router_id=ddebe1ed-ea14-40bd-a053-d8f540c49013
new_l3_agent_id=669da68c-7920-43e7-918c-ff70098041be

current_l3_agent_id=$(neutron l3-agent-list-hosting-router $router_id -c id -f csv | tail -n 1 | sed 's/"//g')
neutron l3-agent-router-remove $current_l3_agent_id $router_id && neutron l3-agent-router-add $new_l3_agent_id $router_id