Setup DHCP Relay VyOS

#set service dhcp-relay interface YOUR_INTERFACE
Or,
#set service dhcp-relay server YOUR_SERVER_IP
#commit
#save

Reference:
https://docs.vyos.io/en/equuleus/configuration/service/dhcp-relay.html

Set an IP on an Interface in VyOS

#set interfaces ethernet YOUR_INTERFACE address YOUR_IP|dhcp|dhcpv6
#set interfaces ethernet YOUR_INTERFACE description DESCRIPTION_FOR_INTERFACE
#set interfaces ethernet YOUR_INTERFACE disable
#set interfaces ethernet YOUR_INTERFACE enable
#commit
#save

Reference:
https://docs.vyos.io/en/equuleus/configuration/interfaces/ethernet.html

Setting Passwords Cisco Router/Switch

Set a password for Console login

RTR-01#config t

RTR-01(config)#line console 0

RTR-01(config-line)#login (turns on login enable ability. Otherwise will not prompt)

RTR-01(config-line)#password cisco123

RTR-01(config-line)#end

Set an enable secret password

RTR-01#config t

RTR-01(config)#enable secret cisco123

RTR-01(config)#exit

RTR-01#disable (takes you back to user mode)

RTR-01>enable

Enter password: YOUR_PASSWORD_NOW

Set VTY password

RTR-01#config t

RTR-01(config)#line vty 0 15

RTR-01(config-line)#login (enables the login feature to the VTY line)

RTR-01(config-line)#password cisco123 (sets the password for the line login)

RTR-01(config-line)#end

Enable Global Password Encryption

RTR-01#config t

RTR-01(config)#service password-encryption