Hi @alexi1 , you have two options:
1: use the dedicated management port. Connect via Ethernet to your machine.
2: use any of the LAN ports. Your machine will get an IP via dhcp.
The username you’ll need is the serial of the MX, no password required.
Enjoy
Darren OConnor | doconnor@resalire.co.uk
https://www.linkedin.com/in/darrenoconnor/
I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.