I am short on time these days and its hard to keep up. IP on host’s macvlan interface, physical interface without IP pro: The parent interface looks like a bridge or switch. To find out more, including how to control cookies, see here: Following output shows the interface related outputs for the ipvlan interfaces. If you specify a parent interface name with a dot included, such as eth0.

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Bridge learns MAC addresses by looking into the Frames headers of communicating hosts.

Introduction to Linux interfaces for virtual networking – RHD Blog

Brent Salisbury I have over 15 years of experience wearing various hats from, network engineer, architect, devops and software engineer. However, with the advent of virtualization, virtual machines running on physical hosts required Layer 2 connection to the physical network and other VMs. If your application can work using a bridge on a single Docker host or overlay to communicate across multiple Docker hoststhese solutions may be better in the long term. Next Configure Docker macvlan network Macvln multiple Docker macvlan networks on Take a look at the drivers and readme to learn more about Macvlan and Ipvlan and how to get started using the Docker drivers to do some awesome.

As we can see, mac address is same for both ipvlan sub-interface. Oinux, macvlan and liunx network drivers are examples of this approach. These are mainly used in containerization situations but can be useful for other things such as emulating network topologies in conjunction with bridges.


In ipvlan l2 mode, each endpoint gets the same macvln address but different ip address. VM and Container networking When running a linuc server, host networking can be straightforward with few ethernet interfaces and a default gateway providing external connectivity. Broadly, there are two ways for Containers or VMs to communicate to each other. This post covers the following frequently used interfaces and some interfaces that can be easily confused with one another:.

Macvlan offers a number of unique features and plenty of room for further innovations with the various modes. In bridge mode,Macvlan traffic goes through a physical device on the host.

maccvlan Here is an example adding a route on a tp-link router. VMs cannot directly communicate with the host. If you need to exclude IP addresses from being used in the Macvlan network, such as when a given IP address is already in use, use –aux-addresses:. Frames from one interface to another one get delivered directly and are not sent out.

Introduction to Linux interfaces for virtual networking. The docs for it can be found at: This adds VLAN 2 with name eth0. This will create a new interface called mac1 eth0 with a preset MAC address Llnux list of interfaces can be obtained using the command ip link help.

For overlay deployments that abstract away physical constraints see the multi-host overlay driver. When configuring a VLAN, you need to make sure the switch connected to the host is able to handle VLAN tags, for example, by setting the switch port to trunk mode.


You probably want to use macvlan in bridge mode. You also need to specify the parentwhich is the interface the traffic will physically go through on the Docker host. This also applies to multiple subnets within the same docker network.

Use Macvlan networks

All frames from sub-interfaces are forwarded out through the parent interface. To check your current kernel version, use uname -r to display your kernel version Macvlan Linux kernel lijux.

Linux Bridge acts like a regular hardware switch with learning and also supports protocols like STP for loop prevention. Assign a pair of IP addresses, and you can ping and communicate between the two namespaces.

With Bridge, it is needed to use NAT for external connectivity. Traditionally we think of bridges as a common domain to attach interfaces to.

Containers c1, c2 are connected to underlay interface ethx. One thing that makes maccvlan both very attractive is they do not use bridges in their implementation and natively namespace aware.