Raspberry Pi Bridged Interfaces

pi-bridge.txt

# https://www.raspberrypi.com/documentation/computers/configuration.html#intro-to-bridged-wap
# https://www.maketecheasier.com/turn-raspberry-pi-into-wi-fi-bridge/

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sudo nano /etc/systemd/network/bridge-br0.netdev

[NetDev]
Name=br0
Kind=bridge

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sudo nano /etc/systemd/network/br0-member-eth0.network

[Match]
Name=eth0

[Network]
Bridge=br0

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sudo nano /etc/systemd/network/br0-member-eth1.network

[Match]
Name=eth1

[Network]
Bridge=br0

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sudo nano /etc/dhcpcd.conf

denyinterfaces veth*
denyinterfaces eth0 eth1

interface br0
static ip_address=192.168.1.20
static routers=192.168.1.1
static domain_name_servers=192.168.1.1

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sudo nano /etc/sysctl.conf

net.ipv4.ip_forward=1

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sudo systemctl enable systemd-networkd
systemctl disable systemd-networkd-wait-online.service
sudo reboot now