Linux Bridge

Proxmox from scratch · Part 5

Networking inside Proxmox

So far every guest in this series has been plugged into vmbr0, and I told you to keep the default. In this part we look at what that means, how to split guests into separate networks, and how to find out what a guest is actually doing on the network.

How Proxmox networking works

Linux bridges (vmbr0)

A bridge is a switch made of software. Your guests’ virtual network cards plug into it, and so does a physical network port on the server. The installer sets up exactly one: it “creates a single bridge named vmbr0, which is connected to the first Ethernet card” [1]. The server’s own IP address sits on that bridge as well.