Each virtual machine also has a virtual adapter exposing two interfaces: an ethX interface in the virtual machine and a vmeX interface on the server.The figure below demonstrates an example network configuration where two virtual machines, VM #1 and VM #2, are set to operate in the host-routed mode. The other network mode a virtual machine can work in is the host-routed mode. All incoming data packets for VM #1 and VM #2 reach the eth0 physical adapter first and are then transmitted through the bridge to the vme interface of the destination virtual machine.All outgoing data packets are sent from the virtual machines through the bridge and eth0 physical adapter to the destination, according to their routing tables.The virtual adapters of both virtual machines are bridged through the bridge br1 to the physical network adapter eth0.
VM #1 and VM #2 keep their own ARP and routing tables that they consult when sending or receiving data.Note: To simplify things, virtual adapters operating in the bridged mode are called vme adapters, though it is not quite correct from the technical point of view. An eth adapter has a MAC address, can be assigned one or more IP addresses, belong to different network environments, and so on. Both interfaces are closely linked to each other, which means that an IP packet entering one interface always comes out from the other one. Each virtual machine has a separate virtual adapter that exposes two interfaces: (1) an ethX interface in the virtual machine ( eth0 in the figure) and a vme interface on the server ( vme7b9a73a1.0 and vme4980d06a.0 in the figure).
The figure below demonstrates an example network configuration where two virtual machines, VM #1 and VM #2, are configured to work in the bridged mode. This section describes bridged and host-routed network modes for virtual machines.īy default, a new virtual machine is created with a network adapter that operates in the bridged mode.
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