Hi,

br-tun is set up by Neutron ovs-agent, so you don't have to touch it.

In your ml2_conf.ini you should have a tunnel_bridge and a local_ip cfg option which will result in an interface on br-tun like this one (in case of vxlan tunnels):

...

Bridge br-tun

....

Port vxlan-646d00dd

Interface vxlan-646d00dd
type: vxlan
options: {df_default="true", egress_pkt_mark="0", in_key=flow, local_ip="local_ip", out_key=flow, remote_ip="<ip of another host on which you have ovs agent>"}

So if you have tunnel_types = vxlan,gre, you will have a vxlan-xyz and one gre-abcd port in br-tun.

Best wishes

Lajos Katona (lajoskatona)

Jaime Ibar <jim2k7@gmail.com> ezt írta (időpont: 2024. febr. 21., Sze, 15:28):

Hi all,

I'm setting up neutron and ovs and I can't make br-tun work and pick up the ip address
configured in openvswitch_agent.ini file. If I tcpdump br-tun

tcpdump -l -n -i br-tun 'port 4789'

I don't see any traffic getting through however(it goes through the physical interface) if I spin up a vm, it reaches the internet, I can ping it from another machine after allocating a floating ip but can't ssh into it.

Can anyone please share the /etc/network/interfaces file configuration for br-tun?
Should the br-tun ip address be configured on the bridge or in the physical interface the bridge is attached to?
Should the vxlan traffic go through br-tun bridge?

Thanks
Jaime

--
salu2

Jaime