Arch Linux

Lichtprotoss

Member

Registered: 2021-09-01

Posts: 5

Route table flush needed after creating a bridge?

Hi everybody!

This is my first question. Thanks for reading this!

I created a bridge with the following code:

sudo systemctl stop dhcpcd

sudo ip addr flush dev <host_interface>
sudo ip route flush dev <host_interface>

sudo ip link add name br0 type bridge
sudo ip link set br0 address <bridge_mac_addr>
sudo ip link set br0 up

sudo ip link set <host_interface> up
sudo ip link set <host_interface> master br0

sudo systemctl start dhcpcd@br0.service

Still, the network connection won't work. I found out, that <host_interface> has an IP address and entries in the route table (ip route show). The network connection will only work, if I flush the <host_interface> route table entries:

sudo ip route flush dev <host_interface>

I didn't expect this last step and assume I missed a step or don't have a proper setup of the bridge.

Why do I have to do the last step? How can I improve my setup?

Thanks in advance. Your help is very much appreciated.

Cheers