switch uptime

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System management settings

Health and Global RSTP

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CSS326 Health and Global RSTP settings

Property Description
TemperatureShows PCB temperature in celsius temperature scale
Bridge Priority (hex)If enabled, it will turn off short detection on all PoE out ports to allow use of longer ethernet cables. This is potentially dangerous setting and should be used with caution.
Port Cost ModeShows the input voltage measured in volts
Root BridgeShows the input voltage measured in volts