Neutron Dynamic Routing with BGP

Documentation

https://docs.openstack.org/neutron-dynamic-routing/latest/

Example Usage

NOTE: based on https://docs.openstack.org/neutron/2024.1/admin/config-bgp-dynamic-routing.html

source novarc
openstack network agent list --agent-type bgp
openstack address scope create --share --ip-version 4 bgp
openstack subnet pool create --pool-prefix 10.5.0.0/16 \
                             --address-scope bgp provider
openstack subnet pool create --pool-prefix 192.168.21.0/24 \
                             --pool-prefix 192.168.22.0/24 \
                             --address-scope bgp --share selfservice
openstack network create provider --external \
                                  --provider-physical-network physnet1 \
                                  --provider-network-type flat
openstack subnet create --network provider --subnet-pool provider \
                        --prefix-length 16 \
                        --subnet-range 10.5.0.0/16 \
                        --allocation-pool start=10.5.150.0,end=10.5.200.254 \
                        --gateway 10.5.0.1 provider

openstack network create selfservice1
openstack network create selfservice2
openstack network create selfservice3
openstack subnet create --network selfservice1 --subnet-pool selfservice \
                        --subnet-range 192.168.21.0/24 \
                        --prefix-length 24 subnet1
openstack subnet create --network selfservice2 --subnet-pool selfservice \
                        --subnet-range 192.168.22.0/24 \
                        --prefix-length 24 subnet2
openstack subnet create --network selfservice3 subnet3 \
                        --subnet-range 192.168.23.0/24

openstack router create router1
openstack router create router2
openstack router create router3

openstack router add subnet router1 subnet1
openstack router add subnet router2 subnet2
openstack router add subnet router3 subnet3

openstack router set --external-gateway provider router1
openstack router set --external-gateway provider router2
openstack router set --external-gateway provider router3

openstack bpg speaker create --ip-version 4 \
                             --local-as 1234 bgpspeaker

openstack bgp speaker add network bgpspeaker provider
openstack bgp speaker show bgpspeaker
openstack bgp speaker list advertised routes bgpspeaker
openstack bgp peer create --peer-ip 192.0.2.1 \
                          --remote-as 4321 bgppeer
openstack bgp speaker add peer bgpspeaker bgppeer
openstack bgp speaker show bgppeer

Assumes no l3-HA

dr_agent=`openstack network agent list --agent-type bgp -c id -f value`

openstack bpg dragent add speaker $dr_agent bgpspeaker
openstack bgp dragent list --bgp-speaker bgpspeaker
openstack bgp speaker list --agent $dr_agent