I have a proxmox server with two bridges, one vmbr0, connected to the company's local network and another vmbr1 to the internet through a mobile phone, the vmbr0 bridge with static ip works perfectly for me, vmbr1 obtains the ip by dhcp, which does it well. I created a virtual machine to which I put vmbr1 as the network, when I install it it perfectly obtains the ip by dhcp but already installed if I disconnect the mobile phone, which is connected to the proxmox by usb cable, it no longer obtains the ip and Of course I can't connect to the internet