Default ip admin with empty password

VLAN modes enabled and strict require VLAN ID 1 in VLANs table to allow access of untagged traffic to switch itself.

VLAN optional and default vlan id <num> require VLAN ID <num> in VLANs table

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.