odroid-auto-bridge

Simple method to create a bridge for the ODROID-C1+/C2/XU4.

Rationale

Is is known that both the ODROID-C1+ and ODROID-C2 (perhaps others) have a limitation with network bridges, at least as they apply to established network tools such as netctl and systemd-networkd. For some reason, neither tool is able to create and bring up a usable network bridge needed for linux containers among other things.

Solution

A simple solution to this problem is to use iproute2 and bridge-utils to create the bridge before either of the network managers is called. Once created, both netctl and systemd-networkd work to bring up the bridge.

This repo supplies a simple script to create the bridge and a systemd unit to call it. Enjoy!

Installation

• Users of Arch ARM can download odroid-auto-bridge from the AUR.
• Users of other distros can simply install manually, see: INSTALL for dependencies and instructions.

Upstream bug reports/forum posts referencing this limitation

• systemd/systemd#3648
• systemd/systemd#4945
• http://forum.odroid.com/viewtopic.php?f=141&t=25129

Examples

Note - Both examples below use DHCP; obviously static and more advanced setups can be used. See the respective man pages for systemd.network and netctl man page for more options.

Using systemd-networkd

1. Enable the odroid-auto-bridge service: systemctl enable odroid-auto-bridge
2. Create the following unit in /etc/systemd/network/ and insure that you have enabled the required services, then reboot:

# /etc/systemd/network/bridge.network
[Match]
Name=br0

[Network]
DHCP=yes

Using netctl

1. Enable the odroid-auto-bridge service: systemctl enable odroid-auto-bridge
2. Create the following profile in /etc/netctl/ and insure that you have enabled it, then reboot:

# /etc/netctl/bridge
Description="Example Bridge connection"
Interface=br0
Connection=bridge
BindsToInterfaces=(eth0)
IP=dhcp