NAT Network - NAT is a separate network from the network the host is connected to. Any machine on the internet can reach the VM's and the VM's can reach the internet directly (of course if the HOST network is connected to internet).
The Bridge Network connects the VM's on to the same network the host is connected to. Similarly, a second VM can have an IP 152.50.60.32 if this IP is free. So if IP 152.50.60.30 is free, then VM can bind to this IP. Say the Host IP is some random 152.50.60.21 and the network CIDR is 152.50.60.0/24.īridge Network - Any VM connected through this interface can have any free IP on the network the host is connected to. The virtual switch provides a connectivity point for VMs to communicate over an IP network.TL DR - Why does Docker call it's default networking as Bridge Networking when it seems to be a lot like NAT Network.ġ) VMWare or VirtualBox handles networking for virtual machines.
Providing network connectivity for virtual machines requires the same sorts of configuration as a physical network. You can now ping your KVM host and guests. Link/ether de:3e:f4:9f:b2:c2 brd ff:ff:ff:ff:ff:ff Then you can run the VM, check the IP, and make sure it is the same subnet as on the host (10.0.1.0, in my case): 3: enp1s0: mtu 1500 qdisc noqueue fq_code1 state UP group default qlen 1000 (Vladimir Sokolenko, CC BY-SA 4.0) Click image for full-size view. The physical NIC of the host server is attached to an actual router with access to the rest of your LAN. Virtual machines (guests): Ubuntu Server 20.04 (IP: 10.0.1.253) and Windows 10 Professional (IP assigned by DHCP)Ī network bridge is a virtual switch that funnels the virtual guests through to the physical network interface card (NIC) of the RHEL host.KVM host (an on-premises physical server): Red Hat Enterprise Linux (RHEL) (IP address: 10.0.1.254).I'm using these components for this tutorial: This is a common base-level deployment for virtual hosts, and the same principles apply to this configuration as they would to a structure for hundreds of hosts. One of my favorite ways to configure my network is nmtui, a user-friendly console tool for the NetworkManager utility.
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