Thank you proxmox staffs,
however I can`t say I`m happy with the answers :(. We have found pretty straightforward (but strange) way how to accomplish this task.
Here are the details:
proxmox1 - vmbr0, vmbr1, vmbr2, vmbr3 (master)
proxmox2 - vmbr0, vmbr11, vmbr12 (node)
each vmbr has...