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The default configuration is Switch:
*all interfaces switched;
LAN configuration.

The Default configuration, Switch mode all interfaces are switched; LAN Configuration.
All ports 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 you 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.
• 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.

https://wiki.mikrotik.com/wiki/SwOS/CRS3xx#Connecting_to_the_Switch

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This device is designed for use indoors by placing it on the flat surface or mounting on the wall when mounting on the wall, please ensure that cable feed is pointing downwards. We recommend using Cat5/6 shielded cable for our devices. The IP rating scale for this device is IPX0.distance measured in mm.

Image Added

Powering

The device accepts powering from the two DC power jacks (redundancy fail-over) or from the first Ethernet port:

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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://wiki.mikrotik.com/wiki/Manual:CRS3xx_series_switches.
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 reinstall the device from the network, see the Reset button17498190.
In case the IP connection is not available, the Winbox tool (https://mt.lv/winbox) can also be used to connect to the MAC address of the device. Applies only when the device has booted RouterOS.

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Note. Information contained here is subject to change. Please visit the product page on www.mikrotik.com for the most up to date version of this document.

BG. Инструкция: Свържете адаптера на захранване, за да включите устройството. Отворете 192.168.88.1 в уеб браузър, за да настроите продукта. Повече информация в {_}{+}https://mt.lv/help-bg+_^{Image Modified}
CS. Návod k použití: Připojte napájecí adaptér k zapnutí přístroje. Otevřete 192.168.88.1 ve webovém prohlížeči pro konfiguraci produktu. Více informací najdete v {_}{+}https://mt.lv/help-cs+_^{Image Modified}
DA. Instruktionsbog: Tilslut strømadapteren for at tænde for enheden. Åbn 192.168.88.1 i en webbrowser til at konfigurere produktet. Mere information i {_}{+}https://mt.lv/help-da+_^{Image Modified}
DE. Bedienungsanleitung: Verbinden Sie das Netzteil, um das Gerät einzuschalten. Öffnen Sie 192.168.88.1 in einem Web-Browser, um das Produkt zu konfigurieren. Weitere Informationen im {_}{+}https://mt.lv/help-de+_^{Image Modified}
EL. εγχειρίδιο οδηγιών: Συνδέστε τον προσαρμογέα τροφοδοσίας για να ενεργοποιήσετε τη μονάδα. Ανοίξτε 192.168.88.1 σε ένα πρόγραμμα περιήγησης στο Web για να διαμορφώσετε το προϊόν. Περισσότερες πληροφορίες στο {_}{+}https://mt.lv/help-el+_^{Image Modified}
EN. Instruction manual: Connect the power adapter to turn on the device. Open 192.168.88.1 in your web browser, to configure it. More information on {_}{+}https://mt.lv/help+_^{Image Modified}
ES. Manual de instrucciones: Conecte el adaptador de alimentación para encender la unidad. Abra 192.168.88.1 en un navegador web para configurar el producto. Más información en {_}{+}https://mt.lv/help-es+_^{Image Modified}
ET. Kasutusjuhend: Ühendage toiteadapter seadme sisselülitamiseks. Avatud 192.168.88.1 in veebilehitseja seadistada toodet. Rohkem teavet {_}{+}https://mt.lv/help-et+_^{Image Modified}
FI. Käyttöohje: Kytke virtalähde päälle laitteen. Avaa 192.168.88.1 in selaimen määrittää tuotteen. Lisää tietoa {_}{+}https://mt.lv/help-fi+_^{Image Modified}
FR. Mode d'emploi: Connectez l'adaptateur d'alimentation pour allumer l'appareil. Ouvrez 192.168.88.1 dans un navigateur Web pour configurer le produit. Plus d'informations dans {_}{+}https://mt.lv/help-fr+_^{Image Modified}
HR. Uputa za uporabu: Priključite napajanje i uključite uređaj. Za konfiguraciju uređaja u pregledniku otvorite 192.168.88.1. Više informacija je na {_}{+}https://mt.lv/help-hr+_^{Image Modified}
HU. Használati utasítás: Csatlakoztassa a hálózati adaptert a készülék bekapcsolásához. Megnyitása 192.168.88.1 egy webböngészőben beállítani a terméket. Több információ {_}{+}https://mt.lv/help-hu+_^{Image Modified}
IT. Manuale di istruzioni: Collegare l'adattatore di alimentazione per accendere l'unità. Aprire 192.168.88.1 in un browser Web per configurare il prodotto. Maggiori informazioni in {_}{+}https://mt.lv/help-it+_^{Image Modified}
IS. Notkunarleiðbeiningar: Tengdu straumbreytinn til að kveikja á tækinu. Opnaðu 192.168.88.1 í vafra til að stilla það. Nánari
upplýsingar á {_}{+}https://mt.lv/help-is+_^{Image Modified}
NO. Instruksjonsmanual: Koble strømadapteren for å slå på enheten. Åpne 192.168.88.1 i nettleseren din for å konfigurere den. Mer informasjon på {_}{+}https://mt.lv/help-no+_^{Image Modified}
LT. Naudojimosi instrukcija: Prijunkite maitinimo adapterį įjunkite įrenginį. Į interneto naršyklę 192.168.88.1 Atidarykite galite konfigūruoti gaminį. Daugiau informacijos rasite {_}{+}https://mt.lv/help-lt+_^{Image Modified}
LV. Lietošanas instrukcija: Pievienojiet Strāvas adapteri, lai ieslēgtu ierīci. Atvērt 192.168.88.1 ar interneta pārlūku, lai konfigurētu produktu. Plašāka informācija {_}{+}https://mt.lv/help-lv+_^{Image Modified}
MT. Manwal tal-istruzzjoni: Qabbad l-adapter tal-qawwa biex iddawwar it-tagħmir. Iftaħ 192.168.88.1 fil-web browser tiegħek, biex jiġi kkonfigurat. Aktar informazzjoni fuq {_}{+}https://mt.lv/help-mt+_^{Image Modified}
NL. Handleiding: Sluit voedingsadapter aan op het apparaat in te schakelen. Open 192.168.88.1 in een webbrowser om het product te configureren. Meer informatie in {_}{+}https://mt.lv/help-nl+_^{Image Modified}
PL. Instrukcja obsługi: Podłącz adapter zasilania, aby włączyć urządzenie. Otwórz 192.168.88.1 w przeglądarce internetowej, aby skonfigurować urządzenie. Więcej informacji w {_}{+}https://mt.lv/help-pl+_^{Image Modified}
PT. Manual de instruções: Conecte o adaptador de alimentação para ligar o aparelho. Abra 192.168.88.1 em um navegador da web para configurar o produto. Mais informações em {_}{+}https://mt.lv/help-pt+_^{Image Modified}
RO. Instrucțiuni de utilizare: Conectați adaptorul de alimentare pentru a porni aparatul. Deschide 192.168.88.1 într-un browser web pentru a configura produsul. Mai multe informații în {_}{+}https://mt.lv/help-ro+_^{Image Modified}
SK. Navodila: Priključite napajalnik za vklop naprave. Odprite 192.168.88.1 v spletnem brskalniku nastaviti izdelek. Več informacij v
{_}{+}https://mt.lv/help-sk+_^{Image Modified}
SL. Návod na použitie: Pripojte napájací adaptér k zapnutiu prístroja. Otvorte 192.168.88.1 vo webovom prehliadači pre konfiguráciu produktu. Viac informácií nájdete v {_}{+}https://mt.lv/help-sl+_^{Image Modified}
SV. Instruktionsmanual: Anslut nätadaptern för att slå på enheten. Öppna 192.168.88.1 i en webbläsare för att konfigurera produkten. Mer information på {_}{+}https://mt.lv/help-sv+_^{Image Modified}
NO. Bruksanvisningen: Koble strømadapteren for å slå på enheten. Åpne 192.168.88.1 i en nettleser for å konfigurere produktet. Mer informasjon på {_}{+}https://mt.lv/help-no+_^{Image Modified}
RU. Руководство по эксплуатации: подключите адаптер питания чтобы включить устройство. Откройте 192.168.88.1 в своем веб-браузере для конфигурации. Дополнительная информация https://mt.lv/help-ru
CN. 说明书。 连接电源适配器以打开设备。 在Web浏览器中打开192.168.88.1进行配置。 有关{_}{+}https://mt.lv/help-zh+_^{Image Modified} 的更多信息